Patents by Inventor Toshio Imaizumi

Toshio Imaizumi 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).

  • Zoom lens barrel with focusing path and focal length switching path
    Patent number: 6396645
    Abstract: A zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: May 28, 2002
    Assignee: Konica Corporation
    Inventors: Haruki Nakayama, Yuichi Honda, Toshio Imaizumi
  • Camera
    Patent number: 6160670
    Abstract: A zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: December 12, 2000
    Assignee: Konica Corporation
    Inventors: Haruki Nakayama, Yuichi Honda, Toshio Imaizumi
  • Zoom lens barrel
    Patent number: 6028718
    Abstract: A zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: February 22, 2000
    Assignee: Konica Corporation
    Inventors: Haruki Nakayama, Yuichi Honda, Toshio Imaizumi
  • Zoom lens barrel including a mechanism for moving lens groups
    Patent number: 5748386
    Abstract: A zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: May 5, 1998
    Assignee: Konica Corporation
    Inventors: Haruki Nakayama, Yuichi Honda, Toshio Imaizumi
  • Zoom lens barrel
    Patent number: 5668670
    Abstract: A zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: September 16, 1997
    Assignee: Konica Corporation
    Inventors: Haruki Nakayama, Yuichi Honda, Toshio Imaizumi