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.
Optical fiber electronic speckle-pattern surface contouring using wavelength modulation of laser diodes
Fiber Optic Sensors IV ; 1990 ; The Hague,Netherlands
Proc. SPIE ; 1267
1990-08-01
Conference paper
Electronic Resource
English
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