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Contouring by laser speckles

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Abstract

Two methods exist whereby contour lines of an object can be generated using laser speckles.1,2 The first employs lasers of two wavelengths to create depth contours, and the second uses two immersion fluids with different refraction Index to yield slope contours. In this paper we present a method whereby depth contours can be generated by simply tilting the object between exposures.

© 1981 Optical Society of America

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