Zoom lens

Details Zoom lens Zoom lens

1998-06-19

1999-11-30

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

059952989

ABSTRACT:
An inexpensive, compact, high performance zoom lens which has excellent production adaptability is disclosed. The zoom lens has a front lens group of positive refractive power which includes a negative lens element having a concave aspheric surface on the object-side, and a positive lens element having a convex surface on the image-side. The rear lens group consists of a negative lens element. A stop is arranged between the negative lens element and the positive lens element in the front lens group, and the following conditional formulas (1)-(3) are satisfied:

REFERENCES:
patent: 4991945 (1991-02-01), Estelle
patent: 5270861 (1993-12-01), Estelle

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