Wide angle zoom lens system

Details Wide angle zoom lens system Wide angle zoom lens system

1977-05-04

1979-05-22

Clark, Conrad J.

G02B 1516

Patent

active

041556291

ABSTRACT:
In a wide angle zoom lens system which comprises a diverging lens group and a converging lens group in order from the object side and in which both of the groups are movable on the optical axis of the lens system to vary the air space between the two groups so that the magnification of the image is variable while the image plane is being maintained at a fixed position, the diverging lens group comprises, in order from the object side, a negative meniscus lens component convex to the object side, a negative meniscus lens component convex to the object side, and a positive meniscus lens component convex to the object side, and the converging lens group comprises at least four positive lens components which are separate from one another, a positive lens component being closest to the object side, a positive lens compartment being closest to the image and a negative lens component disposed among the at least four positive lens components.

REFERENCES:
patent: 4074931 (1978-02-01), Okudaira

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