Electronic heterodyning in an optical detector

Details Electronic heterodyning in an optical detector Electronic heterodyning in an optical detector

1976-11-11

1979-05-22

Griffin, Robert L.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

328144, 328154, G02F 200

Patent

active

041561350

ABSTRACT:
An optical detector, being operated in a non-linear portion of its response urve, is used as an electronic heterodyning element for two applied frequencies. They may be applied with two modulated light sources, or one source and an alternating current bias component to provide a preselected sum or difference output signal for selectable input frequencies allowing optical tracking of a target.

REFERENCES:
patent: 3482099 (1969-12-01), Goodwin
patent: 3569996 (1971-03-01), Goell
Monte Ross, "Laser Receivers" 9-29-66, pp. 108-121 "Photomixing".

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