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Proceedings Paper

Gemini 8.2-m primary mirror no. 1 polishing
Author(s): Marc Cayrel; P. Beraud; Jacques Paseri; E. Dromas
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Paper Abstract

The 8-m class primary mirrors of the GEMINI Telescopes are thin ULE menisci actively supported. The two mirror blanks are produced by CORNING, the optical figuring, manufacturing and assembling of interfaces are done by REOSC. REOSC is as well in charge of the transportation of the mirror blanks from CORNING to REOSC, and of the shipment of the finished optics to Hawaii and to Chile. The mirror assembly requirements are summarized, the manufacturing and testing methods are addressed. REOSC had to design and manufacture a dedicated active supporting system, representative of the one used at the telescope level. Its design and performance are presented. The manufacturing steps undertaken at REOSC and the results achieved are then detailed: mirror blank surface generating and grinding, polishing, testing. The current status of the mirrors is finally presented.

Paper Details

Date Published: 25 August 1998
PDF: 11 pages
Proc. SPIE 3352, Advanced Technology Optical/IR Telescopes VI, (25 August 1998); doi: 10.1117/12.319256
Show Author Affiliations
Marc Cayrel, REOSC (France)
P. Beraud, REOSC (France)
Jacques Paseri, REOSC (France)
E. Dromas, REOSC (France)

Published in SPIE Proceedings Vol. 3352:
Advanced Technology Optical/IR Telescopes VI
Larry M. Stepp, Editor(s)

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