星载遥感相机焦面窗口玻璃辐射热差消除设计  

Design for eliminating radiant heat difference of focal surface window in spaceborne remote sensing camera

作　　者：李永昆 高长春[1] 焦建超[1] 吴立民[1] 于振涛[2] Li Yongkun;Gao Changchun;Jiao Jianchao;Wu Limin;Yu Zhentao(Beijing Institute of Mechanics&Electricity,Beijing 100094,China;Navy Submarine Acadmy,Qingdao 266000,China)

机构地区：[1]北京空间机电研究所,北京100094 [2]海军潜艇学院,山东青岛266000

出　　处：《红外与激光工程》2023年第11期320-326,共7页Infrared and Laser Engineering

摘　　要：应某星载高精密遥感相机的功能指标要求,镜头及焦面探测器工作在不同温度,且存在较大温差,以致焦面探测器窗口玻璃的冷辐射使镜头最后一片透镜的温度梯度、面型参数等发生较大变化,不能满足光学系统成像质量的要求。为消除焦面探测器窗口玻璃的冷辐射对光学系统的影响,提出了一种于焦面探测器窗口玻璃与镜头间增加一层阻隔光窗的设计,用于将焦面窗口玻璃的冷辐射进行阻隔屏蔽,从而使光学系统的成像质量达到要求。经过建模仿真对比,证明文中的设计形式能够消除焦面组件与镜头组件间的辐射热差,提升了相机的成像质量,验证了该设计的正确性与合理性,为星载高精密相机消除部组件间的辐射热差设计起到了一定的指导作用。In accordance with the requirements of a satellite-borne remote sensing camera,the lens and focal detector work at different temperatures,which results in a large temperature difference between them.The cold radiation of the focal detector window makes the surface parameters and temperature gradient of the lens change greatly,which cannot meet the imaging requirements.In order to eliminate the influence of radiant heat difference,this paper proposes a design of adding a light blocking window between the detector window glass and the lens,which is used to elininate the cold radiation of the focal window glass so that the imaging quality of the lens system can meet the requirements.Through comparative simulation,it is proved that the design form of this paper can eliminate the influence of the radiant heat of the focal plane,which verifies the rationality and correctness of this design and provides a certain design guidance for the design of high-precision lens to eliminate the radiant heat difference.Objective Temperature is an important parameter that affects the performance of the lens system of highprecision satellite-borne remote sensing camera.Temperature change produces temperature gradient,which results in thermal stress and thermal deformation.And the mirror element curvature radius,center thickness,air interval,refractive index change greatly,especially on the edge area of optical element.Even edge collapse and warping phenomenon appeared,resulting in mirror element tilt,imaging plane drift and other problems,which affects the imaging quality of camera.So athermalization design and temperature control must be adopted for remote sensing camera.Many athermalization designs are based on the temperature gradient introduced by heat conduction to affect the mirror displacement of optical elements,but the effect of temperature gradient introduced by radiant heat difference is less studied.Therefore,based on the surface parameter change of a satellite-borne remote sensing camera lens assembly caused by the cold r

关 键 词：高精密遥感相机 辐射热差 阻隔光窗 建模仿真 

分 类 号：V447.1[航空宇航科学与技术—飞行器设计]