Study of higher order aberrations of an on-axis three-mirror telescope with an off-axis field of view

Galina E. Romanova; Kseniia D. Butylkina; Vladimir N. Vasilyev

doi:10.1117/12.2561420

13 December 2020 Study of higher order aberrations of an on-axis three-mirror telescope with an off-axis field of view

Galina E. Romanova, Kseniia D. Butylkina, Vladimir N. Vasilyev

Proceedings Volume 11445, Ground-based and Airborne Telescopes VIII; 1144537 (2020) https://doi.org/10.1117/12.2561420
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Currently, numerous projects for the study of both outer space and the Earth's surface use mirror optical systems, since they allow working in a wide spectral range. As a rule, three-mirror anastigmats (TMA) are used, however, it is possible to correct four aberrations in some configurations of three-mirror systems without an intermediate image. In order to avoid obscuration, such schemes in a configuration with an off-axis field may be used. In the case of very compact systems, it is necessary to apply fast mirrors, so aspherical surfaces are used. To select the optimal position of an aspherical surface and an equation for describing higher-order and free-form aspherical surfaces, a study is made of higher-order aberrations in systems with various parameters, empirical dependencies are derived that allow one to evaluate the correction capabilities of the schemes. Examples of system designs with an off-axis field are presented.

Citation Download Citation

Galina E. Romanova, Kseniia D. Butylkina, and Vladimir N. Vasilyev "Study of higher order aberrations of an on-axis three-mirror telescope with an off-axis field of view", Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 1144537 (13 December 2020); https://doi.org/10.1117/12.2561420

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