Holographic surface contouring using wavelength modulation of laser diodes

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 h...

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Bibliographic Details
Published in:Optics and laser technology 1990-10, Vol.22 (5), p.317-321
Main Authors: Tatam, R.P., Davies, J.C., Buckberry, C.H., Jones, J.D.C.
Format: Article
Language:English
Subjects:
ESPI
Exact sciences and technology
fibre optics
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
lasers (diode)
Physics
surface contouring
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Summary: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.
ISSN:0030-3992
1879-2545
DOI:10.1016/0030-3992(90)90073-D