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A facility to evaluate the focusing performance of mirrors for Cherenkov Telescopes

Journal
Date Issued
2016
Author(s)
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GIRO, Enrico
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DOI
Abstract
Cherenkov Telescopes are equipped with optical dishes of large diameter - in general based on segmented mirrors - with typical angular resolution of a few arc-minutes. To evaluate the mirror's quality specific metrological systems are required that possibly take into account the environmental conditions in which typically these telescopes operate (in open air without dome protection). For this purpose a new facility for the characterization of mirrors has been developed at the labs of the Osservatorio Astronomico di Brera of the Italian National Institute of Astrophysics. The facility allows the precise measurement of the radius of curvature and the distribution of the concentred light in terms of focused and scattered components and it works in open air. In this paper we describe the facility and report some examples of its measuring capabilities.
Volume
806
Start page
61
Uri
Url
Issn Identifier
0168-9002
Ads BibCode
2016NIMPA.806...61C
Rights
open.access
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