Optical Review

, Volume 16, Issue 2, pp 160–166

Statistics of dynamic speckles in application to distance measurements

  • Alexei A. Kamshilin
  • Serguei V. Miridonov
  • Igor S. Sidorov
  • Dmitry V. Semenov
  • Ervin Nippolainen
Regular Papers

DOI: 10.1007/s10043-009-0027-2

Cite this article as:
Kamshilin, A.A., Miridonov, S.V., Sidorov, I.S. et al. OPT REV (2009) 16: 160. doi:10.1007/s10043-009-0027-2

Abstract

We present an analysis of statistical properties of dynamic speckles to estimate the limiting accuracy of measurements achievable in a distance sensor using spatially filtered dynamic speckles. The main reason for inaccurate measurements using dynamic speckles is their stochastic nature. It is shown that the average lifetime of dynamic speckles is the key factor defining the measurement accuracy. Main conclusions of the theoretical analysis were confirmed in an experiment carried out with a fast moving rough surface. Special attention is paid to a recently proposed range sensor using dynamic speckles generated by a fast-deflecting laser beam. It is shown that this sensor possesses the best combination of accuracy and response time.

Keywords

dynamic speckles accuracy of measurements distance measurements optical sensing spatial filtering 

Copyright information

© The Optical Society of Japan 2009

Authors and Affiliations

  • Alexei A. Kamshilin
    • 2
  • Serguei V. Miridonov
    • 1
  • Igor S. Sidorov
    • 2
  • Dmitry V. Semenov
    • 2
  • Ervin Nippolainen
    • 2
  1. 1.Optics DepartmentCentro de Investigación Científica y de Educación Superior de EnsenadaEnsenadaB.C. Mexico
  2. 2.Department of PhysicsUniversity of KuopioKuopioFinland

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