![]() This innovation makes use of polymer-based membrane mirror technology to enable large-aperture mirrors that can be easily launched and deployed. Patrick, Brian Moore, James Hackenberger, Wesley Jiang, XiaoningĪ lightweight, cryogenically capable, scalable, deformable mirror has been developed for space telescopes. Hybrid Electrostatic/Flextensional Mirror for Lightweight, Large-Aperture, and Cryogenic Space Telescopes The current activity aims to the construction of an optical breadboard capable of demonstrating the achievement of all these coupled critical aspects: optical quality of the thin shell mirror surface, actuators performances and back-plane - EL subsystem functionality. The presented study concerns: a) testing the Carbon Fiber Reinforced Plastic (CFRP) backplane manufacturing and EL techniques, with production of suitable specimens b) actuator design optimisation c) design of the deployment mechanism including a high precision latch d) the fabrication of thin mirrors mock-ups to validate the fabrication procedure for the large shells. The lightweight mirror is structured as a central sector surrounded by petals, all of them actively controlled to reach the specified shape after initial deployment and then maintained within specs for the entire mission duration. The described work is developed under the ESA/ESTEC contract No. Aim of this paper is to present the latest developments on the main issues related to the fabrication of a breadboard, covering two project critical areas identified during the preliminary studies: the design and performances of the long-stroke actuators used to implement the mirror active control and the mirror survivability to launch via Electrostatic Locking (EL) between mirror and backplane. The presented topic was originally addressed to a spaceborne DIAL (Differential Absorption LIDAR) mission operating at 935.5 nm for the measurement of water vapour profile in atmosphere, whose results were presented at ICSO 20. the primary mirror: being more suitable a large aperture, it must be lightweight and deployable. The increasing interest on space telescopes for scientific applications leads to implement the manufacturing technology of the most critical element, i.e. Zuccaro Marchi, Alessandro D'Amato, Francesco Gallieni, Daniele Biasi, Roberto Molina, Marco Duò, Fabrizio Ruder, Nikolaus Salinari, Piero Lisi, Franco Riccardi, Armando Gambicorti, Lisa Simonetti, Francesca Pereira do Carmo, Joao Pedro N. Technological developments for ultra-lightweight, large aperture, deployable mirror for space telescopes The manufacturing process of the thin shell is also presented. The paper presents a comprehensive vision of the breadboard focusing on how the requirements have driven the design of the whole system and of the various subsystems. The aim is to evaluate the effective performances of the long stroke smart-actuators used for the mirror control and to demonstrate the effectiveness and the reliability of the electrostatic locking (EL) system to restraint the thin shell on the mirror backup structure during launch. An Optical BreadBoard (OBB) for LATT has been designed for investigating and testing two critical aspects of the technology: 1) control accuracy in the mirror surface shaping. ![]() The reference mission application is a potential future ESA mission, related to a space borne DIAL (Differential Absorption Lidar) instrument operating around 935.5 nm with the goal to measure water vapor profiles in atmosphere. This technology is developed under the European Space Agency (ESA) Technology Research Program and can be exploited in all the applications based on the use of primary mirrors of space telescopes with large aperture, segmented lightweight telescopes with wide Field of View (FOV) and low f/#, and LIDAR telescopes. The aim of this work is to describe the latest results of new technological concepts for Large Aperture Telescopes Technology (LATT) using thin deployable lightweight active mirrors. Gambicorti, Lisa D'Amato, Francesco Vettore, Christian Duò, Fabrizio Guercia, Alessio Patauner, Christian Biasi, Roberto Lisi, Franco Riccardi, Armando Gallieni, Daniele Lazzarini, Paolo Tintori, Matteo Zuccaro Marchi, Alessandro Pereira do Carmo, Joao Last results of technological developments for ultra-lightweight, large aperture, deployable mirror for space telescopes ![]()
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