5 September 2017 Optical design of the long slit spectrograph for 1m telescope
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In this article we describe optical design of a long-slit spectrograph for the 1-m telescopes of the Special Astrophysical Observatory of Russian Academy of Science and Bonhyunsan Optical Astronomical Observatory (Rep. of Korea). The operating spectral range is 350-750 nm. The spectrograph is to provide several observing modes including the following spectral resolutions: R100; R1000; R4000. It provides the direct imaging regime as well. The spectroscopic and imaging regimes are constrained with the use of a 2k × 4k CCD detector of 13.5 μm pixel size. For dispersing optical elements we use volume-phased grisms at each of the spectroscopic modes. The highest resolution mode (R4000) is provided by consecutive observations in three spectral ranges: 350-450 nm; 450-580 nm; 580-750 nm. Light losses in the spectrograph are achieved to be less than 50% in the whole spectral range due to the use of Ohara glasses. As to technical advantages of the presented solution we would notice its ability to provide all observing modes in a wide spectral range with one, non-replaceable projection camera without glued lenses. The spot diagram size does not exceed 2 pixels size in all modes and wavelengths.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dmitrii Sazonenko, Dmitrii Kukushkin, Alexey Bakholdin, "Optical design of the long slit spectrograph for 1m telescope", Proc. SPIE 10401, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems, 104011J (5 September 2017); doi: 10.1117/12.2275548; https://doi.org/10.1117/12.2275548


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