Patents by Inventor Koichi Sakuma

Koichi Sakuma 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).

  • Patent number: 11945118
    Abstract: A method of planning works for robots includes creating a work plan for a plurality of robots, each having a work tool, sharing at at least one station a work to a plurality of work parts of the workpiece. The method includes the steps of calculating a distribution of the work parts to the robots, calculating, as a robot operation, a work order of the work parts and a moving path of the work tool for each of the robots based on the calculated work distribution, and calculating a disposed location of each of the robots with respect to the workpiece and a station where the robot is disposed so that an inter-robot interference does not occur during execution of the calculated robot operation.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: April 2, 2024
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Koichi Masaoka, Shota Asazu, Hiroyuki Moriishi, Tomoya Sakuma, Yuji Hashiba, Jun Fujimori, Hitoshi Nariai, Kazumi Fukuhara
  • Publication number: 20230046807
    Abstract: Provided is a lens apparatus attachable and removable to a camera apparatus, the lens apparatus comprising a communication device configured to transmit, to an external device, information for light amount compensation of image data obtained by image pickup in the camera apparatus, in which the information includes information of a coefficient A0 of a term of 0-th-order with respect to an image height in a polynomial of n-th-order with respect to the image height, and in which a conditional expression 0.7<A0(Z)×(Fw/F(Z))2<1.3 is satisfied where A0(Z) represents the coefficient Ao at a zoom state Z, F(Z) represents an effective F-number at the zoom state Z, and Fw represents an effective F-number at a wide angle end.
    Type: Application
    Filed: October 27, 2022
    Publication date: February 16, 2023
    Inventors: Tomoyuki Nakamura, Koichi Sakuma, Kei Kinoshita
  • Patent number: 11513426
    Abstract: Provided is a lens apparatus attachable and removable to a camera apparatus, the lens apparatus comprising a communication device configured to transmit, to an external device, information for light amount compensation of image data obtained by image pickup in the camera apparatus, in which the information includes information of a coefficient A0 of a term of 0-th-order with respect to an image height in a polynomial of n-th-order with respect to the image height, and in which a conditional expression 0.7<A0(Z)×(Fw/F(Z))2<1.3 is satisfied where A0(Z) represents the coefficient A0 at a zoom state Z, F(Z) represents an effective F-number at the zoom state Z, and Fw represents an effective F-number at a wide angle end.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: November 29, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomoyuki Nakamura, Koichi Sakuma, Kei Kinoshita
  • Publication number: 20220050360
    Abstract: Provided is a lens apparatus attachable and removable to a camera apparatus, the lens apparatus comprising a communication device configured to transmit, to an external device, information for light amount compensation of image data obtained by image pickup in the camera apparatus, in which the information includes information of a coefficient A0 of a term of 0-th-order with respect to an image height in a polynomial of n-th-order with respect to the image height, and in which a conditional expression 0.7<A0(Z)×(Fw/F(Z))2<1.3 is satisfied where A0(Z) represents the coefficient A0 at a zoom state Z, F(Z) represents an effective F-number at the zoom state Z, and Fw represents an effective F-number at a wide angle end.
    Type: Application
    Filed: September 10, 2019
    Publication date: February 17, 2022
    Inventors: Tomoyuki Nakamura, Koichi Sakuma, Kei Kinoshita
  • Patent number: 11187870
    Abstract: Provided is a lens apparatus attachable and detachable to a camera apparatus including: a memory storing information for light amount compensation for image data obtained by pickup of an image formed by the lens apparatus; and a communication device configured to transmit the information to an external apparatus, the information including a coefficient of a polynomial having an n-th order with respect to an image height, “n” being a non-negative integer, the coefficient corresponding to one of a plurality of focal lengths, the plurality of focal lengths including a focal length “f”, which satisfies a conditional expression: 0.9<f/ft/(Fnw/Fnt)<4, where Fnw represents an effective f-number at a wide angle end, Fnt represents an effective f-number at a telephoto end, and “ft” represents a focal length at the telephoto end.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: November 30, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Sakuma, Tomoyuki Nakamura
  • Patent number: 11181716
    Abstract: Provided is a converter lens arranged between an interchangeable lens and an image pickup apparatus, wherein a distance from a most-object-side lens surface vertex to an object point of the converter lens, a distance L from the most-object-side lens surface vertex to a most-image-side lens surface vertex, and a most-image-side distance from the lens surface vertex to an image point of the converter lens are properly set, wherein, at least one negative lens included in a rear lens unit composed of lenses satisfying LN>0.5×L where LN is a most-object-side distance from the lens surface vertex to a surface vertex on the object side of the lenses, satisfies ?gF>?0.00162×vd+0.654, where ?gF is relative partial dispersion and vd is Abbe number in d-line, and an average focal length of the at least one negative lens, and a focal length of an entire system of the converter lens are properly set.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: November 23, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Koichi Sakuma
