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The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.

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17-26-077

large source, <in photobiology>

source for which the size of the source image on the retina is so large that radial heat flow from the centre of the image to the surrounding biological tissue is negligibly small compared to heat flow in the axial direction

Note 1 to entry: This entry was numbered 17-641 in CIE S 017:2011.

Publication date: 2020-12
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