Patents by Inventor Takakazu Bito

Takakazu Bito 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: 10705317
    Abstract: A zooming imaging optical system includes, in order from an object side to an image side, at least: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; a fifth lens group having negative refractive power; and a sixth lens group. During zooming, the distance between adjacent lens groups changes. During focusing from an object at infinity to a close object, the fifth lens group moves along an optical axis toward an imaging surface side. The second lens group includes, in order from the object side to the image side, at least: a 2a-th lens group; and a 2b-th lens group having negative refractive power. Image stabilization is performed by displacing the 2b-th lens group perpendicularly to the optical axis. The optical system satisfies a predetermined conditional expression.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: July 7, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takakazu Bito, Ryosuke Sato
  • Publication number: 20190041607
    Abstract: A zooming imaging optical system includes, in order from an object side to an image side, at least: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; a fifth lens group having negative refractive power; and a sixth lens group. During zooming, the distance between adjacent lens groups changes. During focusing from an object at infinity to a close object, the fifth lens group moves along an optical axis toward an imaging surface side. The second lens group includes, in order from the object side to the image side, at least: a 2a-th lens group; and a 2b-th lens group having negative refractive power. Image stabilization is performed by displacing the 2b-th lens group perpendicularly to the optical axis. The optical system satisfies a predetermined conditional expression.
    Type: Application
    Filed: July 31, 2018
    Publication date: February 7, 2019
    Inventors: Takakazu BITO, Ryosuke SATO
  • Patent number: 10168547
    Abstract: A zoom lens system according to the disclosure, in order from an object side to an image side, includes a first lens group with positive optical power, a second lens group with negative optical power, and a subsequent lens group composed of at least three lens groups. During zooming operation, the first lens group moves along the optical axis and the second lens group does not move. The second lens group has an aperture stop. The second lens group satisfies following condition (1), ?9.0?fG1/fG2??2.0 ??(1) where fG1 is the focal length of the first lens group, and fG2 is the focal length of the second lens group.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: January 1, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Takakazu Bito
  • Publication number: 20180284478
    Abstract: A zoom lens system according to the disclosure, in order from an object side to an image side, includes a first lens group with positive optical power, a second lens group with negative optical power, and a subsequent lens group composed of at least three lens groups. During zooming operation, the first lens group moves along the optical axis and the second lens group does not move. The second lens group has an aperture stop. The second lens group satisfies following condition (1), ?9.0?fG1/fG2??2.0 ??(1) where fG1 is the focal length of the first lens group, and fG2 is the focal length of the second lens group.
    Type: Application
    Filed: April 18, 2018
    Publication date: October 4, 2018
    Inventor: Takakazu BITO
  • Patent number: 10012822
    Abstract: The zoom lens system includes a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, a fourth lens group with negative power, and a fifth lens group with positive power. An aperture stop is provided between the second and the third lens groups. The third lens group includes lens element L3a and L3b with positive power, lens element L3c with negative power, and lens element L3d with positive power. The lens elements L3c and L3d are cemented. The lens element L3b corrects image blurring. The fourth lens group moves when focusing. When zooming, the first to the fourth lens group move. Here, condition (1) below is satisfied. 0.24<fL3b/fG3<3.0??(1) Where fL3b is a focal length of the lens element L3b, and fG3 is a focal length of the third lens group.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: July 3, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takahiro Kitada, Shunichiro Yoshinaga, Takakazu Bito
  • Patent number: 10009524
    Abstract: A zoom lens system includes a first lens group having a positive power, a second lens group that has a negative power and includes one lens element, a third lens group that has a positive power and includes at least two lens elements, and a subsequent lens group that has a positive power as a whole and includes at least two lens groups in order from an object side to an image side. In zooming operation, at least the first lens group to the third lens group move along an optical axis, and a condition of ?9.0<fG1/fG2<?2.0 is satisfied. Where fG1 represents a focal distance of the first lens group and fG2 represents a focal distance of the second lens group.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: June 26, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takakazu Bito, Hiroaki Suzuki
  • Patent number: 9904042
    Abstract: A zoom lens system includes a first lens unit, a second lens unit, a third lens unit, a fourth lens unit, a fifth lens unit, and a sixth lens unit. In zooming, at least the first lens unit, the second lens unit, and the third lens unit move along an optical axis so that an interval between the first lens unit and the second lens unit at a telephoto limit becomes larger than that at a wide-angle limit, and an interval between the second lens unit and the third lens unit at the telephoto limit becomes narrower than that at the wide-angle limit. An aperture diaphragm is disposed between the second lens unit and the third lens unit. A condition of 18.5<fG1/fW<30.0 (fG1: a focal length of the first lens unit, fW: a focal length of the entire system at the wide-angle limit) is satisfied.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: February 27, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Takakazu Bito
  • Publication number: 20170242227
    Abstract: The zoom lens system includes a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, a fourth lens group with negative power, and a fifth lens group with positive power. An aperture stop is provided between the second and the third lens groups. The third lens group includes lens element L3a and L3b with positive power, lens element L3c with negative power, and lens element L3d with positive power. The lens elements L3c and L3d are cemented. The lens element L3b corrects image blurring. The fourth lens group moves when focusing. When zooming, the first to the fourth lens group move. Here, condition (1) below is satisfied. 0.24<fL3b/fG3<3.0??(1) Where fL3b is a focal length of the lens element L3b, and fG3 is a focal length of the third lens group.
