应用光学, 2012, 33 (5): 1006, 网络出版: 2012-11-26
光纤倒像器调制传递函数测试结果的加权修正
Weighted correction for MTF of fiber-optic image inverter
摘要
狭缝式调制传递函数测试系统可以测试光纤倒像器的调制传递函数,但由于测试过程中较多的人工参与,使得调制传递函数测试结果的重复性较差。针对影响光纤倒像器调制传递函数测试重复性的数据采样、积分时间以及人眼疲劳特性进行了分析,给出了针对数据采样和积分时间的解决方法,针对人眼疲劳特性提出了基于人眼时间递增因子的加权修正方法。对6块光纤倒像器的调制传递函数进行了三批次测试,并对测试结果进行了直接校正和加权修正的比较,结果表明:加权修正较好地解决了测试重复性问题,被测6块光纤倒像器加权修正后的调制传递函数最大重复性偏差不超过7%。
Abstract
As an optical component for transferring image, fiber-optic image inverter has been extensively used in low-light-level image intensifier. The modulation transfer function (MTF) test system, on which slit is used, can be used to test the fiber-optic inverters MTF. But there is too much artificial participation during MTF testing, and the repeatability of inverters MTF is generally bad. Data sampling, integrating time and eyestrain which affected the repeatability of inverters MTF were respectively analyzed, the solution related to data sampling and integrating time was given, and the weighted correction method for eyestrain was presented. According to the six fiber-optic inverters MTF testing results and the comparison between direct correction and weighted correction of them, it is shown that the weighted correction solves the repeatability of inverters MTF well, and the maximum deviation for repeatability is less than 7%.
拜晓锋, 石峰, 吕峰, 程宏昌, 贺英萍, 尹雷. 光纤倒像器调制传递函数测试结果的加权修正[J]. 应用光学, 2012, 33(5): 1006. BAI Xiao-feng, SHI Feng, LV Feng, CHENG Hong-chang, HE Ying-ping, YIN Lei. Weighted correction for MTF of fiber-optic image inverter[J]. Journal of Applied Optics, 2012, 33(5): 1006.