Goniophotometry
Introduction '''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"