The assembly and alignment of the 4MOST wide field corrector
The assembly and alignment of the 4MOST wide field corrector
复制标题
4MOST宽视场校正器的组装和对准
DOI：
10.1117/12.2629247
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Cunningham M
中科院分区：
文献类型：
--
作者：
Cunningham M
4 米多目标光谱望远镜 (4MOST) 是智利 ESO 帕拉纳尔天文台 VISTA 望远镜的光纤馈电多目标光谱仪。 4MOST 项目的目标是为 4MOST 联盟和 ESO 社区的天文学家创建一个通用且高效的光谱调查设施。该仪器本身将在约 4.2 平方度的视场内记录 2436 个同步光谱，由光学宽场校正器 (WFC)、基于倾斜脊柱设计的光纤定位器系统以及三个提供高和低光谱色散的光谱仪组成。 WFC 由 6 个透镜组成，分为 4 个元件，其中 2 个是胶合双合透镜，充当大气色散校正器 (ADC)。第一个透镜元件的直径为 0.9m，而其他元件的直径为 0.65m。为了使仪器实现其科学目标，每个镜头都需要对齐至 ∼50μm——这是一个重大挑战。这是通过使用接触式计量方法并辅以笔形束激光探头来实现的。特别是，我们采用了一种新颖的离轴激光束系统来测试装运前后光学器件的对准情况。本文详细介绍了对准和组装方法，并介绍了 WFC 所实现的镜头定位和预计性能的最新结果
The 4-metre Multi-Object Spectroscopic Telescope (4MOST) is a fibre-fed multi-object spectrograph for the VISTA telescope at the ESO Paranal Observatory in Chile. The goal of the 4MOST project is to create a general-purpose and highly efficient spectroscopic survey facility for astronomers in the 4MOST consortium and the ESO community. The instrument itself will record 2436 simultaneous spectra over a ∼4.2 square degree field of view and consists of an optical Wide-Field Corrector (WFC), a fibre positioner system based on a tilting spine design, and three spectrographs giving both high and low spectral dispersion. The WFC comprises of 6 lenses grouped into 4 elements, 2 of which are cemented doublets that act as an atmospheric dispersion corrector (ADC). The first lens element is 0.9m in diameter whilst the diameter of the other elements is 0.65m. For the instrument to meet its science goals, each lens needs to be aligned to ∼50µm – a major challenge. This is achieved using contact metrology methods supplemented by pencil beam laser probes. In particular, a novel off-axis laser beam system has been implemented to test the optics’ alignment before and after shipment. This paper details the alignment and assembly methods and presents the latest results on the achieved lens positioning and projected performance of the WFC
4MOST 宽视场校正器：设计细节和 MAIV 流程
影响因子：
6.5
作者：
N. Azais;S. Barden;Greg A. Smith;Damien J. Jones;B. Delabre;Sylvain Egron
通讯作者：
Sylvain Egron
DECam 广角校正光学器件的组装、对准和测试
DOI：
10.1117/12.926590
发表时间：
2012
期刊：
--
影响因子：
--
作者：
Doel P
通讯作者：
Doel P