ISO/CIE 11664-2:2022
Colorimetry — Part 2: CIE standard illuminants
This document defines three CIE standard illuminants for use in colorimetry: CIE standard illuminant A for the representation of typical tungsten-filament lighting, CIE standard illuminant D65 for the representation of average daylight having a correlated colour temperature of approximately 6 500 K and CIE standard illuminant D50 for the representation of daylight with a correlated colour temperature of approximately 5 000 K. Values of the relative spectral power distribution of the three illuminants are included in this document.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 CIE standard illuminant A
4.1 Definition
4.2 Theoretical basis
5 CIE standard illuminant D65
5.1 Definition
5.2 Experimental basis
5.3 Correlated colour temperature
6 CIE standard illuminant D50
6.1 Definition
6.2 Correlated colour temperature
7 Sources for realizing CIE standard illuminants
7.1 Source for CIE standard illuminant A
7.2 Sources for CIE standard illuminants D65 and D50
Annex A (informative) Table of relative spectral power distribution of CIE standard illuminant A
Annex B (normative) Table of relative spectral power distributions of CIE standard illuminants D65 and D50
Annex C (informative) History of the definition of CIE standard illuminant A
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 CIE standard illuminant A
4.1 Definition
4.2 Theoretical basis
5 CIE standard illuminant D65
5.1 Definition
5.2 Experimental basis
5.3 Correlated colour temperature
6 CIE standard illuminant D50
6.1 Definition
6.2 Correlated colour temperature
7 Sources for realizing CIE standard illuminants
7.1 Source for CIE standard illuminant A
7.2 Sources for CIE standard illuminants D65 and D50
Annex A (informative) Table of relative spectral power distribution of CIE standard illuminant A
Annex B (normative) Table of relative spectral power distributions of CIE standard illuminants D65 and D50
Annex C (informative) History of the definition of CIE standard illuminant A
Bibliography