Accession Number : AD0460781


Title :   LIGHT-PENCIL COORDINATE POSITIONER,


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Fluhr, F R


Report Date : Mar 1965


Pagination or Media Count : 16


Abstract : A number of data-processing operations require the rapid and accurate extraction, control and coordination of position data from cathode ray tube information sources such as radar and IFF PPI repeaters and computer displays. A light pencil which detects and controls a positionand intensity-modulated marker presented on the cathode ray tube screen during the indicator retrace period was devised. The coordinates of this marker may be used to position the video gate which extracts desired signals from the radar/IFF returns without requiring the operator to hold the pencil in position. The light pencil operates independently of the PPI repeater range controls and therefore requires no elaborate rain tracking devices in order to maintain a one-to-one light pencil motion to marker motion. Except for the light detection photomultipler, the entire design is solid state. (Author)


Descriptors :   *CATHODE RAY TUBE SCREENS , DISPLAY SYSTEMS , PLAN POSITION INDICATORS , DATA PROCESSING , POSITION FINDING , RADAR SIGNALS , PHOTOMULTIPLIER TUBES , WIRING DIAGRAMS


Distribution Statement : APPROVED FOR PUBLIC RELEASE