Making mirrors for giant telescopes - SPIE Digital Library
Similar mirrors are used as the 3.4 m secondary mirror of the Large Synoptic Survey Telescope (LSST) and the 4 m secondary and tertiary mirrors of ESO's ELT. Also around the same time, Roger Angel at the University of Arizona developed a way to maintain the stiffness of traditional mirrors but with a small fraction of the weight, extending the 200 inch design to 8 m and with …
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