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An optical element that partially absorbs incident radiation, often called an absorption filter. The absorption is selective with respect to...



= Encyclopedia Article; = Research Update
Transmission of a conversion filter, used to convert the spectral distribution of a light bulb (color temperature of 2360 K or 3790°F) to that of the Sun (color temperature of 5500 K or 9440°F). (After Eastman Kodak Co., Kodak Filters for Scientific and Technical Uses, 1972)
From Encyclopedia article 'Color filter'