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EVS-EN ISO 11664-2:2011

Colorimetry - Part 2: CIE standard illuminants (ISO 11664-2:2007)

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Kehtetu alates 17.10.2022
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ISO 11664-2:2007; EN ISO 11664-2:2011
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Standardi ajalugu

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Kuupäev
Tüüp
Nimetus
17.10.2022
Põhitekst
02.06.2011
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Põhitekst
EVS-ISO 10526:2003
This International Standard specifies two illuminants for use in colorimetry. The illuminants, which are defined in clauses 4 and 5 of this International Standard, are as follows: a) CIE standard illuminant A This is intended to represent typical, domestic, tungsten-filament lighting. Its relative spectral power distribution is that of a Planckian radiator at a temperature of approximately 2 856 K. CIE standard illuminant A should be used in all applications of colorimetry involving the use of incandescent lighting, unless there are specific reasons for using a different illuminant. b) CIE standard illuminant D65 This is intended to represent average daylight and has a correlated colour temperature of approximately 6 500 K. CIE standard illuminant D65 should be used in all colorimetric calculations requiring representative daylight, unless there are specific reasons for using a different illuminant. Variations in the relative spectral power distribution of daylight are known to occur, particularly in the ultraviolet spectral region, as a function of season, time of day, and geographic location. However, CIE standard illuminant D65 should be used pending the availability of additional information on these variations.

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