Accession Number : ADD009878
Title : Wire and Wire Like Object Detection System.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Silverman,Bernard B
Report Date : 05 Nov 1982
Pagination or Media Count : 23
Abstract : An optical radar is described for operating in the infrared region of the spectrum and adapted to efficiently detect elongated targets such as wires. The pulsed transmitter is preferably passively Q-switched and produces optical pulses polarized in one direction. A CW local oscillator laser is locked to a frequency slightly offset from the transmitter frequency. A Brewster angle duplexer and a quarter wave plate in the transmit/receive path of the radar permit the transmitter flux to pass to a scanner and direct the orthogonally polarized echo signals to the heterodyne receiver which includes a display or alarm circuit. The transmitter and local oscillator lasers include frequency control circuits. Either wedge or ball joint type scanners may be used to scan the radar beam over a target area of interest.
Descriptors : *Patent applications, *Optical radar, *Infrared detection, Wire, Slender bodies, Radar scanning, Radar beams, Signal processing
Subject Categories : Infrared Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE