P‐171: Laser Speckle Reduction Using MEMS Scanning Mirror | Zendy

Tong Zhaomin | Zendy; Akram Muhammad Nadeem | Zendy; Ouyang Guangmin | Zendy; Chen Xuyuan | Zendy; Kartashov Vladimir | Zendy

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P‐171: Laser Speckle Reduction Using MEMS Scanning Mirror

Author(s) -

Tong Zhaomin,

Akram Muhammad Nadeem,

Ouyang Guangmin,

Chen Xuyuan,

Kartashov Vladimir

Publication year - 2010

Publication title -

sid symposium digest of technical papers

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.351

H-Index - 44

eISSN - 2168-0159

pISSN - 0097-966X

DOI - 10.1889/1.3500389

Subject(s) - speckle pattern , optics , microelectromechanical systems , scattering , materials science , laser , reduction (mathematics) , light scattering , physics , optoelectronics , mathematics , geometry

Laser beams reflected from a MEMS scanning mirror introduce movable scattering spots onto a Random Phase Plate (RPP), and the scattering lights after the RPP are homogenized by a hexagonal light pipe. A rough transmission object is placed closely after the light pipe, and the real‐time changeable speckle patterns are added together within the exposure time of a CCD camera. Speckle is suppressed and 0.0673 minimum speckle Contrast Ratio (CR) is obtained.

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