降水粒子谱仪的光学系统设计及实现  

Design and realization of the optical system in a precipitation particle spectrometer

作　　者：周哲海[1] 陈家田[2] 黄敏松[2] 雷恒池[2] 祝连庆[1] 

机构地区：[1]北京信息科技大学光电测试技术北京市重点实验室,北京100192 [2]中国科学院云降水物理与强风暴重点实验室,北京100029

出　　处：《激光与红外》2016年第4期486-491,共6页Laser & Infrared

基　　金：国家自然科学基金项目(No.61475021;No.61108047);科技部行业专项(气象)基金项目(No.GYHY200806015);国家重大科研仪器设备研制专项(No.41327803)资助

摘　　要：重点讨论了降水粒子谱仪的光学系统的设计方法和实验结果。整个光学系统分为光束整形模块和粒子成像模块,分别介绍了两模块的设计原理和设计结果,以及实验测试结果。激光二极管发出的光束整形为40 mm×3.9 mm、长宽比接近10∶1的长条形光斑,作为粒子照明光束;测量了不同尺度圆形不透明图案的成像,以及轴上及轴外的成像,实现了1/5放大倍数的粒子成像。测量结果与设计结果非常吻合,达到了设计目标,满足了系统测量的功能要求。研究成果为粒子谱仪的技术改进和产品化提供了技术支持。Design methods and experimental measurement results of optical system in a precipitation particle spectrom- eter are presented. The optical system is composed of beam shaping subsystem and particle imaging subsystem. The design principles and structure parameters of two subsystems are demonstrated, and the measurement results are fur- ther shown. The beam emitted from laser diode is shaped into a rectangular spot with 40 mm x 3.9 mm, the ratio of length to width 10 ： 1, and the intensity is homogeneous. The imaging for circular opaque patterns with different diame- ters,on axis and off axis is measured respectively,and the imaging amplification of particles is 1/5. The measurement results agree with the design aims well, which meet the performance requirements of the precipitation particle spec- trometer. This provides technical support for further improvements and commoditization of the spectrometer.

关 键 词：光学测量 降水粒子谱仪 光束整形 光学成像 

分 类 号：TH765[机械工程—仪器科学与技术]