摘要
随着气体炮中弹丸加载速率及其测试精度的不断提高,对激光测试系统的光幕光能分布均匀性和平行性的要求越来越高。采用衍射光学元件(DOE)将激光束整形为线状均匀光束,利用菲涅尔透镜形成均匀平行光幕,经过1/3分光镜、半透半反镜和全反射镜,实现高度平行的一体化单光源三光幕。利用改进GS(Gale-Shapley)算法设计DOE元件得到线状分布光束,实验测试其均匀度为83.7%;对三光幕的平行性进行测试,得到最大偏差为0.279 mrad。该单光源三光幕系统可满足超高速气炮弹测速时对光幕灵敏度及测速精度的需求。
With the continuous improvement of the loading rate of projectiles in gas guns and their testing accuracy,the requirements for the uniformity and parallelism of the light energy distribution of the light curtain of the laser test system are getting higher and higher.A diffractive optical element(DOE)is used to shape the laser beam into a linear uniform beam,and a Fresnel lens is utilized to form a uniform parallel light curtain,which passes through a 1/3 beam splitter,a half-transparent half-reflector and a total-reflector mirror to realize a highly parallel integrated single-light-source three-light curtain.Using the improved GS algorithm to design the DOE element to obtain a linear distribution of the beam,the uniformity of the experimental test is 83.7%;the parallelism of the three-light curtain is tested,and the maximum deviation is 0.279 mrad.This single-light-source three-light curtain system can meet the needs of ultra-high-speed gas shell speed measurement on the sensitivity of the light curtains and the demand for speed accuracy.
作者
雷芙溶
武志超
LEI Furong;WU Zhichao(School of Opto-electronical Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《测试技术学报》
2024年第5期520-526,共7页
Journal of Test and Measurement Technology
基金
陕西省教育厅重点实验室资助项目(20JS057)。
