Accession Number : ADD001401

Title :   Direct Vision Laser Range Gate System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Erickson,Allen M ; Kaplow,Robert L ; King,Lawton

Report Date : 10 Sep 1974

Pagination or Media Count : 4

Abstract : The patent discloses a range gate system to permit direct visual observation through visual obstructions having a laser which illuminates with a series of light pulses and develops a signal to initiate an electrical delay equal to the time required for the pulse to travel to and return from an obscured object. The delay activates a pulse generator to produce an electroacoustic shock wave which opens and closes a Fabry-Perot visual shutter for a period of nanoseconds to permit the object reflection to pass through to the observer's eyes.

Descriptors :   *Optical detection, *Range gating, *Lasers, *Patents, Delay circuits, Phase modulation, Shutters(Optics), Piezoelectric crystals, Illumination, Pulse generators

Subject Categories : Lasers and Masers
      Optical Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE