基于二次付里叶变换的CCD精密定焦  

CCD and Its Locating Focal Length Based on Fourier Transform System

作　　者：李建新[1] 廖兆曙[2] 

机构地区：[1]武汉工交职业学院,武汉430074 [2]华中科技大学,武汉430074

出　　处：《湖北教育学院学报》2006年第8期61-62,72,共3页Journal of Hubei Institute of Education

摘　　要：CCD和其透镜作为逆付里叶变换系统,输入面为两个狭缝,改变正、负付里叶变换透镜的距离,自动比较CCD上两个波峰的间隔变化来控制CCD移动定焦。用付里叶变换原理和几何光学成像原理进行理论分析,并进行了实验研究和误差分析,这种方法有较高的定位精度。The spectrum plane is tow slits while CCD and its lens acting converse Fourier Transform System. When changing the space of lens which are positive and negative Fourier Transform , CCD moving locating focus is controlled by automatic comparing interval change of tow crests on CCD. In this paper, theoretical analysis is proceed with principle of Fourier Transform and imagine theory in geometrical optics, and experiment is carried out and range of error is analyzed. This method has higher locating accuracy.

关 键 词：付里叶变换 衍射 CCD 精密定焦 透镜 误差分析 几何光学 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O435[自动化与计算机技术—计算机科学与技术]