Patents by Inventor Yoji Kubota

Yoji Kubota has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • IMAGING LENS
    Publication number: 20190377162
    Abstract: An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The sixth lens is formed in a shape so that a surface thereof on the image plane side and a surface thereof on the object side have positive curvature radii near an optical axis thereof. The seventh lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius near an optical axis thereof. The seventh lens is formed in the shape so that the surface thereof on the image plane side is aspheric. The fourth lens has a specific focal length.
    Type: Application
    Filed: August 26, 2019
    Publication date: December 12, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190377163
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens having negative refractive power, arranged in this order from an object side to an image plane side. The seventh lens is formed in a meniscus shape near an optical axis thereof. The fourth lens has a specific focal length.
    Type: Application
    Filed: August 26, 2019
    Publication date: December 12, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190361198
    Abstract: An imaging lens includes a first lens; a second lens; a third lens having positive refractive power; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The second lens has a convex surface facing the object side near an optical axis thereof. The sixth lens has a convex surface facing the image plane side near an optical axis thereof. The first lens is arranged so that a surface thereof on the object side is away from an image plane by a specific distance on an optical axis thereof. The second lens is arranged to be away from the third lens by a specific distance on the optical axis thereof. The fourth lens is arranged to be away from the fifth lens by a specific distance on an optical axis thereof.
    Type: Application
    Filed: August 9, 2019
    Publication date: November 28, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190361197
    Abstract: An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The second lens has a convex surface facing the object side near an optical axis thereof. The fifth lens has a convex surface facing the image plane side near an optical axis thereof. The sixth lens has a convex surface facing the image plane side near an optical axis thereof. The first lens is arranged so that a surface thereof on the object side is away from an image plane by a specific distance on an optical axis thereof. The second lens is arranged to be away from the third lens by a specific distance on the optical axis thereof. The third lens has a specific Abbe's number.
    Type: Application
    Filed: August 9, 2019
    Publication date: November 28, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • Imaging lens
    Patent number: 10488626
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens, and a third lens. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens having negative refractive power. The fourth lens has a convex surface facing the image plane side near an optical axis thereof. The fifth lens has a convex surface facing the object side near an optical axis thereof. The fifth lens has refractive power weaker than those of the fourth lens and the sixth lens. The fourth lens has a specific Abbe's number and the sixth lens has a specific focal length.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: November 26, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • Imaging lens
    Patent number: 10488629
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are arranged respectively with a space in between. The fifth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The seventh lens is formed in a shape so that a surface thereof on the image plane side and a surface thereof on the object side are aspheric.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: November 26, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • IMAGING LENS
    Publication number: 20190353876
    Abstract: An imaging lens includes a first lens group having positive refractive power and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens. The second lens group includes a fourth lens having positive refractive power, a fifth lens, and a sixth lens. The third lens has a concave surface facing the image plane side near an optical axis thereof. The fifth lens has a concave surface facing the image plane side near an optical axis thereof. The sixth lens has a concave surface facing the object side near an optical axis thereof. The second lens has a specific Abbe's number.
    Type: Application
    Filed: July 30, 2019
    Publication date: November 21, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190353875
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens. The second lens group includes a fourth lens, a fifth lens, and a sixth lens. The second lens has a convex surface facing the image plane side near an optical axis thereof. The fifth lens has a concave surface facing the image plane side near an optical axis thereof. The sixth lens has a concave surface facing the object side near an optical axis thereof. The fifth lens has refractive power weaker than those of the fourth lens and the sixth lens. The second lens has a specific Abbe's number.
    Type: Application
    Filed: July 30, 2019
    Publication date: November 21, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • Imaging lens
    Patent number: 10481364
    Abstract: An imaging lens includes a first lens group; a second lens group; and a third lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens. The second lens group includes a fourth lens having positive refractive power and a fifth lens. The third lens group includes a sixth lens having negative refractive power and a seventh lens having negative refractive power. The first lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The sixth lens has a specific focal length. The seventh lens has a specific focal length and a specific Abbe's number.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: November 19, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • IMAGING LENS
    Publication number: 20190346667
    Abstract: An imaging lens includes a first lens group and a second lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens. The second lens group includes a fourth lens having positive refractive power, a fifth lens, and a sixth lens. The second lens has a concave surface facing the object side near an optical axis thereof. The third lens has a concave surface facing the image plane side near an optical axis thereof. The sixth lens has a concave surface facing the object side near an optical axis thereof. The fourth lens has a specific Abbe's number.
