Title:
IMAGING LENS AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/155464
Kind Code:
A1
Abstract:
[Problem] To achieve a more compact, lower-cost, wider-angle, improved-performance imaging lens which further ensures back focus. [Solution] In order from the object side, this imaging lens (1) consists of a negative first lens (L1), a positive second lens (L2), a negative third lens (L3), a positive fourth lens (L4), a positive fifth lens (L5) and a negative sixth lens (L6). Defining the radius of curvature of the object-side surface of the third lens (L3) as R3F, the radius of curvature of the image-side surface of the third lens (L3) as R3R, and the Abbe number of the material of the third lens (L3) with respect to the d-line as νd3, the following conditional expressions are satisfied.
1.35 < (R3F+R3R)/(R3F-R3R) < 6.0 ... (1)
νd3 < 30.0 ... (2)
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Inventors:
ASAMI TARO (JP)
Application Number:
PCT/JP2013/007608
Publication Date:
October 02, 2014
Filing Date:
December 26, 2013
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B13/04; G02B13/18
Foreign References:
| JPS6472112A | 1989-03-17 | |||
| JPH11142730A | 1999-05-28 | |||
| JP2006039259A | 2006-02-09 | |||
| JPH07311339A | 1995-11-28 | |||
| JPH0921952A | 1997-01-21 | |||
| JPH09152549A | 1997-06-10 | |||
| JP2011075646A | 2011-04-14 | |||
| JP2008116688A | 2008-05-22 | |||
| JPH11160618A | 1999-06-18 | |||
| JP2005164839A | 2005-06-23 | |||
| JP2006343554A | 2006-12-21 | |||
| JP2009109630A | 2009-05-21 |
Attorney, Agent or Firm:
YANAGIDA, Masashi et al. (JP)
Seiji Yanagida (JP)
Seiji Yanagida (JP)
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