Catadioptic telescope

Patent

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G02B 1708

Patent

active

040436438

ABSTRACT:
A Cassegrain telescope with spherical primary and secondary mirrors and a corrector plate located between the focal point and the center of the radius of curvature of the primary mirror. The secondary mirror is located between the focal point and the vertex of the primary mirror and the image surface is beyond or behind the vertex of the primary mirror.

REFERENCES:
patent: 3049054 (1962-08-01), Waland
Sigler; "A Family of Compact Schmidt-Cassegrain Telescope Designs," Applied Optics, vol. 13, No. 8.

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