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IEVref:731-01-31ID:
Language:enStatus: Standard
Term: conservation of radiance
Synonym1: conservation of brightness (deprecated)
[Preferred]
Synonym2: brightness theorem (deprecated)
[Preferred]
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Definition: a basic principle stating that no passive optical system can increase the quantity L•n-2 where L is the radiance of a beam and n is local refractive index

NOTE – The quantity L•n-2 would be constant if the losses by absorption, scattering etc. were zero.


Publication date:1991-10
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