论文标题
近红外成像器光谱仪和偏光仪的机械方面
Mechanical aspects of Near-Infrared Imager Spectrometer and Polarimeter
论文作者
论文摘要
近红外成像仪光谱仪和偏光仪（NISP）是摄像头，中间分辨率光谱仪以及印度阿布山的250万个物理研究实验室望远镜开发的成像偏光仪。 NISP旨在使用H2RG检测器在近IIR（0.8-2.5微米）中起作用。准直仪和摄像机镜头将图像从望远镜的焦平面传递到检测器平面。整个光学元件，机械支撑结构，探测器 - 辅助组件将使用真空露水内的开放循环液体氮气冷却至冷冻温度。 GFRP支持结构将用于将低温系统与露水分离。两层热屏蔽将用于减少辐射传热。分子筛（Getter）将用于增强Dewar内部的真空水平。磁铁再动开关组合用于滤光轮的绝对定位。在这里，我们详细描述了机械方面。
Near-infrared Imager Spectrometer and Polarimeter (NISP) is a camera, an intermediate resolution spectrograph and an imaging polarimeter being developed for upcoming 2.5m telescope of Physical Research Laboratory at Mount Abu, India. NISP is designed to work in the Near-IR (0.8-2.5 micron) using a H2RG detector. Collimator and camera lenses would transfer the image from the focal plane of the telescope to the detector plane. The entire optics, mechanical support structures, detector-SIDECAR assembly will be cooled to cryo-temperatures using an open cycle Liquid Nitrogen tank inside a vacuum Dewar. GFRP support structures would be used to isolate cryogenic system from the Dewar. Two layer thermal shielding would be used to reduce the radiative heat transfer. Molecular sieve (getter) would be used to enhance the vacuum level inside Dewar. Magnet-reedswitch combination are used for absolute positioning of filterwheels. Here we describe the mechanical aspects in detail.
