Patents by Inventor Ryosuke NAGAMI

Ryosuke NAGAMI 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).

  • Publication number: 20210311287
    Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.
    Type: Application
    Filed: June 10, 2021
    Publication date: October 7, 2021
    Applicant: FUJIFILM Corporation
    Inventor: Ryosuke NAGAMI
  • Patent number: 11137584
    Abstract: The imaging lens consists of, in order from an object side, a positive first lens group, a positive second lens group, and a negative third lens group. During focusing, only the second lens group moves. The number of lenses included in the second lens group is two or less. The lens on the most object side is a negative lens having a convex surface toward the object side. The lens surface on the most image side is a convex surface. The first lens group includes a stop. Predetermined conditional expressions related to the first lens group and the second lens group are satisfied.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: October 5, 2021
    Assignee: FUJIFILM Corporation
    Inventor: Ryosuke Nagami
  • Publication number: 20210286156
    Abstract: A zoom lens consists of, in order from an object side to an image side: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a negative refractive power; and a sixth lens group having a positive refractive power. During zooming from the wide angle end to the telephoto end, the distance between the adjacent lens groups in the optical axis direction changes, and the third lens group and the fifth lens group move integrally along the optical axis.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 16, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Taiga NODA, Ryosuke NAGAMI
  • Publication number: 20210224958
    Abstract: Provided are an image blur correcting device that capable of improving a degree of freedom in design and realizing miniaturization or weight reduction, a lens device including the image blur correcting device, and an imaging device including the lens device. An image blur correcting device includes a fixing member, a first movable member that is supported by the fixing member in a state of being movable in a direction X, and a second movable member that is supported by the first movable member in a state of being movable in a direction Y. A second coil that drives the second movable member is fixed to one first surface of the second movable member in a direction Z, and a first coil that drives the first movable member is fixed to the other second surface of the second movable member in the direction Z.
    Type: Application
    Filed: April 2, 2021
    Publication date: July 22, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Keito KAMIO, Kazuaki OKAMORI, Shinichiro FUJIKI, Ryosuke NAGAMI
  • Patent number: 11067773
    Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: July 20, 2021
    Assignee: FUJIFILM Corporation
    Inventor: Ryosuke Nagami
  • Publication number: 20210208486
    Abstract: A lens unit includes a guided portion that includes a first bearing portion and a second bearing portion disposed to be spaced apart from each other in a direction X and is slidably supported by a guide shaft, and a lens holding member. A first distance between the center of a fixing portion of the lens holding member and the center of the first bearing portion in the direction X is set to be longer than a second distance between the center of the fixing portion and the center of the second bearing portion in the direction X. A first tilt-preventing member having a linear expansion coefficient lower than that of the lens holding member is fixed to a region, which is closer to the first bearing portion than the center of the fixing portion, of a portion of the guided portion positioned between the first and second bearing portions.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Takeya ABE, Keito KAMIO, Ryosuke NAGAMI, Shinichiro FUJIKI, Kazuaki OKAMORI, Yuya SAKAI
  • Publication number: 20200326506
    Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.
    Type: Application
    Filed: June 29, 2020
    Publication date: October 15, 2020
    Applicant: FUJIFILM Corporation
    Inventor: Ryosuke NAGAMI
  • Patent number: 10739555
    Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: August 11, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Ryosuke Nagami
  • Publication number: 20200166730
    Abstract: The imaging lens includes, as lens groups, only a positive first lens group, a positive second lens group, and a negative third lens group in order from the object side. An aperture stop is disposed between a lens surface closest to the image side in the first lens group and a lens surface closest to the object side in the third lens group. During focusing, the first lens group and the third lens group do not move, and the second lens group moves. The first lens group consists of a negative lens and a positive lens in order from the object side. The third lens group has a negative lens and a positive lens in order from the object side.
    Type: Application
    Filed: November 20, 2019
    Publication date: May 28, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Ryosuke NAGAMI, Tetsuya ORI
  • Publication number: 20200073096
    Abstract: The imaging lens consists of, in order from an object side, a positive first lens group, a positive second lens group, and a negative third lens group. During focusing, only the second lens group moves. The number of lenses included in the second lens group is two or less. The lens on the most object side is a negative lens having a convex surface toward the object side. The lens surface on the most image side is a convex surface. The first lens group includes a stop. Predetermined conditional expressions related to the first lens group and the second lens group are satisfied.
    Type: Application
    Filed: August 8, 2019
    Publication date: March 5, 2020
    Applicant: FUJIFILM Corporation
    Inventor: Ryosuke NAGAMI
  • Publication number: 20190064477
    Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.
    Type: Application
    Filed: August 22, 2018
    Publication date: February 28, 2019
    Applicant: FUJIFILM Corporation
    Inventor: Ryosuke NAGAMI
  • Patent number: 10168507
    Abstract: The imaging lens consists of, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. The first lens group has a positive lens, a positive lens, and a negative lens successively in order from a position closest to the object side. The second lens group consists of one negative lens. The third lens group includes two or less lenses. During focusing, only the second lens group moves. The following conditional expression, which relates to a focal length f of the whole system in a state where the object at infinity is in focus and a focal length f2 of the second lens group, is satisfied: 0.4<|f/f2|<1.3.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: January 1, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Ryosuke Nagami, Tetsuya Ori
  • Patent number: 10101565
    Abstract: An imaging lens includes, in order from the object side to the image side, a positive first lens group, a stop, a positive second lens group, and a positive third lens group. The first lens group includes, consecutively in order from the most object side thereof, a negative lens and a positive lens. The second lens group is of a three lens configuration and includes a positive lens and a negative lens. The third lens group includes, consecutively in order from the most object side thereof, a negative lens and a positive lens. The imaging lens satisfies Conditional Formula (1): 0<f1/f2<2, which is related to the focal length f1 of the first lens group and the focal length f2 of the second lens group.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 16, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Ryosuke Nagami, Takashi Suzuki
  • Publication number: 20180095246
    Abstract: The imaging lens consists of, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. The first lens group has a positive lens, a positive lens, and a negative lens successively in order from a position closest to the object side. The second lens group consists of one negative lens. The third lens group includes two or less lenses. During focusing, only the second lens group moves. The following conditional expression, which relates to a focal length f of the whole system in a state where the object at infinity is in focus and a focal length f2 of the second lens group , is satisfied: 0.4<|f/f2|<1.3.
    Type: Application
    Filed: September 28, 2017
    Publication date: April 5, 2018
    Inventors: Ryosuke NAGAMI, Tetsuya ORI
  • Publication number: 20170075089
    Abstract: An imaging lens includes, in order from the object side to the image side, a positive first lens group, a stop, a positive second lens group, and a positive third lens group. The first lens group includes, consecutively in order from the most object side thereof, a negative lens and a positive lens. The second lens group is of a three lens configuration and includes a positive lens and a negative lens. The third lens group includes, consecutively in order from the most object side thereof, a negative lens and a positive lens. The imaging lens satisfies Conditional Formula (1): 0<f1/f2<2, which is related to the focal length f1 of the first lens group and the focal length f2 of the second lens group.
    Type: Application
    Filed: August 17, 2016
    Publication date: March 16, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Ryosuke NAGAMI, Takashi SUZUKI