Patents by Inventor Kenichi Kubota

Kenichi 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
    Patent number: 10598905
    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: Grant
    Filed: July 30, 2019
    Date of Patent: March 24, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • Imaging lens
    Patent number: 10598903
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; 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 is formed so that surfaces have positive paraxial curvature radii. The fourth lens is formed so that a surface on the image plane side has a negative paraxial curvature radius. The sixth lens is formed so that surfaces are aspherical, and the surface on the image plane side has a negative paraxial curvature radius. The first lens is arranged so that a surface on the object side is away from an image plane by a specific distance on an optical axis, and the imaging lens has a specific angle of view so that specific conditional expressions are satisfied.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: March 24, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • Imaging lens
    Patent number: 10571663
    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: Grant
    Filed: August 26, 2019
    Date of Patent: February 25, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Imaging lens
    Patent number: 10571662
    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: Grant
    Filed: August 26, 2019
    Date of Patent: February 25, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Imaging lens
    Patent number: 10558019
    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 imaging lens has a total of seven lenses. The first to seventh lenses are arranged respectively with a space in between. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The third lens is formed in a shape so that a surface on the object side is convex near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side has at least one inflexion point and is concave near an optical axis. The fourth lens and the fifth lens have specific Abbe's numbers.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: February 11, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Imaging lens
    Patent number: 10558020
    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 from an object side to an image plane side. The imaging lens has a total of seven lenses. The first to seventh lenses are arranged respectively with a space in between. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The third lens has a meniscus shape near an optical axis. The fourth lens is formed in a shape so that a surface on the image plane side is convex near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side has one inflexion point and is concave near an optical axis. The fourth lens has a specific Abbe's number.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: February 11, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Imaging lens
    Patent number: 10558021
    Abstract: An imaging lens includes a first lens having at least one aspheric surface; a second lens having at least one aspheric surface; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens having at least one aspheric surface; a sixth lens having two aspheric surfaces; and a seventh lens having two aspheric surfaces, arranged in this order from an object side to an image plane side respectively with a space in between. The imaging lens has a total of seven lenses. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side is concave near the optical axis. The fifth lens and the sixth lens have specific Abbe's numbers.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: February 11, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Imaging lens
    Patent number: 10545318
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens having negative refractive power; a fifth lens; and a sixth lens having negative refractive power, arranged from an object side to an image plane side. The first lens is formed so that a surface on the object side has a positive paraxial curvature radius. The second lens is formed so that a surface on the image plane side has a positive paraxial curvature radius. The sixth lens is formed so that surfaces are aspherical and have specific paraxial curvature radii. The first lens is arranged so that a surface on the object side is away from an image plane by a specific distance on an optical axis. The imaging lens has a specific angle of view. The fourth lens is arranged away from the fifth lens by a specific distance.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: January 28, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • Imaging lens
    Patent number: 10545316
    Abstract: An imaging lens includes a first lens having at least one aspheric surface and positive refractive power; a second lens having at least one aspheric surface; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens having at least one aspheric surface; a sixth lens having two aspheric surfaces; and a seventh lens having two aspheric surfaces and negative refractive power, arranged in this order from an object side to an image plane side respectively with a space in between. The imaging lens has a total of seven lenses. The fifth lens is disposed away from the sixth lens by a specific distance on an optical axis. The second lens has a specific Abbe's number.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: January 28, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • IMAGING LENS
    Publication number: 20200012075
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens having negative refractive power; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The first lens is formed in a meniscus shape near an optical axis thereof. The third lens is formed in a meniscus shape so that a surface thereof directing to the object side is convex near an optical axis thereof. The sixth lens is formed in a meniscus shape near an optical axis thereof.
    Type: Application
    Filed: September 18, 2019
    Publication date: January 9, 2020
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20200012076
    Abstract: An imaging lens includes a stop; a first lens having positive refractive power; a second lens having negative refractive power; 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 first lens is formed in a meniscus shape near an optical axis thereof. The third lens is formed in a shape so that a surface thereof directing to the image plane side is concave near an optical axis thereof. The sixth lens is formed in a meniscus shape near an optical axis thereof.
    Type: Application
    Filed: September 18, 2019
    Publication date: January 9, 2020
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20200012074
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens; a third lens having negative refractive power; 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 is formed in a meniscus shape near an optical axis thereof. The third lens is formed in a meniscus shape so that a surface thereof directing to the object side is convex near an optical axis thereof. The sixth lens is formed in a meniscus shape near an optical axis thereof.
    Type: Application
    Filed: September 18, 2019
    Publication date: January 9, 2020
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • Imaging lens
    Patent number: 10520702
    Abstract: An imaging lens includes a first lens group; a second lens group; and a third lens group. The first lens group includes a stop, 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 and a seventh lens. The first to seventh lenses are arranged on an optical axis with a space in between respectively. The fifth lens is formed in a meniscus shape 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. The surface of the seventh lens on the image plane side is formed in an aspheric shape having at least one inflexion point. The third lens has a specific Abbe's number.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: December 31, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • 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: 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
    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
    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: 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