Two group type zoom lens with wide image angle

Details Two group type zoom lens with wide image angle Two group type zoom lens with wide image angle

1980-05-06

1982-05-11

Corbin, John K.

G02B 1514

Patent

active

043290221

ABSTRACT:
The disclosed two-group wide-image-angle zoom lens is zoomed by changing the distance between the front and the rear group. The front group exhibits a negative refracting power and includes a first positive lens, a second negative lens concave toward the image end, a third positive lens, a fourth negative lens concave toward the image end, and a fifth positive image lens convex toward the object end, all in sequence; the rear group is closer to the image end than the front group, exhibits a positive refracting power, and includes a first positive sub-group, a second positive sub-group, a third negative sub-group, and a fourth positive sub-group.

REFERENCES:
patent: 4147410 (1979-04-01), Shimomura et al.
patent: 4190323 (1980-02-01), Ogawa et al.
patent: 4251132 (1981-02-01), Okudaira

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