8 July 2018 ELT-HIRES the high resolution instrument for the ELT: optical design and instrument architecture
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Abstract
The first generation of ELT instruments will include an optical-infrared High Resolution Spectrograph, conventionally indicated as ELT-HIRES. This paper describes the optical design and overall architecture of the instrument whose main capabilities can be summarized as follows. – Fibers fed specrographs with resolving power R=100,000 (HR-modes), R=150,000 (UHR-modes) and R=20,000 (MR-modes). – Simultaneous wavelength coverage from 400 nm to 1800 nm; extendable to 300-2400 nm. – Spectrometers with fixed configurations and without moving optical parts. – Maximum size of entrance apertures ideal for seeing limited observations. – Many observing modes, including seeing-limited single-object spectroscopy, multi-objects medium resolution spectroscopy and IFU observations with different spatial scales, down to the diffraction limit of the ELT telescope. – Observing modes defined and selected in interfaces outside of the spectrographs. – Modular design compatible with a minimal baseline that can be subsequently expanded and upgraded.
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E. Oliva, E. Oliva, A. Tozzi, A. Tozzi, D. Ferruzzi, D. Ferruzzi, M. Riva, M. Riva, M. Genoni, M. Genoni, A. Marconi, A. Marconi, R. Maiolino, R. Maiolino, L. Origlia, L. Origlia, "ELT-HIRES the high resolution instrument for the ELT: optical design and instrument architecture", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107028O (8 July 2018); doi: 10.1117/12.2309923; https://doi.org/10.1117/12.2309923
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