【作者】 赵慧洁； 程宣； 周鹏威；

【Author】 Zhao Huijie(Precision Opto-mechatronics Technology,Key Laboratory of Education Ministry,School of Instrument Science and Opto-electronics Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China)

【机构】 北京航空航天大学 仪器科学与光电工程学院,教育部精密光机电一体化技术实验室；

【摘要】 火星探测是深空探测的重要组成部分,成像光谱技术对火星探测,特别是火星表面矿物成分等的探测有着十分重要的意义。AOTF光谱探测技术具有凝视成像、光谱分辨率高、电调谐波段选择、结构简单及轻量化的特点,十分适合于深空探测应用。本文根据火星探测的应用需求和探测器平台的设计要求,设计出一种基于AOTF原理的成像光谱仪。该仪器由前置光机系统和后置电子学系统组成,波段范围是550~1000nm,光谱分辨率为0.7~3nm。文章首先介绍了系统结构,阐述了光学系统、光机结构以及电子学系统的设计,实现了仪器的光谱和辐射定标;再将该仪器搭载在模拟火星探测器上对人工目标进行成像试验,并利用SpaceWire新型总线技术实现数据传输;最后对探测器实时下传数据进行快速处理,得到了被测物的高光谱图像,并实现了仪器数据链路演示验证。该原理样机的研制为AOTF成像光谱技术在火星遥感探测领域的应用奠定了技术基础。更多还原

【Abstract】 Mars-based exploration is an important part of deep-space exploration.It is significative to detect the mineral in the surface of Mars using imaging spectrometry.Imaging spectrometry based on acousto-optic tunable filter(AOTF) has the characteristics of staring imaging,high-spectral resolution,electronic tunable spectral selection,simple structure and lightweight,therefore,it adapts to deep space exploration.In this paper,depending on the requirements of exploration applications,a novel imaging spectrometer based on AOTF has been designed,which is composed by optomechanical subsystem and electronic subsystem.The spectral range is between 550nm and 1000nm,while the spectral resolution is 0.7~3nm.First,the system structure is introduced.Then designs of optical system,optomechanical structure and electronic system are expatiated.After describing spectral and radiometric calibration,the imaging spectrometer is installed in the stimulant mars explorer,and a hyperspectral imaging experiment is carried out with iron ore as the target.Data transmission is implemented employing a novel bus technology of SpaceWire.Last,real-time image data coming from the explorer is fast processed and the hyperspectral image data cube is constructed,likewise,data link of the instrument is validated.The development of the prototype provides technical foundations for applications of AOTF imaging spectral technique in mars-based remote sensing in future.更多还原