CCD的非线性与频谱混叠的关系研究  

Study of the Relationship Between Nonlinearity of CCD and Frequency Overlapping

作　　者：乔闹生[1] 蔡新华[1] 彭光含[1] 

机构地区：[1]湖南文理学院物理与电子科学系,湖南常德415000

出　　处：《光子学报》2007年第4期603-608,共6页Acta Photonica Sinica

基　　金：湖南省"十一五"重点建设科学-光学基金资助

摘　　要：分析了CCD的非线性产生频谱混叠问题,提出了减小频谱混叠的方法.从理论上分析了CCD的非线性产生高频分量的原因,给出了简单的物理解释和解析推导.通过计算机仿真与实验两种方法得出了CCD的非线性导致频谱混叠的结果,再通过计算机仿真方法得出结论:在存在高级次频谱成份的情况下,加密抽样可减少频谱混叠并明显提高FTP的测量准确度.　The overlapping spectrum caused by the nonlinearity of CCD was analyzed,and the way of reducing overlapping spectrum was presented.The cause to high order spectrum produced by the nonlinearity of CCD was analyzed through theory.The simple physical explain and analytical deduction was given,and also results of overlapping spectrum were given through simulation of computer and experiment.The results of simulation of computer show that the measurement precision of FTP can be improved obviously by denser sampling.

关 键 词：傅里叶变换轮廓术(FTP) CCD的非线性 频谱混叠 抽样 

分 类 号：O438.2[机械工程—光学工程]