Simulation of laser speckle reduction by using an array of diffraction gratings

Z. M. Tong; G. M. Ouyang; W. H. Gao; M. N. Akram; V. Kartashov; K. Y. Wang; X. Y. Chen

doi:10.1117/12.868999

13 September 2010 Simulation of laser speckle reduction by using an array of diffraction gratings

Z. M. Tong, G. M. Ouyang, W. H. Gao, M. N. Akram, V. Kartashov, K. Y. Wang, X. Y. Chen

Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73871S (2010) https://doi.org/10.1117/12.868999
Event: Speckle 2010, 2010, Florianapolis, Brazil

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.

Citation Download Citation

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); https://doi.org/10.1117/12.868999

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