Title:
IMAGING LENS SYSTEM AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/066641
Kind Code:
A1
Abstract:
The present invention provides an imaging lens system having a wide angle of view, and having good imaging forming performance and telecentricity. An imaging lens system (11) comprises, in order from the object side: a first lens (L1) having a concave shape on the image side and negative power; a second lens (L2)having a concave shape on the image side and negative power; a third lens (L3) having a convex shape on the object side and positive power; a fourth lens (L4) having a concave shape on the image side and negative power; a fifth lens (L5) having a convex shape on the object side and positive power; and a sixth lens (L6) having a convex shape on the image side and positive power, wherein an image-side lens surface (S10) of the fourth lens (L4) and an object-side lens surface (S11) of the fifth lens (L5) are cemented, and the imaging lens system satisfies 1.5 < f6/f < 2.5 where f6 is the focal length of the sixth lens (L6) and f is the focal length of the entire lens system.
Inventors:
SUGI YASUYUKI (JP)
SHIMOEDA YUKIHIRO (JP)
SUGIYAMA TAKASHI (JP)
SHIMOEDA YUKIHIRO (JP)
SUGIYAMA TAKASHI (JP)
Application Number:
PCT/JP2017/036255
Publication Date:
April 12, 2018
Filing Date:
October 05, 2017
Export Citation:
Assignee:
MAXELL LTD (JP)
International Classes:
G02B13/04; G02B13/18
Foreign References:
| JP2000352665A | 2000-12-19 | |||
| JPH11249009A | 1999-09-17 | |||
| JP2005221920A | 2005-08-18 | |||
| JP2010197604A | 2010-09-09 | |||
| JP2007233152A | 2007-09-13 | |||
| JP2009042377A | 2009-02-26 | |||
| JP2008040033A | 2008-02-21 | |||
| JP2009136387A | 2009-06-25 | |||
| JP2010246906A | 2010-11-04 | |||
| JP2015060201A | 2015-03-30 | |||
| JP2016188893A | 2016-11-04 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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