Title:
ZOOM LENS AND OPTICAL EQUIPMENT HAVING THE SAME
Document Type and Number:
Japanese Patent JP3919580
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a zoom lens realizing the stabilization of a photographic image by optically correcting a blurring of the photographic image when the lens is vibrated (tilted) and obtaining a still picture, and optical equipment having the zoom lens.
SOLUTION: The zoom lens has a 1st lens group having positive refractive power, a 2nd lens group provided with a variable power function and having negative refractive power, a 3rd lens group having positive refractive power, and a 4th lens group correcting an image surface fluctuated by variable power and provided with a focusing function and having positive refractive power in order from an object side. The lens constitution of each lens group is appropriately set, and the entire 3rd lens group is moved in a direction perpendicular to an optical axis, so as to correct a blurring of the image.
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Inventors:
Norihiro Namba
Hiroyuki Hamano
Hiroyuki Hamano
Application Number:
JP2002102764A
Publication Date:
May 30, 2007
Filing Date:
April 04, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/02; G02B15/16; G02B7/04; G02B7/10; G02B13/18; G02B15/173; G02B27/64; G03B5/00; H04N5/225; (IPC1-7): G02B15/16; G02B7/02; G02B7/04; G02B7/10; G02B13/18; G03B5/00; H04N5/225
Domestic Patent References:
| JP2001042213A | ||||
| JP2000321494A |
Attorney, Agent or Firm:
Yukio Takanashi