Zoom lens

Details Zoom lens Zoom lens

1987-02-12

1988-06-21

Corbin, John K.

350423, G02B 964, G02B 1312

Patent

active

047521210

ABSTRACT:
A zoom lens having at least three components, or, from front to rear, a first component of positive refractive power, a second component for variation of the image magnification, and a third component for image shift compensation, wherein said first lens component is constructed from a front group of lens elements l.sub.A of positive refractive power and a rear group of lens elements l.sub.B of negative refractive power, thereby letting f.sub.A and f.sub.B denote the focal lengths of said front and rear lens groups respectively, the following condition is satisfied:

REFERENCES:
patent: 2741947 (1956-04-01), Back
patent: 3682534 (1972-08-01), Cook et al.
patent: 3924934 (1975-12-01), Grey
patent: 3970366 (1976-06-01), Sekiguchi
patent: 4460251 (1984-07-01), Okudaira

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