Study on Cavity Type Thermal Radiation Detector (1)

Consideration on Effective Absorption of Conical Cavity Detector

Abstract

The dependence of spectral response on wavelengths ranging from visible to infrared was observed using a thermal radiation detector whose surface had been covered with gold-black absorbent. Conical cavity type detectors decrease the effective reflectance through repeated reflections. Data concerning the correlation between the cone vertex (90°, 60°, 45°) and the various reflectances (0.1-0.6) of the absorbent on the cone were obtained.