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Proceedings Paper

Interferometric displacement measurement with automatic compensation ofinfluences of the ambient air
Author(s): Heinrich A. Hoefler; J. Molnar; Christiane Schroeder; K. Kulmus
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Paper 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.

Paper Details

Date Published: 1 October 1990
PDF: 9 pages
Proc. SPIE 1375, ICALEO '89: Optical Sensing and Measurement, (1 October 1990); doi: 10.1117/12.35035
Show Author Affiliations
Heinrich A. Hoefler, Fraunhofer-Institut fuer Physikalische Messtechnik (Germany)
J. Molnar, Fraunhofer-Institut fur Physik (Germany)
Christiane Schroeder, Fraunhofer-Institut fur Physikalische Messtechnik (Germany)
K. Kulmus, Fraunhofer-Institut fur Physikalische Messtechnik (Germany)


Published in SPIE Proceedings Vol. 1375:
ICALEO '89: Optical Sensing and Measurement
Kevin G. Harding, Editor(s)

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