两段式双五棱镜光束平移系统精度研究  

Accuracy of Beam Translation System Comprised of Two-Stage Double Pentaprism

作　　者：刘成功 母兴俊 林鹤 张磊 Liu Chenggong;Mu Xingjun;Lin He;Zhang Lei(Key Laboratory of Optoelectric Measurement and Optical Information Transmission Technology , Ministry of Education, School of Opto-Electronic Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, China)

机构地区：[1]长春理工大学光电工程学院光电测控与光信息传输技术教育部重点实验室

出　　处：《中国激光》2019年第7期151-157,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(11474037)

摘　　要：在光学扫描和光电检测系统中,为了实现远距离、大范围光束平移的目的,对由双五棱镜构成的光束平移系统进行精度分析,并利用自准直法对系统的平行性精度进行测试。其组件中两个五棱镜摆放位置相对于理论位置存在误差,导致系统中出射光与入射光不平行,利用自准直法对系统进行光学装调,以保证出射光与入射光的平行性。但该平移组件在工作时通过转动副绕入射光轴旋转,系统会相对于某一机械轴产生转动误差,导致双五棱镜系统坐标转换矩阵发生变化,出射光与入射光不再平行。通过分析五棱镜的方位误差和系统整体的转动误差与系统误差之间的非线性关系,建立数学模型,并利用仿真实验加以验证理论分析的正确性,最后提出减小系统误差的解决方案,将其组件平移精度控制到10″以内,为棱镜在光束折转时的误差分析提供借鉴。Long-distance and large-range beam translation is achieved in the optical scanning and photodetection systems by analyzing the accuracy of the beam translation system comprised of a double pentaprism and by obtaining the parallel accuracy of the system using the autocollimation method. The direction of the emergent light in the system is not parallel to that of the incident light because of the errors in the positions of two pentaprisms in an component relative to the theoretical position. The autocollimation method can be used to optically adjust the system to ensure that the direction of the emergent light is parallel to that of the incident light. The beam-translating component comprising a double pentaprism rotates around the incident optical axis by the rotating pair during operation;hence, the whole system will generate a rotational error around a certain mechanical axis, which will cause the coordinate transformation matrix of the double pentaprism system to no longer be the unit matrix and the direction of the emergent light to no longer be parallel to the direction of the incident light. Further, a mathematical model can be established by analyzing the azimuth error of the pentaprism and the nonlinear relation between the overall rotation error and the systematic error of the system. The ray-tracing simulation is used herein to verify the theoretical analysis accuracy. A solution is also proposed for reducing the systematic error, which controls the accuracy of the beam translation system comprising double pentaprisms to within 10″ and provides a good reference for the error analysis of the prism in case of the beam folding problem.

关 键 词：测量 光束平移 动态光学 误差分析 光学调整 

分 类 号：TN203[电子电信—物理电子学] V556.5[航空宇航科学与技术—人机与环境工程]