Laboratory demonstration of a primary active mirror for space with the LATT: large aperture telescope technology

Briguglio, Runa; Biasi, Roberto; Gallieni, Daniele; Vettore, Christian; D’Amato, Francesco; Xompero, Marco; Arcidiacono, Carmelo; Lisi, F.; Riccardi, Armando; Patauner, Christian; Lazzarini, Paolo; Tintori, Matteo; Duò, Fabrizio; Pucci, Mauro; Marchi, A. Zuccaro; Maresi, Luca

doi:10.1117/12.2231726

Cited by 10 publications

(11 citation statements)

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“…The following sub-aperture polishing/figuring process applies on the thin slumped shells to correct the residual surface errors. Finally, the shells can be assembled into lightweight supporting structures, targeting overall values of areal density <20 Kg/m 2 [6,21].…”

Section: Discussionmentioning

confidence: 99%

Thin glass shells for active optics for future space telescopes

et al. 2019

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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, while leveraging 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 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 temporary stiffened by a removable holder. In this paper, we report on the results so far achieved on a 130 mm glass shell case study.

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Section: Discussionmentioning

confidence: 99%

Thin glass shells for active optics for future space telescopes

et al. 2019

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“…This criticality is fully solved by the adoption at mirror level of the LATT technology (Ref. [6] recovering of a nominal alignment even in presence of thermal gradients.…”

Section: Pos(icrc2017)222 Pos(icrc2017)222mentioning

confidence: 99%

“…The following project LATT (Large Aperture Telescope Technology) (Ref. [6] and [7]) extended the study, producing an Optical demonstrator Bread Board (OBB), made by a 400 mm diameter, 1 mm thick, ZERODUR®glass, coupled to a backplane by 19 actuators controlling the optical surface. The long stroke of the actuators, about 1 mm, guarantees the optical performances, compensating mechanical deployment errors and other deformation due to the thermal and mechanical environment.…”

Section: Introductionmentioning

confidence: 99%

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Wide FoV and large pupil ‘active’ Schmidt telescope toward a space based UHE neutrino Observatory and a highly sensitive Observatory of the Earth

Mazzinghi¹,

Sandri²,

Спиллантини³

2018

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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The possible realization of the wide FoV and large pupil Schmidt recently proposed for a space instrument opens the possibility of realizing even more large pupil optical telescopes in space. This development is impo the terrestrial surface and events in the terrestrial atmosphere, as well for astronomical observations requiring a high sensitivity and good resolution on a very wide FoV. with pupils of tens of meters diameter can be obtained with a huge primary mirror of a Schmidt telescope by assembling and opening in space several 'active' sub dimensions. measurement of the fluorescence light emitted by particle showers produced by extreme energy primary cosmic rays, and among them detection and measurement of events produced by ultra energy neutri neutrinos produced by the energy loss of charged cosmic rays produced at large distance (>100 Mpc) from the Earth). Some examples of such possible optical systems are evaluated in detail. ABSTRACTThe possible realization of the wide FoV and large pupil Schmidt recently proposed for a space instrument opens the possibility of realizing even more large pupil optical telescopes in space. This development is impo the terrestrial surface and events in the terrestrial atmosphere, as well for astronomical observations requiring a high sensitivity and good resolution on a very wide FoV. with pupils of tens of meters diameter can be obtained with a huge primary mirror of a Schmidt telescope by assembling and opening in space several 'active' sub dimensions. For fundamental research in p measurement of the fluorescence light emitted by particle showers produced by extreme energy primary cosmic rays, and among them detection and measurement of events produced by ultra energy neutri neutrinos produced by the energy loss of charged cosmic rays produced at large distance (>100 Mpc) from the Earth). Some examples of such possible optical systems are evaluated in detail.

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“…A summary of the OBB characteristics is in Tab. 1 and a more extensive description may be found in [8]. The system is composed of three elements: a reference body (RB), the TS, the control electronics.…”

Section: Laboratory Demonstration With the Optical Breadboard (Obmentioning

confidence: 99%