Compact zoom lens system

Details Compact zoom lens system Compact zoom lens system

1989-08-11

1990-10-16

Arnold, Bruce Y.

350423, G02B 1515

Patent

active

049630105

ABSTRACT:
A compact zoom lens system consisting of a small number of lens elements and having a short total length, said zoom lens system comprising a first lens unit having positive refractive power and a second lens unit having negative refractive power which are arranged in the order from the object side, an aperture stop arranged in said first lens unit, at least one lens component arranged after said aperture stop in said first lens unit and at least one graded refractive index lens having refractive index gradient in the direction perpendicular to the optical axis in said first lens unit.

REFERENCES:
patent: 4682860 (1987-07-01), Tanaka et al.
patent: 4720179 (1988-01-01), Ito
patent: 4776679 (1988-10-01), Kitagishi et al.

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