CCD非线性及其校正研究  

Nonlinearity of CCD and Its Adjustment

作　　者：乔闹生[1] 

机构地区：[1]湖南文理学院物理与电子科学学院,湖南常德415000

出　　处：《光子学报》2008年第11期2305-2309,共5页Acta Photonica Sinica

基　　金：湖南省教育厅科研基金(08C617);湖南省"十一五"重点建设学科--光学基金和湖南文理学院科研重点项目(JJZD0702)资助

摘　　要：分析了CCD非线性产生的原因,提出了CCD非线性校正的新方法——多点多段线性逼近法.给出了CCD非线性产生及校正方法的简单公式推导及物理解释.通过计算机模拟和实验进一步验证了CCD非线性校正之后,明显地减小了γ级频谱的产生.模拟情况下物体面形恢复后的标准偏差明显减小:未校正时为0.0407mm,校正之后时为0.0252mm;实验情况下校正之后的物体恢复面形效果明显优于未校正时的效果.The reason for the nonlinearity of CCD was analyzed, and then a method to adjust the nonlinearity was introduced. Finally , the simple analytical deduction and physical explain were given. After adjusting the nonlinearity of the CCD,the standard error of the shape for the object becomes 0. 025 2 mm while it was 0. 040 7 mm without adjusting. The result shows that, the standard error and the step spectrum and decrease obviously,and the shape for the object is superior to that without adjusting.

关 键 词：傅里叶变换轮廓术 CCD非线性 校正方法 γ级频谱 

分 类 号：O438.2[机械工程—光学工程] TN386.5[理学—光学]