27 July 2016 Analysis of the three-mirror systems for survey telescopes
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Proceedings Volume 9906, Ground-based and Airborne Telescopes VI; 99062N (2016); doi: 10.1117/12.2231956
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom
Abstract
Normally, telescope systems applied for astronomic purposes have rather narrow field. Survey telescopes which are the systems with angular field up to several degrees are applied in several spheres not only for astronomic purposes but also for weather observing, comets and asteroids detecting (asteroid and comet threats or ACT). Systems with relatively small diameters (below 1.5m) are of interest both for ground-based and space instruments. As a rule, such systems should be fast (up to F/3 … F/1.5 and faster). Therefore, the most part of survey telescopes are reflective systems with additional lens correctors. Lens elements in these instruments can lead to some difficulties because the possibility of manufacturing large size lens correctors of the optimal glass sort is not always exist. So, from that point mirror systems can provide more advantages. Mirror systems are also of great interest due to the wide spectrum range used for operation. However, the design of the mirror system that can give both sufficient f-number and large angular field is the complicated and complex task, first of all because of difficulty during the choosing the initial principal scheme. Using the expressions based on the third-order aberration theory several system of survey telescopes were chosen which can provide the needed characteristics. The examples of the schemes are given, including their optical characteristics.
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K. D. Butylkina, G. E. Romanova, A. V. Bakholdin, "Analysis of the three-mirror systems for survey telescopes", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99062N (27 July 2016); doi: 10.1117/12.2231956; http://dx.doi.org/10.1117/12.2231956
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KEYWORDS
Mirrors

Telescopes

Space telescopes

Monochromatic aberrations

Modulation transfer functions

Stray light

Objectives

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