Ultrasmall size zoom lens

Details Ultrasmall size zoom lens Ultrasmall size zoom lens

1985-02-07

1987-07-28

Corbin, John K.

350426, G02B 964, G02B 1514

Patent

active

046828605

ABSTRACT:
An ultrasmall size zoom lens comprising two lens groups of which the first has a positive refractive power and the second has a negative refractive power, the first lens group including at least two positive lenses and at least one negative lens, the second group including at least one positive lens and at least one negative lens, and the axial air separation between the first and the second lens groups being variable to effect zooming.

REFERENCES:
patent: 2752821 (1956-07-01), Cook
patent: 4155629 (1979-05-01), Nakamura
patent: 4323302 (1982-04-01), Kimura
Jenkins et al, Fundamentals of Optics, 3rd Ed., pp. 144-145.

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