激光变倍准直扩束系统设计  

Design of Collimating and Beam Expanding Laser System

作　　者：王培芳[1] 向阳[1] 高健[1] 王继凯[1] 

机构地区：[1]长春理工大学光电工程学院,吉林长春130022

出　　处：《光学学报》2015年第9期274-279,共6页Acta Optica Sinica

摘　　要：激光准直扩束系统可应用在激光测距，激光切割，空间光学激光干涉仪等各个领域。其主要作用是通过改善激光束的空间发散角，提高光束的准直性，使激光束达到对孔径的要求。基于无焦变倍原理运用Zemax软件模拟设计了一激光准直扩束系统，入射激光波长为1064nm，发散角小于5mrad，入射直径为1mm，准直扩束系统的扩束比4～24倍连续可调，可实现压缩光束的发散角（出射光发散角可压缩至0．208mrad），扩大光斑尺寸，达到对激光准直和扩束的目的。不同倍率下波像差最大均方根（RMS）值为0．1769λ，均小于λ／4，满足像质评价要求。此设计结构简单，易于加工装调，具有较高的实际应用价值。Collimating and beam expanding laser system can be used in laser distance, laser cutting, space optics, laser interferometer and other fields. The main function of this system is aimed to reach the reqiurements of the system apreture though reducing the spatial divergence angles of the laser beam and then improving the beam collimation. Based on the priniple of non-focus zoom and with the help of analog of Zemax software, a collimating and beam expanding system is introduced： the wavelength of incident laser is 1064 nm; the value of divergence angle is less than 5 mrad; the diameter of incidence is 1 mm; the ratio of beam expanding is continually 4-24, which can help to reduce the beam divergence angle （the minimum angle is 0.208 mrad） and expand the spot size. With different ratios of the system, the root mean square （RMS） value of maximum wave aberration is 0.1769 λ （less than λ/4）, which meets the requrements for image quality evaluation. The advantages of this system are simple, easily installed and ajusted, and also widely used in different projects.

关 键 词：光学设计 准直扩束 无焦变倍 ZEMAX 激光 

分 类 号：O439[机械工程—光学工程]