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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 27 — Sep. 20, 2014
  • pp: G157–G162

Laser speckle reduction by phase range limited computer generated hologram in laser projection display system

Yan-Shuo Chang, Chia-Hsin Lin, Ku-Hui Hsu, Wei-Feng Hsu, Li-Jen Hsiao, and Hoang Yan Lin  »View Author Affiliations


Applied Optics, Vol. 53, Issue 27, pp. G157-G162 (2014)
http://dx.doi.org/10.1364/AO.53.00G157


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Abstract

The speckle phenomenon is an annoyance in laser projection display systems. We propose a novel speckle suppression method that utilizes the interference concept on a pixel point, which reduces the speckle contrast (SC) of the project image by limiting the phase distribution range in the optical field. The SC formula is derived in the uniform interval phase range for partially developed speckle conditions, showing that the SC can be lowered by lessening the phase range limitation. In the ideal simulation model, the SC can be reduced from 98.77% to 0% as the phase range limitation varies from 2π to 0. The phase range limitation model is a novel method using a computer generated hologram to provide beam shaping and phase limitation. In a more realistic simulation model, the SC is reduced from 99.18% to 16.68%.

© 2014 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging
(170.0110) Medical optics and biotechnology : Imaging systems
(170.3010) Medical optics and biotechnology : Image reconstruction techniques

History
Original Manuscript: May 2, 2014
Revised Manuscript: June 28, 2014
Manuscript Accepted: June 30, 2014
Published: August 14, 2014

Virtual Issues
Vol. 9, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Yan-Shuo Chang, Chia-Hsin Lin, Ku-Hui Hsu, Wei-Feng Hsu, Li-Jen Hsiao, and Hoang Yan Lin, "Laser speckle reduction by phase range limited computer generated hologram in laser projection display system," Appl. Opt. 53, G157-G162 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-27-G157

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