大口径热不敏星敏感器光机设计与分析  

Optomechanical Design and Analysis of Large Aperture Thermal Insensitive Star Sensor

作　　者：刘永清 高天元[1] 韩旭[1] LIU Yongqing;GAO Tianyuan;HAN Xu(College of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学光电工程学院,吉林长春130022

出　　处：《红外技术》2024年第1期31-35,共5页Infrared Technology

摘　　要：为满足大口径长焦距星敏感器的需求,对一种大口径热不敏星敏感器进行光机设计,根据指标要求,对热不敏系统进行光机热集成分析。使用MSC.Patran软件对主次镜结构施加温度载荷,计算出主次镜结构的热弹性变形,先利用MSC.Nastran软件计算热变形后节点的刚体位移,再利用Sigft光机接口软件分析得到变形后主次镜表面的Zernike多项式系数。将结果导入Zemax中,预判镜片面型变化以及刚体位移对弥散斑、光轴漂移量及波像差的影响。最后通过在20℃±5℃的温度范围内装调测试验证了系统性能满足指标要求以及光机热集成分析的准确性,提供了一套准确快捷的光机热集成分析流程。To meet the requirements of large-aperture and long-focal-length star sensors,an optomechanical design of a large-aperture thermally insensitive star sensor was created.According to the index requirements,an optomechanical thermal integration analysis of the thermally insensitive system was conducted.The MSC Patran software applied temperature loads to the primary and secondary mirror structures to calculate their thermoelastic deformations.The rigid body displacement of the node after thermal deformation was calculated using the Nastran software,and the Zernike polynomial coefficients of the primary and secondary mirror surfaces after deformation were analyzed using Sigft optical mechanical interface software.The results were imported to Zemax to predict the influence of lens shape change and rigid body displacement on speckle,optical axis drift,and wave aberration.The system performance meets the index requirements and the accuracy of the optical mechanical thermal integration analysis is verified through an installation and debugging test in the temperature range of 20℃±5℃,providing an accurate and fast optical mechanical thermal integration analysis process.

关 键 词：星敏感器 光机设计 弥散斑 光机热集成分析 

分 类 号：TH74[机械工程—光学工程]