Title:
ZOOM LENS AND IMAGING DEVICE
Document Type and Number:
Japanese Patent JP2015118214
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a zoom lens that is inexpensive and small in size and has high imaging performance and a wide-angle high variable magnification ratio, and an imaging device including the zoom lens.SOLUTION: The zoom lens includes, successively from an object side, a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, a third lens group G3 having a positive refractive power, and a lens group P having a positive refractive power on an image side of the third lens group G2, and satisfies conditional expressions (1):1.3<βrw<-0.80, (2):-0.21<β2w/tanθw<-0.12, and (3):0.55
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Inventors:
IWAZAWA YOSHITO
YI TAE-YONG
YI TAE-YONG
Application Number:
JP2013260998A
Publication Date:
June 25, 2015
Filing Date:
December 18, 2013
Export Citation:
Assignee:
TAMRON KK
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JPH1164728A | 1999-03-05 | |||
| JP2002365548A | 2002-12-18 | |||
| JP2009009104A | 2009-01-15 | |||
| JP2009042261A | 2009-02-26 | |||
| JP2010217549A | 2010-09-30 | |||
| JP2011145435A | 2011-07-28 | |||
| JP2013182246A | 2013-09-12 | |||
| JPH07151975A | 1995-06-16 |
Foreign References:
| US20080297901A1 | 2008-12-04 | |||
| US20100238563A1 | 2010-09-23 | |||
| US6010537A | 2000-01-04 |
Attorney, Agent or Firm:
Katsuhiro Yoshimura
Hiroko Negishi
Hiroko Negishi