MAI MULT A TANUT LUI TRINIDO NA MINI US010091498B1 ( 12 ) United States Patent Higdon et al . ( 10 ) Patent No .: US 10 , 091 , 498 B1 ( 45 ) Date of Patent : * Oct . 2, 2018 ( 56 ) References Cited ( 54 ) VIDEO TIMING TEST EQUIPMENT AND METHODS OF USING THE SAME FOR MEASURING LIGHT INTEGRATION TIME OF A CAMERA U . S . PATENT DOCUMENTS ( 71 ) Applicant : The United States of America , as represented by the Secretary of the Navy , Washington , DC ( US ) . . . . HO4N 5 / 235 5 , 235 , 416 A 8 / 1993 Stanhope 6 , 759 , 814 B2 7 / 2004 Vogel 8 , 860 , 819 B2 10 / 2014 Okincha 9 , 077 . 961 B1 * 7 / 2015 Saltzman 9 , 565 , 425 B2 2 / 2017 Shiohara 9 . 866 , 828 B1 * 1/ 2018 Higdon 2010 / 0147952 A1 6 / 2010 Carlson 2012 / 0187190 A1 7 / 2012 Wang 2013 / 0161392 A16 / 2013 Goren 2013 / 0235052 A1 * 9 / 2013 Seo . . .. . . .. . . .. . H04N 17 / 002 ( 72 ) Inventors : James Higdon , Ridgecrest , CA ( US ); Jason Witzel , Ridgecrest , CA ( US ) H04N 13 / 0438 345 / 520 ( 73 ) Assignee : The United States of America as Represented by the Secretary of the Navy , Washington , DC ( US ) 2014 / 0078277 A13 / 2014 Dai 2014 / 0078278 A13 / 2014 Lei * cited by examiner ( * ) Notice : Subject to any disclaimer , the term of this patent is extended or adjusted under 35 U .S .C . 154 ( b ) by 0 days . This patent is subject to a terminal dis claimer . Primary Examiner — Paulos M Natnael ( 74 ) Attorney , Agent , or Firm — Jimmy M . Sauz @ ( 21 ) Appl . No .: 15 / 822 , 984 ( 22 ) Filed : Nov . 27 , 2017 Related U .S . Application Data ( 62 ) Division of application No . 15 / 596 , 142 , filed on May 16 , 2017 ( 57 ) ABSTRACT A video timing test equipment for measuring light integra tion time of a camera . The video timing test equipment may comprise : a control unit and shutter timing test unit . The control unit may generate input timing signals adjustable by a user . The shutter timing test unit may comprise light emitting diodes ( LEDs ), infrared light emitting diodes ( IR LEDs ), and an output controller . The output controller may regulate the illumination of the LEDs and IR LEDs based on the input timing signals . The shutter timing test unit may also comprise a UTC time display , edge time display , and pulse width display . The UTC time display may depict a UTC time as to when light integration begins or ends . The edge time display may depict an offset time associated with the start or end of light integration . The pulse width display may depict the duration of light integration . ( 51 ) Int . Cl . H04N 17 / 00 ( 2006 . 01 ) ( 52 ) U .S . CI . ??? . ... ... ... . . . . .. . . .. . . H04N 17 / 002 ( 2013 . 01 ) Field of Classification Search CPC . .. .. .. . .. . . . . .. .. . . . . . .. . HO4N 17 / 002 See application file for complete search history . 18 Claims , 7 Drawing Sheets - - - - - - - - - - GPS 1 Pulse Per Second 202 GPS UTC Time Message Set - - UTC - Time - - - - - - - 201 - - 613 - - - 50MHz Clock - - - - - - - - - - - - Shutter Timing Test Source 300 696 602 UTC Timing Module 605 , LED and UTC Output Module 615 1PPS Signal UTC | 201607604 Comparator Time Logic Adjustment Counter 619 617 619 Register 609 608 BCD LEDs 325 618 and + 616 BCD IR LEDs 335 Output Controller Timing LEDs Input Timing 631 Display Logic and Logic Timing IR LEDs 632 330 664 612 UTC Time 310 315 Display - - - - - - - - - - HELI - - - - - - - - - - - - User - - 320 - - - Control Unit - - - - - - - - - - - 400 611 - - 305 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Edge Time Display - Pulse Width Display - - - - User Input and Display Module 610 ; - - - - - - -
Transcript
MAI MULT A TANUT LUI TRINIDO NA MINI US010091498B1
( 12 ) United States Patent Higdon et al .
( 10 ) Patent No . : US 10 , 091 , 498 B1 ( 45 ) Date of Patent : * Oct . 2 , 2018
( 56 ) References Cited ( 54 ) VIDEO TIMING TEST EQUIPMENT AND METHODS OF USING THE SAME FOR MEASURING LIGHT INTEGRATION TIME OF A CAMERA
U . S . PATENT DOCUMENTS
( 71 ) Applicant : The United States of America , as represented by the Secretary of the Navy , Washington , DC ( US )
Jason Witzel , Ridgecrest , CA ( US ) H04N 13 / 0438
345 / 520 ( 73 ) Assignee : The United States of America as Represented by the Secretary of the Navy , Washington , DC ( US )
2014 / 0078277 A13 / 2014 Dai 2014 / 0078278 A13 / 2014 Lei
* cited by examiner ( * ) Notice : Subject to any disclaimer , the term of this patent is extended or adjusted under 35 U . S . C . 154 ( b ) by 0 days . This patent is subject to a terminal dis claimer .
Primary Examiner — Paulos M Natnael ( 74 ) Attorney , Agent , or Firm — Jimmy M . Sauz
Related U . S . Application Data ( 62 ) Division of application No . 15 / 596 , 142 , filed on May
16 , 2017
( 57 ) ABSTRACT A video timing test equipment for measuring light integra tion time of a camera . The video timing test equipment may comprise : a control unit and shutter timing test unit . The control unit may generate input timing signals adjustable by a user . The shutter timing test unit may comprise light emitting diodes ( LEDs ) , infrared light emitting diodes ( IR LEDs ) , and an output controller . The output controller may regulate the illumination of the LEDs and IR LEDs based on the input timing signals . The shutter timing test unit may also comprise a UTC time display , edge time display , and pulse width display . The UTC time display may depict a UTC time as to when light integration begins or ends . The edge time display may depict an offset time associated with the start or end of light integration . The pulse width display may depict the duration of light integration .
L - - - - - set - - - . . . 11 11 IL men som den e r mest o - - - - Me on ww ws - ti . . . - -
- ??? ? ?? ?? ?? ? ??? ??? ??? ? ? ?? ??? ?? ? TIMING IR LEDS i
J
3 3 330 N 331b / 332 333b 331a 333a FIG . 7A
631
12 LED 2 709 710 - 701 L1 LED 702 710b
Center LED center LED 7305 b ? 1 . 703 710a - 711a R1 LED -
R2 LED 2 T704
705 FIG . 7B
US 10 , 091 , 498 B1
VIDEO TIMING TEST EQUIPMENT AND calibration mechanisms for measuring with precision the METHODS OF USING THE SAME FOR timing of light integration for cameras .
MEASURING LIGHT INTEGRATION TIME OF A CAMERA SUMMARY OF ILLUSTRATIVE
EMBODIMENTS CROSS - REFERENCE TO RELATED
APPLICATIONS To minimize the limitations in the related art and other limitations that will become apparent upon reading and
This application is a divisional patent application of the understanding the present specification , the following dis commonly owned , U . S . non - provisional patent application N 10 closes a new and useful video timing test equipment and Ser . No . 15 / 596 , 142 , titled “ Video Timing Test Equipment methods of using the same for measuring light integration
time of a camera . and Methods of Using the Same For Measuring Light One embodiment may be a video timing test equipment Integration Time of a Camera , ” filed on May 16 , 2017 by by for measuring light integration time of a camera under test , for co - inventors James Higdon and Jason Witzel , the contents of 15 e contents of 15 comprising : a control unit capable of generating a plurality which is hereby expressly incorporated herein by reference of input timing signals adjustable by a user : and a shutter in its entirety and to which priority is claimed . timing test unit operatively coupled to the control unit , the
shutter timing test unit comprising : a plurality of timing light STATEMENT REGARDING FEDERALLY emitting diodes ( LEDs ) , including : at least one left timing
SPONSORED RESEARCH OR DEVELOPMENT 20 LED , a center timing LED , and at least one right timing LED ; and an output controller capable of regulating an
The invention disclosed herein may be manufactured and illumination of the plurality of timing LEDs by generating a used by or for the government of the United States of plurality of timing LED output signals , each having an offset America for governmental purposes without the payment of time occurring sequentially and corresponding to an asso any royalties thereon or therefor . 25 ciated one of the plurality of timing LEDs ; wherein the
plurality of timing LED output signals may be adjusted by FIELD the user based on the plurality of input timing signals and
may include a center timing LED output signal associated The present disclosure relates generally to test equipment with the illumination of the center timing LED ; and wherein
for camera shutter systems and , more particularly , to cali - 30 the output controller may be configured to : ( i ) illuminate the bration mechanisms for measuring light integration time of center timing LED based on the offset time of the center a camera under test , including visible cameras and infrared timing LED output signal ; ( ii ) illuminate the at least one left cameras . timing LED before the illumination of the center timing
LED ; and ( iii ) illuminate the at least one right timing LED BACKGROUND 35 after the illumination of the center timing LED . The shutter
timing test unit may further comprise : a coordinated uni In order to support testing and training activities , many versal time ( UTC ) time display in communication with the
open air ranges utilize multiple cameras to capture images in output controller , a UTC timing module capable of gener both visible and non - visible spectra . These cameras are ating a current UTC time signal ; and a timing logic capable generally used to record a test event and are generally 40 of generating a center timing LED UTC time matching
signal based on the current UTC time signal and the plurality synchronized to a precision time source ( e . g . , coordinated of input timing signals ; wherein the output controller may be time source ( UTC ) ) to help create coordinated imagery of capable of displaying on the UTC time display a UTC time the test event . The resulting imagery capturing the test event based on the center timing LED UTC time matching signal , is then preferably fed into image processing software and 45 the UTC time corresponding to a UTC start time or a UTC fused to generate position versus time data or time - space end time of the light integration . The shutter timing test unit position information ( TSPI ) data . may further comprise : a plurality of binary coded decimal
The resulting TSPI data , however , may be susceptible to ( BCD ) LEDs in communication with the output controller ; error and is generally only as precise as the least precise data and wherein the output controller may be capable of dis source used to generate that data . Thus , any improvement to 50 playing the UTC time in BCD format with the plurality of the accuracy of the timing of the camera shutter speeds will BCD LEDs . The shutter timing test unit may further com likely result in an improvement in the generated TSPI data . prise : a plurality of BCD infrared light emitting diodes ( IR The frame rate for some of these cameras can be altered , LEDs ) in communication with the output controller ; wherein thereby modifying how often an image frame is recorded for the output controller may be capable of displaying the UTC each specific test . But , depending on the manufacturer of 55 time in BCD format with the plurality of BCD IR LEDs . The each camera device , the timing of the camera shutter may shutter timing test unit may further comprise : a user input vary , even when using the same input synchronization display logic ; and an edge time display in communication signal . More importantly , in some cases , the shutter timing with the user input display logic ; wherein the user input might not even conform to the manufacturer - provided speci - display logic may be capable of displaying the offset time of fications . As a result , given the possible shutter timing 60 the center timing LED on the edge time display based on the inconsistencies of the cameras , it might become more dif - plurality of input timing signals . The shutter timing test unit ficult or impossible to determine the timing of critical events may further comprise : a pulse width display in communi with a necessary degree of precision . cation with the user input display logic ; wherein the user
Therefore , based on the foregoing , a need exists that input display logic may be capable of displaying a pulse overcomes these deficiencies . The present disclosure solves 65 width time on the pulse width display based on the plurality the inconsistent shutter timing deficiencies and generally of input timing signals . The shutter timing test unit may represents a new and useful innovation in the realm of further comprise : a plurality of timing IR LEDs , including at
US 10 , 091 , 498 B1
least one left timing IR LED , a center timing IR LED , and time of the center timing LED output signal ; ( ii ) illuminate at least one right timing IR LED ; wherein the output the at least one left timing IR LED before the illumination controller may be capable of regulating an illumination of of the center timing IR LED ; and ( iii ) illuminate the at least the plurality of timing IR LEDs based on the plurality of one right timing IR LED after the illumination of the center timing LED output signals , such that the output controller 5 timing IR LED . The shutter timing test unit may further may be configured to : ( i ) illuminate the center timing IR comprise : a plurality of BCD LEDs in communication with LED based on the offset time of the center timing LED the output controller ; wherein the output controller may be output signal ; ( ii ) illuminate the at least one left timing IR capable of displaying the UTC time in BCD format with the LED before the illumination of the center timing IR LED ; plurality of BCD LEDs . The shutter timing test unit may and ( iii ) illuminate the at least one right timing IR LED after 10 further comprise : a plurality of BCD IR LEDs in commu the illumination of the center timing IR LED . The control nication with the output controller ; wherein the output unit may comprise a toggle switch movable between a start controller may be capable of displaying the UTC time in position and an end position , the start position being asso - BCD format using the plurality of BCD IR LEDs . The ciated with a leading edge of the center timing LED output shutter timing test unit may further comprise : a user input signal and the end position being associated with a trailing 15 display logic ; and an edge time display in communication edge of the center timing LED output signal , such that the with the user input display logic ; wherein the user input start position corresponds to a start of light integration and display logic may be capable of displaying the offset time of the end position corresponds to an end of the light integra - the center timing LED on the edge time display based on the tion . plurality of input timing signals . The shutter timing test unit
