Interferential Wavelengths Comparison With Real-Time Signal Processing

P. Bouchareine; B. Rougie

doi:10.1117/12.958314

20 May 1980 Interferential Wavelengths Comparison With Real-Time Signal Processing

P. Bouchareine, B. Rougie

Proceedings Volume 0210, 2nd European Congress on Optics Applied to Metrology; (1980) https://doi.org/10.1117/12.958314
Event: Optics, Photonics, and Iconics Engineering Meeting, 1979, Strasbourg, France

Abstract

The two wave field widened interferometer of "Institut National de Metrologie" (I.N.M.) is controlled by Micral R2E microprocessor (Intel 8008) for data acquisition and real time signal processing. Two different methods are described, one involving a servo controlled step by step scanning of the path difference, in the second one this scanning is approximately linear with time, and the microprocessor samples interferometric signal at a high rate. In both methods a real time signal processing is achieved. We compare the results of phase measurements by the two methods ; the reproducibility may be in both cases within a few 10^-4 of a fringe.

Citation Download Citation

P. Bouchareine and B. Rougie "Interferential Wavelengths Comparison With Real-Time Signal Processing", Proc. SPIE 0210, 2nd European Congress on Optics Applied to Metrology, (20 May 1980); https://doi.org/10.1117/12.958314

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