Zoom lens

Details Zoom lens Zoom lens

1995-04-17

1997-02-18

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359686, G02B 1514

Patent

active

056046375

ABSTRACT:
A zoom lens particularly usable in a color printer includes a first movable negative unit, a second movable positive unit and a third fixed unit. The third fixed unit has a single meniscus lens component having front and rear surfaces with a curvature within eight percent of each other. Preferably, the second movable positive unit includes a negative element having an Abbe V number between 41 and 47, which is part of a cemented triplet having Abbe V numbers higher than that of the negative element.

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patent: 5313328 (1994-05-01), Aoki
patent: 5481405 (1996-01-01), Simbal

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