利用分数与常规傅里叶变换测量物体横向位移和倾斜因子  

Measuring transverse displacement and obliquity of object by use of FRT and FT

作　　者：尹宝银[1] 戴海涛[1] 张红军[1] 甄艳坤[1] 王应宗[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2003年第4期54-56,共3页Journal of Shaanxi Normal University：Natural Science Edition

摘　　要：根据分数傅里叶变换的基本性质,结合常规傅里叶变换的特点,提出了一种可以同时测量物体横向位移和倾斜因子的新方法,即采用二次曝光技术,同时记录物体变化前后的分数傅里叶强度,从而得到物体横向位移及倾斜信息.并在此基础上,给出了测定物体横向位移和倾斜因子的实验方案.By utilizing properties of the fractional Fourier transform (FRT) and normal Fourier transform, a new method is proposed which can acquire both the transverse displacement and tilting factor information in one time. It means that the intensities of fractional Fourier transform before changing and after changing are recorded at the same time by adopting twoexposure technology in order to get transverse displacement and tilting factor information. Moreover, the experiment plan is also designed. 

关 键 词：分数傅里叶变换 光学信息处理 常规傅里叶变换 横向位移 倾斜因子 测量 

分 类 号：O438.2[机械工程—光学工程]