Single 3D laser projector with speckle suppression  

作　　者：董磊 王安廷 杨福桂 王书路 许立新 顾春 明海 

机构地区：[1]Department of Optics and Optical Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China

出　　处：《Chinese Optics Letters》2013年第14期51-55,共5页中国光学快报（英文版）

摘　　要：In this letter, a new single three-dimensional （3D） laser projector is proposed. As liquid crystal （LC） can produce two image patterns with orthogonal polarization states at 120 Hz, only one projector is required in this approach for reconstruction of a 3D object. The light source is made up of RGB （red, green, and blue） lasers because laser has lots of advantages such as longer life, higher brightness, and larger color gamut. A novel diffusive media with good polarization-maintaining quality is used as rear projection screen for its high transmission efficiency （-90%） and low reflection efficiency. When laser incidents into the diffusive media, which contains lots of spherical particles with sizes between 2 and 15 μm, laser is scattered randomly and the laser speckle is reduced. A spatial phase mask is also inserted into the optical path to reduce speckle. With these techniques, the speckle contrast is reduced to 0.1 and the quality of image oatterns has been greatlv imoroved.In this letter, a new single three-dimensional （3D） laser projector is proposed. As liquid crystal （LC） can produce two image patterns with orthogonal polarization states at 120 Hz, only one projector is required in this approach for reconstruction of a 3D object. The light source is made up of RGB （red, green, and blue） lasers because laser has lots of advantages such as longer life, higher brightness, and larger color gamut. A novel diffusive media with good polarization-maintaining quality is used as rear projection screen for its high transmission efficiency （-90%） and low reflection efficiency. When laser incidents into the diffusive media, which contains lots of spherical particles with sizes between 2 and 15 μm, laser is scattered randomly and the laser speckle is reduced. A spatial phase mask is also inserted into the optical path to reduce speckle. With these techniques, the speckle contrast is reduced to 0.1 and the quality of image oatterns has been greatlv imoroved.

分 类 号：TN248[电子电信—物理电子学] TN946.1