New Pyrolytic-Graphite Blackbody for Spectral Irradiance

摘要

A new blackbody suitable for spectral irradiance measurements has been developed. The blackbody, BB-PyroG/3000/20 has a pyrolytic graphite radiator and similar design to the blackbody BB3500M that widely used for spectral irradiance, but much smaller, less power consuming and, thus, accessible for to a wider range of users. The new blackbody has a cylindrical cavity with diameter of 20 mm and an opening of 15 mm that large enough for spectral irradiance in combination with an outer aperture of about 6 mm. A comparison of spectral irradiance measurements in the range from 250 nm to 1600 nm were performed using BB-PyroG/3000/20 and BB3500M. The comparison shows the agreement of two blackbodies within measurements uncertainties.