Electronic speckle pattern surface contouring using optical fibres and wavelength modulation of laser diodes

Ralph P. Tatam; Jeremy C. Davies; Clive H. Buckberry; Julian D. C. Jones

doi:10.1117/12.21989

1 September 1990 Electronic speckle pattern surface contouring using optical fibres and wavelength modulation of laser diodes

Ralph P. Tatam, Jeremy C. Davies, Clive H. Buckberry, Julian D. C. Jones

Author Affiliations +

Proceedings Volume 1314, Fibre Optics '90; (1990) https://doi.org/10.1117/12.21989
Event: Fibre Optics '90, 1990, London, United Kingdom

Abstract

The incorporation of laser diodes and monomode fibre optics into an Electronic Speckle Pattern Interferometer (ESPI) has led to the development of a novel holographic surface contouring system. Height contours are obtained by switching between two laser wavelengths. Contour intervals from 0.5-5 mm have been generated by modulating the injection current of a single laser diode source and are demonstrated on an automotive disc brake hub.

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Ralph P. Tatam, Jeremy C. Davies, Clive H. Buckberry, and Julian D. C. Jones "Electronic speckle pattern surface contouring using optical fibres and wavelength modulation of laser diodes", Proc. SPIE 1314, Fibre Optics '90, (1 September 1990); https://doi.org/10.1117/12.21989

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