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Proceedings Paper

Two-mirror three-reflection telescopes as candidates for sky surveys in ground and space applications: The MINITRUST: an active optics warping telescope for wide-field astronomy
Author(s): Roberto F. Viotti; Cesare D. La Padula; Agostino Vignato; Gerard R. Lemaitre; Pierre Montiel; Kjetil Dohlen
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Paper Abstract

A concept based on a two-mirror, three-reflection telescope has been investigated. Its anastigmatism and flat fielded properties, the compactness and optical performances over 2-2.5 arc deg field of view, make this optical system of high interest for the development of much larger telescopes than with Schmidt designs. The 2MTRT concept is a potential candidate for sky surveys with 2-3 meter class telescopes and particularily well adapted for UV space surveys. Preliminary developments have been carried out with the construction of a 30-cm prototype on Amoretti's design, providing encouraging results. At present, a 45-cm 2MTRT prototype has been realized for ground based sky survey of NEOs, based on active optics (MINITRUST), in order to overcome the difficulty of obtaining three aspherical surfaces. The primary and tertiary lie on the same double vase substrate, and have a rest profile. The hyperbolization is carried out in situ by air depressure. The secondary, in a tulip form substrate, has been hyperbolized by elastic relaxation. The project is planned for operation in 2003.

Paper Details

Date Published: 18 December 2002
PDF: 7 pages
Proc. SPIE 4849, Highly Innovative Space Telescope Concepts, (18 December 2002); doi: 10.1117/12.460574
Show Author Affiliations
Roberto F. Viotti, Istituto di Astrofisica Spaziale (Italy)
Cesare D. La Padula, Istituto di Astrofisica Spaziale (Italy)
Agostino Vignato, Osservatorio Astronomico di Roma (Italy)
Gerard R. Lemaitre, Observatoire Astronomique de Marseille Provence (France)
Pierre Montiel, Observatoire Astronomique de Marseille Provence (France)
Kjetil Dohlen, Observatoire Astronomique de Marseille Provence (France)

Published in SPIE Proceedings Vol. 4849:
Highly Innovative Space Telescope Concepts
Howard A. MacEwen, Editor(s)

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