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9 August 2016 Achieving the resolution of the spectrograph of the 6m large Azimuthal telescope
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Special Astrophysical Observatory of Russian Academy of Sciences (SAO RAS) creates a spectrograph with high spectral resolution for the 6-meter telescope. The spectrograph consists of a mobile unit located at the focus of the telescope’s main mirror, a stationary part located under the telescope and optical fibers which transmit light from the mobile part to the stationary one. The spectral resolution of the stationary part should be R=100000. To achieve such a value, the scheme has two spectral elements, with cross-dispersion. The main spectral element is an echelle grating. The second spectral element is a prism with a diffraction grating on one facet.
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Dmitrii Sazonenko, Dmitrii Kukushkin, Alexey Bakholdin, and Gennady Valyavin "Achieving the resolution of the spectrograph of the 6m large Azimuthal telescope", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99086E (9 August 2016);

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