Zoom lens having a large zoom ratio

Details Zoom lens having a large zoom ratio Zoom lens having a large zoom ratio

1983-03-03

1987-09-29

Corbin, John K.

350423, G02B 1520

Patent

active

046965530

ABSTRACT:
A zoom lens having at least four components of which the 1st counting from the object side is of positive power, the 2nd is of negative power and the 3rd and 4th are of positive or negative power, wherein the 2nd component is made fixed, and the 1st component and at least one of those that follow the 2nd component are made movable for zooming, whereby the bulk and size of the lens system is minimized, while still permitting good correction of aberrations.

REFERENCES:
patent: 4232942 (1980-11-01), Ikemori
patent: 4377325 (1983-03-01), Hiroshi et al.
patent: 4451124 (1984-05-01), Basista et al.
patent: 4494828 (1985-01-01), Masumoto et al.
patent: 4501475 (1985-02-01), Fujita et al.
patent: 4506958 (1985-03-01), Imai
patent: 4515446 (1985-05-01), Takahashi et al.

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