摘要
太阳红外光谱中蕴含着丰富的物理信息,其中CO 4.6μm波段是具有代表性的分子谱带,其形成于温度极小区附近,对研究太阳物理具有极其重要的意义。为获得CO 4.6μm波段太阳单色像,本文建立了一套全反射太阳红外成像观测系统。该系统采用定天镜跟踪引光,通过成像反射镜将太阳成像于3~5μm波段红外相机的焦平面上,该相机采用的是国产HgCdTe焦平面阵列器件。同时,为提高信噪比,提出了一种有效计算平场提取观测目标的方法,并利用该方法获得了CO 4.6μm波段的太阳单色像。
The solar infrared spectral band contains many information about the solar physics.Among these molecular bands,the CO 4.6μm band is the most representative one,which forms around the lowest temperature zone.It’s of great significance to study solar physics.In order to get a monochromatic image of the solar CO 4.6μm band,a total reflected infrared imaging observing system is built here.In the observing system,a coelostat is applied to guide the solar light to an imaging mirror,which reflects the solar image to the focal plane of a 35μm infrared detector.The detector of the system is made of an indigenous HgCdTe infrared focus plane array.For improving the signal to noise ratio,a new flat field correction and observed object extraction method is put forward.Using this method,a solar monochromatic image of CO 4.6μm band is obtained.
作者
魏烨艳
白先勇
张志勇
宋谦
冯志伟
WEI Yeyan;BAI Xianyong;ZHANG Zhiyong;SONG Qian;FENG Zhiwei(University of Chinese Academy of Sciences,Beijing 100049,P.R.China;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,P.R.China;Key Laboratory of Optical Astronomy,Chinese Academy of Sciences,Beijing 100101,P.R.China;Key Laboratory of Solar Activity,Chinese Academy of Sciences,Beijing 100101,P.R.China)
出处
《影像科学与光化学》
CAS
2020年第3期424-429,共6页
Imaging Science and Photochemistry
基金
国家自然科学基金项目(11673038,11173036)资助。
