Zoom lens

Details Zoom lens Zoom lens

1989-09-05

1990-05-29

Sugarman, Scott J.

350427, G02B 1514

Patent

active

049290690

ABSTRACT:
A compact zoom lens provided with a first lens group of a positive refractive power and second lens group of a negative refractive power. The zooming operation can be achieved by varying the air gap between the lens groups. The first lens group comprises, in the order from the object side, a positive meniscus lens component with faces convex to the object side, a biconcave lens component, a biconvex lens component, and a positive lens component. The second lens group comprises, in the order from the object side, a positive meniscus lens component with faces convex to the image side, and a negative meniscus lens component with faces concave to the object side. The zoom lens has a zoom ratio of 1.6 or higher.

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patent: 4682860 (1987-07-01), Tanaka et al.
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patent: 4772106 (1988-09-01), Ogata et al.
patent: 4818081 (1989-04-01), Ito
patent: 4836660 (1989-06-01), Ito
patent: 4838669 (1989-06-01), Ogata et al.
patent: 4854683 (1989-08-01), Ozawa

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