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|Title:||A novel approach for the realization of thin glass substrates for optical mirrors||Authors:||VECCHI, Gabriele
CIVITANI, Marta Maria
|Issue Date:||2018||Volume:||Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III||Editors:||Navarro, Ramon; Geyl, Roland||Series:||PROCEEDINGS OF SPIE||Number:||10706||First Page:||107060H-1||Abstract:||We present a manufacturing process based on the deterministic polishing and figuring of thin glass substrates (shells), with thickness ranging from 0.5 up to a few millimeters, in "stand-alone" configuration or as part of a composite sandwich structure with low-density core. The methods will be well suited for a broad range of applications in astronomy like, e.g., the production of thin substrates for adaptive optics, the realization of sandwiched lightweight segments for the mirrors of future ground-based and space telescopes, and the realization of low-cost mirrors for amateur astronomy telescopes. The method foresees the pre-shaping of thin glass substrates via hot slumping technology followed by highprecision form correction of the optical surfaces via computer-controlled bonnet and ion beam figuring technologies. During the phase of bonnet polishing of a shell in stand-alone configuration, a removable holder stiffens it temporarily. This paper describes the main steps of the process under study and reports on the realization of the first prototypes.||Conference Name:||Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III||Conference Place:||Austin, Texas, USA||Conference Date:||10-15 June, 2018||URI:||http://hdl.handle.net/20.500.12386/28090||URL:||https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10706/107060H/A-novel-approach-for-the-realization-of-thin-glass-substrates/10.1117/12.2313508.full||ISSN:||0277-786X||ISBN:||9781510619661||DOI:||10.1117/12.2313508||Bibcode ADS:||2018SPIE10706E..0HV||Fulltext:||open|
|Appears in Collections:||3.01 Contributi in Atti di convegno|
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