结合直角反射镜的狭缝型空间滤波器  

Slit spatial filter with a right-angle mirror

作　　者：郑金湖 陈静 王彤 王华鑫 熊晗 ZHENG Jinhu;CHEN Jing;WANG Tong;WANG Huaxin;XIONG Han(College of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学物理科学与技术学院,江苏苏州215009

出　　处：《光学技术》2024年第5期544-549,共6页Optical Technique

基　　金：“十四五”江苏省重点学科资助项目(2021135)。

摘　　要：文章提出一种由一对柱透镜、一个滤波狭缝和直角反射镜组成的新型狭缝空间滤波器。柱透镜对和滤波狭缝用于组成一维滤波结构,直角反射镜用于将波面旋转90°并反射回一维滤波结构进行另一维的空间滤波,从而实现对光束的完全滤波。根据瑞利-索末菲衍射积分,利用Matlab软件对光束在新型狭缝滤波器中的传输进行了理论模拟。结合实验验证,证明了新型狭缝滤波结构的像传递和空间滤波功能。由于结构上近似于三镜型狭缝滤波器的对折结构,因此新型狭缝滤波器相比三镜型狭缝滤波器要缩短将近一半,可进一步降低大型激光装置的规模和成本。A new-type slit spatial filter is proposed,which consists of a pair of cylindrical lens,a filtering slit,and a right-angle mirror.A pair of cylindrical lens and a filtering slit are used to form a one-dimensional filter structure.The right-angle mirror is used to rotate the wavefront 90°and reflect it back to the one-dimensional filter structure for another dimension of spatial filtering,thereby achieving complete filtering of the beam.Based on the Rayleigh-Sommerfeld diffraction integral,the transmission of the beam in the new slit filter was theoretically simulated using Matlab software.Combined with experimental verification,proving the image relay and spatial filtering functions of the new slit filter structure.The new-type slit spatial filter is similar to the folded structure of the three-lens slit spatial filter,so it is nearly half shorter in length,which can further reduce the scale and cost of large laser devices.

关 键 词：激光光学 像传递 空间滤波 直角反射镜 

分 类 号：O436[机械工程—光学工程]