位相型自聚焦微分滤波器  

Phase Type Self Focusing Differential Filter

作　　者：纪宪明[1] 周进[1] 李桂祥 高文琦[1] 

机构地区：[1]南京大学物理系

出　　处：《光电工程》1996年第4期45-49,共5页Opto-Electronic Engineering

基　　金：江苏省自然科学基金

摘　　要：介绍一种用二元光学方法制作的光学图象微分滤波器，它是由两个频率相近的位相型Ｒｏｎｃｈｉ光栅和离轴型位相菲涅耳波带片的组合而成的。称之为位相型自聚焦滤波器。它具有衍射效率高，光路简单。A phase type optical image differential filter made by binary optical method is presented in the paper.It combines two phase type Ronchi gratings which have close frequency with off axis phase Fresnel zone plate and is called self focusing differential filter.Its advantages are high diffraction efficiency,simple optical path and convenient operation etc.

关 键 词：相位型光栅 微分滤波器 菲涅耳波带片 二元光学 

分 类 号：TN713[电子电信—电路与系统] TN25