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Proceedings Paper

Active optics at UKIRT
Author(s): Antonio C. Chrysostomou; Nicholas P. Rees; Timothy G. Hawarden; Timothy C. Chuter; Charles P. Cavedoni; Donald G. Pettie; Richard J. Bennett; Eli Ettedgui-Atad; Colin M. Humphries; Brian Mack
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Paper Abstract

The 3.8 m United Kingdom Infrared Telescope (UKIRT) has recently installed active control of the primary mirror figure, taking advantage of aspects of the original mirror design, which permits the correction of low order aberrations. In this paper, we present results from a campaign of all-sky wavefront sensing carried out UKIRT. As a result of the campaign, a lookup table is being used to correct for attitude dependent astigmatism, while fixed corrections are applied to trefoil and spherical aberrations. Coma is removed by secondary mirror alignment. A continuous, model based, correction of focus for thermal and elastic effects is also applied. Accurate focus is now maintained throughout an observing night.

Paper Details

Date Published: 25 August 1998
PDF: 6 pages
Proc. SPIE 3352, Advanced Technology Optical/IR Telescopes VI, (25 August 1998); doi: 10.1117/12.319304
Show Author Affiliations
Antonio C. Chrysostomou, Joint Astronomy Ctr. (United Kingdom)
Nicholas P. Rees, Joint Astronomy Ctr. (United States)
Timothy G. Hawarden, Joint Astronomy Ctr. (United Kingdom)
Timothy C. Chuter, Joint Astronomy Ctr. (United States)
Charles P. Cavedoni, Joint Astronomy Ctr. (United States)
Donald G. Pettie, Royal Observatory Edinburgh (United Kingdom)
Richard J. Bennett, Royal Observatory Edinburgh (United Kingdom)
Eli Ettedgui-Atad, Royal Observatory Edinburgh (United Kingdom)
Colin M. Humphries, Royal Observatory Edinburgh (United Kingdom)
Brian Mack, Royal Greenwich Observatory (United Kingdom)

Published in SPIE Proceedings Vol. 3352:
Advanced Technology Optical/IR Telescopes VI
Larry M. Stepp, Editor(s)

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