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Optical Engineering

Laser Speckle Velocimeter Using A Zero-Crossing Technique For Spatially Integrated Intensity Fluctuation
Author(s): Nobukatsu Takai; Toshiaki Iwai; Toshimitsu Asakura
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Paper Abstract

The laser speckle velocimeter based on the zero-crossing rate of the spatially integrated speckle intensity variations is studied under various optical configurations of illumination and detection. The eliminating method of the additional noise is also experimentally investigated by using Schmitt trigger circuits for the counting of zero-crossings.

Paper Details

Date Published: 1 April 1981
PDF: 5 pages
Opt. Eng. 20(2) 202320 doi: 10.1117/12.7972711
Published in: Optical Engineering Volume 20, Issue 2
Show Author Affiliations
Nobukatsu Takai, Hokkaido University (Japan)
Toshiaki Iwai, Hokkaido University (Japan)
Toshimitsu Asakura, Hokkaido University (Japan)


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