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Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and...

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CIE Central Bureau Babenbergerstraße 9/9A, 1010 Vienna, Austria Phone: +43 1 714 31 87 E‐Mail: [email protected] Userguide to the Equivalent Daylight (D65) Illuminance Toolbox This Userguide relates to EDI Toolbox beta version E1.05 for Eindhoven Workshop Tutorial on CIE S 026 ‐ Use and application of the new metrology for ipRGC‐influenced responses to light ‐ 15 March 2019, Eindhoven
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Page 1: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

CIE Central BureauBabenbergerstraße 9/9A, 1010 Vienna, Austria Phone: +43 1 714 31 87 E‐Mail: [email protected]

Userguide to the Equivalent Daylight (D65) Illuminance Toolbox

This Userguide relates to EDI Toolbox beta version E1.05 for Eindhoven Workshop

Tutorial on CIE S 026 ‐ Use and application of the new metrology for ipRGC‐influenced responses to light ‐ 15 March 2019, Eindhoven

Page 2: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Toolbox main features

• CIE S 026 calculations and conversionsWeighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

• Irradiance or radiance geometryIlluminance or luminance, α‐opic equivalent daylight (D65) illuminance or luminance, etc.

• Built‐in illuminantsA, D65, E, F11, LED‐B3

• User‐defined Test spectrumChoice of resolution (1, 2, 4 or 5 nm) and SI prefixes (E,P,T,G,M,k, ,m,μ,n,p,f,a) / ( ,c,m)2

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Page 3: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Toolbox optional features

• Glossary and spectral weighting chartsVersion will be operational until 30 June 2019, when a final version is expected to be available. 

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The Equivalent Daylight (D65) Illuminance Toolbox and Userguide were designed by the International Commission on Illumination (“CIE”) to enable calculations and conversions of measured quantities related to the non‐visual effects of light, following the international standard CIE S 026/E:2018. System for Metrology of Optical Radiation for ipRGC‐Influenced Responses to Light. CIE, Vienna.

This beta version (v1.05X) has been designed for early release and feedback from the participants of the Tutorial on CIE S 026. Use and application of the new metrology for ipRGC‐influenced responses to light. 14‐15 March 2019, Eindhoven. It is an important disclaimer that the user of the Toolbox should always check the results against manual calculations according to the standard.

After the 30 June 2019, a final version of the Toolbox is expected to be freely available. As a result, this beta version is programmed to stop working after this date. Considered feedback or enquiries about the Toolbox should be sent to [email protected] and [email protected] who will endeavour to answer any questions as quickly as possible.The purpose of the toolbox is to support the usage of CIE S 026 but is not part of the official International Standard.

Page 4: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Five photoreceptors: Five α‐opic action spectra

4

0.0

0.2

0.4

0.6

0.8

1.0

1.2

380 460 540 620 700 780

relativ

e sensitivity

wavelength, nm

α pigment (receptor)sc S‐cone‐opicmc M‐cone‐opiclc L‐cone‐opicrh rhodopic (rods)mel melanopic (ipRGCs) 

Page 5: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Examples of α‐opic quantitiesα‐opic can be: S‐cone‐opic; M‐cone‐opic; L‐cone‐opic; Rhodopic; Melanopic

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Page 6: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Physical Measurement of Radiation & Light

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Photon system Radiometric system Photometric systemUnbounded Unbounded Bounded between 360 nm and 830 nm

Physical weightingConserved property = number

Physical weightingConserved property = energy

Psychophysical weighting V(λ)Conserved property = brightness

Quantity Unit Quantity Unit Quantity Unitphoton intensity s‐1.sr‐1 radiant intensity W.sr‐1 luminous intensity cdphoton radiance s‐1.m‐2.sr‐1 radiance W.m‐2.sr‐1 luminance cd.m‐2

photon irradiance s‐1.m‐2 irradiance W.m‐2 illuminance lxphoton exposure m‐2 radiant exposure J.m‐2 luminous exposure lx.sphoton flux s‐1 radiant power W luminous flux lmnumber of photons 1 radiant energy J luminous energy lm.s

• By definition, light can only be measured using the photometric system

CIE S 017/E:2011 is also freely available in a searchable electronic format at eilv.cie.co.at.

