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Proceedings Paper

Spartan infrared camera: high-resolution imaging for the SOAR Telescope
Author(s): Edwin D. Loh; Jason D. Biel; Jian-Jun Chen; Michael Davis; Rene Laporte; Owen Y. Loh
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Paper Abstract

The Spartan Infrared Camera provides tip-tilt corrected imaging for the SOAR Telescope in the 1-2.5μm spectral range with four 2048x2048 HAWAII2 detectors. The median image size is expected to be less than 0.25 arcsec (FWHM), and in the H and K bands a significant amount of the light is expected to be in a core having the diffraction-limited width. The camera has two plate scales: 0.04 arcsec/pixel (f/21) for diffraction-limited sampling in the H and K bands and 0.07 arcsec/pixel (f/12) to cover a 5×5 arcmin2 field, over which tip-tilt correction is substantial. Except for CaF2 field-flattening lenses, the optics is all reflective to achieve the large field size and achromaticity, and all aluminum to match thermally the aluminum cryogenic-optical box in which the optics mount. The Strehl ratio of the camera itself is 0.95-1.00 for the f/21 channel. The optics (including the off-axis aspherical mirrors) will be aligned with precise metrology rather than adjusted using interferometry.

Paper Details

Date Published: 30 September 2004
PDF: 9 pages
Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); doi: 10.1117/12.551808
Show Author Affiliations
Edwin D. Loh, Michigan State Univ. (United States)
Jason D. Biel, Michigan State Univ. (United States)
Jian-Jun Chen, Michigan State Univ. (United States)
Michael Davis, Michigan State Univ. (United States)
Rene Laporte, Istituto Nacional de Pesquisas Espaciais (Brazil)
Owen Y. Loh, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 5492:
Ground-based Instrumentation for Astronomy
Alan F. M. Moorwood; Masanori Iye, Editor(s)

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