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- Q2790323 subject Q8590087.
- Q2790323 abstract "CIE Standard Illuminant D65 (sometimes written D65) is a commonly used standard illuminant defined by the International Commission on Illumination (CIE). It is part of the D series of illuminants that try to portray standard illumination conditions at open-air in different parts of the world.D65 corresponds roughly to the average midday light in Western Europe / Northern Europe (comprising both direct sunlight and the light diffused by a clear sky), hence it is also called a daylight illuminant. As any standard illuminant is represented as a table of averaged spectrophotometric data, any light source which statistically has the same relative spectral power distribution (SPD) can be considered a D65 light source. There are no actual D65 light sources, only simulators. The quality of a simulator can be assessed with the CIE Metamerism Index.The CIE positions D65 as the standard daylight illuminant:[D65] is intended to represent average daylight and has a correlated colour temperature of approximately 6500 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.".
- Q2790323 thumbnail SPD_D65.png?width=300.
- Q2790323 wikiPageExternalLink CIE_sel_colorimetric_tables.xls.
- Q2790323 wikiPageExternalLink s005.html.
- Q2790323 wikiPageWikiLink Q133454.
- Q2790323 wikiPageWikiLink Q16491.
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- Q2790323 wikiPageWikiLink Q327408.
- Q2790323 wikiPageWikiLink Q332084.
- Q2790323 wikiPageWikiLink Q374617.
- Q2790323 wikiPageWikiLink Q374677.
- Q2790323 wikiPageWikiLink Q375479.
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- Q2790323 wikiPageWikiLink Q545002.
- Q2790323 wikiPageWikiLink Q669408.
- Q2790323 wikiPageWikiLink Q7200989.
- Q2790323 wikiPageWikiLink Q8590087.
- Q2790323 comment "CIE Standard Illuminant D65 (sometimes written D65) is a commonly used standard illuminant defined by the International Commission on Illumination (CIE).".
- Q2790323 label "Illuminant D65".
- Q2790323 depiction SPD_D65.png.