Beam-Modulation Methods in Quantitative and Flow-Visualization Holographic Interferometry,
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
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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.
- Fluid Mechanics