11 July 2008 A novel design of a fibre-fed high-resolution spectrograph for WFMOS
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We present a novel design of a fibre-fed high-resolution spectrograph (HRS hereafter) for WFMOS. WFMOS HRS is a multi-object spectrograph for studying the formation and evolution history of our Galaxy by measuring spectra of Galactic stars. In a 8m-class telescope, it aims to measure 1,500 stellar spectra simultaneously with spectral resolution between 25,000 and 40,000 in optical wavebands defined within 4000Å and 9000Å. For the HRS optical design, we have explored three disperser options: Volume Phase Holographic Grating (VPHGs), prism-immersed VPHG, and Echelle grating. Two camera designs have also been studied for the spectrograph camera optics, one tranmissive design and the other a Schmidt design. We also investigated a conjugate collimator design that allows two spectrographs to share a single grating so as to work as a single spectrograph.
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Hanshin Lee, Hanshin Lee, Gavin B. Dalton, Gavin B. Dalton, Ian A. J. Tosh, Ian A. J. Tosh, } "A novel design of a fibre-fed high-resolution spectrograph for WFMOS", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70144E (11 July 2008); doi: 10.1117/12.787982; https://doi.org/10.1117/12.787982

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