Another embodiment may be a video timing test equip - 20 may further comprise : a pulse width display in communi ment for measuring light integration time of a camera under cation with the user input display logic ; wherein the user test , comprising : a control unit capable of generating a input display logic may be capable of displaying a pulse plurality of input timing signals adjustable by a user ; and a width time on the pulse width display based on the plurality shutter timing test unit operatively coupled to the control of input timing signals . The control unit may comprise a unit , the shutter timing test unit comprising : a plurality of 25 toggle switch movable between a start position and an end timing LEDs , including : at least one left timing LED , a position , the start position being associated with a leading center timing LED , and at least one right timing LED ; a edge of the center timing LED output signal and the end timing logic capable of generating a first timing LED start position being associated with a trailing edge of the center time signal and a pulse width signal , based on the plurality timing LED output signal , such that the start position of input timing signals , wherein the first timing LED start 30 corresponds to a start of light integration and the end time signal may correspond to a start time as to when a first position corresponds to an end of the light integration . of the plurality of timing LEDs begins to illuminate and Another embodiment may be a method for measuring wherein the pulse width signal may correspond to a time light integration time of a camera under test with a video period for illuminating each of the plurality of timing LEDs ; timing test equipment , comprising : providing a video timing an output controller capable of regulating an illumination of 35 test equipment having a control unit and a shutter timing test the plurality of timing LEDs by generating a plurality of unit ; wherein the control unit may be capable of generating timing LED output signals , each having an offset time a plurality of input timing signals adjustable by a user and occurring sequentially and corresponding to an associated may comprise : ( 1 ) a toggle switch and ( 2 ) at least one rotary one of the plurality of timing LEDs , the plurality of timing control knob ; wherein the toggle switch may be selectable LED output signals being adjusted based on : ( 1 ) the first 40 between a start of light integration and an end of light timing LED start time signal and ( 2 ) the pulse width signal integration and wherein the at least one rotary control knob and including a center timing LED output signal associated may be used to adjust an offset time of the start and the end with the illumination of the center timing LED ; wherein the of light integration ; wherein the shutter timing test unit may output controller may be configured to : ( i ) illuminate the be operatively coupled to the control unit and may comprise : center timing LED based on the offset time of the center 45 a plurality of timing LEDs , including : at least one left timing timing LED output signal ; ( ii ) illuminate the at least one left LED , a center timing LED , and at least one right timing timing LED before the illumination of the center timing LED ; and an output controller capable of regulating an LED ; and ( iii ) illuminate the at least one right timing LED illumination of the plurality of timing LEDs by generating a after the illumination of the center timing LED . The shutter plurality of timing LED output signals , each having an offset timing test unit may further comprise : a UTC timing module 50 time increasing successively and corresponding to an asso capable of generating a current UTC time signal ; and a UTC ciated one of the plurality of timing LEDs , the plurality of time display in communication with the output controller ; timing LED output signals being adjusted based on the wherein the timing logic may be capable of generating a plurality of input timing signals and includes a center timing center timing LED UTC time matching signal based on the LED output signal associated with the illumination of the current UTC time signal and the plurality of input timing 55 center timing LED ; wherein the output controller may be signals ; and wherein the output controller may be capable of configured to : ( i ) illuminate the center timing LED based on displaying on the UTC time display a UTC time based on the the offset time of the center timing LED output signal ; ( ii ) center timing LED UTC time matching signal , the UTC time illuminate the at least one left timing LED before the corresponding to a UTC start time or a UTC end time of the illumination of the center timing LED ; and ( iii ) illuminate light integration . The shutter timing unit may further com - 60 the at least one right timing LED after the illumination of the prise : a plurality of timing IR LEDs , including at least one center timing LED ; positioning the shutter timing test unit in left timing IR LED , a center timing IR LED , and at least one view of a camera under test , such that , a monitor in video right timing IR LED ; wherein the output controller may be communication with the camera under test may display a capable of regulating an illumination of the plurality of video image of the timing LEDs of the shutter timing test timing IR LEDs based on the plurality of timing LED output 65 unit ; adjusting the toggle switch of the control unit to select signals , such that the output controller may be configured to : the start of light integration ; and , while viewing the timing ( i ) illuminate the center timing IR LED based on the offset LEDs on the monitor , adjusting the at least one control knob
US 10 , 091 , 498 B1
of the control unit until the at least one left timing LED stops FIG . 4 is an illustration of one embodiment of a control illuminating and the center timing LED illuminates in order unit and shows how the settings of the control unit would be to measure the start of the light integration . The method may adjusted in order to measure the start of light integration . further comprise the steps : adjusting the toggle switch of the FIG . 5 is an illustration of one embodiment of a control control unit to select the end of the light integration ; and , 5 unit and shows how the settings of the control unit would be while viewing the timing LEDs on the monitor , adjusting the adjusted in order to measure the end of light integration . at least one control knob of the control unit until the at least FIG . 6 is a block diagram of the video timing test the center timing LED illuminates and the at least one right equipment according to various embodiments of the present timing LED stops illuminating in order to determine the end disclosure . of light integration . The shutter timing test unit may further 10 FIGS . 7A and 7B are illustrations of some embodiments comprise a UTC time display ; wherein the UTC time display of the timing LEDs , timing IR LEDs , and timing LED output may depict a UTC start time when selecting the start of the signals and show the timing relationship of these timing light integration with the control unit ; and wherein the LEDs , timing IR LEDs , and timing LED output signals . method may further comprise the steps : adjusting the toggle switch of the control unit to select the start of light integra - 15 DETAILED DESCRIPTION OF ILLUSTRATIVE tion ; and verifying that a UTC time overlay displayed on the EMBODIMENTS monitor and generated by the camera under test is substan tially identical to the UTC start time depicted on the UTC In the following detailed description , numerous specific time display of the shutter timing test unit . The UTC time details are set forth in order to provide a thorough under display may depict a UTC end time when selecting the end 20 standing of various aspects of one or more embodiments of of light integration with the control unit ; and wherein the the video timing test equipment . However , these embodi method may further comprise the steps : adjusting the toggle ments may be practiced without some or all of these specific switch of the control unit to select the end of light integra details . In other instances , well - known methods , procedures , tion ; and verifying that a UTC time overlay displayed on the and / or components have not been described in detail so as monitor and generated by the camera under test is substan - 25 not to unnecessarily obscure aspects of these embodiments . tially identical to the UTC end time depicted on the UTC While multiple embodiments of the video timing test time display of the shutter timing test unit . equipment are disclosed , still other embodiments will
In one embodiment , the current time signal may be become apparent to those skilled in the art from the follow modulated with time data according to Inter Range Instru - ing detailed description . As will be realized , the following mentation Group ( IRIG ) code . The control unit may com - 30 embodiments of the video timing test equipment may be prise a toggle switch movable between a start position and capable of modifications in various obvious aspects , all an end position , the start position corresponding to a start of without departing from the spirit and scope of protection . light integration and the end position corresponding to an Accordingly , the graphs , figures , and the detailed descrip end of the light integration . tions thereof , are to be regarded as illustrative in nature and
It is an object to provide video timing test equipment and 35 not restrictive . Also , the reference or non - reference to a methods for using the same for measuring and verifying the particular embodiment shall not be interpreted to limit the exact shutter time and speed of each camera ( i . e . , visible and scope of the disclosure . infrared cameras ) to the nearest microsecond for frame rates Before the embodiments are disclosed and described , it is up to 1 , 600 frames per second . to be understood that this these embodiments are not limited
It is an object to overcome the limitations of the prior art . 40 to the particular structures , process steps , or materials dis These , as well as other components , steps , features , closed herein , but is extended to equivalents thereof as
objects , benefits , and advantages , will now become clear would be recognized by those ordinarily skilled in the from a review of the following detailed description of relevant arts . It should also be understood that terminology illustrative embodiments , the accompanying drawings , and employed herein is used for the purpose of describing the claims . 45 particular embodiments only and is not intended to be
limiting . BRIEF DESCRIPTION OF THE DRAWINGS It should also be understood that some of the functional
units described in this specification might have been labeled The drawings are illustrative embodiments . They do not as modules , in order to more particularly emphasize their
illustrate all embodiments . They do not set forth all embodi - 50 implementation independence . For example , a module may ments . Other embodiments may be used in addition or be implemented as a hardware circuit comprising custom instead . Details , which may be apparent or unnecessary , may VLSI circuits or gate arrays , off - the - shelf semiconductors be omitted to save space or for more effective illustration such as logic chips , transistors , or other discrete compo Some embodiments may be practiced with additional com nents . A module may also be implemented in programmable ponents or steps and / or without all of the components or 55 hardware devices such as field programmable gate arrays , steps , which are illustrated . When the same numeral appears programmable array logic , programmable logic devices or in different drawings , it is intended to refer to the same or the like . like components or steps . Modules may also be implemented in software for execu
FIG . 1 is an illustration of a test setup for one embodiment tion by various types of processors . An identified module of of the video timing test equipment for measuring light 60 executable code may , for instance , comprise one or more integration time of a camera under test . physical or logical blocks of computer instructions , which
FIG . 2 is an illustration of one embodiment of a shutter may , for instance , be organized as an object , procedure , or timing test unit as depicted on a video monitor and shows the function . Nevertheless , the executables of an identified shutter timing test unit at the beginning of light integration . module need not be physically located together , but may
FIG . 3 is an illustration of one embodiment of a shutter 65 comprise disparate instructions stored in different locations timing test unit as depicted on a video monitor and shows the which , when joined logically together , comprise the module shutter timing test unit at the end of light integration . and achieve the stated purpose for the module .
