Catadioptric telephoto lens

Details Catadioptric telephoto lens Catadioptric telephoto lens

1985-02-26

1987-05-19

Corbin, John K.

G02B 1708

Patent

active

046662596

ABSTRACT:
A catadioptric telephoto lens comprises, in the order of processing of light from the object side, a biconvex positive lens component, a first reflecting member, a second reflecting member and a negative lens group. The first reflecting member has a refracting surface concave to the object side and a rear reflecting surface also concave to the object side and is capable of reflecting and converging the light. The second reflecting member is positioned close to and at the image side of said biconvex positive lens component and has a refracting surface convex to the image side and a rear reflecting surface also convex to the image side and is capable of reflecting and diverging the light. The negative lens group is positioned close to said first reflecting member and has at least a positive lens and a negative lens with a synthesized negative refractive power.

REFERENCES:
patent: 3632190 (1972-01-01), Shimizu
patent: 4188091 (1980-02-01), Fujii
patent: 4264136 (1981-04-01), Ogino

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