  • Patent number: 11156810
    Abstract: A zoom lens includes, in order from an object side to an image side: a focus lens unit configured to be moved for focusing on an optical axis; a zoom lens unit configured to be moved for zooming on the optical axis; and a relay lens unit, in which an interval between each pair of adjacent lens units is changed for zooming, and the zoom lens includes an aperture stop arranged between the zoom lens unit and the relay lens unit or within the relay lens unit, the relay lens unit includes an extender lens unit insertable into and removable from an optical path of the relay lens unit, in which the extender lens unit includes a negative lens Lm which is an m-th lens from the object side in the extender lens unit and having a refractive index and an Abbe number that satisfy predetermined conditions.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: October 26, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Koichi Sakuma
  • Publication number: 20200081232
    Abstract: A zoom lens includes, in order from an object side to an image side: a focus lens unit configured to be moved for focusing on an optical axis; a zoom lens unit configured to be moved for zooming on the optical axis; and a relay lens unit, in which an interval between each pair of adjacent lens units is changed for zooming, and the zoom lens includes an aperture stop arranged between the zoom lens unit and the relay lens unit or within the relay lens unit, the relay lens unit includes an extender lens unit insertable into and removable from an optical path of the relay lens unit, in which the extender lens unit includes a negative lens Lm which is an m-th lens from the object side in the extender lens unit and having a refractive index and an Abbe number that satisfy predetermined conditions.
    Type: Application
    Filed: August 27, 2019
    Publication date: March 12, 2020
    Inventor: Koichi Sakuma
  • Publication number: 20200081222
    Abstract: Provided is a lens apparatus attachable and detachable to a camera apparatus including: a memory storing information for light amount compensation for image data obtained by pickup of an image formed by the lens apparatus; and a communication device configured to transmit the information to an external apparatus, the information including a coefficient of a polynomial having an n-th order with respect to an image height, “n” being a non-negative integer, the coefficient corresponding to one of a plurality of focal lengths, the plurality of focal lengths including a focal length “f”, which satisfies a conditional expression: 0.9<f/ft/(Fnw/Fnt)<4, where Fnw represents an effective f-number at a wide angle end, Fnt represents an effective f-number at a telephoto end, and “ft” represents a focal length at the telephoto end.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 12, 2020
    Inventors: Koichi Sakuma, Tomoyuki Nakamura
  • Patent number: 10197780
    Abstract: A zoom lens includes a positive first unit, a negative second unit, and a rear lens system. The rear lens system includes a positive unit A, a negative unit B, and a positive C. The first unit is not moved for zooming, the unit A is moved for zooming, and intervals between adjacent lens units are changed during zooming. The first unit includes positive and negative lenses, the unit C includes positive and negative lenses, the second unit includes negative lenses, and the unit B includes positive lenses. An Abbe number average value of the positive lenses in the first unit, an Abbe number average value of the negative lenses in the second unit, an Abbe number average value of the positive lenses in the unit B, and an Abbe number average value of the positive lenses in the unit C are appropriately set.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: February 5, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Koichi Sakuma
  • Publication number: 20180372991
    Abstract: Provided is a converter lens arranged between an interchangeable lens and an image pickup apparatus, wherein a distance from a most-object-side lens surface vertex to an object point of the converter lens, a distance L from the most-object-side lens surface vertex to a most-image-side lens surface vertex, and a most-image-side distance from the lens surface vertex to an image point of the converter lens are properly set, wherein, at least one negative lens included in a rear lens unit composed of lenses satisfying LN>0.5×L where LN is a most-object-side distance from the lens surface vertex to a surface vertex on the object side of the lenses, satisfies ?gF>?0.00162×vd+0.654, where ?gF is relative partial dispersion and vd is Abbe number in d-line, and an average focal length of the at least one negative lens, and a focal length of an entire system of the converter lens are properly set.
    Type: Application
    Filed: June 21, 2018
    Publication date: December 27, 2018
    Inventor: Koichi Sakuma
  • Publication number: 20180113288
    Abstract: A zoom lens includes a positive first unit, a negative second unit, and a rear lens system. The rear lens system includes a positive unit A, a negative unit B, and a positive C. The first unit is not moved for zooming, the unit A is moved for zooming, and intervals between adjacent lens units are changed during zooming. The first unit includes positive and negative lenses, the unit C includes positive and negative lenses, the second unit includes negative lenses, and the unit B includes positive lenses. An Abbe number average value of the positive lenses in the first unit, an Abbe number average value of the negative lenses in the second unit, an Abbe number average value of the positive lenses in the unit B, and an Abbe number average value of the positive lenses in the unit C are appropriately set.
    Type: Application
    Filed: October 18, 2017
    Publication date: April 26, 2018
    Inventor: Koichi Sakuma