空间探测相机光学系统的杂散光分析和优化设计  

Stray light analysis and optimization design for optical system of space detection camera

作　　者：舒政通 韩赠崇 吴羽婷 林志强 张昊 王敏 SHU Zhengtong;HAN Zengchong;WU Yuting;LIN Zhiqiang;ZHANG Hao;WANG Min(Fujian Provincial Key Laboratory of Photonics Technology,Key Laboratory of Optoelectronic Science and Technology for Medicine(Ministry of Education),College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou 350007,China)

机构地区：[1]福建师范大学光电与信息工程学院医学光电科学与技术教育部重点实验室、福建省光子技术重点实验室,福建福州350007

出　　处：《应用光学》2023年第5期982-991,共10页Journal of Applied Optics

基　　金：福建省科技重大专项专题项目(2021YZ040012);中央引导地方科技发展专项(2020L3008);福建省科技计划项目高校产学合作项目(2019H6013)。

摘　　要：由于空间光环境的复杂性,抑制杂散光对保证空间相机成像性能尤其重要,该文针对宽光谱波段成像的空间探测相机光学系统进行杂散光分析和抑制优化设计。通过SOLIDWORKS和TracePro的无损式数据交互建立光机模型,并从光机材料的表面特性、机械结构、镜片透过率等多角度优化杂散光模型,再利用朗伯体光源分别对正反向进行光线追迹,然后结合光机模型的半剖图对系统关键表面进行重点取样分析。分析结果表明:优化后的光机系统在离轴角10.3°~15.4°内,点源透过率值与优化前的系统相比下降了66%~99.4%,在离轴角大于14.2°时点源透过率值接近10^(−4)量级,在离轴角18.4°处杂散光的点源透过率约为10^(−4)量级。最后通过鬼像实验,进一步证明了优化后的光机系统设计方法具有良好的杂散光抑制效果。Because of the complexity of space light environment,suppressing stray light is particularly important to ensure the imaging performance of space cameras.The stray light analysis and suppression optimization design were carried out for the optical system of the space probe camera for wide-band imaging.The optomechanical model was established through the lossless data interaction between SOLIDWORKS and TracePro,and the stray light model was optimized from the surface characteristics,mechanical structure,lens transmittance and other aspects of the optomechanical material.Then,the forward and reverse directions were traced by the Lambert body light source,and the key surfaces of the system were sampled and analyzed in combination with the half-section diagram of the optomechanical model.The analysis results show that the point source transmittance of the optimized optomechanical system at the off-axis angle of 10.3°~15.4°decreases by 66%~99.4%compared with that of the original system.The point source transmittance at the offaxis angle of more than 14.2°is close to the order of 10^(-4),and the point source transmittance of stray light at the off-axis angle of 18.4°is about 10^(-4).The ghost image experiment further proves that the optimized design of optomechanical system has good stray light suppression effect.

关 键 词：空间探测相机 杂散光 仿真建模 光线追迹 点源透过率 鬼像 

分 类 号：TN202[电子电信—物理电子学] O439[机械工程—光学工程] V423.42[理学—光学]