4 November 1982 Infrared Performance Of The University Of California Ten Meter Telescope
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Abstract
We have considered the performance of the University of California Ten Meter Telescope (TMT) in the thermal infrared. At around 10 μm the thermal background seen by a detector in the focal plane is dominated by emission from the telescope itself since the atmospheric emission is often very low. Several aspects of telescope design are of crucial importance for optimum performance to be achieved in the infrared, the main goals being to minimize the background radiation and to keep fluctuations in that background to an acceptably low level. We have considered the effects of telescope design parameters in two classes: 1. The usual set of mechanical and optical constraints on design that are encountered in optimizing the performance of a conventional monolithic IR telescope. These include minimization of background radiation from telescope mirrors and support structure, chopping secondary design, etc. 2. Potential additional constraints arising from the segmented design of the primary mirror. These include the effects of the "cracks" between segments and consideration of the active control mechanism. We presently see no problems in the telescope design which will adversely affect IR performance and we consider that the actual performance of the TMT will be determined solely by the quality of its instrumentation and the properties of the atmosphere.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Barbara Jones, Keith Matthews, "Infrared Performance Of The University Of California Ten Meter Telescope", Proc. SPIE 0332, Advanced Technology Optical Telescopes I, (4 November 1982); doi: 10.1117/12.933511; https://doi.org/10.1117/12.933511
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