US 10 , 091 , 498 B1
Indeed , a module of executable code may be a single The present disclosure is directed to video timing test instruction , or many instructions , and may even be distrib equipment for accurately measuring the start time and end uted over several different code segments , among different time of light integration for cameras , including visible programs , and across several memory devices . Similarly , cameras and infrared cameras . In general , the video timing operational data may be identified and illustrated herein 5 test equipment may utilize a camera or video recorder , within modules , and may be embodied in any suitable form preferably with single frame step , to measure the accuracy and organized within any suitable type of data structure . The of video overlay and metadata time stamp . In one embodi operational data may be collected as a single data set , or may ment , the video timing test equipment may utilize a global be distributed over different locations including over differ - positioning system ( GPS ) coordinate universal time ( UTC ) ent storage devices , and may exist , at least partially , merely time message signal along with a one pulse per second as electronic signals on a system or network . The modules ( 1PPS ) output signal to generate a timing accuracy of may be passive or active , including agents operable to approximately one microsecond . Preferably , the timing perform desired functions . accuracy is expressed through the use of light emitting
Reference throughout this specification to “ one embodi - 15 diodes ( LEDs ) and infrared ( IR ) LEDs , which may be ment ” , “ an embodiment " , or " another embodiment ” may synchronized to a video frame rate signal . Thus , various mean that a particular feature , structure , or characteristic embodiments of the video timing test equipment may utilize described in connection with the embodiment may be high speed LEDs ( i . e . , switching within 0 - 100 nanosec included in at least one embodiment of the present disclo onds ) . sure . Thus , appearances of the phrases " in one embodiment ” 20 In various embodiments , the video timing test equipment or “ in an embodiment ” in various places throughout this may comprise three components : ( 1 ) shutter timing test unit , specification may not necessarily refer to the same embodi ( 2 ) a control unit , and ( 3 ) a GPS receiver for generating the ment . UTC time message signal . In some embodiments , the GPS
Furthermore , the described features , structures , or char - receiver may be internal to or integrated with the shutter acteristics may be combined in any suitable manner in one 25 timing test unit or control unit , but may be a separate or more embodiments . In the following description , numer - independent device . Similarly , in other embodiments , the ous specific details are provided , such as examples of shutter timing test unit and control unit may be integrated as materials , fasteners , sizes , lengths , widths , shapes , etc . . . , a single device or may be separate independent devices . to provide a thorough understanding of the embodiments . The shutter timing test unit generally serves as a calibra One skilled in the relevant art will recognize , however , that 30 tion timing display unit and may comprise three major the scope of protection can be practiced without one or more components : ( i ) timing LEDs for measuring the integration of the specific details , or with other methods , components , time of a light sensor of a camera , ( ii ) digital display ( e . g . , materials , etc . . . . In other instances , well - known structures , seven segment displays ) or LED display for displaying UTC materials , or operations are generally not shown or described time , and ( iii ) various indicators and displays for showing in detail to avoid obscuring aspects of the disclosure . 35 edge time , pulse width , frame rate , and offset time .
The control unit may be used generate input timing Definitions signals , and these input timing signals may be adjustable by
a user . Importantly , the input timing signals may be used to In the following description , certain terminology is used synchronize the timing of the LEDs with the start and end
to describe certain features of one or more embodiments . For 40 times of light integration . example , as used herein , the terms " camera , " " visible cam - When measuring the start of light integration , the user era , ” and “ infrared camera " generally refer to an optical may adjust the offset time or edge time in one microsecond device or component capable of acquiring , capturing , and / or steps until ( 1 ) the center timing LED illuminates and ( 2 ) recording visual images of an object of interest in the form timing LED just to the left of the center timing LED of image and / or video signals . In other embodiments , a 45 extinguishes . Here , the UTC time portion of the display may camera may also be used to capture and / or record visual be locked to the exact time when the center timing LED first images in the form of photographs and film . illuminates , so that the UTC time is stable on the recording As used herein , the terms “ application ” , “ software ” , or for the entire video frame for any integration time selected
" software application ” generally refer to any set of machine for the camera . readable instructions on a client machine , web interface , 50 On the other hand , when measuring the end of light and / or computer system , that directs a computer ' s processor integration , the user may adjust the offset time or edge time to perform specific steps , processes , or operations disclosed in one microsecond steps until ( 1 ) the center timing LED herein . illuminates and ( 2 ) the timing LED just to the right of the As used herein , the term " display ” refers to display center timing LED extinguishes . Here , the UTC time portion
elements including but not limited to seven - segment dis - 55 of the display may be locked to the exact time when the plays , light emitting diodes ( LEDs ) , or the like . center timing LED first turns off , so that the UTC time is
As used herein , the term " pulse width ” refers to the stable on the recording for the entire video frame for any amount of time , within a period of a signal ( e . g . , a digital integration time selected for the camera . pulse width modulation voltage signal ) , that the value of the FIG . 1 is an illustration of a test setup for one embodiment signal is above or below a reference value ( e . g . , electrical 60 of the video timing test equipment for measuring light ground ) . integration time of a camera under test . As shown in FIG . 1 ,
As used herein , the singular forms “ a ” and “ the ” may one embodiment of a test setup 10 may comprise : a video include plural referents , unless the context clearly dictates timing test equipment 100 , visible camera 105 , infrared otherwise . Thus , for example , reference to a " display ” , camera 110 , video synchronizer and time overlay generator " UTC time display " , " edge time display " , or " pulse width 65 115 , video recorder 120 , and monitor 125 . The video timing time display ” can include reference to one or more of such test equipment 100 may comprise : a GPS receiver 200 , displays . shutter timing test unit 300 , and a control unit 400 .
US 10 , 091 , 498 B1 10
FIG . 1 shows that the visible camera 105 may be in video illumination of those LEDs and IR LEDs based on the communication with the video synchronizer and time over user - inputted selected settings . In this manner , the shutter lay generator 115 in order to transmit a visible video signal timing test unit 300 may visually display various timing data 106 to the video synchronizer and time overlay generator configured by the user . Such timing data may include , 115 . This may allow the visible camera 105 to transmit 5 without limitation , edge time , pulse width time , and UTC visible light images to the video synchronizer and time time . In various embodiments , the UTC time may be syn overlay generator 115 . Similarly , FIG . 1 shows that the chronized with the illumination of one or more LEDs , such infrared camera 110 may also be in video communication as timing LEDs , timing IR LEDs , binary coded decimal with the video synchronizer and time overlay generator 115 ( BCD ) LEDs , and BCD IR LEDs . In a preferred embodi in order to transmit an infrared video signal 111 to the video 10 ment , the UTC time may be synchronized with the center synchronizer and time overlay generator 115 . This may also timing LED and center timing IR LED . Preferably , the allow the infrared camera 110 to also transmit infrared light shutter timing test unit 300 utilizes high speed LEDs such as images to the video synchronizer and time overlay generator LEDs with less than 100 nanosecond switching . 115 . Given that both video signals may be transmitted to the Importantly , FIG . 1 also shows that the video timing test video synchronizer and time overlay generator 115 , the 15 equipment 100 may be positioned within view of the visible video synchronizer and time overlay generator 115 may camera 105 and / or infrared camera 110 . As a result , the user synchronize both of these video signals to create a synchro - may view the video timing test equipment 100 with the nized video signal 117 . The video synchronizer and time monitor 125 in order to observe the illumination activity of overlay generator 115 may also transmit a camera vertical the LED and display components of the shutter timing test synchronization signal 116 to the visible camera 105 and / or 20 unit 300 . In particular , the user may be able to view and infrared camera 110 in order to help synchronize the infrared observe the action of various components of the video video signal 111 and visible video signal 106 . timing test equipment 100 such as LEDs ( i . e . , timing LEDs
FIG . 1 also shows that the video synchronizer and time 320 , BCD LEDs 325 , timing IR LEDs 330 , BCD IR LEDs overlay generator 115 may output the synchronized video 335 ) ( all shown in FIGS . 2 and 3 ) and displays ( i . e . , UTC signal 117 to a monitor 125 and / or video recorder 120 . This 25 time display 305 , edge time display 310 , pulse width display may allow the user to view the video signals captured by the 315 ) ( all shown in FIGS . 2 and 3 ) . Thus , by adjusting the visible camera 105 and infrared camera 110 . The user may timing inputs generated by the control unit 400 and observ also record the synchronized video signal 117 with the video ing the LED and display components of the shutter timing recorder 120 for record keeping . Importantly , the use of a test unit 300 , the user may be able to synchronize the timing video recorder 120 with a single frame step may help 30 of the video frame rate signal with the illumination of the measure the accuracy of the video overlay and meta data LEDs and IR LEDs in order to measure light integration time stamp ( i . e . , UTC time ) . This may be accomplished by time . Moreover , as recited above , the user may be able to having the user compare the meta data time stamp generated verify the UTC time generated by the visible camera 105 and by the synchronizer and time overlay generator 115 with the infrared camera 110 by comparing the UTC time overlay current UTC time obtained from the GPS receiver . Although 35 displayed on the monitor 125 ( created by the video synchro FIG . 1 shows that a video recorder 120 is used for the test nizer and time overlay generator 115 ) with the actual UTC setup 10 , the user may create a test setup without a video time obtained from the GPS receiver 200 . Additional details recorder . as to how to measure light integration and verify UTC time
FIG . 1 also shows that the video timing test equipment are discussed below . 100 may comprise three separate units : a GPS receiver 200 , 40 Although FIG . 1 shows that the video timing test equip a shutter timing test unit 300 , and a control unit 400 . The ment 100 may comprise three separate units ( i . e . , the GPS GPS receiver 200 may be a typical receiver configured to receiver 200 , shutter timing test unit 300 , and a control unit acquire GPS signals ( i . e . , a UTC time message 201 and a one 400 ) , various embodiments of the video timing test equip pulse per second ( 1PPS ) GPS signal 202 ( e . g . , L1 signal ) ) ment may comprise one , two , or three standalone devices . and may be configured to output those signals to the shutter 45 For example , in one embodiment of the video timing test timing test unit 300 . The GPS signals may also be used to equipment , the GPS receiver 200 , shutter timing test source determine UTC time information . 300 , and a control unit 400 may be integrated as a single unit
The control unit 400 may be a control interface that allows or device . On the other hand , another embodiment of the a user to select various timing inputs for the video timing test video timing test equipment may comprise two standalone equipment 100 . In particular , when using the control unit 50 devices . For instance , in one embodiment , the video timing 400 , the user may select and adjust the timing and frame rate test equipment may be two separate devices : ( 1 ) control unit ( i . e . , frequency ) of the illumination of the shutter timing test and ( 2 ) the GPS receiver and shutter timing test unit as a unit ' s 300 light emitting diodes ( LEDs ) and infrared light single standalone device . Alternatively , another embodiment emitting diodes ( IR LEDs ) . For example , in one embodi - of the video timing test equipment may be two different ment , the user , when using the control unit 400 , may select 55 devices : ( 1 ) the GPS receiver and ( 2 ) the shutter timing test the frame rate , start / end of light integration time , timing of unit and control unit as a single standalone device . the illumination of the LEDs , and the offset timing of the FIG . 2 is an illustration of one embodiment of a shutter illumination of the centermost LED from the vertical video timing test unit as depicted on a video monitor and shows the frame . In various embodiments , the control unit 400 may shutter timing test unit at the beginning of light integration . also allow the user to adjust the resolution timing such as 60 As shown in FIG . 2 , one embodiment of the shutter timing 100 , 10 , and 1 microsecond units . As a result , the control test unit 300 may comprise : a UTC time display 305 , an edge unit 400 may generate and transmit multiple input timing time display 310 , a pulse width display 315 , timing LEDs signals to the shutter timing test unit 300 . 320 , BCD LEDs 325 , timing IR LEDs 330 , BCD IR LEDs
FIG . 1 also shows that the video timing test equipment 335 , a start edge select LED indicator 340 , a start edge select 100 may comprise a shutter timing test unit 300 . The shutter 65 IR LED indicator 345 , an end edge select LED indicator timing test unit 300 may be test equipment , comprising 350 , an end edge select IR LED indicator 355 , a GPS / IRIG LEDs and IR LEDs and may be used to regulate the lock indicator 360 , a timer lock indicator 365 , and a power
US 10 , 091 , 498 B1 12
indicator 370 . Additionally , the timing LEDs 320 may camera ' s light sensor . Thus , unlike the timing LEDs 320 , include : left timing LEDs 321 , a center timing LED 322 , and which are adapted to emit visible light , the timing IR LEDs right timing LEDs 323 . The timing IR LEDs 330 may 330 may be adapted to emit infrared light visible to the include : left timing IR LEDs 331 , a center timing IR LED infrared camera 110 . The timing IR LEDs 330 may include : 332 , and right timing IR LEDs 333 . one or more left timing IR LEDs 331 , a center timing IR
The UTC time display 305 may be one or more alpha LED 332 , and one or more timing IR LEDs 333 and may numeric display devices ( e . g . , seven segment displays ) emit infrared light in a consecutive and successive pattern configured to depict UTC time from 0 . 000 , 000 seconds to based on the positions of each adjacent timing IR LED 330 . 9 . 999 , 999 seconds and may include various time units , such In particular , the shutter timing test unit 300 may generate as seconds , milliseconds , and / or microseconds . Importantly , 10 multiple timing LED output signals , and each timing LED the UTC time display 305 preferably displays a UTC time output signals may correspond with a particular timing IR that is synchronized or locked with the timing of the LED 330 . Importantly , as shown in FIG . 7 , the timing LED illumination of the center timing LED 322 and center timing output signals may each comprise a pulse width waveform IR LED 332 . Thus , when the center timing LED 322 and occurring sequentially and consecutively , such that each center timing IR LED 332 begin illuminating , the UTC time 15 adjacent timing IR LED 330 emits infrared light succes depicted on the UTC time display 305 should match with the sively and adjacently . For example , in one embodiment , the UTC time overlay 335 displayed in the monitor 125 . This shutter timing test unit 300 may emit five timing LED output may depend on whether an LED and IR LED adjacent to the signals , each of which may comprise a pulse width wave center timing LED 322 and center timing IR LED 332 also form in successive timing offsets . Thus , the five LED output illuminate ( i . e . , left timing LED 321a , left timing IR LED 20 signals may then be used to successively illuminate five 331a , right timing LED 323a , right timing IR LED 333a ) . In timing IR LEDs 330 . this manner , the user may verify that the data of the UTC It is important to note that , in preferred embodiments , the time overlay 335 generated from the video synchronizer and sequence of infrared light emissions by the timing IR LEDs time overlay generator 115 matches with the current UTC 330 may be identical to the sequence of visible light emis time and actual time the camera is gathering light , which is 25 sions by the timing LEDs 320 . That way , the UTC time the beginning of light integration . depicted on the UTC time display 305 , reference edge time
The edge time display 310 may be one or more alphanu - value depicted on the edge time display 310 , and pulse width meric display devices ( e . g . , seven segment displays ) con value depicted on the pulse width display 315 may synchro figured to depict an offset time associated with a leading nize with the light emissions of the center timing LED 322 edge or a trailing edge of one or more input timing signals . 30 and center timing IR LED 332 . This offset time may also be synchronized with the illumi - FIG . 2 also shows that the shutter timing test unit 300 may nation of the center timing LED 322 and center timing IR comprise BCD LEDs 325 and BCD IR LEDs 335 . The BCD LED 332 from the vertical frame and may be depicted in LEDs 325 and BCD IR LEDs 335 may be a group of LEDs microseconds . and IR LEDs capable of depicting UTC time in BCD format .
The pulse width display 315 may be one or more alpha - 35 In particular , the BCD LEDs 325 and BCD IR LEDs 335 numeric display devices ( e . g . , seven segment displays ) may depict in BCD format the UTC time displayed on the configured to characterize the length of the pulse width of UTC time display 305 . For example , as shown in FIG . 2 , one or more input timing signals . The pulse width may refer BCD LEDs 325 and BCD IR LEDs 335 may show the UTC to the period of time or duration at which the signal is above time as 1 . 234 , 567 seconds . or below a reference value such as electrical ground and thus 40 The UTC time display 305 , edge time display 310 , and may control the length or duration of the illumination of the pulse width display 315 are generally human readable timing LEDs 320 and timing IR LEDs 330 . FIG . 2 shows devices that must be activated well before the illuminations that , in one embodiment , the pulse width display 315 may of the center timing LED 322 and center timing IR LED 332 . express the pulse width in microseconds . Therefore , the time associated with the illuminations of the
The timing LEDs 320 may be a group of LEDs capable of 45 center timing LED 322 and center timing IR LED 332 may emitting visible light for purposes of measuring the start or be pre - computed and latched into a display driver when the end of light integration of a camera ' s light sensor . The left timing LEDs 321 and left timing IR LEDs 331 are first timing LEDs 320 may include : one or more left timing LEDs lit . In this manner , the BCD LEDs 325 and BCD IR LEDs 321 , a center timing LED 322 , and one or more right timing 335 may then be illuminated and gated onto a bus at the time LEDs 323 and may emit visible light in a consecutive and 50 when the center timing LED 322 and center timing IR LED successive pattern based on the positions of each adjacent 332 are lit . timing LED 320 . In particular , the shutter timing test unit Furthermore , FIG . 2 shows that the shutter timing test unit 300 may generate multiple timing LED output signals , and 300 may comprise a GPS / IRIG lock indicator 360 , a timer each timing LED output signal may correspond to a par - lock indicator 365 , and a power indicator 370 . The GPS / ticular timing LED 320 . Importantly , as shown in FIG . 7 , the 55 IRIG lock indicator 360 may illuminate when an IRIG time timing LED output signals may each comprise a pulse width code signal is applied . The timer lock indicator 365 may waveform , and each pulse width waveform may occur illuminate when the shutter timing test unit 300 is locked to sequentially and consecutively , such that one or more timing a UTC carrier signal . The power indicator 370 may illumi LEDs 320 emit visible light successively and adjacently . For nate to indicate when the shutter timing test unit 300 is on . example , in one embodiment , the shutter timing test unit 300 60 Finally , FIG . 2 shows the shutter timing test unit 300 at may emit five LED output signals , each of which may the beginning or start of light integration . In order to comprise a pulse width waveform in successive timing accurately measure the beginning of light integration , the offsets . Thus , the five LED output signals may then be used user may select the left edge or leading edge of the edge to successively illuminate five timing LEDs 320 . select switch 410 ( shown in FIG . 4 ) , which may be a toggle
Similarly , the timing IR LEDs 330 may also be a group of 65 switch on the control unit 400 . As a result , the UTC time IR LEDs capable of emitting infrared light for purposes of depicted on the UTC time display 305 may be synced to the measuring the start or end of light integration of an infrared moment when the center timing LED 322 and center timing
13 US 10 , 091 , 498 B1
14 IR LED 332 first illuminate . The user may also adjust the through the monitor 125 , the user may be able to measure the other settings on the control unit 400 as shown in FIG . 4 . In beginning , end , and duration of light integration of the particular , the user may adjust the offset time in single camera ( s ) focusing on the shutter timing test unit 300 . microsecond steps until : ( 1 ) the center timing LED 322 and Importantly , FIG . 4 shows that the input timing signals center timing IR LED 332 illuminate ; ( 2 ) the left timing 5 may be adjusted by the user through the use of various LED 321a adjacent to the center timing LED 322 does not toggle switches , buttons , and control knobs . For example , as illuminate , and ( 3 ) the left timing IR LED 331a adjacent to shown in FIG . 4 , one embodiment of the control unit 400 the center timing IR LED 332 does not illuminate . At this may comprise : timing range switches 405 , 415 , an edge time , both the start edge select LED indicator 340 and a start select switch 410 , a pulse width adjustment knob 420 , an edge select IR LED indicator 345 may illuminate , thereby 10 edge and frame rate adjustment knob 425 , and a frame rate confirming that the leading edge of a pulse signal is selected push button 430 . for measuring the start of light integration . The UTC time The pulse width adjustment knob 420 may be a rotary shown in the UTC time display 305 may also be synchro - control knob used to adjust the pulse width of one or more nized to the leading edge of that pulse signal at this time input timing signals in order to increase or reduce the that is , when : ( 1 ) the center timing LED 322 and center 15 on - time lighting period of the LEDs and IR LEDs ( i . e . , timing IR LED 332 illuminate ; ( 2 ) the left timing LED 321a number of microseconds that each timing LED and IR LED adjacent to the center timing LED 322 does not illuminate , remains on ) . Specifically , the rotation of the pulse width and ( 3 ) left timing IR LED 331a adjacent to the center adjustment knob 420 may cause a pulse generator ( not timing IR LED 332 does not illuminate . Thus , as the left shown ) to be adjusted for producing one or more signals timing LED 321a and the left timing IR LED 331a illumi - 20 with a pulse width that preferably extends from the time nate , the UTC time depicted on the UTC time display 305 when light integration begins until the time when light may be stable during the recording for the entire video frame integration ends . Thus , by rotating and adjusting the pulse for any light integration time selected for the camera . width adjustment knob 420 , the amount of time for each
FIG . 3 is an illustration of one embodiment of a shutter LED to remain lit may be shortened or lengthened , as timing test unit as depicted on a video monitor and shows the 25 desired . shutter timing test unit at the end of light integration . In In one implementation , multiple LEDs and IR LEDs may order to measure the end of light integration , the user may illuminate within the field of view of the visible camera 105 select the right edge or trailing edge of the edge select switch and infrared camera 110 . Thus , when a user views the LEDs 410 , which may be a toggle switch on the control unit 400 . and IR LEDs of the shutter timing test unit 300 through the As a result , the UTC time depicted on the UTC time display 30 monitor 125 , the user may measure the duration of light 305 may be synced to the time when the center timing LED integration time simply by adjusting the pulse width adjust 322 and center timing IR LED 332 stops illuminating . The ment knob 420 until the on - time lighting period of the LEDs user may also adjust the settings on the control unit 400 as and / or displays is synchronized with the camera ' s sensor shown in FIG . 5 . In particular , the user may adjust the offset shutter time . This may occur when ( 1 ) the center timing LED time in single microsecond steps until : ( 1 ) the center timing 35 322 and center timing IR LED 332 illuminate and ( 2 ) the LED 322 and center timing IR LED 332 illuminate ; ( 2 ) the LEDs adjacent to the center timing LED 322 and center right timing LED 323a adjacent to the center timing LED timing IR LED 332 does not illuminate ( e . g . , left timing 322 does not illuminate , and ( 3 ) right timing IR LED 333a LED 321a , left timing IR LED 331a , right timing LED adjacent to the center timing IR LED 332 does not illumi - 323a , right timing IR LED 333a ) . Once the pulse width nate . At this time , both the end edge select LED indicator 40 adjustment knob 420 is calibrated to have the LEDs illu 350 and end edge select IR LED indicator 355 may illumi - mination synchronized with the camera ' s sensor shutter nate , thereby confirming that the trailing edge of a pulse time , the user may read the pulse width display 315 to signal is selected for the measurement of the end of light measure the duration of light integration time . As such , the integration . The UTC time shown in the UTC time display pulse width adjustment knob 420 may be used to measure 305 may also be synchronized to the trailing edge of that 45 the duration of light integration time to the nearest micro pulse signal at this time — that is , when : ( 1 ) the center timing second . LED 322 and center timing IR LED 332 illuminate ; ( 2 ) the Similarly , the edge and frame rate adjustment knob 425 right timing LED 323a adjacent to the center timing LED may also be a rotary control knob used to adjust the timing 322 does not illuminate , and ( 3 ) right timing IR LED 333a of a signal edge ( i . e . , leading edge , trailing edge ) for one or adjacent to the center timing IR LED 332 does not illumi - 50 more input timing signals . Specifically , by rotating the edge nate . Thus , as the right timing LED 323a and the right and frame rate adjustment knob 425 , the offset time of a timing IR LED 333a illuminate , the UTC time depicted on leading edge or trailing edge of a pulse signal may shift the UTC time display 305 may be stable during the record - earlier or later , as desired . In this manner , a user may ing for the entire video frame for any light integration time advance or delay the timing of that signal edge relative to the selected for the camera . 55 camera ' s vertical synchronization signal 116 in order to
FIG . 4 is an illustration of one embodiment of a control measure the beginning or end of light integration time of a unit and shows how the settings of the control unit would be camera ' s shutter sensor . adjusted in order to measure the start of light integration . As In one implementation , multiple timing LEDs 320 and discussed above , the control unit 400 may be configured to timing IR LEDs 330 may light consecutively and in suc send input timing signals to the shutter timing test unit 300 . 60 cession within the field of view of the visible camera 105 In this manner , the user may adjust the timing and frame rate and / or infrared camera 110 . Thus , when a user views the ( i . e . , frequency ) of the illumination of the LEDs ( i . e . , timing illumination of the timing LEDs 320 and timing IR LEDs LEDs 320 , BCD LEDs 325 , timing IR LEDs 330 , BCD IR 330 through the monitor 125 , light integration time may be LEDs 335 ) and displays ( i . e . , UTC time display 305 , edge measured by aligning the illumination of the LEDs with the time display 310 , pulse width display 315 ) . Thus , by ( 1 ) 65 centermost LED ( i . e . , the center timing LED 322 and center adjusting the timing and frequency of the illumination of the timing IR LED 332 ) . This is due to the fact that , as recited LEDs and displays and ( 2 ) viewing the LEDs and displays above , the UTC time shown in the UTC time display 305
15 US 10 , 091 , 498 B1
16 and the offset time shown in the edge time display 310 are leading edge of the pulse signal is selected for the measure preferably synchronized with the center timing LED 322 and ment of the beginning of light integration . center timing IR LED 332 . As a result , the beginning or end Additionally , in order to accurately measure the exact of light integration time may be accurately measured by moment when light integration begins ( i . e . , noting the UTC adjusting the edge and frame rate adjustment knob 425 until 5 time shown in the UTC time display 305 and the offset time at least when the center timing LED 322 and center timing shown in the edge time display 310 ) , the user may also IR LED 332 illuminate . For instance , a user may measure adjust the offset time in single microsecond incremental the beginning of light integration by : ( 1 ) aligning the leading steps until the illumination of the left timing LED 321a
( adjacent to the center timing LED 322 ) and left timing IR edge of the pulse signal with the illumination of the center timing LED 322 and center timing IR LED 332 and ( 2 ) 10 LED 331a ( adjacent to the center timing IR LED 332 )
extinguishes . The UTC time shown on the UTC time display extinguishing the illumination of the left timing LED 321a 305 may be synchronized with the timing at the beginning and left timing IR LED 331a . On the other hand , when of illumination of the center timing LED 322 and center measuring the end of light integration time , a user may : ( 1 ) timing IR LED 332 , thereby indicating the beginning of light align the trailing edge of the pulse signal with the illumi - 16 15 integration time . In a preferred embodiment , the UTC time nation of the center timing LED 322 and center timing IR shown in the UTC time display 305 may be stable through LED 332 and ( 2 ) extinguishing the illumination of the right out the recording for the entire video frame for any light timing LED 323a and right timing IR LED 333a . integration time selected for the camera .
