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Proceedings Paper

Optical design of a visible and infrared survey telescope for astronomy
Author(s): Eli Ettedgui-Atad; Mark M. Casali; Timothy G. Hawarden; David M. Henry; Susan P. Worswick
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Paper Abstract

A number of preliminary optical designs for a new generation of 4 meter astronomical survey telescopes have been investigated. These have large fields of view and operate in both the visible and near IR astronomical wavebands. Typical requirements for dual band systems of this type are presented. Two designs for prime focus refractive field corrector systems are presented, with and without aspheric surfaces. The use of aspheric surfaces on the field corrector lenses is shown to allow a large field of view to be achieved. A design for a three mirror reflective system is presented which also allows a 2 degree field to be achieved. An IR imager, based on a modified Schmidt camera, is presented which allows a 1 degree field of view to be achieved. Additionally, a modified Ritchey-Chretien telescope, incorporating refracting field corrector lenses is presented. This design provides a large field of view over both the visible and IR wavebands. The mechanical constraints of combining these systems into dual channel systems are also discussed.

Paper Details

Date Published: 5 October 1999
PDF: 11 pages
Proc. SPIE 3779, Current Developments in Optical Design and Optical Engineering VIII, (5 October 1999); doi: 10.1117/12.368234
Show Author Affiliations
Eli Ettedgui-Atad, Royal Observatory Edinburgh (United Kingdom)
Mark M. Casali, Royal Observatory Edinburgh (United Kingdom)
Timothy G. Hawarden, Joint Astronomy Ctr. (United Kingdom)
David M. Henry, Royal Observatory Edinburgh (United Kingdom)
Susan P. Worswick, Royal Observatory Edinburgh (United Kingdom)

Published in SPIE Proceedings Vol. 3779:
Current Developments in Optical Design and Optical Engineering VIII
Robert E. Fischer; Warren J. Smith, Editor(s)

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