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Applied Optics

Applied Optics


  • Vol. 33, Iss. 35 — Dec. 10, 1994
  • pp: 8240–8250

Average speckle size as a function of intensity threshold level: comparison of experimental measurements with theory

Terri L. Alexander, James E. Harvey, and Arthur R. Weeks  »View Author Affiliations

Applied Optics, Vol. 33, Issue 35, pp. 8240-8250 (1994)

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Speckle phenomena result whenever spatially coherent radiation is reflected from a rough surface or propagated through a random medium such as atmospheric turbulence. Speckle characteristics are therefore a major concern in many laser-imaging or wave-propagation applications. We present the results of experimental measurements of target-induced speckle patterns produced in the laboratory from a variety of targets and illumination conditions. We then compare these experimental measurements with a theoretical model for the average speckle size as a function of intensity threshold level. Excellent agreement is obtained for intensity threshold levels greater than approximately twice the mean intensity level.

© 1994 Optical Society of America

Original Manuscript: March 7, 1994
Revised Manuscript: July 5, 1994
Published: December 10, 1994

Terri L. Alexander, James E. Harvey, and Arthur R. Weeks, "Average speckle size as a function of intensity threshold level: comparison of experimental measurements with theory," Appl. Opt. 33, 8240-8250 (1994)

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