Zoom lens

Details Zoom lens Zoom lens

1986-09-04

1987-08-18

Corbin, John K.

G02B 1514

Patent

active

046873023

ABSTRACT:
A zoom lens comprising, from front to rear, a negative first component, a positive second component, a positive or negative third component and a positive fourth component. To effect zooming, the first, second and third components are made to axially move in differential relation to each other. This makes it possible to achieve a minimization of the bulk and size of the entire system and a valuable increase in the angle of view field for the wide angle setting.

REFERENCES:
patent: 3975089 (1976-08-01), Betensky
patent: 4306776 (1981-12-01), Someya

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