Entrance system for a photodetector having a 180 degree image an

Details Entrance system for a photodetector having a 180 degree image an Entrance system for a photodetector having a 180 degree image an

1987-12-08

1989-03-21

Evans, F. L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356225, G01J 142

Patent

active

048146056

ABSTRACT:
Disclosed is an entrance system having an image angle of 180.degree. suite 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.

REFERENCES:
patent: 4253764 (1981-03-01), Morrill
patent: 4609288 (1986-09-01), Dodge
patent: 4703173 (1987-10-01), Wood et al.

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