Optical: systems and elements – Mirror – Plural mirrors or reflecting surfaces
Patent
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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