    Type: Application
    Filed: July 30, 2019
    Publication date: November 14, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190346666
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens having negative refractive power. The second lens group includes a fourth lens having positive refractive power, a fifth lens, and a sixth lens. The first lens has a convex surface facing the image plane side near an optical axis thereof. The third lens has a concave surface facing the image plane side near an optical axis thereof. The fourth lens has a convex surface facing the image plane side near an optical axis thereof. The fourth lens has a specific Abbe's number.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 14, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190346665
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens having negative refractive power. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens having negative refractive power. The fourth lens has a specific Abbe's number. The fifth lens has a specific Abbe's number.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 14, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • Imaging lens
    Patent number: 10473891
    Abstract: An imaging lens includes a first lens group; a second lens group; and a third lens group, arranged in this order from an object side. The first lens group includes a first lens having positive refractive power, a second lens, and a third lens with a space in between. The second lens group includes a fourth lens having negative refractive power and a fifth lens with a space in between. The third lens group includes a sixth lens having negative refractive power and a seventh lens with a space in between. A surface of the second lens on the object side has a positive curvature radius. A surface of each of the third lens and the sixth lens on the image plane side has a positive curvature radius. A surface of the fourth lens on the object side has a negative curvature radius. The first lens has a specific Abbe's number.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: November 12, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Imaging lens
    Patent number: 10466441
    Abstract: An imaging lens includes a first lens group; a second lens group having positive refractive power; and a third lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens, and a third lens. The second lens group includes a fourth lens and a fifth lens. The third lens group includes a sixth lens having negative refractive power and a seventh lens having negative refractive power. Each of the first lens and the second lens is formed in a shape so that a surface thereof on the object side has a positive curvature radius. The seventh lens is formed in a shape so that a surface thereof on the object side has a negative curvature radius, and has a specific Abbe's number.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: November 5, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Imaging lens
    Patent number: 10466448
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens having positive refractive power; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The sixth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The seventh lens is formed in a shape so that a surface thereof on the image plane side and a surface thereof on the object side are aspheric. The imaging lens has a specific angle of view.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: November 5, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • IMAGING LENS
    Publication number: 20190317302
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens having negative refractive power. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens. The third lens has a concave surface facing the image plane side near an optical axis thereof. The fourth lens has a specific Abbe's number. The fifth lens has a specific Abbe's number.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190317304
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens, and a third lens. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens. The third lens has a concave surface facing the image plane side near an optical axis thereof. The fourth lens has a convex surface facing the image plane side near an optical axis thereof. The sixth lens has a concave surface facing the object side near an optical axis thereof. The fourth lens has a specific Abbe's number. The fifth lens has a specific Abbe's number.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • Imaging lens
    Patent number: RE47699
    Abstract: An imaging lens includes an aperture stop, a positive first lens with a biconvex shape, a negative second lens; a negative third lens, a positive fourth lens, and a negative fifth lens arranged in this order from an object side. When the whole lens system has a focal length f, focal lengths and Abbe's numbers of the first and the second lenses are f1, ?d1, f2, and ?d2, focal lengths of the fourth and fifth lenses are f4 and f5, a composite focal length of the first lens L1 and the second lens L2 is f12, and a distance from a surface of the first lens L1 on the object side to a surface of the fifth lens L5 on the image side is ?d, the imaging lens satisfies the following conditional expressions: 0.7<f12/f<1.4 0.2<|f1/f2|<0.6 15<?d1??d2 0.4<f4/f<1.0 ?d/f<1.2 |f5/f|<1.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: November 5, 2019
    Assignee: KANTATSU CO., LTD.
    Inventor: Yoji Kubota
  • Imaging lens
    Patent number: RE47700
    Abstract: An imaging lens includes an aperture stop, a positive first lens with a biconvex shape, a negative second lens; a negative third lens, a positive fourth lens, and a negative fifth lens arranged in this order from an object side. When the whole lens system has a focal length f, focal lengths and Abbe's numbers of the first and the second lenses are f1, ?d1, f2, and ?d2, focal lengths of the fourth and fifth lenses are f4 and f5, a composite focal length of the first lens L1 and the second lens L2 is f12, and a distance from a surface of the first lens L1 on the object side to a surface of the fifth lens L5 on the image side is ?d, the imaging lens satisfies the following conditional expressions: 0.7<f12/f<1.4 0.2<|f1/f2|<0.6 15<?d1??d2 0.4<f4/f<1.0 ?d/f<1.2 |f5/f|<1.0.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: November 5, 2019
    Assignee: KANTATSU CO., LTD.
    Inventor: Yoji Kubota
  • Imaging lens
    Patent number: RE47791
    Abstract: An imaging lens includes an aperture stop, a positive first lens with a biconvex shape, a negative second lens; a negative third lens, a positive fourth lens, and a negative fifth lens arranged in this order from an object side. When the whole lens system has a focal length f, focal lengths and Abbe's numbers of the first and the second lenses are f1, ?d1, f2, and ?d2, focal lengths of the fourth and fifth lenses are f4 and f5, a composite focal length of the first lens L1 and the second lens L2 is f12, and a distance from a surface of the first lens L1 on the object side to a surface of the fifth lens L5 on the image side is ?d, the imaging lens satisfies the following conditional expressions: 0.7<f12/f<1.4 0.2<|f1/f2|<0.6 15<?d1??d2 0.4<f4/f<1.0 ?d/f<1.2 |f5/f|<1.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: December 31, 2019
    Assignee: KANTATSU CO., LTD.
    Inventor: Yoji Kubota