Accession Number : ADD002686

Title :   Secure Active Sensor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Malone,Warren L

Report Date : 09 Mar 1976

Pagination or Media Count : 5

Abstract : The patent discloses an improved apparatus and technique for providing frequency selective sensing 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.

Descriptors :   *Optical radar, *Patents, Frequency modulation, Control, Dye lasers, Optical tracking, Magnetic fields, Optical detection, Optical filters

Subject Categories : Optical Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE