## Dynamic statistical properties of laser speckle produced by a moving diffuse object under illumination of a Gaussian beam

JOSA, Vol. 72, Issue 4, pp. 460-467 (1982)

http://dx.doi.org/10.1364/JOSA.72.000460

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### Abstract

The dynamic statistical properties of laser speckle produced in the far-field diffraction region by a diffuse object moving in an arbitrary direction of three-dimensional space under illumination of a Gaussian beam are investigated theoretically and experimentally. It is found that the time-varying speckle intensity detected at the center of the far-field diffraction plane is a stationary random process with respect to time. The dependence of the autocorrelation function of the time-varying speckle-intensity fluctuation on both lateral and longitudinal components of the object velocity is studied in some detail by evaluating numerically the resultant equation of the time-varying speckle-intensity correlation. To confirm the theoretical results, an experiment has been performed. Good agreement between the theoretical and experimental results is obtained for the autocorrelation function of the timevarying speckle-intensity fluctuation that is due to three-dimensional translation of the diffuse object.

© 1982 Optical Society of America

**Citation**

T. Iwai, N. Takai, and T. Asakura, "Dynamic statistical properties of laser speckle produced by a moving diffuse object under illumination of a Gaussian beam," J. Opt. Soc. Am. **72**, 460-467 (1982)

http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-72-4-460

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