Trade-offs in the visible spectrograph of the ELT instrument MOSAIC

Trade-offs in the visible spectrograph of the ELT instrument MOSAIC
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ELT 仪器 MOSAIC 可见光光谱仪的权衡

DOI:
10.1117/12.2313302
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发表时间:
2018
期刊:
--
影响因子:
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通讯作者:
Dalton G
Dalton G
中科院分区:
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作者:
Dalton G

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MOSAIC是一个用于极大望远镜(ELT)的多目标摄谱仪的概念。计划用5台可见光谱仪和5台近红外光谱仪覆盖460 nm至1800 nm的波长范围。ELT在可见波长范围内远离衍射极限。而不是开发一个大型和复杂的AO系统,它决定该仪器将看到有限的可见光。因此,ELT焦平面中的光斑尺寸直径约为2.8 mm,并且需要由具有大芯直径的多个光纤采样。因此,需要大的光学系统来实现光谱分辨率、带宽和多路复用的科学要求。我们与制造商密切合作,设计出可行且符合科学要求的仪器。
MOSAIC is a concept for a multi-object spectrograph for the Extremely Large Telescope (ELT). It is planned to cover the wavelength range from 460 nm to 1800 nm with 5 visible spectrographs and 5 near-infrared spectrographs. The ELT is far from diffraction limited in the visible wavelength range. Rather than developing a large and complex AO system, it was decided that the instrument will be seeing limited in the visible. Spot sizes are therefore about 2.8 mm in diameter in the ELT focal plane, and need to be sampled by multiple fibers with large core diameter. As a result, large optics is required to achieve the science requirements on spectral resolution, bandwidth and multiplex. We work in close collaboration with manufacturers to design an instrument that is feasible and meets the scientific requirements.
DOI: --
发表时间: 2014
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影响因子: --
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