Title:
IMAGING LENS
Document Type and Number:
WIPO Patent Application WO/2017/195503
Kind Code:
A1
Abstract:
The purpose of the present invention is to more effectively correct various aberrations due to a sixth lens, and further shorten the entire optical length. A first lens (L1) has a positive refractive power, and a fifth lens (L5) and a sixth lens (L6) have a negative refractive power. The first lens (L1) has a object-side surface (L1F) having a convex shape. Each of a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5) has a non-spherical surface formed at least either on the object-side surface or on an image-side surface. The sixth lens (L6) has a concave and non-spherical object-side surface (L6F). The image-side surface (L6R) of the sixth lens (L6) is formed such that the entire region corresponding to the effective diameter thereof is optically flat.
Inventors:
SHIGEMITSU NORIMICHI
ISHIZUE YOSHIHITO
FUKAYA HISAO (JP)
YAMAZAKI KAORU (JP)
YUZA SHINGO (JP)
ISHIZUE YOSHIHITO
FUKAYA HISAO (JP)
YAMAZAKI KAORU (JP)
YUZA SHINGO (JP)
Application Number:
PCT/JP2017/014094
Publication Date:
November 16, 2017
Filing Date:
April 04, 2017
Export Citation:
Assignee:
SHARP KK (JP)
KANTATSU CO LTD (JP)
KANTATSU CO LTD (JP)
International Classes:
G02B13/00; G02B13/18
Foreign References:
| JP2013182090A | 2013-09-12 | |||
| US20140098239A1 | 2014-04-10 | |||
| JPH01188814A | 1989-07-28 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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