Skip to main content
cie

e-ILV

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 helpdesk@cie.co.at. Note the CIE Helpdesk cannot assist with technical enquiries.

17-24-074

transmittance factor

T

quotient of the flux transmitted by a specimen in a given optical system and the flux transmitted when the specimen is removed from the sampling aperture

EXAMPLE Comparison of the radiation penetrating a slide situated in a projector and reaching a screen to the radiation when the slide is removed from the projector and only an empty slide mount is in the projector.

Note 1 to entry: The transmittance factor has unit one.

Note 2 to entry: This entry was numbered 17-1338 in CIE S 017:2011.

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