Accession Number : ADD008615

Title :   Light Spot Position Sensor for a Wavefront Sampling System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Pohle,Richard H

Report Date : 16 Jun 1981

Pagination or Media Count : 5

Abstract : A light spot position sensor for a wavefront sampling system having a crossed Ronchi chopper disk interposed between the diffracted laser beams of the wavefront sampling system and the intensity detectors located within the wavefront sampler. The crossed Ronchi chopper disk interrupts, at a predetermined interval, the diffracted beam of light which focuses as a spot on the disk. The relative position of the spot(s) is determined with respect to an alignment beam, the position of which is known. By means of appropriate electronics the electronic phase of each frequency of the spot is detected and compared with the phase of each frequency of the known spot to provide a two axis spot position location. (Author)

Descriptors :   *Patents, *Laser beams, *Aiming, Wavefronts

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE