1 October 1990 Interferometric displacement measurement with automatic compensation ofinfluences of the ambient air
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Proceedings Volume 1375, ICALEO '89: Optical Sensing and Measurement; (1990); doi: 10.1117/12.35035
Event: ICALEO89, 1989, Orlando, FL, United States
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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Heinrich A. Hoefler, J. Molnar, Christiane Schroeder, 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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KEYWORDS
Interferometry

Refractive index

Semiconductor lasers

Reflectors

Temperature metrology

Interferometers

Laser stabilization

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