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4 terms
Photonics Dictionary: G
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photometer x
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gegenschein-zodiacal light photometer
A photometer used to measure sky brightness and polarization associated with zodiacal light, background starlight, F-region airglow and spacecraft corona.
Glan spectrophotometer
A device similar to the ordinary spectrophotometer but containing particular modifications to provide for the comparison of two sources.
goniophotometer
A device used to measure directional reflectance, with light collection restricted to a narrow range of angles of which the central angle varies.
glossmeter
A photometer for measuring gloss by comparing the specular reflectance to that from a perfect specular reflector.
Photonics Dictionary
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