The multi-object double spectrographs for the Large Binocular Telescope

R. W. Pogge; B. Atwood; D. F. Brewer; P. L. Byard; M. A. Derwent; R. Gonzalez; P. Martini; J. A. Mason; T. P. O'Brien; P. S. Osmer; D. P. Pappalardo; D. P. Steinbrecher; E. J. Teiga; R. Zhelem

doi:10.1117/12.857215

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14 July 2010 The multi-object double spectrographs for the Large Binocular Telescope

R. W. Pogge; B. Atwood; D. F. Brewer; P. L. Byard; M. A. Derwent; R. Gonzalez; P. Martini; J. A. Mason; T. P. O'Brien; P. S. Osmer; D. P. Pappalardo; D. P. Steinbrecher; E. J. Teiga; R. Zhelem

Author Affiliations +

R. W. Pogge , B. Atwood , D. F. Brewer , P. L. Byard , M. A. Derwent , R. Gonzalez , P. Martini , J. A. Mason , T. P. O'Brien , P. S. Osmer , D. P. Pappalardo , D. P. Steinbrecher , E. J. Teiga , R. Zhelem
The Ohio State Univ. (United States)

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 77350A (2010) https://doi.org/10.1117/12.857215
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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Abstract

The Multi-Object Double Spectrographs (MODS) are two identical high-throughput optical low- to medium-resolution CCD spectrometers being deployed at the Large Binocular Telescope (LBT). Operating in the 340-1000nm range, they use a large dichroic to split light into separately-optimized red and blue channels that feature reflective collimators and decentered Maksutov-Schmidt cameras with monolithic 8×3K CCD detectors. A parallel infrared laser closed-loop image motion compensation system nulls spectrograph flexure giving it high calibration stability. The two MODS instruments may be operated together with digital data combination as a single instrument giving the LBT an effective aperture of 11.8-meter, or separately configured to flexibly use the twin 8.4-meter apertures. This paper describes the properties and performance of the completed MODS1 instrument. MODS1 was delivered to LBT in May 2010 and is being prepared for first-light in September 2010.

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R. W. Pogge, B. Atwood, D. F. Brewer, P. L. Byard, M. A. Derwent, R. Gonzalez, P. Martini, J. A. Mason, T. P. O'Brien, P. S. Osmer, D. P. Pappalardo, D. P. Steinbrecher, E. J. Teiga, and R. Zhelem "The multi-object double spectrographs for the Large Binocular Telescope", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77350A (14 July 2010); doi: 10.1117/12.857215; https://doi.org/10.1117/12.857215

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KEYWORDS

Spectrographs

Astronomical imaging

Calibration

Telescopes

Cameras

Lamps

Sensors

Image quality

Mirrors

Prisms

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R. W. Pogge, B. Atwood, D. F. Brewer, P. L. Byard, M. A. Derwent, R. Gonzalez, P. Martini, J. A. Mason, T. P. O'Brien, P. S. Osmer, D. P. Pappalardo, D. P. Steinbrecher, E. J. Teiga, R. Zhelem, "The multi-object double spectrographs for the Large Binocular Telescope," Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77350A (14 July 2010);

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