Accession Number : ADD009459

Title :   Programmable Scanner/Tracker.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Green,William J , Jr ; Mongeon,Robert J ; Wolff,Robert E , Sr ; Decker,Randall O

Report Date : 13 May 1982

Pagination or Media Count : 11

Abstract : A scanning and/or tracking mechanism for use in airborne obstacle avoidance optical radars operating in the infrared region. The radar beam is scanned by passing it through a pair of in-line rotating optical wedges which rotate around the boresight axis and which are transparent to the infrared radiation. The wedges are separately driven by servo systems including hollow shaft torque motors with the wedges mounted in the hollow shafts thereof. A high resolution and low backlash shaft position encoder is utilized comprising encoding discs directly driven by the optical wedges and including a novel decoding system. (Author)

Descriptors :   *Patent applications, *Radar scanning, *Radar tracking, *Collision avoidance, *Optical radar, Airborne, Flight paths, Infrared scanning, Infrared tracking, Steerable antennas, Echoes, Signal processing, Helicopters, Aircraft equipment, Axes, Boresighting, Servomechanisms, High resolution, Radar beams

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE