应用CCD的投影物镜调制传递函数测量系统  

Measurement System of Projection Lens Based on CCD Modulation Transfer Function

作　　者：周杰[1] 邱胜根[1] 刘旭[1] 李海峰[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,杭州310027

出　　处：《光学学报》2004年第2期260-263,共4页Acta Optica Sinica

摘　　要：调制传递函数是评价光学成像系统成像质量的重要方法 ,因而测量光学系统的调制传递函数在各种成像光学系统生产实践中具有相当重要的作用。但是长期以来 ,投影显示设备的生产中缺少能够定量的检测投影物镜性能的标准化方法。根据线性系统和傅里叶变换的理论 ,结合液晶投影机投影物镜生产、检测的实际需要 ,提出了应用CCD图像采集系统的投影物镜调制传递函数测量方法 ,为生产实践提供了可行的定量判断投影物镜性能的手段。给出了实际物镜的检测结果 ,并与物镜的设计参量进行了比较 ,同时对影响系统测量精度的一些因素进行了分析。Modulation transfer function is a common method for evaluating the performance of optical imaging system. The measurement of MTF is very important in production and testing. But there is no standard quantitative method for the measurement of projection lens in the production of projection display system. A new method of measuring LCD projection lens' MTF with CCD imaging system placed on the image plane is introduced. The method is based on the theory of Fourier transform and linear system, and can provide a quantified standard for lens measurement. At the end, the testing results of some practical objective lenses are presented and compared with the designed MTF. Factors that will affect system accuracy are also analyzed here.

关 键 词：应用光学 液晶投影显示 调制传递函数 傅里叶变换 CCD 卷积 瑞利判据 数据测量 

分 类 号：TH741.5[机械工程—光学工程]