基于硅基液晶微显示立体投影光学引擎的设计

从平衡两路图像对比度的角度，采用双硅基液晶(LCoS)芯片设计了一种实用的微型立体投影光学引擎。光学引擎中双LCoS芯片分别用于调制左右眼的图像，一个白光LED作为投影光源，两个标准的MacNeille偏振分光棱镜(PBS)用于产生两路偏振方向相互垂直的高偏振度光束。整个引擎设计简单，结构紧凑，其尺寸约为105 mm×28 mm×25 mm。测量了本设计中光学引擎的各部件的实际参数值，根据所测量的数据通过理论计算得到：左右两光路的对比度完全平衡且均为641，光效率均为3.61%，整机的光通量为20 lm。

Abstract

From the view of balancing the contrast of two imaging optical paths, a practical mini-optical engine of liquid crystal on silicon (LCoS) stereoscopic projector is designed. The engine is composed of two LCoS panels to modulate the left and right images respectively, with a white LED as light source and two standard MacNeille polarization beam splitter (PBS) to generate two linear polarized beams with orthogonal polarized state. The whole optical engine has a simple design and compact structure with the size of 105 mm×28 mm×25 mm. Actual parameters of every part in our optical engine are measured. Based on these values, the calculated contrast and the light efficiencies of the right and left eye paths are 641 and 3.61% respectively, and the total light flux is about 20 lm.

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孙辉岭, 赵宇, 高志强, 程炎, 杨伟梁. 基于硅基液晶微显示立体投影光学引擎的设计[J]. 光学学报, 2012, 32(2): 0222004. Sun Huiling, Zhao Yu, Gao Zhiqiang, Cyan Cheng, Steve Yeung. Optical Engine Design of Stereoscopic Projection Based on LCoS Micro-Display[J]. Acta Optica Sinica, 2012, 32(2): 0222004.

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