Accession Number : AD0164437

Title :   Laser Doppler Velocimeter Detector.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Goethert,Winfred H.

Report Date : 21 AUG 1973

Pagination or Media Count : 3

Abstract : The patent describes a laser doppler velocimeter detector for determining velocity information in flow fields in which a laser beam used in the flow field is split into a pair of beams, one of which has its plane of polarization rotated 90 degrees. A portion from each of the oppositely polarized beams is mixed to produce the desired doppler information. Polarization beam splitting is provided producing two beams, each containing doppler shifted information. Each of the beams is detected to provide a pair of representative electrical signals, one of which is subsequently inverted and added to the uninverted to result in a signal having only the frequency content of the original doppler information.

Descriptors :   *Laser velocimeters, *Patents, Flow fields, Doppler effect, Signal processing

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE