摘要
实验中4f光学系统的输入函数载体与滤波函数载体往往存在着一定的角位移,而这个角位移的存在影响了4f光学系统的精确滤波。将空间光调制器(SLM)作为4f光学系统的输入和滤波函数的载体,利用光栅衍射理论和傅里叶变换理论,提出了一种测量该角位移的方法。滤波函数旋转角位移值的大小可以补偿输入和滤波函数载体间存在的角位移。滤波实验证明了方法的有效性和必要性。
Usually there is an angular displacement between the input function carrier and the filter function carrier in the 4f optical system during experiments,and its existence can influence the accurate filtering of the 4f optical system.The spatial light modulator（SLM） is used as the carriers of the input function and filter function in the 4f optical system,while a method of measuring the angular displacement is proposed by using the grating diffraction theory and the Fourier transform theory.In order to compen...
出处
《光学技术》
CAS
CSCD
北大核心
2009年第4期551-554,共4页
Optical Technique
基金
中国博士后科学基金资助项目(20080430096)
