Accession Number : ADD010006

Title :   Short Range Optical Rangefinder.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Miller,Walter E , Jr ; Westrich,Richard G , Jr ; Jones,Michael M

Report Date : 18 Oct 1982

Pagination or Media Count : 12

Abstract : An optical rangefinder having a transmitter and receiver located closely adjacent for short range operation allows optimum detection of a target when either or both the target and the rangefinder are moving. An optical window region is established where the transmitter look axis intersects the receiver look axis and is adjustable for providing an output siganal when the rangefinder and target are less than approximately ten feet apart. The transmitter may emit either noncoherent or coherent infrared energy. The receiver includes zero crossing detection when a received maximum signal intensity is reached and adequate signal detection means which activates when the signal level exceeds a desired minimum. An output signal is generated when the outputs of these two detection circuits are coincident. (Author)

Descriptors :   *Patent applications, *Infrared fuzes, *Projectile fuzes, *Proximity fuzes, *Range finding, Short range(Distance), Infrared pulses, Optical equipment, Infrared radiation, Clocks, Coherence, Windows, Signals, Receivers, Detection, Circuits, Operation, Optimization, Intensity, Axes, Output, Regions, Energy

Subject Categories : Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE