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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29115
Title: Thin glass shells for active optics for future space telescopes
Authors: VECCHI, Gabriele 
BASSO, Stefano 
CIVITANI, Marta Maria 
GHIGO, Mauro 
PARESCHI, Giovanni 
SALMASO, Bianca 
Issue Date: 2019
Journal: CEAS SPACE JOURNAL 
Number: 11
First Page: 533
Abstract: We present a method for the manufacturing of thin shells of glass, which appears promising for the development of active optics for future space telescopes. The method exploits the synergy of different mature technologies, and leverages the commercial availability of large, high-quality sheets of glass, with thickness up to few millimeters. The first step of the method foresees the pre-shaping of flat substrates of glass by replicating the accurate shape of a mold via direct hot slumping technology. The replication concept is advantageous for making large optics composed of many identical or similar segments. After the hot slumping, the shape error residual on the optical surface is addressed by applying a deterministic sub-aperture technology as computer-controlled bonnet polishing and/or ion beam figuring. Here we focus on the bonnet polishing case, during which the thin, deformable substrate of glass is temporarily stiffened by a removable holder. In this paper, we report on the results so far achieved on a 130 mm glass shell case study.
Note: This is a post-peer-review, pre-copyedit version of an article published in CEAS Space Journal. The final authenticated version is available online at: https://link.springer.com/article/10.1007/s12567-019-00259-7
URI: http://hdl.handle.net/20.500.12386/29115
URL: https://link.springer.com/article/10.1007/s12567-019-00259-7
ISSN: 1868-2502
DOI: 10.1007/s12567-019-00259-7
Bibcode ADS: 2019CEAS..tmp..255V
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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Thin glass shells for active optics for future space telescopes_POSTPRINT.pdfpostprint1.17 MBAdobe PDFView/Open
Vecchi2019_Article_ThinGlassShellsForActiveOptics.pdf[Administrators only]1.43 MBAdobe PDF
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