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Proceedings Paper

Spatial Coherence Control Of A Laser Beam By Ultrasonic Waves And Its Applications
Author(s): Yoshihiro Ohtsuka
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Paper Abstract

A proposal is made of an attempt to control the coherence condition of illumination by ultrasonic waves. A progressive ultrasonic wave acts to change the spatial coherence factor periodically in a Raman - Nath regime. Some improvements are performed in a problem of two-point resolution as well as in a speckle removal with a phase-modulated laser beam. A randomly frequency-modulated ultrasonic wave allows us to obtain a decreasing coherence factor.

Paper Details

Date Published: 25 October 1979
PDF: 4 pages
Proc. SPIE 0194, Applications of Optical Coherence, (25 October 1979); doi: 10.1117/12.957917
Show Author Affiliations
Yoshihiro Ohtsuka, Hokkaido University (Japan)

Published in SPIE Proceedings Vol. 0194:
Applications of Optical Coherence
William H. Carter, Editor(s)

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