LCOS大屏幕薄型背投电视广角投影物镜的设计  

Wide Angle Projection Lens for LCOS Rear-Projection TV of Large Screen and Thin Structure

作　　者：陆国华[1] 沈为民[1] 

机构地区：[1]苏州大学现代光学研究所江苏省现代光学技术重点实验室,江苏苏州215006

出　　处：《光子学报》2009年第3期601-604,共4页Acta Photonica Sinica

基　　金：江苏省现代光学技术重点实验室开放课题(KJS05014)资助

摘　　要：为了满足67英寸大屏幕LCOS背投电视的需要,设计了一款广角投影物镜.此广角投影镜头采用远心反远距结构,通过合理选用非球面和光学材料,设计的镜头具有视场大、投影距离短、工作距离长、相对孔径大、无渐晕、辐照度均匀等优点.在LCOS芯片奈奎斯特空间频率处的调制传递函数值高于0.5,色差仅约1/4像元,畸变低于5‰.A wide angle projection lens was designed to meet the requirement of LCOS rear-projection TV with 67 ″ screen. The projection lens adopt telecentric and retrofocus structure,the optical materials were chosen appropriately, and several aspheric surfaces were placed in reasonable position. It has many advantages such as large field of view, short projection distance, long working distance, high relative aperture,non-vignetting,uniform irradiance and so on. The lens has high image quality, its MTF value at Nyquist frequency of the used LCOS chip is higher than 0.5. Its lateral chromatic aberration is about one fourth of a pixel, and the distortion is less than 0. 5 percent.

关 键 词：光学设计 广角投影物镜 背投 远心反远距结构 像质评价 

分 类 号：O439[机械工程—光学工程]