Accession Number : ADD010843

Title :   Distance Measuring System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : McCormack,R G

Report Date : 09 Aug 1983

Pagination or Media Count : 4

Abstract : A modulated light beam from a radiation source on a structure whose position is to be measured is split into a first beam which propagates through the atmosphere to a first detector and a second beam which travels through an optical fiber to a second detector. The first and second detectors recover the modulation on the first and second beams, the phases of which are compared to determine the distance. In a preferred embodiment, the light source is a sine-wave modulated laser. (Author)

Descriptors :   *Patents, *Distance measuring equipment, *Light sources, Modulation, Light transmission, Detectors, Fiber optics, Lasers, Sine waves, Light pulses, Reflectance

Subject Categories : Test Facilities, Equipment and Methods
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE