Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Bosch Security Systems Academy
CCTV SYSTEMS
(DUBAI - UAE)
Module 1 - Lenses
BREAK
Digital BasicsVideo CompressionH.264 and ONVIFLUNCH BREAK
NetworksNetwork AddressesNetwork Transmission MediumNetwork PitfallsConfidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Day 1 Outline
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Characteristics of the Lens
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Consider the following parameters:
Focal LengthField of ViewDepth of FieldOptical QualityF-stop (aperture) RangeType of Iris ControlI.R. Correction in LensC or CS mount Camera Sensor FormatChoosing the Correct Lens
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Distance between optical center of the lens and the sensorDetermines how much magnification a lens provides Measured in millimeters (e.g. 3.7mm, 9mm, 50mm) Relates directly to the field of viewShort focal length provides wide angle of viewLong focal length provides telephoto viewFocal Length
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Is the scene width (W), scene height (H) as seen bythe camera at distance (D) between camera and scene.
The following factors determine the focal lengththat must be used to obtain Field of view:
Size of the scene to be viewedDistance between the scene and the cameraCamera image sensor sizeField of view can be calculated with a lens wheel or a calculation programField of View
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Lens has a maximum and minimum apertureand this specifies the range of light it can suppress
Lowest F-stop: iris is fully openHighest F-stop: iris at minimum openingF-stop (Aperture) Range
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
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Area within the field of view which appears in focusIs influenced by several factors:Wide angle lens has a better Depth of Field than telephoto lensHigher F-stop setting -> better Depth of Field Auto-iris lenses provide optimum Depth of FieldDepth of Field
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Manual - Iris (manually controllable)DC - Iris (controlled by camera)Video - Iris (controlled in lens)Vari - focus (iris,focus)Video - Iris Zoom (+ zoom control)Types of Iris Control
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Central Video Level Control
digital
level control
pre-amp
proc.+ detector
video iris driver
shutter timer
built-in electronics
Video
Video-Iris Lens (with built-in electronics)
Types of Iris Control
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Central Video Level Control
digital
level control
pre-amp
proc.+ detector
passive iris driver
shutter timer
without built-in electronics
DC control
DC - Iris Lens (No built-in electronics)
Types of Iris Control
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
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Fixed focal length withfixed iris manual irisdc-iris (=passive)auto-iris (=active)Zoom lens withauto-irismanual iris overrideManual zoom lens withmanual irisauto-irisVarious lenses to choose from
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
16 - F1.2
2/3"
2/3"
Focal Plane
33 x 25
Lens and Sensor Relationship
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
12 - F1.2
Focal Plane
1/2"
1/2"
33 x 25
Lens and Sensor Relationship
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
8 - F1.2
1/3"
Focal Plane
1/3"
33 x 25
Lens and Sensor Relationship
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
8 - F1.2
12 - F1.2
16 - F1.2
1/3"
1/3"
1/2"
1/2"
2/3"
2/3"
33 x 25
Focal Plane
Note: If sensor format decreases, the lens must be smaller and closer to the focal plane to retain same angle of view
Lens and Sensor Relationship
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
12,5 mm
CCD
sensor
1/2
CS - mount
lens
CS
CS
Camera with CS - mount
C and CS Mount Lenses
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
12,5 mm
CCD
sensor
1/2
Camera with CS - mount
C and CS Mount Lenses
CS - mount
lens
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
CCD
sensor
1/2
17,526 mm
C - mount
lens
C
CS
Camera with CS - mount
C and CS Mount Lenses
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
17,526 mm
CCD
sensor
1/2
C - mount
lens
C
CS to C
adapter
Camera with CS - mount
C and CS mount lenses
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
CCD
sensor
1/2
C - mount
lens
17,526 mm
Camera with CS - mount
CS to C
adapter
C and CS mount lenses
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
What is an IR corrected lens and when do I need that?
There are two situations where IR-corrected lenses should be preferred:When the illumination changes between visible and infrared light; When using light composed of a mixture of visible light and IR-light; such as sunlight, halogen.The above is valid when using monochrome or day/night cameras only.Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
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Technology:
Normal lens:
Focus shift between visible and IR parts. Image will be un-sharp.IR compensated lens:
Visible and IR parts are both in focus. Image will be sharp.IR Corrected Lens and when do I need that?
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Security Systems
Day/Night camera with IR illuminationColor image during daylight.Monochrome image is focussed using IR illuminator during night.Monochrome cameraImage stays in focus using IR illuminatorsSharper Dusk/Dawn image because IR light part is focussed.Less car headlamp blooming caused by out of focus IR lightIR Corrected Lens and when do I need that?
Confidential | Department | 10/15/2008 | Robert Bosch GmbH 2008. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
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Varifocal lens
Sample Data Sheet
1/3 CS Varifocal 5 - 50mmHigh quality opticsManual and DC-iris modelsDC-iris, 4-pin and 6-pin Compact designf/stop F/1.4
