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Proceedings Paper

Development of a wide-field spherical aberration corrector for the Hobby Eberly Telescope
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Paper Abstract

A 4-mirror prime focus corrector is under development to provide seeing-limited images for the 10-m aperture Hobby- Eberly Telescope (HET) over a 22 arcminute wide field of view. The HET uses an 11-m fixed elevation segmented spherical primary mirror, with pointing and tracking performed by moving the prime focus instrument package (PFIP) such that it rotates about the virtual center of curvature of the spherical primary mirror. The images created by the spherical primary mirror are aberrated with 13 arcmin diameter point spread function. The University of Arizona is developing the 4-mirror wide field corrector to compensate the aberrations from the primary mirror and present seeing limited imaged to the pickoffs for the fiber-fed spectrographs. The requirements for this system pose several challenges, including optical fabrication of the aspheric mirrors, system alignment, and operational mechanical stability.

Paper Details

Date Published: 5 August 2010
PDF: 10 pages
Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77331J (5 August 2010); doi: 10.1117/12.857835
Show Author Affiliations
James H. Burge, College of Optical Sciences, The Univ. of Arizona (United States)
S. Benjamin, College of Optical Sciences, The Univ. of Arizona (United States)
M. Dubin, College of Optical Sciences, The Univ. of Arizona (United States)
A. Manuel, College of Optical Sciences, The Univ. of Arizona (United States)
M. Novak, College of Optical Sciences, The Univ. of Arizona (United States)
C. J. Oh, College of Optical Sciences, The Univ. of Arizona (United States)
M. Valente, College of Optical Sciences, The Univ. of Arizona (United States)
C. Zhao, College of Optical Sciences, The Univ. of Arizona (United States)
J. A. Booth, McDonald Observatory, The Univ. of Texas at Austin (United States)
J. M. Good, McDonald Observatory, The Univ. of Texas at Austin (United States)
Gary J. Hill, McDonald Observatory, The Univ. of Texas at Austin (United States)
H. Lee, McDonald Observatory, The Univ. of Texas at Austin (United States)
P. J. MacQueen, McDonald Observatory, The Univ. of Texas at Austin (United States)
M. Rafal, McDonald Observatory, The Univ. of Texas at Austin (United States)
R. Savage, McDonald Observatory, The Univ. of Texas at Austin (United States)
M. P. Smith, McDonald Observatory, The Univ. of Texas at Austin (United States)
B. Vattiat, McDonald Observatory, The Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 7733:
Ground-based and Airborne Telescopes III
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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