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.

To search for another term please use  "Back to the list" to return to the main page or the e-ILV.

For the complete set of terms and definitions CIE S 017:2020 can be purchased from the CIE Webshop. Members of a CIE National Committee or Associate National Committee have access to a 66,7 % discount on the purchase price of the standard.

For advice on CIE Publications contact Note the CIE Helpdesk cannot assist with technical enquiries.


stray light, <in measurement>

unwanted light that forms part of the measurement

EXAMPLE Light that reaches the detector from directions other than the desired path from the source to the detector, e.g. light scattered from walls, ceilings or optical components within the measuring system.
Light that reaches the detector which is at a wavelength other than the wavelength intended to be measured.

Note 1 to entry: This entry was numbered 17-1273 in CIE S 017:2011.

Publication date: 2020-12
Copyright © CIE 2020. All Rights Reserverd.