Abstract—We report the results of laboratory tests of the first version of the high-resolution fiber-fed spectrograph designed for the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS). During laboratory tests a spectral resolution of about 70 000 was achieved. The peak efficiency of the entire optical path of the spectrograph (without light losses at the CCD, primary mirror of the 6-m telescope, and in the atmosphere) at 620 nm and with the equivalent slit widths of the 1″.5 and 0″.75 are equal to 8% and 4%, respectively. The resolving power R = 70 000 and 100 000 can be reached with the sky aperture 0″.75 and 0″.4 respectively. In the current version of the spectrograph these regimes of operation are implemented by mechanic aperturing of the slit. A dedicated projecting camera has been developed and is currently manufactured to operate with a collimated 200-mm diameter beam, which will make it possible to increase the spectral resolution up to 100 000. A two-beam image slicer will be used to maintain the luminous efficiency of the instrument at least at the 6% level.

中文翻译：

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俄罗斯科学院特殊天文台6米望远镜的高分辨率光纤馈电光谱仪：效率评估

摘要—我们报告了为俄罗斯科学院特殊天体观测台（SAO RAS）设计的第一版高分辨率光纤馈电光谱仪的实验室测试结果。在实验室测试中，光谱分辨率达到了约7万。光谱仪整个光路的峰值效率（在CCD，6米望远镜的主镜和大气中没有光损耗）在620 nm处，等效狭缝宽度为1“ .5和0 ” .75分别等于8％和4％。分辨力R分别通过天空孔径0“ .75和0” .4可以达到= 70000和100000。在当前版本的光谱仪中，这些操作方式是通过对狭缝进行机械开孔来实现的。已经开发了专用的投影相机，目前已制造该相机，以与直径200毫米的准直光束一起使用，这将使光谱分辨率提高到100000成为可能。两束图像切片器将用于保持发光仪器的效率至少达到6％的水平。