Zoom lens

Details Zoom lens Zoom lens

1991-12-24

1993-09-07

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

052434664

ABSTRACT:
A lens system comprising a positive power lens assembly and a negative power lens assembly, in which the positive power lens assembly includes a cemented doublet and a two-surface aspheric lens. The present invention discloses a zoom lens with a 2.57.times.zoom ratio.

REFERENCES:
patent: 4838669 (1989-06-01), Ogata et al.
patent: 5109299 (1992-04-01), Kato

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