Design of a wide-angle fast optical system with anamorphic mirrors

Takayuki Nakano; Yasuhisa Tamagawa

doi:10.1117/12.486440

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23 December 2002 Design of a wide-angle fast optical system with anamorphic mirrors

Takayuki Nakano, Yasuhisa Tamagawa

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Proceedings Volume 4832, International Optical Design Conference 2002; (2002) https://doi.org/10.1117/12.486440
Event: International Optical Design Conference 2002, 2002, Tucson, AZ, United States

Abstract

All-reflective systems have been applied to optical systems because of less material limitations compared with refractive systems. The key to design an all-reflective system is how to widen the field view and the aperture without obscurations of the rays by the mirrors. In order to avoid the obscurations, many systems have been designed to work off-axis with respect to the field angle, which show rotational asymmetry around the optical axis. In this paper, we propose a design method adapted effectively to this asymmetry by use of anamorphic mirrors and an elliptic aperture. In our method two main design factors, placement of mirrors and enlargement of the aperture, are separately optimized. We show a design example of a three-mirror system reaching an F-number of 1.2 with 18×14 degrees field angle.

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Takayuki Nakano and Yasuhisa Tamagawa "Design of a wide-angle fast optical system with anamorphic mirrors", Proc. SPIE 4832, International Optical Design Conference 2002, (23 December 2002); https://doi.org/10.1117/12.486440

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