Opto-mechanical-thermal integration analysis of Doppler asymmetric spatial heterodyne interferometer  

多普勒外差干涉仪的光机热集成分析

作　　者：WANG Jin-jiang JIANG Lun TONG Shou-feng PEI Hui-yi CUI Yong GUO Ming-hang 王锦疆;江伦;佟首峰;裴惠熠;崔勇;郭名航(长春理工大学光电工程学院,吉林长春130022;鹏城实验室,广东深圳518000;长春理工大学航空与地面激光通信技术国防基础科学重点实验室,吉林长春130022;长春理工大学机电工程学院,吉林长春130022)

机构地区：[1]School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China [2]Peng Cheng Laboratory,Shenzhen 518000,China [3]Key Laboratory of Fundamental Science for National Defense of Aero and Ground Laser Communication Technology,Changchun University of Science and Technology,Changchun 130022,China [4]School of Mechatronics Engineering,Changchun University of Science and Technology,Changchun 130022,China

出　　处：《中国光学（中英文）》2024年第6期1489-1511,共23页Chinese Optics

基　　金：国家重点研发计划项目(No.2022YFB3902500);吉林省重点研发计划项目(No.20230201006GX)。

摘　　要：In order to improve the detection accuracy of Doppler asymmetric spatial heterodyne(DASH)interferometer in harsh temperatures,an opto-mechanical-thermal integration analysis is carried out.Firstly,the correlation between the interference phase and temperature is established according to the working principle and the phase algorithm of the interferometer.Secondly,the optical mechanical thermal analysis model and thermal deformation data acquisition model are designed.The deformation data of the interference module and the imaging optical system at different temperatures are given by temperature load simulation analysis,and the phase error caused by thermal deformation is obtained by fitting.Finally,based on the wind speed error caused by thermal deformation of each component,a reasonable temperature control scheme is proposed.The results show that the interference module occupies the main cause,the temperature must be controlled within(20±0.05)℃,and the temperature control should be carried out for the temperature sensitive parts,and the wind speed error caused by the part is 3.8 m/s.The thermal drift between the magnification of the imaging optical system and the thermal drift of the relative position between the imaging optical system and the detector should occupy the secondary cause,which should be controlled within(20±2)℃,and the wind speed error caused by the part is 3.05 m/s.In summary,the wind measurement error caused by interference module,imaging optical system,and the relative position between the imaging optical system and the detector can be controlled within 6.85 m/s.The analysis and temperature control schemes presented in this paper can provide theoretical basis for DASH interferometer engineering applications.为提高地基多普勒非对称空间外差(DASH)干涉仪在恶劣温度下的探测精度,对系统进行了光机热集成分析。首先,依据干涉仪的工作原理和相位算法建立了相位与温度的关联依据。接着,设计了光机热分析模型和热变形数据获取模型,采用温度负载仿真分析给出了干涉模块和成像光学系统在不同温度下的变形数据,拟合得到热变形所导致的相位误差。最后,基于各部件热变形造成的风速误差,给出合理的温控方案。结果表明,干涉模块占据主因,必须确保温度控制在(20±0.05)℃内,并针对温度敏感部件进行温度控制,此时,该部件造成的风速误差为3.8m/s。成像光学系统放大倍数的热漂移、成像光学系统和探测器相对位置的热漂移占据次因,应将其控制在(20±2)℃以内,此时该部件造成的风速误差为3.05 m/s。通过以上措施可以将干涉模块、成像光学系统、成像光学系统与探测器的相对位置三者共同造成的风速测量误差控制在6.85m/s内。本文的分析方案和温控措施可以为DASH干涉仪工程应用提供理论依据。

关 键 词：Doppler asymmetric spatial heterodyne interferometer interference module imaging optical system opto-mechanical thermal integration analysis phase error temperature control 

分 类 号：TH.744[机械工程]