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http://hdl.handle.net/20.500.12386/28090
Title: | A novel approach for the realization of thin glass substrates for optical mirrors | Authors: | VECCHI, Gabriele BASSO, Stefano CANESTRARI, Rodolfo CIVITANI, Marta Maria GHIGO, Mauro Hołyszko, J. PARESCHI, Giovanni SALMASO, Bianca |
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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File | Description | Size | Format | |
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107060H.pdf | Pdf editoriale | 1.16 MB | Adobe PDF | View/Open |
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