低热负载红外探测器渐变壁厚冷指结构设计  

Design of Cold Finger Structure with Gradient Wall Thickness for Low Heat Load Infrared Detectors

作　　者：岳晨 闫杰 王冠[1] 方志浩 YUE Chen;YAN Jie;WANG Guan;FANG Zhi-hao(North China Research Institute of Electro-Optics,Beijing 100015,China)

机构地区：[1]华北光电技术研究所,北京100015

出　　处：《红外》2025年第4期27-32,共6页Infrared

摘　　要：随着制冷型红外探测器研制水平的提高,对杜瓦结构提出了低漏热的需求。通过力学仿真与传导热负载理论分析,提出了一种低热负载红外探测器渐变壁厚冷指结构设计,并探究了渐变壁厚冷指的外径渐变位置对力学可靠性与传导漏热的影响。结果表明,若采用大量级振动条件,则渐变壁厚冷指的外径渐变位置可适当上移,以增强结构的稳定性;若采用小量级振动条件,则外径渐变位置可适当下移。在满足力学可靠性的前提下,进一步降低热负载,并进行了组件优化验证。该结构在保证力学可靠性的前提下,可将杜瓦静态热负载降低15%~18%。With the improvement of the development level of cooled infrared detectors,the demand for low heat leakage has been put forward for the dewar structure.Through mechanical simulation and theoretical analysis of conduction heat load,a design of cold finger structure with gradient wall thickness for low heat load infrared detectors is proposed,and the influence of the outer diameter gradient position of the cold finger with gradient wall thickness on mechanical reliability and conduction heat leakage is explored.The results show that if a large-scale vibration condition is adopted,the outer diameter gradient position of the cold finger with gradient wall thickness can be appropriately moved up to enhance the stability of the structure;if a small-scale vibration condition is adopted,the outer diameter gradient position can be appropriately moved down.Under the premise of meeting mechanical reliability,the heat load is further reduced,and the component optimization verification is carried out.Under the premise of ensuring mechanical reliability,this structure can reduce the static heat load of the dewar by 15%to 18%.

关 键 词：红外探测器 冷指 传导热负载 

分 类 号：TN2[电子电信—物理电子学]