Title: Secure active sensor

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.

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Inventors: Malone, Warren L. (Falls Church, VA, US)

Application Number: 453453
Filing Date: 1974-03-21
Publication_date: 1976-03-09
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 356/5.03
Other Classes:
US Patent Ref:

3019690	Feb, 1962	Hildebrand et al.	356/5.
3617930	Nov, 1971	Snitzer et al.	331/94.
3676003	Jul, 1972	Naiman et al.	356/5.
3743418	Jul, 1973	Heflinger	356/5.
3802775	Apr, 1974	Hughes	356/4.
3825340	Jul, 1974	Debart	356/5.

Other Refs:
Primary Examiner: Farley, Richard A.
Assistant Examiner: Buczinski, S. C.
Attorney: Sciascia; R. S., Branning; Arthur L., Montanye; George A.