视频光学传递函数测试中的系统参数设置  

System parameter setting in video OTF test

作　　者：马卫红[1] 马臻[1] 贺丽[1] 李英才[1] 

机构地区：[1]中科院西安光精密机械研究所空间室

出　　处：《光子学报》2005年第5期765-768,共4页Acta Photonica Sinica

摘　　要：通过对针孔像的处理和分析,获得了被测系统的光学传递函数,分析了采样频率对测试精度的影响,提出了用栅条板标定频率换算尺度和针孔像采样频率的方法 对50mm焦距平凸标准物镜的测试结果表明,系统参数的标定和输入直接影响测试精度,采用本文提出的标定方法准确可靠,可以在测试组件参数未知的情况下,获得影响空间频率换算的参数,进而准确获得被测系统的光学传递函数。OTF of under test lens was tested with pinhole image processing and analyzing, the influences of sampling frequency on test precision were analyzed, and a calibration method of frequency conversion scale and sampling frequency on image plane was presented. The test results on 50 mm focus standard lens showed that the accurately calibration and import of system setting parameter effect on test precision directly, calibration method in this paper are accurate and reliable, and can acquire parameter of effecting on spatial frequency calibration and OTF of lens under test accurately, without knowing subsystem parameter.

关 键 词：光学传递函数 空间频率 图像分析 测试精度 

分 类 号：O348.1[理学—固体力学]