摘要
近年来,红外天文学发展迅速,已成为天文学的重要分支,地面观测是天文观测的主要手段之一,受地球大气吸收影响,近红外波段只有J、H、K窗口适用于观测。碲镉汞光电探测器(mercury cadmium telluride,MCT)作为目前性能优越的红外探测器需要在80K的温度下工作,需要制冷机对其进行制冷,一般采用脉管制冷机等机械制冷方式,这类制冷机的特点是会带来振动,对图像清晰度产生影响,不利于天文科学分析,因此本文对采用脉管制冷机深度制冷的K波段MCT相机振动测量开展研究,提出了一种基于核密度估计的星点成像法,并结合三轴加速度计对焦平面的微小振动进行精确测量。实验结果表明,该方法能够有效测得微小振动信息,为图像后处理中的去模糊及成像质量优化提供了可靠的数据支持。
In recent years,infrared astronomy has developed rapidly,becoming an important branch of modern astronomy.Ground-based observation remains one of the primary methods of astronomical observation.However,due to atmospheric absorption,only J,H,and K windows in the near-infrared spectrum are suitable for observations.Mercury Cadmium Telluride(MCT)detectors,which are currently among the most advanced infrared detectors,require an operational temperature of 80 K,achievable through cooling by mechanical cryocoolers such as pulse tube cryocoolers.A notable drawback of these cryocoolers is their induced vibration,which negatively affects image clarity and complicates scientific analysis.Consequently,this study focused on measuring the vibration of a deep-cooled K-band MCT camera that utilized a pulse tube cryocooler.A star-point imaging method based on kernel density estimation was proposed,and,in combination with a three-axis accelerometer,enabled precise measurement of slight vibrations at the focal plane.Experimental results demonstrated that this method effectively captured subtle vibration information,thereby providing reliable data support for deblurring and imaging quality optimization in post-processing.
作者
魏江沅
曲文庆
王坚
马浩然
宁宇
张鸿飞
WEI Jiangyuan;QU Wenqing;WANG Jian;MA Haoran;NING Yu;ZHANG Hongfei(State Key Laboratory of Particle Detection and Electronics/Deep Space Exploration Laboratory,Department of Modern Physics,University of Science and Technology of China,Hefei,230026,China)
出处
《核电子学与探测技术》
北大核心
2025年第8期1146-1154,共9页
Nuclear Electronics & Detection Technology
基金
中央高校基本科研业务费(WK3440000006,WK2360000003,WK2030040064,YD2030000601,YD2030000602和YD2030000604)
国家自然科学基金(11603023和11773026)
中国科学院先导(XDC07020200和XDA15020605)
核探测与核电子学国家重点实验室自主课题基金(SKLPDE-ZZ-202325,SKLPDE-ZZ-202201和SKLPDE-KF-202314)
深空探测实验室前沿科研计划项目资助(2022-QYKYJH-HXYF-012)
唐仲英基金。
