Design of an f/1 camera for the HET low-resolution spectrograph IR extension

Carlos Tejada; Gary J. Hill; Francisco J. Cobos

doi:10.1117/12.461961

7 March 2003 Design of an f/1 camera for the HET low-resolution spectrograph IR extension

Carlos Tejada, Gary J. Hill, Francisco J. Cobos

Proceedings Volume 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes; (2003) https://doi.org/10.1117/12.461961
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

We present the optical design of the f/1 camera for the Hobby-Eberly Telescope Low Resolution Spectrograph Infrared Extension (LRS-J). This instrument extends the coverage of the LRS to 1300 nm by adding a fast cryogenic camera and volume holographic grisms (VPHG) to the LRS. This approach enables new science without the expense of building a complete new instrument. The camera is a catadioptric Maksutov type design, based on that of the optical LRS, that uses a HAWAII-1 1024x1024 detector. The design succeeds in imaging virtually all the light into one pixel over the HET field of view (FOV) and the wavelength range 900-1300 nm. We discuss the challenges of designing and manufacturing a fast camera for cryogenic use, and give details of the tolerance analysis.

Citation Download Citation

Carlos Tejada, Gary J. Hill, and Francisco J. Cobos "Design of an f/1 camera for the HET low-resolution spectrograph IR extension", Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); https://doi.org/10.1117/12.461961

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