Accession Number : ADA298018

Title :   Laser Doppler Velocimetry: Analytical Solutions of the Optical System Including the Effects of Partial Coherence of the Source,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA TECHNOLOGY OPERATIONS

Personal Author(s) : Yura, H. T. ; Hanson, S. G. ; Lading, L.

PDF Url : ADA298018

Report Date : 15 JAN 1995

Pagination or Media Count : 26

Abstract : Within the framework of ABCD matrix theory, analytical expressions are derived for the time lagged covariance of a classical laser Doppler velocimetry system as a function of the laser spot size, the limiting aperture, and the measurement aperture size. Both partial and fully developed speckle are considered, as well as planar and rotating targets. Further, error estimates are presented that indicate how well one can determine the velocity, in practice, of both planar and rotating targets, and a comparison with time of flight velocimetry is given.

Descriptors :   *LASER VELOCIMETERS, *MATRIX THEORY, SIZES(DIMENSIONS), COHERENCE, TARGETS, ESTIMATES, ERROR ANALYSIS, MATHEMATICAL ANALYSIS, PLANAR STRUCTURES, DOPPLER SYSTEMS, ROTATION, APERTURES, SPECULAR REFLECTION, LASER SPOTS.

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE