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MEGARA spectrograph optics

机译：MEGARA光谱仪光学

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MEGARA is the next optical Integral-Field Unit (IFU) and Multi-Object Spectrograph (MOS) for Gran TelescopioCanarias. The instrument offers two IFUs plus a Multi-Object Spectroscopy (MOS) mode: a large compact bundlecovering 12.5 arcsec x 11.3 arcsec on sky with 100 μm fiber-core; a small compact bundle, of 8.5 arcsec x 6.7 arcsecwith 70 μm fiber-core and a fiber MOS positioner that allows to place up to 100 mini-bundles, 7 fibers each, with 100μm fiber-core, within a 3.5 arcmin x 3.5 arcmin field of view, around the two IFUs. The fibers, organized in bundles,end in the pseudo-slit plate, which will be placed at the entrance focal plane of the MEGARA spectrograph. The largeIFU and MOS modes will provide intermediate to high spectral resolutions, R=6800-17000. The small IFU mode willprovide R=8000-20000. All these resolutions are possible thanks to a spectrograph design based in the used of volumephase holographic gratings in combination with prisms to keep fixed the collimator and camera angle. The MEGARAoptics is composed by a total of 53 large optical elements per spectrograph: the field lens, the collimator and the cameralenses plus the complete set of pupil elements including holograms, windows and prisms. INAOE, a partner of the GTCand a partner of MEGARA consortium, is responsible of the optics manufacturing and tests. INAOE will carry out thisproject working in an alliance with CIO. This paper summarizes the status of MEGARA spectrograph optics at thePreliminary Design Review, held on March 2012.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译：Megara是Gran Telescocanarias的下一个光学积分单元（IFU）和多物体光谱仪（MOS）。该仪器提供两个IFUS加上多对象光谱（MOS）模式：大型紧凑型Bundlecovering 12.5 Arcsec x 11.3在天空中，100＆mu; m纤维核心;一个小型紧凑型束，为8.5 arcsec x 6.7 arcsecwith 70＆mu; m纤维芯和纤维mos定位器，允许多达100个迷你束，每个纤维7个纤维，100毫米; m纤维芯，在3.5 arcmin内。 x 3.5 arcmin视野，两个ifus围绕。在束中组织的纤维，在伪狭缝板上终止，将放置在兆扎光谱仪的入口焦平面。大码和MOS模式将提供中间的高光谱分辨率，r = 6800-17000。小型IFU模式将r = 8000-20000。由于基于Volumehephase全息光栅的光谱仪设计，所有这些分辨率都是可能的，与棱镜相结合以保持固定准直器和相机角度。 Megaraoptics每光谱仪共组成53个大型光学元件：现场镜头，准直器和群野牛加上全套瞳孔元素，包括全息图，窗户和棱镜。 inaoe是Gtcand的合作伙伴，梅加拉财团的合作伙伴，负责光学制造和测试。 Inaoe将在与CIO联盟中进行工作。本文总结了2012年3月举行的梅加拉光谱仪光学仪的地位。©（2012）光学仪表工程师（SPIE）的版权协会。仅供个人使用的摘要下载。

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