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: 10281681
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens having at least one aspheric surface, arranged with a space in between. The second lens group includes a fourth lens having positive refractive power and at least one aspheric surface, a fifth lens having two aspheric surfaces, and a sixth lens having two aspheric surfaces, arranged with a space in between. The fifth lens is formed in a shape so that a curvature radius of the surface on the image plane side is positive near an optical axis. The sixth lens is formed in a shape so that a curvature radius of the surface on the object side is negative near an optical axis.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: May 7, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • Imaging lens
    Patent number: 10281689
    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 positive first lens, a second lens, and a third lens. The second lens group includes a fourth lens, a negative fifth lens, and a positive sixth lens. The first lens is formed in a shape so that surfaces thereof on the object and image plane sides have positive curvature radii. The second lens is formed in a shape so that a surface thereof on the image plane side has a negative curvature radius. The fifth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The sixth lens is formed in a shape so that surfaces thereof on the object and image plane sides are aspheric.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: May 7, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • IMAGING LENS
    Publication number: 20190094502
    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: Application
    Filed: November 27, 2018
    Publication date: March 28, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190094501
    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: Application
    Filed: November 27, 2018
    Publication date: March 28, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • Imaging lens
    Patent number: 10241302
    Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having positive refractive power; a third lens; a fourth lens; a fifth lens; and a sixth lens having negative refractive power, arranged in this order from an object side to an image plane side. The sixth lens is formed in a shape so that a curvature radius of a surface thereof on the object side and a curvature radius of a surface thereof on the image plane side are negative. The surface of the sixth lens on the image plane side has the specific curvature radius so that a specific conditional expression is satisfied.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: March 26, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • IMAGING LENS
    Publication number: 20190079273
    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 front side lens group and a rear side lens group. The front side lens group includes a fourth lens and a fifth lens. The rear side lens group includes a sixth lens having two aspheric surfaces and a seventh lens having two aspheric surfaces. The imaging lens has a total of seven single lenses. The first to seventh lenses are arranged respectively with a space in between. The third and fourth lenses have convex surfaces on the image plane side. The fifth lens has a convex surface on the object side. The rear side lens group has a specific focal length.
    Type: Application
    Filed: November 13, 2018
    Publication date: March 14, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190079272
    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 positive refractive power, a sixth lens having two aspheric surfaces, and a seventh lens having two aspheric surfaces. The imaging lens has a total of seven single lenses. The first to seventh lenses are arranged respectively with a space in between. The third lens is formed in a shape so that a surface on the object side is convex. The fourth lens is formed in a shape so that a surface on the object side is concave. The fifth lens is formed in a shape so that a surface on the image plane side is concave.
    Type: Application
    Filed: November 12, 2018
    Publication date: March 14, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • IMAGING LENS
    Publication number: 20190079274
    Abstract: An imaging lens includes a first lens group and a second lens group, arranged 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 front side lens group and a rear side lens group. The front side lens group includes a fourth lens and a fifth lens. The rear side lens group includes a sixth lens and a seventh lens both having two aspheric surfaces. The imaging lens has a total of seven single lenses. The first to seventh lenses are arranged respectively with a space in between. The third lens has convex surfaces on both sides. The fourth lens has a concave surface on the object side. The fifth lens has a concave surface on the image plane side. The rear side lens group has a specific focal length.
