Title:
ズームレンズ系、レンズ鏡筒、撮像装置及びカメラ
Document Type and Number:
Japanese Patent JP4822512
Kind Code:
B2
Abstract:
A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units is changed so that an optical image is formed with a continuously variable magnification, the zoom lens system comprises a first lens unit having positive power, a second lens unit that includes a lens element having a reflecting surface and has negative power and subsequent lens units including at least one lens unit having positive power, and the condition: 0.50<(C−S)/H<1.00(C=√(2R·dR−dR2), S is a sag of the image side surface of the most object side lens element in the second lens unit at height H, H is one-half of an optical axial thickness of the lens element having a reflecting surface, R is a radius of curvature of the image side surface, and dR is an interval between the most object side lens element and the lens element having a reflecting surface) is satisfied.
Inventors:
Yoshitsugu Keiki
Kyoichi Mito
Kyoichi Mito
Application Number:
JP2006035391A
Publication Date:
November 24, 2011
Filing Date:
February 13, 2006
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G02B15/20; G02B13/18; G02B17/08; G03B5/00; G03B17/04; G03B17/17; H04N5/225
Domestic Patent References:
| JP2004102089A | ||||
| JP2002303791A | ||||
| JP2005266173A | ||||
| JP2003043354A | ||||
| JP2004004533A | ||||
| JP2005017915A |
Attorney, Agent or Firm:
Patent business corporation Ogasawara patent office
Shiro Ogasawara
Kaoru Kuwahara
Shiro Ogasawara
Kaoru Kuwahara