标题: Speckle reduction using deformable mirrors with diffusers in a laser pico-projector
作者: Chen, Hsuan-An
Pan, Jui-Wen
Yang, Zu-Po
光电系统研究所
影像与生医光电研究所
生医电子转译研究中心
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
Biomedical Electronics Translational Research Center
公开日期: 24-七月-2017
摘要: We propose a design for speckle reduction in a laser pico-projector adopting diffusers and deformable mirrors. This research focuses on speckle noise suppression by changing the angle of divergence of the diffuser. Moreover, the speckle contrast value can be further reduced by the addition of a deformable mirror. The speckle reduction ability obtained using diffusers with different divergence angles is compared. Three types of diffuser designs are compared in the experiments. For Type 1 which uses a circular symmetric diffuser the speckle contrast value can be decreased to 0.0264. For Type 2, the speckle contrast value can be reduced to 0.0267 because of the inclusion of an elliptical distribution diffuser. With Type 3 which includes a combination of the circular distribution diffuser and elliptical distribution diffuser, the speckle contrast value can be reduced to 0.0236. For all three types, the speckle contrast value is lower than 0.05. Under this speckle value, the speckle phenomenon is invisible to the human eye. (C)2017 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.25.018140
http://hdl.handle.net/11536/145985
ISSN: 1094-4087
DOI: 10.1364/OE.25.018140
期刊: OPTICS EXPRESS
Volume: 25
Issue: 15
起始页: 18140
结束页: 18151
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