Unobstructed all-reflecting telescopes of the Schiefspiegler typ

Details Unobstructed all-reflecting telescopes of the Schiefspiegler typ Unobstructed all-reflecting telescopes of the Schiefspiegler typ

1990-12-03

1992-08-25

Henry, Jon W.

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

G02B 1706

Patent

active

051424177

ABSTRACT:
An unobstructed four-mirror telescope having tilted components for astronomical observations. Favorite focal ratios are in the range of about F/12 to F/20 and all surfaces are rotationally symmetric. The systems off improved aberration correction and it is possible in special cases:

REFERENCES:
patent: 4265510 (1981-05-01), Cook
patent: 4632521 (1986-12-01), Kovsch
patent: 4737021 (1988-04-01), Kovsch
patent: 4804258 (1989-02-01), Kebo
patent: 4964706 (1990-10-01), Cook
patent: 4993818 (1991-02-01), Cook
patent: 5009494 (1991-04-01), Iossi et al.

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