Importantly , upon activating the frame rate push button FIG . 5 is an illustration of one embodiment of a control 430 , a user may also adjust the frequency of the illumination 20 unit and shows how the settings of the control unit would be when adjusting the edge and frame rate adjustment knob adjusted in order to measure the end of light integration . As 425 . This may allow a user to measure the frame rate of the shown in FIG . 5 , one embodiment of the control unit 400 camera under test . By way of example , in order to measure may comprise : timing range toggle switches 405 , 415 , an the frame rate of the camera , the user may actuate the frame edge select toggle switch 410 , a pulse width adjustment rate push button 430 and adjust the edge and frame rate 25 knob 420 , an edge and frame rate adjustment knob 425 , and adjustment knob 425 until the user is able to read the a frame rate push button 430 . In order to measure the end of numerical values on the UTC time display 305 , edge time light integration , a user may adjust the settings on the control display 310 , or pulse width display 315 . unit 400 , as shown in FIG . 5 . Specifically , a user may begin
In an embodiment , the shutter timing test unit 300 may be configuring the video timing test equipment 100 for mea configured to enter into a default timing setting affecting the 30 suring the end of light integration by selecting the right edge LEDs ' and IR LEDs ' on - time duration whenever the frame or trailing edge of the edge select switch 410 . As a result , the rate push button 430 is actuated . This may allow the LEDs end edge select LED indicator 350 and end edge select IR and IR LEDs ' on - time illumination to cover the entire LED indicator 355 may illuminate , thereby confirming that duration for a single vertical frame . In this manner , the the trailing edge of the pulse signal is selected for the on - time duration of at least one LED and IR LED may be 35 measurement of the end of light integration . activated , and the user may be able to quickly locate when Additionally , in order to accurately measure the exact light integration time occurs in the video frame . In particu moment when light integration ends ( i . e . , noting the UTC lar , when viewing the LEDs or IR LEDs through the monitor time shown in the UTC time display 305 and the offset time 125 , the user can simply view the LEDs and IR LEDs of the shown in the edge time display 310 ) , the user may also shutter timing test unit 300 and adjust the offset and on - time 40 adjust the offset time in single microsecond incremental illumination to move the first / last LED / IR LED towards the steps until the illumination of the right timing LED 323a center LED / IR LED . ( adjacent to the center timing LED 322 ) and right timing IR
The edge select switch 410 may be a toggle switch used LED 333a ( adjacent to the center timing IR LED 332 ) to select between a leading edge or trailing edge of the pulse extinguishes . As discussed above , the UTC time shown on signal , and thus , may be used to select the start time or end 45 the UTC time display 305 may be synchronized with the time of light integration mode . timing at the end of illumination of the center timing LED
The timing range switches 405 , 415 may be switches or 322 and center timing IR LED 332 , thereby indicating the control knobs used to adjust the resolution or units of end of light integration time . In a preferred embodiment , the measure for the pulse width adjustment knob 420 or edge UTC time shown in the UTC time display 305 may be stable and frame rate adjustment knob 425 . The timing range 50 throughout the recording for the entire video frame for any switches 405 , 415 may also be used to adjust the frequency light integration time selected for the camera . at which the LEDs , IR LEDs , and displays illuminate FIG . 6 is a block diagram of the video timing test consecutively . For instance , as shown in FIG . 4 , one equipment according to various embodiments of the present embodiment of the timing range switch 415 may have three disclosure . As shown in FIG . 6 , one embodiment of the adjustable positions ( i . e . , 100 , 10 , and 1 microseconds ) . This 55 video timing test equipment 100 may comprise : a shutter may allow the user to adjust the resolution or units of timing test source 300 and control unit 400 . FIG . 6 also measure of the pulse width adjustment knob 420 or edge and shows that the shutter timing test source 300 may also frame rate adjustment knob 425 to either 100 , 10 , or 1 comprise : a UTC timing logic module 605 , user input and microseconds . display module 610 , and an LED and UTC output module
More importantly , in order to measure the start of light 60 615 . integration , a user may adjust the settings on the control unit The UTC timing logic module 605 may be one or more as shown in FIG . 4 . Specifically , a user may configure the components or devices configured to generate a current UTC video timing test equipment 100 to measure the beginning of time signal 616 representing the current time in UTC format . light integration by selecting the left edge or leading edge of In one implementation , the UTC timing logic module 605 the edge select switch 410 . As a result , both the start edge 65 may comprise : a set UTC time logic 606 , an adjustment select LED indicator 340 and a start edge select IR LED register 607 , and a UTC time counter 608 . The set UTC time indicator 345 may illuminate , thereby confirming that the logic 606 may be an interface logic configured to receive
17 US 10 , 091 , 498 B1
18 GPS signals ( i . e . , a one pulse per second ( 1PPS ) GPS signal which is preferably at the end of integration time ( i . e . , 602 ( e . g . , L1 signal ) and GPS UTC time message 603 ) from trailing edge ) . The pulse width display 315 may show a a typical GPS receiver 200 , shown in FIG . 1 . The set UTC pulse width time value , indicating the duration at which each time logic 606 may also be configured determine the UTC of the timing LEDs 320 and timing IR LEDs 3305 illumi time and provide the following outputs : ( 1 ) the 1PPS GPS 5 nate . signal 602 to the UTC time counter 608 and ( 2 ) the GPS In one embodiment , the edge time display 310 may depict UTC time message 603 to the adjustment register 607 . In the edge time or offset time in microseconds . Similarly , the this manner , the adjustment register 607 may latch the UTC pulse width display 315 may also depict the pulse width time time message 603 and output the adjusted UTC set time in microseconds . signal 604 , which may be a delay in UTC time to the nearest 10 The user input display logic 611 may also output various microsecond due to propagation delay . The adjusted UTC timing signals readable by the timing logic 612 , including : set time signal 604 may then increment the UTC time an edge selected signal 661 , edge time signal 662 , pulse counter 608 to generate the current UTC time signal 616 , width signal 663 , and frame rate signal 664 . The function which may be synchronized with the 1PPS signal 602 . In ality of these timing signals may be similar to the input various embodiments , a clock signal 609 may also be 15 timing signals received from the control unit 400 and are aligned to the 1PPS signal 602 for correction and improve described below in Table 2 . ment towards timing accuracy .
FIG . 6 also shows that the shutter timing test source 300 TABLE 2 may also comprise a user input and display module 610 . The to 20 Pulse Width Signal Includes information regarding length user input and display module 610 may be configured to 20 of the pulse width of a signal receive input timing signals from the control unit 400 and Edge Time Signal Includes offset time information for the leading may display some of the user inputs via the edge time edge or trailing edge of a pulse signal display 310 and pulse width display 315 . Importantly , the Edge Selected Signal Includes information regarding whether leading user input and display module 610 may also be configured edge or trailing edge of a pulse signal is selected
25 Frame Rate Signal Includes information regarding frequency of the to generate a pulse width signal 614 and a first timing LED illumination for the LEDs and displays start time signal 613 based on the input timing signals . As recited above , the pulse width signal 614 may control the length or duration of the on - time lighting or illumination of Using the above timing signals shown in Table 2 and the each timing LED 320 and timing IR LED 330 . The first current UTC time signal 616 generated by the UTC timing timing LED start time signal 613 may transmit LED start 30 * 30 module 605 , the timing logic 612 of the user input and
display module 610 may generate : ( 1 ) a first timing LED time information to the LED and UTC output module 615 for controlling the illumination of the timing LEDs 320 and start time signal 613 , ( 2 ) a pulse width signal 614 , and ( 3 ) timing IR LEDs 330 . a center timing LED UTC time matching signal 633 . As By way of example , one embodiment of the user input and recited above , the pulse width signal 614 may transmit
35 information regarding the duration of the on - time lighting of display module 610 may comprise a user input display logic » 611 and timing logic 612 . The user input display logic 611 the LEDs , IR LEDs , and displays ( i . e . , duration of light may receive from the control unit 400 various input timing integration ) . The first timing LED start time signal 613 may signals configurable by the user . Examples of such input include information regarding the illumination of the first
LED from a series of multiple timing LEDs 320 and timing timing signals may include , without limitation , an incre mented / decremented pulse width signal 651 , incremented / 4 | 40 IR LEDs 330 . This first timing LED start time signal 613 can
also be used to help determine the on - time lighting periods decremented edge time signal 652 , start / stop select signal 653 , and increment / decrement frame rate signal 654 . A for the remaining timing LEDs 320 and timing IR LEDs
330 . The center timing LED UTC time matching signal 633 summary of the functions for these input timing signals are described below in Table 1 . may include UTC timing information for the start / end of
45 light integration of the center timing LED 322 and the center TABLE 1 timing IR LED 332 . The center timing LED UTC time
matching signal 633 may also be generated based on the Incremented / Decremented Controls length of pulse width of a signal current UTC time signal 616 derived from the UTC timing Pulse Width Signal logic module 605 in order to display the start or end of light Incremented / Decremented Controls offset time of the leading 50 integration in UTC time . Edge Time Signal edge / trailing edge of a pulse signal Start / Stop Select Signal Selects between leading edge / trailing edge FIG . 6 also shows that the shutter timing test source 300
of a pulse signal may also comprise an LED and UTC output module 615 . Increment / Decrement Frame Controls frequency of illumination for the The LED and UTC output module 615 may be configured to Rate Signal LEDs and displays illuminate the timing LEDs 320 , BCD LEDs 325 , timing IR
55 LEDs 330 , and BCD IR LEDs 335 for purposes of deter Upon receiving these input timing signals , the user input mining the beginning or end of light integration of a camera
display logic 611 may show these user input values on the under test . The LED and UTC output module 615 may also edge time display 310 and pulse width display 315 . Spe regulate the illumination of these LEDs and IR LEDs at cifically , the edge time display 310 may depict the edge time various time intervals , based on various input signals such as or offset time at which the illumination of the timing LEDs 60 the clock signal 609 , current UTC time signal 616 , first 320 and timing IR LEDs 330 begins or ends . In particular , timing LED start time signal 613 , and pulse width signal the edge time display 310 may depict the offset time at 614 . which the timing LEDs 320 and timing IR LEDs 330 begin Importantly , the LED and UTC output module 615 may to illuminate , which is preferably at the start of integration also be configured to show UTC time in the UTC time time ( i . e . , the leading edge ) . Alternatively , the edge time 65 display 305 . In a preferred embodiment , the displayed UTC display 310 may also depict the offset time at which the time on the UTC time display 305 may be synchronized with timing LEDs 320 and timing IR LEDs 330 stop illuminating , the illumination of the center timing LED 322 and the center
US 10 , 091 , 498 B1 19 20
timing IR LED 332 . In this manner , the UTC time displayed timing LED 322 and the center timing IR LED 332 illumi on the UTC time display 305 represents the offset time for nate . This will allow the user to verify the time stamp the leading edge or trailing edge of the center timing LED inserted in the video data by matching the UTC time when output signal , which may control the illumination of the light integration occurs . In one embodiment , the BCD LEDs center timing LED 322 and the center timing IR LED 332 . 5 325 and BCD IR LEDs 335 may be grouped into four LEDs
