Photomultiplier with infrared sensitivity

Details Photomultiplier with infrared sensitivity Photomultiplier with infrared sensitivity

1989-02-21

1991-04-30

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503381, 250347, 2504841, 2504861, 25230145, 2523014P, G01J 100, G01J 158, H05B 3300, B66D 114

Patent

active

050120980

ABSTRACT:
An efficient energy upconversion unit is optically coupled to a photomultiplier. The upconversion unit receives incident infrared electromagnetic energy of longer wavelengths and emits, in response, visible light of shorter wavelengths to which the photomultiplier is more responsive. Through such energy upconversion, the sensitivity of the photomultiplier is extended to much longer infrared wavelengths. The upconversion unit is a photoluminescent material specially formulated to have minimal phosphorescence so as to minimize noise.

REFERENCES:
patent: 4446048 (1984-05-01), Randy et al.
patent: 4451530 (1984-05-01), Kaule et al.
patent: 4500116 (1985-02-01), Ferro et al.
patent: 4705952 (1987-11-01), Lindmayer
patent: 4806772 (1989-02-01), Lindmayer
patent: 4879186 (1989-11-01), Takeguchi

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