Dioptric lens system

Details Dioptric lens system Dioptric lens system

1994-09-09

1997-09-16

Sugarman, Scott J.

Optical: systems and elements

Lens

Including a nonspherical surface

359356, 359357, 359714, G02B 1318, G02B 1314

Patent

active

056686714

ABSTRACT:
A dioptric lens system comprises a plurality of lenses and a rear diaphragm functioning as an aperture diaphragm. An overall length in the order of the focal distance is obtained by the features that the object side surface of the object side lens comprises an aspherical component and that the intermediate and image side lenses are closely adjacent.

REFERENCES:
patent: 2234707 (1941-03-01), Ott
patent: 3778133 (1973-12-01), Tatian
patent: 4537464 (1985-08-01), Boutellier
patent: 4695119 (1987-09-01), Neil
patent: 4892398 (1990-01-01), Kudo et al.
patent: 5251063 (1993-10-01), Baumann
patent: 5446581 (1995-08-01), Jamieson

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