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MEGARA focal plane subsystems

机译:MEGARA焦平面子系统

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MEGARA (Multi-Espectrógrafo en GTC de Alta Resolución para Astronomía) is the future optical Integral-Field Unit(IFU) and Multi-Object Spectrograph (MOS) for GTC. The Fiber Units are placed at one Folded Cassegrain focus andfeed the spectrograph located on a Nasmyth-type platform.This paper summarizes the status of the design of the MEGARA Folded Cassegrain Subsystems after the PDR (held onMarch 2012), as well as the prototyping that has been carried out during this phase.The MEGARA Fiber Unit has two IFUs: a Large Compact Bundle covering 12.5 arcsec x 11.3 arcsec on sky (100microns fiber-core), and a Small Compact Bundle, of 8.5 arcsec x 6.7 arcsec (70 microns fiber-core), plus a Fiber MOSpositioner, able to place up to 100 mini-bundles 7 fibers each (100 microns fiber-core) in MOS configuration within a3.5arcmin x 3.5arcmin FOV. A field lens provides a telecentric focal plane where the fibers are located. Microlens arrayscouple the telescope beam to the collimator focal ratio at the entrance of the fibers (providing the f/17 to f/3 focal ratioreduction to enter into the fibers). Finally, the fibers, organized in bundles, end in the pseudo-slit plate, which will beplaced at the entrance focal plane of the MEGARA spectrographs.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译:MEGARA(多光谱GTC de AltaResoluciónparaAstronomía)是GTC的未来光学积分场单元(IFU)和多目标光谱仪(MOS)。光纤单元被放置在一个折叠的卡塞格伦焦点上并馈入位于纳斯米斯型平台上的光谱仪。本文总结了PDR(2012年3月举行)之后的MEGARA折叠式卡塞格琳子系统的设计现状以及其原型设计。 MEGARA光纤单元有两个IFU:一个在天空上覆盖12.5 arcsec x 11.3 arcsec的大型紧凑型光纤束(100微米光纤芯),一个在8.5 arcsec x 6.7 arcsec(70微米)的小型紧凑型光纤束光纤纤芯)和一个光纤MOS定位器,能够以3.5arcmin x 3.5arcmin FOV在MOS配置中最多放置100束微束的7根光纤(100微米纤芯)。物镜提供了光纤所在的远心焦平面。微透镜阵列将望远镜光束与光纤入口处的准直仪焦比耦合(以减小f / 17至f / 3焦比进入光纤的方式)。最后,成束组织的光纤终止于伪缝板中,该伪缝板将放置在MEGARA光谱仪的入射焦平面上。©(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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