Recent Developments of the NIST Reference Colorimeter

摘要

In response to recommendations by industry,the Optical Technology Division at the National Institute of Standards and Technology(NIST)developed a reference instrument for measuring the surface color of materials with high accuracy.The new reference colorimeter measures the spectral reflectance factors of non-fluorescent samples,from which color quantities are calculated.The Division now provides a calibration service for the 0deg /45deg geometry(illumination at 0deg and viewing at 45deg )for industrial color standards.Customers either send samples(typically colored tiles)to NIST for calibration or purchase calibrated samples from NIST.These standards are used to calibrate their own instruments.Additions to the instrument will allow bidirectional measurements over all combination of illumination and viewing angles,which are important for the colorimetric characterization of gonio-apparent materials and directional-hemispherical measurements at 0deg and 8deg illumination angles.