Apparatus for extending the infrared response of photocathodes

Details Apparatus for extending the infrared response of photocathodes Apparatus for extending the infrared response of photocathodes

1988-12-09

1990-01-02

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313543, H01J 3150

Patent

active

048915076

ABSTRACT:
An efficient energy upconversion unit is optically coupled to a photocathode. The upconversion unit receives incident infrared electromagnetic energy of longer wavelengths and emits, in response, electromagnetic energy within a band of shorter wavelengths to which the photocathode is more responsive. Through such energy upconversion, the photoresponse of the cathode is extended to much longer infrared wavelengths.

REFERENCES:
patent: 3870921 (1975-03-01), Burns
patent: 3971932 (1976-07-01), Sewell et al.

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