Zoom lens

Details Zoom lens Zoom lens

1981-07-08

1983-08-23

Corbin, John K.

350432, G02B 304, G02B 1514

Patent

active

044000642

ABSTRACT:
A zoom lens comprising, from front to rear, a first lens group of negative power, and a second lens group of positive power with the axial air separation therebetween being variable to effect zooming. The first lens group includes at least one negative lens element and one positive lens element, and the negative lens element has its one surface configured to an aspheric shape, and is made of a plastic material. The bulk and size of the lens system is minimized even though the aberrations are well corrected.

REFERENCES:
patent: 4153339 (1979-05-01), Tajima et al.
patent: 4159865 (1979-07-01), Kawamura et al.
patent: 4240701 (1980-12-01), Lytle

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