By way of example , one embodiment of the LED and per group as 4 - bit LEDs , as shown in FIGS . 2 and 3 . UTC output module 615 may comprise a comparator 617 , an In various embodiments , the UTC time display 305 , edge output controller 618 , and a UTC time display 305 . The time display 310 , and / or pulse width display 315 may comparator 617 may receive both the current UTC time comprise one or more seven segment displays . For instance , signal 616 and the first timing LED start time signal 613 and 10 in one embodiment shown in FIGS . 2 and 3 , the UTC time may generate , based on these two signals , a start output display 305 may comprise seven segment digital displays signal 619 for the output controller 618 . The start output i . e . , a single seven segment digital display for displaying a signal 619 may transmit timing information as to when the second unit of time ( i . e . , a first seven segment digital timing LEDs 320 and timing IR LEDs 330 begin or stop display ) , three seven segment digital displays capable of illuminating . In particular , when the leading edge of the edge 15 displaying a millisecond unit of time ( i . e . , a second , third , select toggle switch 410 of the control unit 400 is selected , and fourth seven segment digital display ) , and three addi the start output signal 619 may transmit UTC timing infor - tional seven segment digital displays capable of depicting a mation as to the time when the timing LEDs 320 and timing microsecond unit of time ( i . e . , a fifth , sixth , and seventh IR LEDs 330 begin illuminating ( i . e . , beginning of light seven segment digital displays ) . integration , leading edge of pulse signal ) . Alternatively , 20 FIGS . 7A and 7B are illustrations of some embodiments when the trailing edge of the edge select toggle switch 410 of the timing LEDs , timing IR LEDs , and timing LED output is selected , the start output signal 619 may transmit UTC signals and show the timing relationship of these timing timing information as to the time when the timing LEDs 320 LEDs , timing IR LEDs , and timing LED output signals . and timing IR LEDs 330 stop illuminating ( i . e . , end of light Specifically , FIG . 7A shows the timing LEDs 320 , including : integration , trailing edge of pulse signal ) . 25 left timing LEDs 321a , 321b , center timing LED 322 , and
In addition to the start output signal 619 , the output right timing LEDs 323a , 323b . Left timing LED 321a and controller 618 may also receive the pulse width signal 614 right timing LED 323a are adjacent to center timing LED from the timing logic 612 . Given the pulse width signal 614 322 . and the start output signal 619 , the output controller 618 may FIG . 7A also shows the timing IR LEDs 330 , including : be able to determine the offset times or start times for 30 the left timing IR LEDs 331a , 331b , center timing IR LED illuminating one or more timing LEDs 320 and timing IR 332 , and right timing IR LEDs 333a , 333b . Left timing IR LEDs 330 . As a result , the output controller 618 may also LED 33la and right timing IR LED 333a are adjacent to generate multiple timing LED output signals 631 to regulate center timing LED 332 . the illumination of one or more timing LEDs 320 and timing Finally , FIG . 7B shows the timing LED output signals IR LEDs 330 . In this manner , each timing LED output signal 35 701 , 702 , 703 , 704 , 705 . 631 may comprise a pulse waveform that follows consecu - FIGS . 7A and 7B show one embodiment of the timing tively and sequentially from one another ( as shown in FIG . relationship for the timing LEDs 320 , timing IR LEDs 330 , 7 ) , such that the leading edge of each timing LED output and timing LED output signals 701 , 702 , 703 , 704 , 705 . First signal may be aligned with the trailing edge of the preceding of all , when a user adjusts the settings of the control unit 400 timing LED output signal . To help increase correction and 40 to match the light integration time of a camera with the timing accuracy for the timing LED output signals 631 , a illumination of the center timing LED 322 and center timing clock signal 609 may also be used in conjunction with the IR LED 332 , timing LED output signal 701 may correspond output controller 618 . with the illumination of first left timing LED 321b and first
FIG . 6 also shows that both the timing logic 612 and the left timing IR LEDs 331b . Additionally , timing LED output output controller 618 are in communication with the UTC 45 signal 702 may correspond with the illumination of the time display 305 . Here , the timing logic 612 may transmit to second left timing LED 321a and second left timing IR LED the UTC time display 305 a center LED UTC time matching 331a while center timing LED output signal 703 may signal 633 , which may carry UTC time information syn - correspond with the illumination of center timing LED 322 chronized with the leading edge or trailing edge of the center and center timing IR LED 332 . Timing LED output signal timing LED output signal for the center timing LED 322 and 50 704 may correspond with the illumination of first right the center timing IR LED 332 . Additionally , the output timing LED 323a and first right timing IR LED 333a , and controller 618 may transmit a center LED on signal 632 to timing LED output signal 705 may correspond with the activate the UTC time display 305 whenever the center illumination of second right timing LED 323b and second timing LED 322 and the center timing IR LED 332 illumi right timing IR LED 333b . Although FIG . 7B shows five nate . In this manner , using the timing logic 612 and output 55 timing LED output signals , additional timing LED output controller 618 , the UTC time display 305 may depict the signals may be used without deviating from the scope of UTC time when the center timing LED 322 and the center disclosure . timing IR LED 332 begin to illuminate ( i . e . , start of light Importantly , FIG . 7B shows that the offset times of the integration ) or stops illuminating ( i . e . , end of light integra - pulse waveforms for each timing LED output signals 701 , tion ) . 60 702 , 703 , 704 , 705 may occur sequentially and successively ,
FIG . 6 also shows that the output controller 618 may be such that the timing LEDs 320 and timing IR LEDs 330 in communication with the BCD LEDs 325 and BCD IR illuminate in a consecutive manner . In particular , the leading LEDs 335 . As recited above , the BCD LEDs 325 and BCD and trailing ends of the pulse waveforms for each timing IR LEDs 335 may be configured to illuminate the UTC time LED output signals 701 , 702 , 703 , 704 , 705 may align with value shown in the UTC time display 305 in BCD format . 65 one another successively . In this manner , the timing LED In other words , the BCD LEDs 325 and BCD IR LEDs 335 output signals 701 , 702 , 703 , 704 , 705 may illuminate the may display in BCD format the UTC time when the center timing LEDs 320 and timing IR LEDs 330 in sequential
US 10 , 091 , 498 B1 21
order . By way of example , as shown in FIGS . 7A and 7B , or more embodiments may be practiced in combination or timing LED output signal 701 may include a pulse width conjunction with one another . Furthermore , the reference or waveform that begins illuminating the first left timing LED non - reference to a particular embodiment shall not be inter 321b and first left timing IR LEDs 331b . At the trailing end preted to limit the scope of protection . It is intended that the of the pulse width waveform of timing LED output signal 5 scope of protection not be limited by this detailed descrip 701 , the pulse width waveform of timing LED output signal tion , but by the claims and the equivalents to the claims that 702 may begin to illuminate the second left timing LED are appended hereto . 321a and second left timing IR LED 331a . At the trailing E xcept as stated immediately above , nothing which has end of the pulse width waveform of timing LED output been stated or illustrated is intended or should be interpreted signal 702 , center timing LED output signal 703 may then 10 to cause a dedication of any component , step , feature , object , begin illuminating the center timing LED 322 and center benefit , advantage , or equivalent to the public , regardless of timing IR LED 332 . Timing LED output signal 704 may whether it is or is not recited in the claims . The scope of then illuminate the first right timing LED 323a and first right protection is limited solely by the claims that now follow , timing IR LED 333a thereafter . Finally , timing LED output and that scope is intended to be broad as is reasonably signal 705 may illuminate the second right timing LED 323b 15 consistent with the language that is used in the claims . The and second right timing IR LED 333b . scope of protection is also intended to be broad to encom
In one implementation , adjusting the offset time to illu pass all structural and functional equivalents . minate the center timing LED 322 and center timing IR LED 332 may be configured by the user to indicate either the start What is claimed as new and desired to be protected by of integration time or the end of integration time . Here , as 20 Letters Patent is set forth in the appended claims : the trailing edge 709b of timing LED output signal 702 1 . A video timing test equipment for measuring light completes illuminating first left timing LED 321b and first integration time of a camera under test , comprising : left timing IR LEDs 3316 , the leading edge 710a of center a control unit capable of generating a plurality of input timing LED output signal 703 may begin to illuminate the timing signals adjustable by a user ; and center timing LED 322 and center timing IR LED 332 . At 25 a shutter timing test unit operatively coupled to said this time , light integration begins , and the user may note the control unit , said shutter timing test unit comprising : UTC time on the UTC time display 305 if the leading edge a plurality of timing light emitting diodes ( LEDs ) , is selected . Conversely , as the trailing edge 710b of center including : at least one left timing LED , a center timing LED output signal 703 completes the illumination of timing LED , and at least one right timing LED ; and the center timing LED 322 and center timing IR LED 332 , 30 an output controller capable of regulating an illumina the leading edge 711a of timing LED output signal 704 may tion of said plurality of timing LEDs by generating begin to illuminate the first right timing LED 323a and first a plurality of timing LED output signals , each having right timing IR LED 333a . At this time , light integration an offset time occurring sequentially and corre ends and the user may note the UTC time on the UTC time sponding to an associated one of said plurality of display 305 if the trailing edge is selected . As such , the UTC 35 timing LEDs ; time on the UTC time display 305 may indicate when both wherein said plurality of timing LED output signals are the center timing LED 322 and center timing IR LED 332 adjusted by said user based on said plurality of input began illuminating at the start of integration time and may timing signals ; display the UTC time when the center timing LED 322 and wherein said plurality of timing LED output signals center timing IR LED 332 stops illumination at the end of 40 include a center timing LED output signal associated integration time . The pulse width display 315 may indicate with said illumination of said center timing LED ; the length of time each of the timing LEDs 320 and timing and IR LEDs 330 begin illuminating . wherein said output controller is configured to :
While the foregoing written description enables one of i ) illuminate said center timing LED based on said ordinary skill to make and use what is considered presently 45 offset time of said center timing LED output signal ; to be the best mode thereof , those of ordinary skill will ii ) illuminate said at least one left timing LED before understand and appreciate the existence of variations , com said illumination of said center timing LED ; and binations , and equivalents of the specific embodiment , iii ) illuminate said at least one right timing LED after method , and examples herein . The components , steps , fea said illumination of said center timing LED . tures , objects , benefits , and advantages that have been dis - 50 2 . The video timing test equipment according to claim 1 , cussed are merely illustrative , and none of them , nor the wherein said shutter timing test unit further comprises ; discussions relating to them , are intended to limit the scope a coordinated universal time ( UTC ) time display in com of protection in any way . Numerous other embodiments are munication with said output controller ; also contemplated , including embodiments that have fewer , a UTC timing module capable of generating a current additional , and / or different components , steps features , 55 UTC time signal ; and objects , benefits , and advantages . The components and steps a timing logic capable of generating a center timing LED may also be arranged and ordered differently . UTC time matching signal based on said current UTC
The foregoing description of the preferred embodiment time signal and said plurality of input timing signals ; has been presented for the purposes of illustration and wherein said output controller is capable of displaying on description . While multiple embodiments are disclosed , still 60 said UTC time display a UTC time based on said center other embodiments will become apparent to those skilled in timing LED UTC time matching signal , said UTC time the art from the above detailed description . As will be corresponding to a UTC start time or a UTC end time realized , the scope of protection is capable of modifications of said light integration . in various obvious aspects , all without departing from the 3 . The video timing test equipment , according to claim 2 , spirit and scope of the present disclosure . Accordingly , the 65 wherein said shutter timing test unit further comprises : detailed description is to be regarded as illustrative in nature a plurality of binary coded decimal ( BCD ) LEDs in and not restrictive . Also , although not explicitly recited , one communication with said output controller ; and
US 10 , 091 , 498 B1 23 24
wherein said output controller is capable of displaying an output controller capable of regulating an illumina said UTC time in BCD format with said plurality of tion of said plurality of timing LEDs by generating BCD LEDs . a plurality of timing LED output signals , each having
4 . The video timing test equipment , according to claim 3 , an offset time increasing successively and corre wherein said shutter timing test unit further comprises : sponding to an associated one of said plurality of
a plurality of BCD infrared light emitting diodes ( IR timing LEDs , said plurality of timing LED output LEDs ) in communication with said output controller ; signals being adjusted based on said plurality of wherein said output controller is capable of displaying input timing signals ; said UTC time in BCD format with said plurality of positioning said shutter timing test unit in view of a BCD IR LEDs .
