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Proceedings Paper

Flow Field Testing With A 64 Parallel Channel Heterodyne Interferometer
Author(s): N. A. Massie; D. M. Swain; M. R. Dunn; S. E. Muenter
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Paper Abstract

A sensor system capable of simultaneously measuring phase at 64 discrete points has been developed for use with the digital heterodyne interferometer. With this, two dimensional optical path difference maps of high speed phenomena can be obtained. Featured in this system are 64 channels of phase detection with each channel being provided with a dedicated memory 16 bits wide and 4096 words deep. The system operates at a 100 kHz sample rate and has a sensitivity of 1/300 of a wave rms. A novel method of post priori removal of the corrupting motions of the interferometer optics was demonstrated, allowing high fidelity measurements to be obtained in an unstabilized environment.

Paper Details

Date Published: 1 August 1983
PDF: 7 pages
Proc. SPIE 0351, Wavefront Sensing, (1 August 1983); doi: 10.1117/12.933927
Show Author Affiliations
N. A. Massie, Western Research (United States)
D. M. Swain, Rockwell International (United States)
M. R. Dunn, Western Research (United States)
S. E. Muenter, Rockwell International (United States)

Published in SPIE Proceedings Vol. 0351:
Wavefront Sensing
Noah Bareket; Chris L. Koliopoulos, Editor(s)

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