硅基液晶投影系统的LED光源照明系统设计

发布时间：2018-01-13 07:48

本文关键词：硅基液晶投影系统的LED光源照明系统设计　出处：《激光与光电子学进展》2014年07期 　论文类型：期刊论文

【摘要】：硅基液晶(LCOS)空间光调制器件的特点是反射光成像,要求照明光束发散角小,均匀性好。对此,设计了由抛物型反光碗、复眼透镜、偏振分光棱镜、聚光镜等组成的用于LCOS的照明系统,对抛物反光碗以及复眼透镜各参数的设计原理做了详细分析,具体包括光源出射角度,光源的总体长度,所需均匀照亮的尺寸,抛物反光碗各参数对出射角度的影响,其实现原理主要包括复眼透镜匀光理论。设计要求光源出射角度小于10°,总体长度为220 mm,均匀照明面积为20 mm×20 mm,最后给出聚光透镜组的设计结果,使光线聚焦到LCOS表面,照度值要达到0.35 lx/m2,其不均匀度在15%以内。进一步使用Lighttools软件,对其进行仿真,由照度曲线图和照度栅格图可知,设计结果满足设计要求。
[Abstract]:Liquid crystal on silicon (LCOS) characteristics of spatial light modulator is reflected light imaging, lighting requirements of small beam divergence angle, good uniformity. In this regard, designed by parabolic reflector, eye lens, polarizing prism, illumination system for LCOS condenser and other components of the design principle of parabolic reflector and eye lens parameters are analyzed in detail, including the light emitting angle, the overall length of the light source, the light uniform size, parabolic reflector parameters on impact angle, its principle is mainly including the eye lens dodging theory. Design of light emitting angle less than 10 degrees, the overall length 220 mm uniform illumination area of 20 mm * 20 mm, finally gives the design results of the condenser lens group, the light focusing on the surface of LCOS illumination value to reach 0.35 lx/m2, the uniformity is less than 15%. The further use of Lighttools software, The simulation results show that the design results meet the design requirements by the illuminance curve and the illumination grid.

【作者单位】：长春理工大学光电工程学院;吉林省光电测控仪器工程技术研究中心;
【分类号】：TN946.1
【正文快照】： 1引言硅基液晶(LCOS)在硅芯片上加工而成。LCOS的像素尺寸可以达到7~20 mm,所以其解析度非常高。072201-LCOS采用反射式投射,光能利用率可达到40%,具有体积小、开口率高、制造技术较成熟等特点。利用半导体制作的驱动面板,在电晶体上通过研磨技术磨平,并镀上铝膜当作反射镜,形

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