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13 September 2010 Simulation of laser speckle reduction by using an array of diffraction gratings
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Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73871S (2010)
Event: Speckle 2010, 2010, Florianapolis, Brazil
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.
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Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, and X. Y. Chen "Simulation of laser speckle reduction by using an array of diffraction gratings", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871S (13 September 2010);

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