Secure active sensor

Details Secure active sensor Secure active sensor

1974-03-21

1976-03-09

Farley, Richard A.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 5, 356112, G01C 308

Patent

active

039428907

ABSTRACT:
An improved apparatus and technique for providing frequency selective seng and tracking. An optical radar transmitter is constructed using a dye laser controlled by a Faraday cell having two end polarizers. The Faraday cell extends to intercept the return beam from the transmitting laser. Using a magnetic field to control the Faraday cell, the frequency of transmission can be selectively varied while the receiver-detector is automatically ganged to the transmitted frequency. The particular frequency selectivity provides significant isolation of the sensing beam from unwanted and interfering radiation allowing highly selective optical beam tracking.

REFERENCES:
patent: 3019690 (1962-02-01), Hildebrand et al.
patent: 3617930 (1971-11-01), Snitzer et al.
patent: 3676003 (1972-07-01), Naiman et al.
patent: 3743418 (1973-07-01), Heflinger
patent: 3802775 (1974-04-01), Hughes
patent: 3825340 (1974-07-01), Debart

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