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Construction of the Keck Observatory
Status of the VLT Project
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8m telescopes accuracy active actuators adaptive optics analysis angle aperture arc seconds arcsec aspheric astronomical atmospheric axial support azimuth borosilicate honeycomb Cassegrain focus Columbus Project concept Conference configuration correction corrector deformation diameter diffraction distortion dome elevation axis European Southern Observatory f-ratio field of view finite element focal ratio force frequency glass gradient hexagonal honeycomb mirrors image quality infrared instruments interferogram interferometric JNLT Keck Keck telescope large telescopes lensm load Mauna Kea measured mechanical meniscus meter mirror blank mirror segments mirror support mirror surface mounting Nasmyth NOAO Nordic Optical Telescope Observatory operation Optical Telescope optimized performance phase plate points polishing position possible primary mirror radial reduced rotation Schmidt telescopes Schnur secondary mirror sphere spherical aberration stiffness stressed lap support system technique telescope structure temperature thickness tilt tool tracking tube wavefront weight wind zenith Zerodur