OWL opto-mechanics: phase A

Brunetto, Enzo; Dimmler, M.; Koch, Franz; Quattri, M.; Müller, Michael; Sedghi, B.

doi:10.1117/12.555915

Cited by 4 publications

(6 citation statements)

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“…Preliminary analyses indicate that the telescope kinematics should be able to point and track to sub-arc second accuracy [10]. Field stabilization is required to compensate for the effect of wind on the primary and secondary mirrors, and to a lesser extent on the corrector.…”

Section: Wavefront Controlmentioning

confidence: 99%

“…By design, OWL is insensitive to lateral M1-M2 decenters, and the parallelogram-shaped structural modules tend to naturally favour lateral decenters over tilt. The structure being mostly exposed to laminar wind flow, image motion is essentially quasi-static and within the correction range of field stabilization with M6 [10].…”

Section: Wavefront Controlmentioning

confidence: 99%

“…6) has been the subject of a major iteration [10], with the initial four-fold symmetry being replaced by a six-fold one. This allows for a near-circular outer rim, and a structural geometry matching that of the segments.…”

Section: Opto-mechanical Designmentioning

confidence: 99%

“…This solution has been selected against hydraulic pads and tracks, which would imply very high costs and unrealistic dimensional tolerances over very large scales. A control model is being assembled [10], under contract with the Technische Universität München and Ecole Polytechnique Fédérale de Lausanne. A breadboard is also foreseen as part of a technology development proposal submitted to the European Commission within Framework Programme 6.…”

Section: Opto-mechanical Designmentioning

confidence: 99%

“…The secondary mirror being flat, its lateral decenter is of no consequence. Extensive analyses of the design are presented elsewhere [10]. These analyses rely on detailed Finite Element models including segments supports as well as friction drives.…”

Section: Opto-mechanical Designmentioning

confidence: 99%

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OWL phase A status report

Dierickx¹,

Brunetto²,

Comerón³

et al. 2004

SPIE Proceedings

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Progress in the conceptual design phase of ESO's OWL 100-m optical and near-infrared telescope is reported, with emphasis on the development of the science case. The Phase A opto-mechanical design is now basically completed, and provides a clean, symmetrical geometry of the pupil, with a near-circular outer edge. We also report about the latest outcome of industrial studies, introduce the essential definition of the wavefront control systems, and outline operational concepts and instruments priorities. Finally, we elaborate on the favorable cost factors associated to the telescope design, its compatibility with low industrial risks, and argue that progressive implementation allows for competitive timescales. In particular, we show that suitable fabrication and integration schemes should accommodate for a start of science operation at unequalled potential and within a time frame comparable to that of smaller designs, while at the same time maximizing R&D time for critical subsystems.

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Section: Wavefront Controlmentioning

confidence: 99%

Section: Wavefront Controlmentioning

confidence: 99%

Section: Opto-mechanical Designmentioning

confidence: 99%

Section: Opto-mechanical Designmentioning

confidence: 99%

Section: Opto-mechanical Designmentioning

confidence: 99%

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