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1 July 1990 Temperature control of large honeycomb mirrors
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The Astrophysical Research Consortium, the Magellan Project, and the National Optical Astronomy Observatories are collaborating in an experiment to study temperature control of a honeycomb mirror in an observatory environment. A full-scale mockup of a 60-deg sector of a 3.5-m borosilicate honeycomb mirror was constructed of glass and installed in the Apache Point Observatory (APO) 3.5-m telescope mount. The response of this mockup (the wedge) to diurnal temperature variations was monitored by measuring the glass temperature at about 300 locations distributed throughout its volume. The temperature of the wedge can be controlled via air circulated through its interior.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Walter A. Siegmund, Larry M. Stepp, and James Lauroesch "Temperature control of large honeycomb mirrors", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990);

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