Abstract

The dynamic statistical properties of laser speckle produced in the far-field diffraction region from a diffuse object moving longitudinally along the optical axis under illumination of a Gaussian beam are investigated theoretically and experimentally. Although the spatial structure of speckle patterns varies in time owing to the longitudinal motion of the object, the time-varying speckle intensity detected at the center of the far-field diffraction plane is found to follow a statistically stationary variation. The autocorrelation function and power spectral density of the speckle intensity variations are studied with relation to the illuminating condition of the Gaussian beam.

© 1980 Optical Society of America

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

T. Iwai, N. Takai, and T. Asakura
J. Opt. Soc. Am. 72(4) 460-467 (1982)

Space–time correlation properties of dynamic laser speckle in the near diffraction field of a longitudinally moving diffuse object

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J. Opt. Soc. Am. A 6(6) 758-764 (1989)

Real-time velocity measurement for a diffuse object using zero-crossings of laser speckle

N. Takai, T. Iwai, and T. Asakura
J. Opt. Soc. Am. 70(4) 450-455 (1980)

Correlation distance of dynamic speckles

N. Takai, T. Iwai, and T. Asakura
Appl. Opt. 22(1) 170-177 (1983)

Statistical properties of dynamic speckles in application to laser focusing systems

Zhan Yu, Jin Guo, Lisheng Liu, Tingfeng Wang, and Yuanyang Li
Appl. Opt. 58(12) 3310-3316 (2019)