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Goniophotometry

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Goniophotometry or goniometric optical scatter measurement is the technique of measuring the angular distribution of light, possibly wavelength-dependent, scattered from a surface.

Goniophotometry is used to measure intensity distributions from lamps and luminaries and to evaluate the gloss of paints and other surface finishes.

References

ASTM E2387-19 "Standard Practice for Goniometric Optical Scatter Measurements"

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