Zoom lens system

Details Zoom lens system Zoom lens system

1993-01-07

1995-10-31

Look, Edward K.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

054634997

ABSTRACT:
A zoom lens system for use with compact cameras which is compact and yet effectively corrects chromatic aberrations, includes, in order from the object side, a first lens group having a positive focal length and a second lens group having a negative focal length, the inter-group distance being varied to perform zooming. The first lens group includes, in order from the object side, a first subgroup having a small power and a second subgroup having a large positive power. At least one of the subgroups is a cemented lens having a divergent surface, with an aspheric surface being provided in the first subgroup. The first lens group satisfies the following conditions

REFERENCES:
patent: 4099846 (1978-07-01), Kawamura et al.
patent: 4906077 (1990-03-01), Ito
patent: 4909613 (1990-03-01), Kikuchi
patent: 4936661 (1990-06-01), Betensky et al.
patent: 5071235 (1991-12-01), Mori et al.
patent: 5270867 (1993-12-01), Estelle
French Search Report FR 9300275.
English Abstract of Japanese Patent 63-311224.
Great Britain Search Report GB 9300381.2 dated Mar. 11, 1993.

Affiliated with

Also associated with

Rating

Zoom lens system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zoom lens system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1777896