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Goniometric optical scatter instrument (GOSI) The bidirectional reflectance distribution function (BRDF) quantifies the angular distribution of radiation
The NIST Physical Measurement Laboratory has established the color and appearance metrology facility to support calibration services for 0°/45° colored samples
Manufacturers are creating pigments with new and unique appearance attributes. For example, gonioapparent materials such as metallic and pearlescent coatings
The Sensor Science Division has a focused beam spectroscopic Mueller matrix ellipsometer. Its capabilities include Wavelengths from 245 nm to 1000 nm Spot size
Specular gloss is the perception by an observer of the mirror-like appearance of a surface. The measurement of specular gloss consists of comparing the luminous
High-accuracy index of refraction measurements are made at NIST using a custom minimum-deviation-angle refractometry system. It uses all-reflective optics and a
The primary purpose of the 0:45 reflectometer is to disseminate color standards to the color and appearance community. The instrument was designed to provide
The reference integrating sphere performs directional-hemispherical reflectance measurements of spectrally neutral, non-fluorescent samples at room temperature
The Reference Transmission Densitometer (RTD) is the national reference instrument for standard diffuse visual transmittance density measurements for x-ray and
The Reference Transmittance Spectrophotometer (RTS) is the national reference instrument for regular spectral transmittance measurements of non-fluorescent
ROSI performs specular and bidirectional reflectance measurements of spectrally neutral, non-fluorescent specular and diffuse samples at room temperature. It
A Perkin-Elmer Lambda 1050 spectrophotometer is used to complement the reference reflectance and transmittance instruments. It performs this function by