Prime focus wide-field corrector designs with lossless atmospheric dispersion correction

Will Saunders; Peter Gillingham; Greg Smith; Steve Kent; Peter Doel

doi:10.1117/12.2055662

18 July 2014 Prime focus wide-field corrector designs with lossless atmospheric dispersion correction

Will Saunders, Peter Gillingham, Greg Smith, Steve Kent, Peter Doel

Proceedings Volume 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation; 91511M (2014) https://doi.org/10.1117/12.2055662
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Wide-Field Corrector designs are presented for the Blanco and Mayall telescopes, the CFHT and the AAT. The designs are Terezibh-style, with 5 or 6 lenses, and modest negative optical power. They have 2.2°-3° ields of view, with curved and telecentric focal surfaces suitable for fiber spectroscopy. Some variants also allow wide-field imaging, by changing the last WFC element. Apart from the adaptation of the Terebizh design for spectroscopy, the key feature is a new concept for a ‘Compensating Lateral Atmospheric Dispersion Corrector’, with two of the lenses being movable laterally by small amounts. This provides excellent atmospheric dispersion correction, without any additional surfaces or absorption. A novel and simple mechanism for providing the required lens motions is proposed, which requires just 3 linear actuators for each of the two moving lenses.

Citation Download Citation

Will Saunders, Peter Gillingham, Greg Smith, Steve Kent, and Peter Doel "Prime focus wide-field corrector designs with lossless atmospheric dispersion correction", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91511M (18 July 2014); https://doi.org/10.1117/12.2055662

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