All-spherical catadioptric system for 0.8m F/4.5 astronomical telescope: Can we compete with the Ritchey-Chrétien design?

Mehdi Baharmi; Alexander V. Goncharov; Christopher Dainty

doi:10.1117/12.868909

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7 September 2010 All-spherical catadioptric system for 0.8m F/4.5 astronomical telescope: Can we compete with the Ritchey-Chrétien design?

Mehdi Baharmi, Alexander V. Goncharov, Christopher Dainty

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Proceedings Volume 7652, International Optical Design Conference 2010; 76520L (2010) https://doi.org/10.1117/12.868909
Event: International Optical Design Conference 2010, 2010, Jackson Hole, WY, United States

Abstract

Aspherical surfaces are difficult to manufacture, therefore we consider a possibility of using only spherical surfaces. Two optical designs for 800-mm F/4.5 seeing limited telescope are considered: Ritchey-Chrétien and a two-mirror Catadioptric system. The Ritchey-Chrétien system has a hyperboloidal primary mirror, a planoid aspheric secondary mirror, and a two-lens field corrector, whereas the all-spherical system contains a Mangin mirror and a meniscus corrector as the secondary group and a three-lens corrector. Our analysis of the image quality achieved in the two designs shows that the all-spherical catadioptric system is an acceptable alternative to the Ritchey-Chrétien design.

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Mehdi Baharmi, Alexander V. Goncharov, and Christopher Dainty "All-spherical catadioptric system for 0.8m F/4.5 astronomical telescope: Can we compete with the Ritchey-Chrétien design?", Proc. SPIE 7652, International Optical Design Conference 2010, 76520L (7 September 2010); https://doi.org/10.1117/12.868909

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