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2 August 2000 Thermal performance and facility seeing at the upgraded 3.8-m UK Infrared Telescope (UKIRT)
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The upgraded 3.8 m UK Infrared Telescope employs active control of the primary mirror figure and secondary mirror alignment to constrain intrinsic wavefront errors, currently to approximately 180 nm, while a fast guider controls a tip- tilt secondary to remove telescope vibrations and tracking errors. It routinely produces images with FWHM below 0.'5 at 2.2 micrometers wavelength (the K-band). The best fully-sampled image yet recorded has FWHM equals 0.'171 and is believed still to be the best ever achieved by a ground-based telescope without the use of higher-order adaptive optics.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Timothy G. Hawarden, Andrew J. Adamson, Timothy C. Chuter, Nicholas P. Rees, Richard J. Massey, Charles P. Cavedoni, and Eli Ettedgui-Atad "Thermal performance and facility seeing at the upgraded 3.8-m UK Infrared Telescope (UKIRT)", Proc. SPIE 4004, Telescope Structures, Enclosures, Controls, Assembly/Integration/Validation, and Commissioning, (2 August 2000);


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