Laser Speckle Velocimeter Using A Zero-Crossing Technique For Spatially Integrated Intensity Fluctuation

Nobukatsu Takai; Toshiaki Iwai; Toshimitsu Asakura

doi:10.1117/12.7972711

1 April 1981 Laser Speckle Velocimeter Using A Zero-Crossing Technique For Spatially Integrated Intensity Fluctuation

Nobukatsu Takai, Toshiaki Iwai, Toshimitsu Asakura

Author Affiliations +

Optical Engineering, Vol. 20, Issue 2, 202320 (April 1981). https://doi.org/10.1117/12.7972711

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.

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Nobukatsu Takai, Toshiaki Iwai, and Toshimitsu Asakura "Laser Speckle Velocimeter Using A Zero-Crossing Technique For Spatially Integrated Intensity Fluctuation," Optical Engineering 20(2), 202320 (1 April 1981). https://doi.org/10.1117/12.7972711

Published: 1 April 1981

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