A quasi-aplanatic refractive pair for correcting astigmatism in Ritchey-Chrétien telescopes

Michelle C. Rocha; Alexander V. Goncharov

doi:10.1117/12.2596028

12 September 2021 A quasi-aplanatic refractive pair for correcting astigmatism in Ritchey-Chrétien telescopes

Michelle C. Rocha, Alexander V. Goncharov

Proceedings Volume 11871, Optical Design and Engineering VIII; 1187108 (2021) https://doi.org/10.1117/12.2596028
Event: SPIE Optical Systems Design, 2021, Online Only

Abstract

A quasi-aplanatic two-lens design is proposed to correct astigmatism in Ritchey-Chr´etien (RC) telescopes at different spectral bands. This pair of lenses is designed analytically so that it can be used in existing RC telescopes without any modification of the mirror’s shapes while introducing only a small amount of coma. The field of view (FoV) is consequently increased due to the astigmatism being corrected by the two lenses and due to the final image being flattened. Astigmatism can be corrected individually for each spectral band by merely changing the distance between the two lenses.

Conference Presentation

Citation Download Citation

Michelle C. Rocha and Alexander V. Goncharov "A quasi-aplanatic refractive pair for correcting astigmatism in Ritchey-Chrétien telescopes", Proc. SPIE 11871, Optical Design and Engineering VIII, 1187108 (12 September 2021); https://doi.org/10.1117/12.2596028

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