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| 利用CMOS图像传感器测试成像镜头MTF的实用方法 |
| A practical method for measuring modulation transfer function of optical imaging system by using CMOS imager sensor |
| 修订日期：2006-01-05 |
| DOI： |
| 中文关键词: 调制传递函数 CMOS图像传感器 像素灰度值 参考空间频率 |
| 英文关键词:modulation transfer function(MTF),CMOS imager sensor,pixel value,reference frequency |
| 基金项目: |
| 张文华 李湘宁 |
| 上海理工大学 上海200093 |
| 摘要点击次数: 2889 |
| 全文下载次数: 16 |
| 中文摘要: |
| 介绍了一种用CMOS图像传感器测量镜头MTF的实用方法及其实用实例.该方法通过引入参考空间频率,利用在CMOS图像传感器像面上,对被测空间频率与参考空间频率的像素灰度值的读取,能够便捷并且比较准确地测定镜头的MTF值.由于参考空间频率的引入,大体消除了CMOS图像传感器本身MTF对测量结果的影响,从而使测量结果更接近理论运算结果. |
| 英文摘要: |
| This paper introduces a practical method for measuring modulation transfer function(MTF) of an optical imaging system by using CMOS imager sensor.This method brings in a new conception of reference frequency. By reading the pixel values which reference frequency and tested frequency make on the CMOS imager sensor through the optical imaging system,this method can calculate out the MTF of the optical imaging system promptly and accurately.The reference frequency can eliminate most of the impact CMOS imager sensor itself makes to the system MTF and therefore make the MTF values more accurate. |
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