Title:
【発明の名称】全長の短いズームレンズ
Document Type and Number:
Japanese Patent JP3072533
Kind Code:
B2
Abstract:
A zoom lens system comprising at least a first lens unit having a positive refractive power as a whole, a second lens unit having a negative refractive power as a whole and a third lens unit having a positive refractive power as a whole, and adapted to perform variation of focal length by varying at least two airspaces reserved between said lens units. This zoom lens system consists of a small number of lens elements, has a short total length and a compact external design, and is light in weight.
Inventors:
Juro Kikuchi
Application Number:
JP13705091A
Publication Date:
July 31, 2000
Filing Date:
May 14, 1991
Export Citation:
Assignee:
Olympus Optical Co., Ltd.
International Classes:
G02B9/00; G02B15/16; G02B15/173; H04N5/225; (IPC1-7): G02B15/16; G02B9/00; H04N5/225
Domestic Patent References:
| JP197913A | ||||
| JP61138913A | ||||
| JP61249016A | ||||
| JP1246517A |
Attorney, Agent or Firm:
Kanji Mukai