Silicon immersion grating spectrograph design for the NASA Infrared Telescope Facility

A. T. Tokunaga; T. Bond; D. T. Jaffe; M. J. Mumma; J. T. Rayner; E. V. Tollestrup; D. W. Warren

doi:10.1117/12.788253

9 July 2008 Silicon immersion grating spectrograph design for the NASA Infrared Telescope Facility

A. T. Tokunaga, T. Bond, D. T. Jaffe, M. J. Mumma, J. T. Rayner, E. V. Tollestrup, D. W. Warren

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 70146A (2008) https://doi.org/10.1117/12.788253
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

We present a conceptual design for an innovative infrared cross-dispersed spectrograph for the NASA Infrared Telescope Facility (IRTF) at Mauna Kea. This facility-class instrument will provide a resolving power of up to 80,000 at 1.2-2.5 μm and 67,000 at 3-5 μm with a minimum slit width of 0.25". The instrument employs a silicon immersion grating in order to reduce the size of the instrument. The design incorporates a 2048×2048 infrared array for the spectrograph and an infrared slit viewer. The optical design is optimized for the thermal infrared (2.8-5.5 μm).

Citation Download Citation

A. T. Tokunaga, T. Bond, D. T. Jaffe, M. J. Mumma, J. T. Rayner, E. V. Tollestrup, and D. W. Warren "Silicon immersion grating spectrograph design for the NASA Infrared Telescope Facility", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70146A (9 July 2008); https://doi.org/10.1117/12.788253

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