Tatam, Ralph P.Davies, Jeremy C.Buckberry, Clive H.Jones, Julian D. C.2012-07-132012-07-131990-12-31RP 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. 278-28308194036520277-786Xhttp://dx.doi.org/10.1117/12.21989http://dspace.lib.cranfield.ac.uk/handle/1826/5722The 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.Article