VLT primary mirrors: mirror production and measured performance

Details VLT primary mirrors: mirror production and measured performance VLT primary mirrors: mirror production and measured performance

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.2871..385d&link_type=abstract

Proc. SPIE Vol. 2871, p. 385-392, Optical Telescopes of Today and Tomorrow, Arne L. Ardeberg; Ed.

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The primary mirrors of the ESO 8-m class very large telescopes are actively supported, thin Zerodur menisci, 8 - .2-m diameter. The mirror blanks are produced by SCHOTT; the optical figuring, manufacturing and assembling of interfaces and auxiliary equipment are done by REOSC. Three mirror blanks have already been delivered by SCHOTT to REOSC. In November 1995 the project met a critical and very successful milestone, with the completion and testing of the first finished VLT primary mirror at REOSC. Specifications, manufacturing and above all testing methodology are addressed, and the final results are detailed. Optical performance at telescope level is assessed as well.

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