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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 1 — Jan. 5, 2009
  • pp: 92–103

Speckle suppression in laser display using several partially coherent beams

Seungdo An, Anatoliy Lapchuk, Victor Yurlov, Jonghyeong Song, HeungWoo Park, Jaewook Jang, Woocheol Shin, Sergey Kargapoltsev, and Sang Kyeong Yun  »View Author Affiliations


Optics Express, Vol. 17, Issue 1, pp. 92-103 (2009)
http://dx.doi.org/10.1364/OE.17.000092


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Abstract

An optical scheme for speckle suppression using two or three partially coherent beams in a projection system is proposed. Diffractive optical elements (DOE) placed in the intermediate image plane create several beams carrying the image to a screen. Transparent plates of different thicknesses are placed in the Fourier plane of the projective lens and used for beam decorrelation. The coherence matrix algorithm for speckle suppression is used to calculate the speckle contrast ratio. It is shown that for a small decorrelation length and using the same maximum thickness of the transparent plates, two partially coherent beams would provide better suppression than three beams with different diffraction orders. However, for a large decorrelation length, the three beam setup provides better speckle suppression for all three colors examined with a suppression coefficient close to theoretical limits. Verification of speckle suppression using three-beam decorrelation is reported.

© 2009 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(050.1950) Diffraction and gratings : Diffraction gratings
(080.2740) Geometric optics : Geometric optical design

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: November 6, 2008
Revised Manuscript: December 8, 2008
Manuscript Accepted: December 19, 2008
Published: December 22, 2008

Citation
Seungdo An, Anatoliy Lapchuk, Victor Yurlov, Jonghyeong Song, HeungWoo Park, Jaewook Jang, Woocheol Shin, Sergey Karpoltsev, and Sang Kyeong Yun, "Speckle suppression in laser display using several partially coherent beams," Opt. Express 17, 92-103 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-1-92


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