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Proceedings Paper

Polychromatic light-based photorefractive correlator for 3D motion measurement
Author(s): Arvind Kumar; Renu Tripathi; G. S. Pati; Kehar Singh
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Paper Abstract

We have proposed the use of polychromatic light based photorefractive correlator for 3D motion measurement. The double exposures of speckle patterns can be recorded in a BaTiO3 crystal, thus providing a set of interference fringes due to the polychromaticity of the light source and the 3D displacement. Due to the fringes corresponding to the two illuminating wavelengths used in our experiment, a set of correlation output is generated which helps in a better averaging of the results of measurement. This technique further contributes to the enhancement of accuracy and range of displacement measurements.

Paper Details

Date Published: 29 April 1999
PDF: 6 pages
Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); doi: 10.1117/12.346766
Show Author Affiliations
Arvind Kumar, Indian Institute of Technology/Delhi (United States)
Renu Tripathi, Indian Institute of Technology/Delhi (India)
G. S. Pati, Indian Institute of Technology/Delhi (India)
Kehar Singh, Indian Institute of Technology/Delhi (India)

Published in SPIE Proceedings Vol. 3729:
Selected Papers from International Conference on Optics and Optoelectronics '98
Kehar Singh; Om Prakash Nijhawan; Arun Kumar Gupta; A. K. Musla, Editor(s)

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