Difference between revisions of "Filter"

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{{languages|Filter}}
{{languages|Filter}}
[[Category:2.2 Optical Apparatus]
[[Category:2.2 Optical Apparatus]]
[[Category:Alphabetical Index]]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]
[[Category:IALA Dictionary 1970-89 Edition]]

Revision as of 00:05, 25 February 2009

2-2-195

A device which is used to modify, by transmission, the radiant or luminous flux, or the spectral distribution, or both, of the radiation passing through it.


Note: A distinction is made between Selective Filters and Non-Selective Filters according as they do or do not alter the relative spectral distribution of the radiation.

Reference: C.I.E. (modified)




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)