Zoom lens

Details Zoom lens Zoom lens

1992-10-19

1993-07-13

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359687, G02B 1514

Patent

active

052279197

ABSTRACT:
A zoom lens is disclosed comprising, in the order from a large conjugate side, a first lens unit of positive power, a second lens unit of negative power and a third lens unit of positive power, wherein when zooming from the wide-angle end to the telephoto end, the separation between the first and second lens units increases, the separation between the second and third lens units decreases, and the third lens unit moves toward the large conjugate side, the zoom lens satisfying the following conditions:

REFERENCES:
patent: 4758073 (1988-07-01), Moskovich

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