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首页> 外文会议>Current developments in lens design and optical engineering XII; and Advances in thin film coatings VII >Cryogenic Lens Design Case Study: Gemini Planet Imager Spectrograph
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Cryogenic Lens Design Case Study: Gemini Planet Imager Spectrograph

机译：低温透镜设计案例研究：双子座行星成像仪光谱仪

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Making a lens design working at cryogenic temperature is a real challenge. Both optical and mechanical designer must work together to prevent problems during operation. The Gemini Planet Imager (GPI), currently under construction will be a facility instrument for the 8-m Gemini South telescope. The science instrument is a cryogenic integral field spectrograph based on a lenslet array. The integral field nature of the instrument allows for a full mapping of the focal plane at coarse spectral resolution. With such a data cube, artifacts within the PSF such as residual speckles can be suppressed. Additionally, the initial detection of any candidate planet will include spectral information that can be used to distinguish it from a background object: candidates can be followed up with detailed spectroscopic observations. The optics between the lenslet array and the detector are essentially a standard spectrograph with a collimating set of lenses, a dispersive prism and a camera set of lenses in a folded assembly. This paper describes the process from the first preliminary design to the final cryogenic system for both optical and mechanical design to achieve cryogenic working solution. We also discussed the assembly procedure (room temperature vs cryogenic compensation), the test support equipments and finally the laboratory optical performances over the field of view.
机译：使透镜设计在低温下工作是一个真正的挑战。光学和机械设计人员都必须共同努力，以防止在操作过程中出现问题。目前正在建造中的双子座行星成像仪（GPI）将成为8米双子座南望远镜的设施仪器。科学仪器是基于微透镜阵列的低温积分场光谱仪。仪器的积分场性质允许以粗糙的光谱分辨率对焦平面进行完整映射。利用这样的数据立方体，可以抑制PSF内的伪像，例如残留斑点。此外，任何候选行星的初始检测都将包含光谱信息，该光谱信息可用于将其与背景物体区分开：候选者可以进行详细的光谱观察。小透镜阵列和检测器之间的光学器件本质上是标准的光谱仪，其具有准直透镜组，色散棱镜和摄像机透镜组（折叠组件）。本文描述了从最初的初步设计到最终的低温系统的过程，包括光学和机械设计，以实现低温工作解决方案。我们还讨论了组装程序（室温vs低温补偿），测试支持设备以及最终在视野范围内的实验室光学性能。

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