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Lunarbased astronomical observatories 193102
MATERIALS PROCESSES COATINGS AND FINISHES
LAMA Large Active Mirrors in Aluminium programme 193104
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25 m telescope active optics active supports adaptive optics alignment aluminium alloy aluminum mirrors aperture applied arcmin arcsec arcseconds asphericity astigmatism astronomical beam welding Bingham Cassegrain convection cooling correction cost curvature deformations diameter Dierickx diffraction effects electron beam electron beam welding Electron-beam welded enclosure European Southern Observatory flux collector front surface glass mirrors gradients heat honeycomb image quality interferometric JCMT Kitt Peak large telescopes Lemaitre lightweight loading machine manufacturing material measured meniscus metal mirrors methods metres microns mirror surface nickel nickel coating Nordic Optical Telescope Observatory optical design optical figure optical quality optical surface Optical Telescope panels plate polishing possible Proc produced programme quaternary mirror rear surface reduce rotation Rozelot secondary mirror seismology solar telescope spherical aberration SPIE steel stress structure technique TELAS Tenzaloy tests thermal cycles thermal expansion thickness wavefront error wavefront sensor welded mirror Zerodur