Aplanatic, anastigmatic, and distortion free two-mirror three-reflection system: the quasi-concentric mirror system according to PCT/DE94/00042

Frank Gallert

doi:10.1117/12.269070

21 March 1997 Aplanatic, anastigmatic, and distortion free two-mirror three-reflection system: the quasi-concentric mirror system according to PCT/DE94/00042

Frank Gallert

Author Affiliations +

Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269070
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

Abstract

The invention relates to a mirror system with two mirrors, comprising a concentrating reflector and a diffusing reflector fitted on the same optical axis, an image field and a detector. The diffusing reflector has a central drilling. A diaphragm is arranged in such a way that the point of intersection of the plane of the diaphragm and the optical axis forms the center of the curved image field of the mirror system. At the edge of the diffusing reflector there is a central diffuse light shutter. The concentrating reflector may optionally have a central drilling. The mirror system may be used as a telescope system. Prior art two-mirror systems like the Ritchey-Chretien system do not correct astigmatism, image field curvature and distortion. According to the invention, spherical aberration, coma, astigmatism and distortion are corrected by double reflection from the concentrating reflector and the substantially hyperbolic shaping of both mirrors.

Citation Download Citation

Frank Gallert "Aplanatic, anastigmatic, and distortion free two-mirror three-reflection system: the quasi-concentric mirror system according to PCT/DE94/00042", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269070

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