Optical design of a visible and infrared survey telescope for astronomy

Eli Ettedgui-Atad; Mark M. Casali; Timothy G. Hawarden; David M. Henry; Susan P. Worswick

doi:10.1117/12.368234

5 October 1999 Optical design of a visible and infrared survey telescope for astronomy

Eli Ettedgui-Atad, Mark M. Casali, Timothy G. Hawarden, David M. Henry, Susan P. Worswick

Proceedings Volume 3779, Current Developments in Optical Design and Optical Engineering VIII; (1999) https://doi.org/10.1117/12.368234
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

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.

Citation Download Citation

Eli Ettedgui-Atad, Mark M. Casali, Timothy G. Hawarden, David M. Henry, and Susan P. Worswick "Optical design of a visible and infrared survey telescope for astronomy", Proc. SPIE 3779, Current Developments in Optical Design and Optical Engineering VIII, (5 October 1999); https://doi.org/10.1117/12.368234

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KEYWORDS

Mirrors

Telescopes

Aspheric lenses

Image quality

Lenses

Imaging systems

Infrared telescopes

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