Optical: systems and elements – Lens – With reflecting element
Patent
1994-01-31
1995-11-28
Ben, Loha
Optical: systems and elements
Lens
With reflecting element
359364, 359366, 359727, G02B 1700, G02B 2100
Patent
active
054713463
ABSTRACT:
To develop a design form for a Cassegrain-type telescope with spherical primary and secondary mirrors, which is well-corrected for chromatic aberration as well as for geometrical aberrations including spherical aberration, coma and astigmatism, the designer begins with a "starting design form" for a conventional Cassegrain-type telescope with spherical primary and secondary mirrors, and then modifies the "starting design form" by:
REFERENCES:
patent: 3438695 (1969-04-01), Matsui
patent: 3515461 (1970-06-01), Casas et al.
patent: 3700310 (1972-10-01), Rayces
patent: 3711184 (1973-01-01), Amon et al.
patent: 3811749 (1974-05-01), Abel
patent: 4714307 (1987-12-01), Palmer
Johathan Maxwell, Catadioptric Imaging Systems, "FIG. 30", p. 58 (1972).
Ben Loha
Lockheed Missiles & Space Co., Inc.
Morrissey John J.
Nguyen Thong
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