首页> 外文会议>Sensors, Systems, and Next-Generation Satellites XI; Proceedings of SPIE-The International Society for Optical Engineering; vol.6744 >MIMA, a miniaturized infrared spectrometer for Mars ground exploration: part Ⅱ, optical design
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MIMA, a miniaturized infrared spectrometer for Mars ground exploration: part Ⅱ, optical design

机译:MIMA,用于火星地面探测的微型红外光谱仪:第二部分,光学设计

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The Mars Infrared MApper (MIMA) is a FT-IR miniaturised spectrometer which is being developed for ESA ExoMars Pasteur mission. MIMA will be mounted on the rover mast and so it must be compact and light-weight. The scientific goals and its thermo-mechanical design are presented in two companion papers [1] and [2]. In this work the optical design will be reviewed and the results of the tests performed on some optical components will be presented. The design has faced challenging constraints mainly linked to the requirement of keeping the performances good enough to fulfil the scientific objectives of the mission, while, at the same time, it was imperative to keep the overall size and weigh within the allocated resources. In addition the instrument must be able to operate in the very harsh environment of the Martian surface and to withstand, without permanent damage, even harsher conditions as well as the severe dynamic loads expected at landing on Mars. The chosen solution is a single channel double pendulum interferometer, covering the spectral range between 2 and 25 micron, crucial for the scientific interpretation of the recorded spectra, with a resolution variable between 10 and 5 cm-1. Since the spectral range is too wide to be covered by a single detector, it has been decided to use two different detectors, mounted side by side, in a customised case. Such innovative solution has obviously pros and cons and the optical design has been driven by the need to reduce the inconveniences, while maintaining the advantages.
机译:火星红外MApper(MIMA)是一款FT-IR微型光谱仪,专为ESA ExoMars Pasteur任务而开发。 MIMA将安装在流动站桅杆上,因此它必须紧凑且重量轻。科学目标及其热机械设计在两篇随附的论文[1]和[2]中提出。在这项工作中,将对光学设计进行审查,并介绍在某些光学组件上执行的测试结果。设计面临挑战性限制,主要与保持性能足以满足任务的科学目标的要求有关,与此同时,必须保持整体规模并在分配的资源范围内权衡。此外,该仪器必须能够在火星表面非常恶劣的环境中运行,并且能够承受更严酷的条件以及预计在火星着陆时承受的巨大动态载荷而不会造成永久性损坏。选择的解决方案是单通道双摆干涉仪,其覆盖的光谱范围在2到25微米之间,这对于科学解释记录的光谱至关重要,其分辨率在10到5 cm-1之间。由于光谱范围太宽,无法由单个检测器覆盖,因此已决定在定制情况下使用两个并排安装的不同检测器。这种创新的解决方案显然具有优缺点,并且光学设计的驱动是在保持优势的同时减少不便。

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