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Proceedings Paper

Simulation of laser speckle reduction by using an array of diffraction gratings
Author(s): Z. M. Tong; G. M. Ouyang; W. H. Gao; M. N. Akram; V. Kartashov; K. Y. Wang; X. Y. Chen
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Paper Abstract

An array of diffraction gratings and a Random Phase Plate (RPP) are used to suppress laser speckle effect. Dynamic diffraction spots are generated on the surface of the RPP, after which the scattering lights are perceived by a detector. Speckle Contrast Ratio (CR) and Number of Independent Speckle Patterns (NISP) with different gratings rotation orientations (θ), gratings frequencies (grooves per millimeter: f), diameters of laser beam (D), and distances between the array of diffraction gratings and the RPP (Z) are calculated based on ZEMAX simulations, and an optimized model is proposed.

Paper Details

Date Published: 13 September 2010
PDF: 6 pages
Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871S (13 September 2010); doi: 10.1117/12.868999
Show Author Affiliations
Z. M. Tong, Vestfold Univ. College (Norway)
G. M. Ouyang, Vestfold Univ. College (Norway)
W. H. Gao, Vestfold Univ. College (Norway)
M. N. Akram, Vestfold Univ. College (Norway)
V. Kartashov, poLight AS (Norway)
K. Y. Wang, Vestfold Univ. College (Norway)
X. Y. Chen, Vestfold Univ. College (Norway)

Published in SPIE Proceedings Vol. 7387:
Speckle 2010: Optical Metrology
Armando Albertazzi Goncalves Jr.; Guillermo H. Kaufmann, Editor(s)

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