A high-resolution optical spectrograph for the Thirty Meter Telescope: design and performance

Steve Osterman; Cynthia Froning; Matthew Beasley; James Green; Stephane Beland

doi:10.1117/12.672333

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30 June 2006 A high-resolution optical spectrograph for the Thirty Meter Telescope: design and performance

Steve Osterman, Cynthia Froning, Matthew Beasley, James Green, Stephane Beland

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Proceedings Volume 6269, Ground-based and Airborne Instrumentation for Astronomy; 626930 (2006) https://doi.org/10.1117/12.672333
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We have completed a conceptual design study of the High Resolution Optical Spectrograph for the Thirty Meter Telescope project. We propose the use of a fiber fed integral field unit and a dichroic tree to achieve R=100,000 spectroscopy from 310 to 1100 nm independent of AO performance. The system relies on the dichroic tree to provide coarse wavelength selection, and 32 first order spectro-graph benches. This approach allows for simultaneous optimization of grating and detector performance for all wavelengths, resulting in high efficiency, near uniform dispersion, and reduced program risk and cost due to the high degree of component commonality. We present projected performance and design details.

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Steve Osterman, Cynthia Froning, Matthew Beasley, James Green, and Stephane Beland "A high-resolution optical spectrograph for the Thirty Meter Telescope: design and performance", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 626930 (30 June 2006); https://doi.org/10.1117/12.672333

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