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

Date published

1990-12-31T00:00:00Z

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International Society for Optical Engineering; 1999

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Article

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0277-786X

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RP Tatam, JC Davies, CH Buckberry and JDC Jones. Electronic speckle pattern surface contouring using optical fibres and wavelength modulation of laser diodes. Proceedings of SPIE : Conference on Fiber Optics, 24-26 April 1990, Volume 1314, pp. 278-283

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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