5 . The video timing test equipment according to claim 1 , camera under test , such that , a monitor in video com munication with said camera under test displays a video wherein said shutter timing test unit further comprises :
a user input display logic ; and image of said timing LEDs of said shutter timing test an edge time display in communication with said user unit ;
input display logic ; 15 adjusting said toggle switch of said control unit to select wherein said user input display logic is capable of dis said start of light integration ; and
playing said offset time of said center timing LED on while viewing said timing LEDs on said monitor , adjust said edge time display based on said plurality of input ing said at least one control knob of said control unit timing signals . until said at least one left timing LED stops illuminat
6 . The video timing test equipment according to claim 5 , 20 ing and said center timing LED illuminates in order to wherein said shutter timing test unit further comprises : measure said start of said light integration .
a pulse width display in communication with said user 10 . The method for measuring light integration time of input display logic ; claim 9 , wherein said plurality of timing LED output signals
wherein said user input display logic is capable of dis - includes a center timing LED output signal associated with playing a pulse width time on said pulse width display 25 said illumination of said center timing LED ; and based on said plurality of input timing signals . wherein said output controller is configured to :
7 . The video timing test equipment , according to claim 1 , i ) illuminate said center timing LED based on said offset wherein said shutter timing test unit further comprises : time of said center timing LED output signal ;
a plurality of timing IR LEDs , including at least one left ii ) illuminate said at least one left timing LED before said timing IR LED , a center timing IR LED , and at least 30 illumination of said center timing LED ; and one right timing IR LED ; iii ) illuminate said at least one right timing LED after said
wherein said output controller is capable of regulating an illumination of said center timing LED . illumination of said plurality of timing IR LEDs based 11 . The method for measuring light integration time of on said plurality of timing LED output signals , such claim 9 , further comprising the steps : that said output controller is configured to : 35 adjusting said toggle switch of said control unit to select i ) illuminate said center timing IR LED based on said said end of said light integration ; and
offset time of said center timing LED output signal ; while viewing said timing LEDs on said monitor , adjust ii ) illuminate said at least one left timing IR LED before ing said at least one control knob of said control unit
said illumination of said center timing IR LED ; and until said at least said center timing LED illuminates iii ) illuminate said at least one right timing IR LED 40 and said at least one right timing LED stops illuminat
after said illumination of said center timing IR LED . ing in order to determine said end of light integration . 8 . The video timing test equipment of claim 1 , wherein 12 . The method for measuring light integration time of
said control unit comprises a toggle switch movable between claim 9 , wherein said shutter timing test unit further com a start position and an end position , said start position being prises a UTC time display ; associated with a leading edge of said center timing LED 45 wherein said UTC time display depicts a UTC start time output signal and said end position being associated with a when selecting said start of said light integration with trailing edge of said center timing LED output signal , such said control unit ; and that said start position corresponds to a start of light inte wherein said method further comprising the steps : gration and said end position corresponds to an end of said adjusting said toggle switch of said control unit to light integration . select said start of light integration , and
9 . A method for measuring light integration time of a verifying that a UTC time overlay displayed on said camera under test with a video timing test equipment , monitor and generated by said camera under test is comprising : substantially identical to said UTC start time
providing a video timing test equipment , comprising : a depicted on said UTC time display of said shutter control unit and a shutter timing test unit ; 55 timing test unit .
wherein said control unit is capable of generating a 13 . The method for measuring light integration time of plurality of input timing signals adjustable by a user claim 12 , wherein said UTC time display depicts a UTC end and comprises : ( 1 ) a toggle switch selectable between time when selecting said end of light integration with said a start of light integration and an end of light integration control unit ; and and ( 2 ) at least one rotary control knob adjustable for 60 wherein said method further comprising the steps : an offset time of said start and said end of light adjusting said toggle switch of said control unit to integration ; select said end of light integration , and
wherein said shutter timing test unit is operatively verifying that a UTC time overlay displayed on said coupled to said control unit and comprises : monitor and generated by said camera under test is a plurality of timing LEDs , including : at least one left 65 substantially identical to said UTC end time depicted
timing LED , a center timing LED , and at least one on said UTC time display of said shutter timing test right timing LED ; and unit .
50
US 10 , 091 , 498 B1 25 26
5
14 . A method for measuring light integration time of an infrared ( IR ) camera under test with a video timing test equipment , comprising :
providing a video timing test equipment comprising : a control unit and a shutter timing test unit ;
wherein said control unit is capable of generating a plurality of input timing signals adjustable by a user
ises : ( 1 ) a toggle switch selectable between a start of light integration and an end of light integration and ( 2 ) at least one rotary control knob adjustable for an offset time of said start and said end of light integration ;
wherein said shutter timing test unit is operatively coupled to said control unit and comprises : 15 a plurality of timing IR LEDs , including : at least one
left timing IR LED , a center timing IR LED , and at least one right timing IR LED ; and
an output controller capable of regulating an illumina - tion of said plurality of timing IR LEDs by gener - 20 ating a plurality of timing LEE ) output signals , each having an offset time increasing successively and corresponding to an associated one of said plurality of timing IR LEDs , said plurality of timing LED output signals being adjusted based on said plurality 25 of input timing signals ;
positioning said shutter timing test unit in view of an IR camera under test , such that , a monitor in video com munication with said IR camera under test displays a video image of said timing IR LEDs of said shutter 30 timing test unit ;
adjusting said toggle switch of said control unit to select said start of light integration ; and
while viewing said timing IR LEDs on said monitor , adjusting said at least one control knob of said control 35 35 unit until said at least one left timing IR LED stops illuminating and said center timing IR LED illuminates in order to measure said start of said light integration .
15 . The method for measuring light integration time of claim 14 , wherein said plurality of timing LED output 40 signals includes a center timing LED output signal associ ated with said illumination of said center timing IR LED ; and
wherein said output controller is configured to : i ) illuminate said center timing IR LED based on said
offset time of said center timing LED output signal ; ii ) illuminate said at least one left timing IR LED before
said illumination of said center timing LED ; and iii ) illuminate said at least one right timing IR LED after
said illumination of said center timing LED . 16 . The method for measuring light integration time of
claim 14 , further comprising the steps : adjusting said toggle switch of said control unit to select
said end of said light integration ; and while viewing said timing IR LEDs on said monitor ,
adjusting said at least one control knob of said control unit until said at least said center timing IR LED illuminates and said at least one right timing IR LED stops illuminating in order to determine said end of light integration .
17 . The method for measuring light integration time of claim 14 , wherein said shutter timing test unit further comprises a UTC time display ;
wherein said UTC time display depicts a UTC start time when selecting said start of said light integration with said control unit ; and
wherein said method further comprising the steps : adjusting said toggle switch of said control unit to
select said start of light integration ; and verifying that a UTC time overlay displayed on said monitor and generated by said IR camera under test is substantially identical to said UTC start time depicted on said UTC time display of said shutter timing test unit .
18 . The method for measuring light integration time of claim 17 , wherein said UTC time display depicts a UTC end time when selecting said end of light integration with said control unit ; and
wherein said method further comprising the steps : adjusting said toggle switch of said control unit to
select said end of light integration , and verifying that a UTC time overlay displayed on said monitor and generated by said IR camera under test is substantially identical to said UTC end time depicted on said UTC time display of said shutter timing test unit .
