ATTENZIONE! IL REPOSITORY E’ APERTO ESCLUSIVAMENTE ALL’IMMISSIONE DEI RAPPORTI TECNICI (COLLEZIONE 4.01). NON E’ POSSIBILE INSERIRE PRODOTTI IN TUTTE LE ALTRE COLLEZIONI, A CAUSA DI PROBLEMI TECNICI. THE REPOSITORY IS OPEN EXCLUSIVELY FOR THE SUBMISSION OF TECHNICAL REPORTS (COLLECTION 4.01). SUBMISSIONS TO ALL OTHER COLLECTIONS ARE TEMPORARILY UNAVAILABLE, DUE TO TECHNICAL ISSUES.
 

The VST active primary mirror support system

Date Issued
2010
Author(s)
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Capaccioli, Massimo
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Ferragina, Luigi
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Tomelleri, Raffaele
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Rossettini, Pierfrancesco
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Perina, Francesco
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Recchia, Stefano
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DOI
Abstract
The 2.6-m primary mirror of the VST telescope is equipped with an active optics system in order to correct low-order aberrations, constantly monitoring the optical quality of the image and controlling the relative position and the shape of the optical elements. Periodically an image analyser calculates the deviation of the image from the best quality. VST is equipped with both a Shack-Hartmann in the probe system and a curvature sensor embedded in the OmegaCAM instrument. The telescope control software decomposes the deviation into single optical contributions and calculates the force correction that each active element has to perform to achieve the optimal quality. The set of correction forces, one for each axial actuator, is computed by the telescope central computer and transmitted to the local control unit of the primary mirror system for execution. The most important element of the VST active optics is the primary mirror, with its active support system located within the primary mirror cell structure. The primary mirror support system is composed by an axial and a lateral independent systems and includes an earthquake safety system. The system is described and the results of the qualification test campaign are discussed.
Coverage
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
All editors
Atad-Ettedgui, Eli; Lemke, Dietrich
Series
Start page
773931--
Conferenece
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
Conferenece place
San Diego, California, United States
Conferenece date
27 June - 2 July, 2010
Uri
Url
Issn Identifier
0277-786X
Ads BibCode
2010SPIE.7739E..31S
Rights
open.access
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The_VST_active_primary_mirror_supp_system.pdf

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2.8 MB

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