Zoom lens system

Details Zoom lens system Zoom lens system

1998-10-13

2000-03-14

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

060380845

ABSTRACT:
A zoom lens system has at least three lens units of, from the most object side, a first lens unit having a negative optical power, a second lens unit having a positive optical power and a third lens unit, wherein the distances between the lens units are varied by moving all of the lens units during zooming. The zoom lens system satisfies the predetermined mathematical condition.

REFERENCES:
patent: 4687302 (1987-08-01), Ikemori et al.
patent: 4824223 (1989-04-01), Docter et al.
patent: 5009491 (1991-04-01), Hata
patent: 5132848 (1992-07-01), Nishio et al.
patent: 5455714 (1995-10-01), Kohno
patent: 5539582 (1996-07-01), Kohno et al.

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