Accession Number : ADP005552

Title :   Beam-Modulation Methods in Quantitative and Flow-Visualization Holographic Interferometry,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Personal Author(s) : Decker,Arthur J.

Report Date : NOV 1986

Pagination or Media Count : 16

Abstract : This report discusses heterodyne holographic interferometry and time-average holography with a frequency shifted reference beam. Both methods will be used for the measurement and visualization of internal transonic flows, where the target facility is reviewed. Measurements using heterodyne holographic interferometry are presented. Performance of the laser required for time-average holography of time-varying transonic flow is discussed.

Descriptors :   *HOLOGRAPHY, *TRANSONIC FLOW, HETERODYNING, FLOW VISUALIZATION, CASCADE STRUCTURES, FREQUENCY SHIFT, LASER BEAMS, MODULATION, INTERFEROMETRY

Subject Categories : Holography
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE