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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 22 — Aug. 1, 2014
  • pp: E38–E46

Efficient speckle reduction for a laser illuminating on a micro-vibrated paper screen

Shih-Yu Tu, Hoang Yan Lin, and Min-Ching Lin  »View Author Affiliations

Applied Optics, Vol. 53, Issue 22, pp. E38-E46 (2014)

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We have demonstrated an efficient speckle reduction method for laser illumination using a micro-vibrated paper screen along the projection direction. Using this method, a micro-vibrated amplitude of 0.532 μm, or a 2π phase change is sufficient to de-correlate the generated speckle pattern for a static SHG green laser beam image. When the measured speckle contrast is lowered to about 5.0%, and comparable with an LED source, a speckle-free image can be achieved. This technique will be suitable for compact and portable laser illumination equipment, image display, signal sensing devices, and so forth. Wearable and near-to-eye laser display applications are also included.

© 2014 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(030.4280) Coherence and statistical optics : Noise in imaging systems
(030.6140) Coherence and statistical optics : Speckle
(090.2820) Holography : Heads-up displays
(290.4210) Scattering : Multiple scattering
(290.2558) Scattering : Forward scattering

Original Manuscript: March 3, 2014
Revised Manuscript: May 3, 2014
Manuscript Accepted: May 13, 2014
Published: July 11, 2014

Shih-Yu Tu, Hoang Yan Lin, and Min-Ching Lin, "Efficient speckle reduction for a laser illuminating on a micro-vibrated paper screen," Appl. Opt. 53, E38-E46 (2014)

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