REALIZATION OF TOTAL SPECTRAL RADIANT FLUX SCALE AND CALIBRATION SERVICE AT NIST

摘要

In response to the increasing needs for standards to calibrate sphere-spectroradiometer systems used to measure various types of light sources, we have realized the total spectral radiant flux (TSRF) scale, developed transfer standard lamps, and established a calibration service for incandescent standard lamps in the spectral range of 360 nm to 830 nm with relative expanded uncertainties (k=2) between 1 % (at visible and near infrared regions) to 2 % (in ultraviolet (UV) region). The TSRF scale is based on both the NIST spectral irradiance scale and the total luminous flux scale and is realized by using a gonio-spectroradiometer for measuring relative TSRF and a detector-based absolute integrating sphere for measuring total luminous flux.