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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 2 — Jan. 21, 2008
  • pp: 1238–1249

Statistical properties of dynamic speckles formed by a deflecting laser beam

D. V. Semenov, S. V. Miridonov, E. Nippolainen, and A. A. Kamshilin  »View Author Affiliations

Optics Express, Vol. 16, Issue 2, pp. 1238-1249 (2008)

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We analyze statistical properties of dynamic speckles formed when an optically rough surface is illuminated by a fast-deflecting laser beam. The modified space-time correlation function of the light-intensity fluctuations has been introduced to estimate the correlation parameters of a dynamic speckle pattern. Dynamic speckles are considered in their application to range sensing using evaluation of the light-power-modulation frequency of a signal obtained from the integrating photodetector after spatial filtering of the scattered light. Multichannel configuration is suggested to improve the system accuracy. Conditions that should be fulfilled to get uncorrelated responses of photodiode are found. Proper averaging of the multichannel data allows designing a non-interferometric range sensor capable for measuring distance with accuracy of 1 εm during as short time as 1 ms.

© 2008 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Coherence and Statistical Optics

Original Manuscript: November 14, 2007
Revised Manuscript: December 26, 2007
Manuscript Accepted: January 15, 2008
Published: January 16, 2008

D. V. Semenov, S. V. Miridonov, E. Nippolainen, and A. A. Kamshilin, "Statistical properties of dynamic speckles formed by a deflecting laser beam," Opt. Express 16, 1238-1249 (2008)

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