Conversion factors (hc/λ).na(λ) Kcd.V(λ)

where Kcd = 683 lm.W‐1

Page 7: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Toolbox Orientation

7

Dark blue = data entry

Instructions

+ warning

s

* = Error indicators

Page 8: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Inputs: Quick calculations

For built‐in spectra1. Select from list

(5 CIE illuminants)   < LED‐B3 >

2. Select quantity(6 options)        < illuminance >

& units(SI prefixes)        < k > < blank >

3. Enter value(The end)    < 0.1 klx = 100 lx >

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UserAD65EF11LED‐B3

photon radiancephoton irradianceradianceirradianceluminanceilluminance

EPTGMk

mμnpfa

cm

Page 9: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Three basic quantitiesirradiance, illuminance and log photon irradiance

α‐opic irradiance(in W.m‐2)

α‐opic ELRefficacy of luminous radiation, (in mW.lm‐1)

α‐opic DERdaylight (D65) efficacy ratio, (dimensionless)

α‐opic EDIequivalent daylight (D65) illuminance, (in lux)

α‐opic photon irradiance(in log10 s‐1.m‐2)

Outputs: Results

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Page 10: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: SI prefixes

10

EPTGMk

mμnpfa

cm

luminance, e.g. cd.mm‐2

but not illuminance, lx

Page 11: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Irradiance (in W.m‐2)

Illuminance (in lux)

Log photon irradiance(in log10 s‐1.m‐2)

Outputs: Basic quantities

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Page 12: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: Rescaling using SI prefixes

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Page 13: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: α‐opic irradiance

Eα [in W.m‐2]

"effective photobiological irradiance with the spectral irradiance, Ee,λ(λ), spectrally weighted with the α‐opic action spectrum sα(λ)"

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Page 14: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Calculating melanopic irradiance

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Page 15: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: α‐opic EDI

EDI =  EquivalentDaylight (D65)Illuminance

"illuminance produced by radiation conforming to standard daylight (D65) that provides an equal α‐opic irradiance,as the test source"

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Page 16: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: Calculation of α‐opic EDI

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EDI =  EquivalentDaylight (D65)Illuminance

"illuminance produced by radiation conforming to standard daylight (D65) that provides an equal α‐opic irradiance,as the test source"

Ev,α = Eα ∙ Ev / Eα

Ev,α = Eα / Kα,v

Kα,v = Eα / EvD65 D65D65

D65

D65

D65 D65

D65

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Page 17: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Calculating melanopic equivalent daylight (D65) illuminance

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Page 18: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Calculation summary

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Page 19: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: α‐opic photon irradiance

Ep,α [in s‐1.m‐2]"effective photobiological photon irradiance with the spectral photon irradiance, Ep,λ(λ)(or number of photons per second per square metre), spectrally weighted with the α‐opic action spectrum sp,α(λ)"

Measurement value (input sheet)

The value should match the quantity name and units selected, and shown above. Leave blank if using a spectral input.

Displayed to 2 d.p., but enter to required accuracy. Take extra care with accuracy for log quantities.

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Page 20: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

For user spectra1. Select TEST

< User >

2. Select quantity(4 options)        < irradiance >

& units(SI prefixes)             < μ > < c >

Inputs: User‐defined spectrum

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UserAD65EF11LED‐B3

photon radiancephoton irradianceradianceirradianceluminanceilluminance

EPTGMk

mμnpfa

cm

Page 21: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Inputs: User‐defined spectrum (2)

2. Select quantity(4 options)        < irradiance >

& units(SI prefixes)             < μ > < c >

3. Clear step 34. Enter resolution

(1,2,4 or 5 nm)   < 1 >

5. and spectrum(380 nm to 780 nm)

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< 2 >

Page 22: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: what else (1)

α‐opic ELR [in mW.lm‐1](efficacy of luminous radiation)

Why? Because…

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Ev,α = Eα / Kα,vD65D65

Kα,v = Eα / EvD65 D65D65

Page 23: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Outputs: what else (2)

α‐opic DER [no units](daylight (D65) efficacy ratio)

Why? Because…

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γα,v = Kα,v / Kα,vD65

Ev,α = Ev ∙ γα,v

D65

D65D65

(DER unlike ELR depends on the relative spectral distribution, e.g. LED‐B3 here.)

Page 24: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Glossary

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Page 25: Userguide to the Equivalent Daylight (D65) Illuminance Toolbox · 2019. 3. 20. · Weighted and unweighted quantities, α‐opic equivalent daylight (D65) illuminance = EDI, etc.

Charts

• Visualization of weighting two different spectra:

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