Article citationsMore>>
J. I. Trisnadi, “Hadamard Speckle Contrast Reduction,” Optics Letters, Vol. 29, No. 1, 2004, pp. 11-13.
doi:10.1364/OL.29.000011
has been cited by the following article:
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TITLE:
Speckle Reduction in Imaging Projection Systems
AUTHORS:
Weston Thomas, Christopher Middlebrook
KEYWORDS:
Diffractive Diffusers; Speckle Contrast Reduction; Laser Pico-Projectors
JOURNAL NAME:
Optics and Photonics Journal,
Vol.2 No.4,
December
31,
2012
ABSTRACT: Diffractive diffusers (phase gratings) are routinely
used for homogenizing and beam shaping for laser beam applications. Another use
for diffractive diffusers is in the reduction of speckle for pico-projection
systems. While diffusers are unable to completely eliminate speckle they can be
utilized to decrease the resultant contrast to provide a more visually
acceptable image. Research has been conducted to quantify and measure the
diffusers overall ability in speckle reduction. A theoretical Fourier optics
model is used to provide the diffuser’s stationary and in-motion performance in
terms of the resultant contrast level. Contrast measurements of two diffractive
diffusers are calculated theoretically and compared with experimental results.
Having a working theoretical model to accurately predict the performance of the
diffractive diffuser allows for the verification of new diffuser designs
specifically for pico-projection system applications.