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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 23 — Aug. 10, 2010
  • pp: 4385–4391

Very efficient speckle contrast reduction realized by moving diffuser device

Shigeo Kubota and Joseph W. Goodman  »View Author Affiliations


Applied Optics, Vol. 49, Issue 23, pp. 4385-4391 (2010)
http://dx.doi.org/10.1364/AO.49.004385


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Abstract

Speckle noise reduction is best tested on a precise speckle contrast measurement bench, which should be able to measure 100% contrast in fully developed speckle as well as the smallest contrast (for example, less than 10%) after its reduction. On such a test bench, we have measured very efficient speckle contrast reduction by temporal averaging using a moving diffuser on a tuning fork, which vibrates at 100 Hz over 60 μm in amplitude, a distance that is three times the surface roughness correlation length of the diffuser.

© 2010 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(040.1520) Detectors : CCD, charge-coupled device
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(290.5880) Scattering : Scattering, rough surfaces

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: June 9, 2010
Manuscript Accepted: July 11, 2010
Published: August 4, 2010

Citation
Shigeo Kubota and Joseph W. Goodman, "Very efficient speckle contrast reduction realized by moving diffuser device," Appl. Opt. 49, 4385-4391 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-23-4385


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