| Definition: | irradiation or measurement of reflecting materials at 8° to the normal, at one azimuth angle Note 1 to entry: Eight-degree geometry is used to substitute the 0° directional geometry in many practical applications of reflection measurements, as it permits differentiation between specular-component-included and specular-component-excluded measurements. Note 2 to entry: This geometry is restricted to measurements using an integrating sphere as described in CIE 15, Colorimetry.
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