Polychromatic light-based photorefractive correlator for 3D motion measurement

Arvind Kumar; Renu Tripathi; G. S. Pati; Kehar Singh

doi:10.1117/12.346766

29 April 1999 Polychromatic light-based photorefractive correlator for 3D motion measurement

Arvind Kumar, Renu Tripathi, G. S. Pati, Kehar Singh

Proceedings Volume 3729, Selected Papers from International Conference on Optics and Optoelectronics '98; (1999) https://doi.org/10.1117/12.346766
Event: Selected Papers from the International Conference on Optics and Optoelectronics, 1998, Dehradun, India

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.

Citation Download Citation

Arvind Kumar, Renu Tripathi, G. S. Pati, and Kehar Singh "Polychromatic light-based photorefractive correlator for 3D motion measurement", Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); https://doi.org/10.1117/12.346766

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