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1 August 1983 Flow Field Testing With A 64 Parallel Channel Heterodyne Interferometer
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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.
© (1983) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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