    Type: Application
    Filed: November 13, 2018
    Publication date: March 14, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
  • Imaging lens
    Patent number: 10209489
    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 having negative refractive power; and a sixth lens having negative refractive power, 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 on the object side and a surface on the image plane side have negative curvature radii. The first lens has a specific focal length, the second lens has a specific focal length, the fourth lens is arranged to be away from the fifth lens by a specific distance on an optical axis, and the surface of the sixth lens on the image plane side has a specific curvature radius so that specific conditional expressions are satisfied.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: February 19, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • Imaging lens
    Patent number: 10209493
    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 positive first lens, a positive second lens, and a negative third lens. The second lens group includes a fourth lens, a fifth lens, and a sixth lens. The first lens is formed in a shape so that surfaces thereof on the object and image plane sides have positive curvature radii. The fifth lens is formed in a shape so that a surface thereof on the object side has a positive curvature radius. The sixth lens is formed in a shape so that a surface thereof on the object side and a surface thereof on the image plane side are aspheric. The first to third lenses are arranged specifically and have specific Abbe's numbers.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: February 19, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
  • IMAGING LENS
    Publication number: 20190041612
    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: Application
    Filed: September 17, 2018
    Publication date: February 7, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190033560
    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 and negative refractive power; 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 fifth lens is disposed away from the sixth lens by a specific distance on an optical axis.
    Type: Application
    Filed: September 17, 2018
    Publication date: January 31, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • NOISE REDUCTION DEVICE
    Publication number: 20190027128
    Abstract: A noise reduction device includes a plurality of noise microphones, a noise controller, and a control speaker. The noise controller generates a control sound signal for reducing, at a center of control in a control space, noise detected by the noise microphones. The number of noise microphones disposed closer than a distance d from the center of control is less than the number disposed farther than distance d, when distance d is expressed as d=d0+t×v??/2, where ? is a wavelength corresponding to a control frequency f in the noise microphones, d0 is the distance from the center of control to the control speaker, t is the control delay time in the control speaker, and v is sound velocity. The noise microphones that are disposed farther than the distance d from the center of control are approximately equally spaced apart.
    Type: Application
    Filed: September 26, 2018
    Publication date: January 24, 2019
    Inventors: Junji ARAKI, Kenichi KUBOTA
  • IMAGING LENS
    Publication number: 20190018223
    Abstract: An imaging lens includes a first lens having one aspheric surface and positive refractive power; a second lens having one aspheric surface and negative refractive power; a third lens having one aspheric surface; a fourth lens having one aspheric surface; a fifth lens having 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 meniscus shape so that a surface on the object side is convex near an optical axis. The sixth lens is formed in a shape so that a surface on the image plane side is concave near an optical axis. The fifth lens has a specific Abbe's number.
    Type: Application
    Filed: September 18, 2018
    Publication date: January 17, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190011675
    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: Application
    Filed: September 14, 2018
    Publication date: January 10, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190011676
    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 fourth lens and the sixth lens have specific Abbe's numbers.
    Type: Application
    Filed: September 14, 2018
    Publication date: January 10, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190004291
    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: Application
    Filed: September 10, 2018
    Publication date: January 3, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190004290
    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 second lens is formed in a meniscus shape near an optical axis. The third lens is formed in a meniscus shape so that a surface on the object side is convex near an optical axis. The sixth lens is formed in a meniscus shape 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. The first lens and the second lens have specific Abbe's numbers.
    Type: Application
    Filed: September 10, 2018
    Publication date: January 3, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • IMAGING LENS
    Publication number: 20190004287
    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 thereof on the object side is convex near an optical axis. The fifth lens is formed in a shape so that a surface thereof on the image plane side is concave near an optical axis. The seventh lens is formed in a shape so that a surface thereof on the image plane side has at least one inflexion point and is concave near an optical axis.
    Type: Application
    Filed: September 6, 2018
    Publication date: January 3, 2019
    Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Tomohiro YONEZAWA
  • Imaging lens
    Patent number: RE47270
    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; and a fourth and a fifth lens having negative refractive power. The first lens is formed so that a curvature radius of an object-side surface is positive and the second lens is formed so that a curvature radius of an object-side surface and a curvature radius of an image plane-side surface are positive. The third lens is formed so that a curvature radius of an object-side surface is positive, and the fifth lens is formed so that a curvature radius of an object-side surface and a curvature radius of an image plane-side surface are both positive. An Abbe's number from the first and the third to the fifth lens is greater than 45, and an Abbe's number of the second lens is less than 35.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: March 5, 2019
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Ichiro Kurihara, Yoshio Ise, Tomohiro Yonezawa