Compact zoom lens

Details Compact zoom lens Compact zoom lens

1996-01-02

1997-04-01

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359713, G02B 1514, G02B 302

Patent

active

056172540

ABSTRACT:
A compact zoom lens performs a zooming operation by changing a clearance between a first lens group having a positive focal length and a second lens group having a negative focal length. The first lens group is constructed by sequentially arranging first to fourth lenses from an object side. The second lens group is constructed by sequentially arranging fifth and sixth lenses from an object side. An aperture stop is arranged just after the first lens group. The following conditions

REFERENCES:
patent: 4836660 (1989-06-01), Ito
patent: 5398135 (1995-03-01), Ohashi
patent: 5459616 (1995-10-01), Kawamura et al.

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