Submillimeter Spectroradiometers with n-InSb Detectors

The optimal characteristics of amplitude splitters for submillimeter radiation beams are determined. Versions of optical schemes with large light gathering power utilized such splitters are proposed. Using them high sensitive reciving devices for 2-0.2 mm waveband region with Fabry-Perot and Michelson interferometers and n-InSb immersion detectors (spectroradiometers) are constructed.