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Gemini 8m telescopes 335202
Large Binocular Telescope Project 335204
Early performance and present status of the HobbyEberly Telescope 335206
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8-meter aberrations active optics actuators adaptive optics alignment aperture arcsec arcseconds astigmatism astronomical axial axis azimuth baffle beam beryllium camera Cassegrain chamber coating Conference on Advanced configuration conic constant coronagraph correction crate curvature developed diameter dome edge enclosure fabrication faceplate Figure focal focus force frequency Gemini glass grinding image quality infrared installed instrument interface interferometer Keck Keck Observatory Keck Telescope Large Binocular Telescope lightweight load Magellan manufacturing March 1998 SPIE maximum measurements mechanical meter microns mirror blank mirror cell mirror support mirror surface mode mount observations Observatory operation optical system optimization parameters performance phase piston errors plate polishing position primary mirror Proc reflectivity rotation secondary mirror sensor spherical spherical aberration SPIE Conference SPIE Vol stiffness stress Subaru Telescope submirror substrate support system telescope structure Telescopes Project temperature thermal thickness tilt tip-tilt wavefront sensor wavelength ZERODUR