Flow Field Testing With A 64 Parallel Channel Heterodyne Interferometer

N. A. Massie; D. M. Swain; M. R. Dunn; S. E. Muenter

doi:10.1117/12.933927

1 August 1983 Flow Field Testing With A 64 Parallel Channel Heterodyne Interferometer

N. A. Massie, D. M. Swain, M. R. Dunn, S. E. Muenter

Proceedings Volume 0351, Wavefront Sensing; (1983) https://doi.org/10.1117/12.933927
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

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.

Citation Download Citation

N. A. Massie, D. M. Swain, M. R. Dunn, and S. E. Muenter "Flow Field Testing With A 64 Parallel Channel Heterodyne Interferometer", Proc. SPIE 0351, Wavefront Sensing, (1 August 1983); https://doi.org/10.1117/12.933927

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