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Hermes: the engineering challenges

机译：爱马仕：工程挑战

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The Australian Astronomical Observatory is building a 4-channel VPH-grating High Efficiency and Resolution MultiElement Spectrograph (HERMES) for the 3.9 meter Anglo-Australian Telescope (AAT). HERMES will provide anominal spectral resolving power of 28,000 for Galactic Archaeology with an optional high-resolution mode of 45,000with the use of a slit mask.HERMES is fed by a fibre positioning robot called 2dF at the telescope prime focus. There are a total of 784 sciencefibres, which interface with the spectrograph via two separate slit body assemblies, each comprising of 392 sciencefibers. The slit defines the spectral lines of 392 fibres on the detector. The width of the detector determines the spectralbandwidth and the detector height determines the fibre to fibre spacing or cross talk. Tolerances that follow from this areall in the 10 micrometer range.The slit relay optics must contribute negligibly to the overall image quality budget and uniformly illuminate thespectrograph exit pupil. The latter requirement effectively requires that the relay optics provide a telecentric input at thecollimator entrance slit. As a result it is critical to align the optical components to extreme precision required by theoptical design.This paper discusses the engineering challenges of designing, optimising, tolerancing and manufacturing of very precisemechanical components for housing optics and the design of low cost of jigs and fixtures for alignment and assembly ofthe optics.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译：澳大利亚天文台正在为3.9米的英澳望远镜（AAT）建立4通道VPH光栅高效和高分辨率多元素光谱仪（HERMES）。 HERMES将为银河考古提供28,000的异常光谱分辨能力，并通过使用狭缝掩模提供可选的45,000高分辨率模式.HERMES由一个称为2dF的光纤定位机器人在望远镜的主要焦点上供电。共有784根科学纤维，它们通过两个独立的狭缝主体组件与光谱仪连接，每条狭缝体组件均包含392根科学纤维。狭缝定义了探测器上392根光纤的光谱线。检测器的宽度确定光谱带宽，检测器的高度确定光纤到光纤的间隔或串扰。由此产生的公差都在10微米范围内。狭缝中继光学器件对整体图像质量预算的贡献可忽略不计，并能均匀照亮光谱仪出射光瞳。后一个要求有效地要求中继光学器件在准直仪入口狭缝处提供远心输入。因此，至关重要的是使光学部件对准光学设计所需的极高精度。本文讨论了设计，优化，公差和制造用于壳体光学部件的非常精密的机械部件的工程挑战，以及低成本夹具和固定装置的设计。用于光学元件的对准和组装。©（2012）版权所有，美国光电仪器工程师协会（SPIE）。摘要的下载仅允许个人使用。

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