Title:
ZOOM LENS AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/175722
Kind Code:
A1
Abstract:
[Problem] To provide a compact zoom lens which is optimal for an interchangeable lens for a mirror-less camera. [Solution] A zoom lens comprising, in order from the object side, a first lens group (G1) which has negative refractive power and moves during changes in magnification, a second lens group (G2) which has positive refractive power and moves during changes in magnification, and a third lens group (G3) which has positive refractive power and is fixed during changes in magnification, wherein: the first lens group (G1) comprises, in order from the object side, a negative lens (L11) having a concave surface on the image side, a negative lens (L12) having a concave surface on the image side, and a positive lens (L13) having a convex surface on the object side; the second lens group (G2) comprises, in order from the object side, a diaphragm (St), a positive lens (L21) having a convex surface on the object side, a cemented lens comprising, in order from the object side, a positive lens (L22) having a convex surface on the object side and a negative lens (L23) having a concave surface on the image side, the cemented lens having positive refractive power as a whole, and a negative lens (L24) having a convex surface on the image side and having at least one non-spherical surface; and the third lens group comprises a positive lens (L31).
Inventors:
ORI TETSUYA (JP)
Application Number:
PCT/JP2013/003005
Publication Date:
November 28, 2013
Filing Date:
May 10, 2013
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B15/163; G02B13/18
Domestic Patent References:
| WO2012066735A1 | 2012-05-24 | |||
| WO2002082158A1 | 2002-10-17 |
Foreign References:
| JP2002072091A | 2002-03-12 | |||
| JP2004309951A | 2004-11-04 | |||
| JP2009265171A | 2009-11-12 | |||
| JP2012083706A | 2012-04-26 | |||
| JP2010039016A | 2010-02-18 | |||
| JP2006113554A | 2006-04-27 | |||
| JPH0921950A | 1997-01-21 |
Attorney, Agent or Firm:
YANAGIDA, Masashi et al. (JP)
Seiji Yanagida (JP)
Seiji Yanagida (JP)
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