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Visual speckle technique for alignment and centering of a translucent rough surface

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Abstract

A simple visual method is described which is based on the direct analysis of speckle pattern movement. It permits aligning a transparent diffuser, placing its rotation axis on the mean plane of the rough surface and simultaneously determining the optical axis. As a consequence, the direction of the illuminating light beam can be determined.

© 1989 Optical Society of America

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