【作者】 刘志明； 陈志超； 李清军； 董斌； 付金宝； 匡海鹏；

【Author】 Liu Zhiming;Chen Zhichao;Li Qingjun;Dong Bin;Fu Jinbao;Kuang Haipeng;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences;

【机构】 中国科学院长春光学精密机械与物理研究所；

【摘要】 长焦距航空遥感器对温度变化极为敏感,为了保证极端条件下航空遥感器内部的温度水平和均匀性,实现对地面景物信息的有效采集,对某型长焦距航空遥感器的热控系统进行了设计。首先,分析了温度变化及温度梯度对光学系统折射率、面型、焦平面位置及像差的影响。然后,阐述了传统的热控设计的局限性,并对设备进行了多框架复合热控设计。最后,通过计算给出了系统的热控性能指标,通过仿真分析和实验对三种设计方式进行了比较。实验结果表明:多框架复合热控设计可以将设备内部的温度稳定在19℃±1℃范围内,基本消除了光学系统的温度变化和温度梯度,与常温环境成像分辨率60 lp/mm对比,图像分辨率无下降解决了该设备在低温环境下无法成像的技术难题。更多还原

【Abstract】 Long focal aerial remote sensors are quite sensitive to temperature changes.In order to ensure the uniform temperature level inside the aerial remote sensors under the extreme weather conditions,and the effective implementation on the ground scene information acquisition,a thermal control system is designed for long focal aerial remote sensors.First of all,this paper analyses the influence of temperature changes and temperature gradient to refractive index of optical system,surface model,the focal plane position and aberration.Then,it expounds the limitations of traditional thermal control design,and put forward multilayer framework composite thermal control design to the equipment.Finally,it gives the thermal control performance indicators according to the calculation results,and compares three design methods by means of simulation analysis and experiments.Experimental results show that through the adoption of the multilayer framework composite thermal control design,the temperature inside the equipment can be stable within the scope of the19℃ ± 1℃ and basically eliminate the temperature change and temperature gradient of the optical system.Compared with 60 lp/mm imaging resolution with normal temperature environment,the multilayer framework composite thermal control design solve the technical problem that aerial remote sensors cant imaging in high low temperature environment and image resolution does not fall.更多还原