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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 17 — Sep. 1, 2010
  • pp: 2852–2854

Speckle reduction using a motionless diffractive optical element

Guangmin Ouyang, Zhaomin Tong, M. Nadeem Akram, Kaiying Wang, Vladimir Kartashov, Xin Yan, and Xuyuan Chen  »View Author Affiliations


Optics Letters, Vol. 35, Issue 17, pp. 2852-2854 (2010)
http://dx.doi.org/10.1364/OL.35.002852


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Abstract

Speckle reduction by moving diffuser has been previously studied in display systems with coherent light sources, such as lasers. In this Letter, we propose a motionless diffractive optical element (DOE) for speckle reduction. The DOE was designed based on finite-element method simulations, fabricated using micromachining technology, and characterized for despeckle efficiency. Experiments using a DOE with two gratings have indicated that the speckle was suppressed to 50%, which shows fair agreement with theoretical analysis. With some modification of this DOE, the speckle noise can be reduced to 10% according to the theory.

© 2010 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(110.6150) Imaging systems : Speckle imaging
(130.3990) Integrated optics : Micro-optical devices

ToC Category:
Imaging Systems

History
Original Manuscript: May 21, 2010
Revised Manuscript: July 13, 2010
Manuscript Accepted: July 31, 2010
Published: August 19, 2010

Citation
Guangmin Ouyang, Zhaomin Tong, M. Nadeem Akram, Kaiying Wang, Vladimir Kartashov, Xin Yan, and Xuyuan Chen, "Speckle reduction using a motionless diffractive optical element," Opt. Lett. 35, 2852-2854 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-17-2852

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