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Proceedings Paper

Use of nonscanning coherence radar for distance measurement
Author(s): Dumitru Gh. Ulieru
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Paper Abstract

These are several laser based techniques available for measuring the distance to diffusely scattering surfaces. The most used method is the triangulation probe where the image of a laser spot is viewed at an angle to the incident beam direction. In the paper will be shown how the non scanning white light interferometer can be used for measurement of distance or distance differences to surfaces which are extremely yeregh in an optical sense. The light is divided by a beamsplitter and reflected from two surfaces, one reference and one object surface. After recombination it is spatially filtered. At distance difference causes a delay between the reflections. The delay can be measured with the nonscanning white-light interferometer by finding the positions of the correlation peaks. Since there are no moving parts the interferometer can be used to measure rapidly moving objects.

Paper Details

Date Published: 28 May 1999
PDF: 6 pages
Proc. SPIE 3707, Laser Radar Technology and Applications IV, (28 May 1999); doi: 10.1117/12.351354
Show Author Affiliations
Dumitru Gh. Ulieru, ROMES S.A. (Romania)

Published in SPIE Proceedings Vol. 3707:
Laser Radar Technology and Applications IV
Gary W. Kamerman; Christian Werner, Editor(s)

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