An aplanatic meniscus lens for correcting astigmatism in Ritchey-Chrétien telescopes

Michelle C. Rocha; Alexander V. Goncharov

doi:10.1117/12.2570013

13 December 2020 An aplanatic meniscus lens for correcting astigmatism in Ritchey-Chrétien telescopes

Michelle C. Rocha, Alexander V. Goncharov

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114514E (2020) https://doi.org/10.1117/12.2570013
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

An afocal meniscus lens is proposed for reducing intrinsic astigmatism in an RC telescope. In comparison to existing solutions using thin aspheric plates near focus, the proposed solution does not disrupt the aplanatic correction of the initial RC design but reduces astigmatism and eliminates field curvature. Despite some residual lateral color introduced by the lens corrector, the field of view in the original RC design can be extended by a factor of 2 while maintaining the diffraction-limited image quality in the system.

Conference Presentation

Citation Download Citation

Michelle C. Rocha and Alexander V. Goncharov "An aplanatic meniscus lens for correcting astigmatism in Ritchey-Chrétien telescopes", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114514E (13 December 2020); https://doi.org/10.1117/12.2570013

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