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Proceedings Paper

ASM: scaled down active segmented mirror developed to simulate a segmented primary mirror
Author(s): Christophe Dupuy; Christoph Frank; Frédéric Gonté; Constanza Araujo Hauck; Roland Brast; Regina Esteves; Matti Nylund; Babak Sedghi; Frédéric Derie
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Paper Abstract

The Active Segmented Mirror is a key subsystem of the Active Phasing Experiment. The size of the ASM is 154 mm in diameter. It will be used to test new types of phasing sensors recently developed within the ELT design study supported by the European Union. To our knowledge it is the first time that such miniature active optics composed of hexagonal segments having 3 degrees of freedom with a resolution of the order of a few nanometers and a range of several micrometers is manufactured. The ASM is composed of 61 hexagonal segments called "modules". Each module is assembled, glued and integrated from standard (piezo-actuators) and custom-made (mirrors, mechanics) parts procured from industries. The ASM has been designed and integrated at the European Southern Observatory. Specifications, designs, assembly tools, hand work skills, electronics, software, control algorithms and test procedures are the field of competences required to obtain in the end a "plug and play" product. The concept of the ASM is tested and validated by a prototype version composed of 7 modules equivalent of the central area of the ASM itself. The design, integration and results of the ASM tests are presented.

Paper Details

Date Published: 6 July 2006
PDF: 12 pages
Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62733E (6 July 2006); doi: 10.1117/12.672918
Show Author Affiliations
Christophe Dupuy, European Southern Observatory (Germany)
Christoph Frank, European Southern Observatory (Germany)
Frédéric Gonté, European Southern Observatory (Germany)
Constanza Araujo Hauck, European Southern Observatory (Germany)
Roland Brast, European Southern Observatory (Germany)
Regina Esteves, European Southern Observatory (Germany)
Matti Nylund, European Southern Observatory (Germany)
Babak Sedghi, European Southern Observatory (Germany)
Frédéric Derie, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 6273:
Optomechanical Technologies for Astronomy
Eli Atad-Ettedgui; Joseph Antebi; Dietrich Lemke, Editor(s)

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