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Status of bidirectional reflectance distribution function (BRDF) calibration standards development

In response to the current need for physical standards for the calibration of bidirectional reflectance distribution function (BRDF) instruments, NIST has initiated a program to develop such calibration standards. Black glass was selected as a candidate material. An assortment of black glass samples were prepared using optical finishing techniques. BRDF profiles of these samples were measured and showed promising results for use in calibration. Some BRDF profiles are presented in this paper as well as the status of the program and future work that will be performed.