Entrance system for a photodetector having a 180 degree image angle and detector provided therewith

摘要

Disclosed is an entrance system having an image angle of 180 DEG suitable for a radiation detector for detecting differing wavelengths of sunlight, comprising a hemispherical shell of light transmitting material; a tube of light transmitting material extending coaxially from the hemispherical shell; a granulated light scattering medium containing inside the hemispherical shell; and a stepped body of light transmitting material inserted into the tube, the stepped body having an end which terminates in at least three steps and which abuts against the granulated medium and seals the medium in the hemispherical shell.