1 October 1990 Interferometric displacement measurement with automatic compensation ofinfluences of the ambient air
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Abstract
Fluctuations of the refractive index of air causes nowadays the largest errors in high precise interferometric displacement measuring systems. We present in this paper a new method for compensating these influences by tuning the optical frequency of the laser. Variing laser temperature and current regulates the frequency (wavelength) of a GaA1As-semiconductor laser in such a manner that the wavelength in air is constant.
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Heinrich A. Hoefler, Heinrich A. Hoefler, J. Molnar, J. Molnar, Christiane Schroeder, Christiane Schroeder, K. Kulmus, K. Kulmus, } "Interferometric displacement measurement with automatic compensation ofinfluences of the ambient air", Proc. SPIE 1375, ICALEO '89: Optical Sensing and Measurement, (1 October 1990); doi: 10.1117/12.35035; https://doi.org/10.1117/12.35035
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