    Type: Application
    Filed: January 30, 2017
    Publication date: August 24, 2017
    Inventors: TAKAHIRO KITADA, SHUNICHIRO YOSHINAGA, TAKAKAZU BITO
  • Publication number: 20170184824
    Abstract: A zoom lens system according to the disclosure, in order from an object side to an image side, includes a first lens group with positive optical power, a second lens group with negative optical power, and a subsequent lens group composed of at least three lens groups. During zooming operation, the first lens group moves along the optical axis and the second lens group does not move. The second lens group has an aperture stop. The second lens group satisfies following condition (1), ?9.0?fG1/fG2??2.0 ??(1) where fG1 is the focal length of the first lens group, and fG2 is the focal length of the second lens group.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 29, 2017
    Inventor: TAKAKAZU BITO
  • Patent number: 9513472
    Abstract: A zoom lens system, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; a fourth lens unit having negative optical power; a fifth lens unit; and a sixth lens unit, wherein in zooming from a wide-angle limit to a telephoto limit at a time of image taking, the first lens unit, the second lens unit, the third lens unit, and the fourth lens unit move along an optical axis so that an interval between the third lens unit and the fourth lens unit at the telephoto limit is larger than that at the wide-angle limit, and wherein focusing from an infinity in-focus condition to a close-object in-focus condition is performed by moving the fourth lens unit along the optical axis.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: December 6, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takakazu Bito, Hiroaki Suzuki, Yoshiaki Kurioka, Yusuke Yonetani
  • Publication number: 20160202458
    Abstract: A zoom lens system includes a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit having negative optical power, and a fifth lens unit having positive optical power. A condition of 18.5<fG1/fW<30.0 (fG1: a focal length of the first lens unit, fW: a focal length of the entire system at the wide-angle limit) and a condition of 1.1<m5T/m5W<2.0 (m5T is a lateral magnification of the fifth lens unit at the telephoto limit, and m5W is a lateral magnification of the fifth lens unit at the wide-angle limit) are satisfied.
    Type: Application
    Filed: February 25, 2016
    Publication date: July 14, 2016
    Inventor: Takakazu BITO
  • Publication number: 20160195691
    Abstract: An imaging optical system, in order from an object side to an image side, includes: a first lens unit having positive optical power; and a second lens unit. In focusing from an infinity in-focus condition to a close-object in-focus condition, the first lens unit moves along an optical axis, and the second lens unit is fixed with respect to an image surface. The imaging optical system is compact, sufficiently suppresses occurrence of various aberrations, has high resolution from the infinity in-focus condition to the close-object in-focus condition, is bright and highly efficient, and is suitable for wide-angle photographing.
    Type: Application
    Filed: March 15, 2016
    Publication date: July 7, 2016
    Inventors: Takakazu BITO, Shunichiro YOSHINAGA, Hideki KAI, Tsutomu IWASHITA, Yoshiaki KURIOKA, Aya TOMITA, Hisayuki II
  • Publication number: 20160116722
    Abstract: A zoom lens system includes a first lens unit, a second lens unit, a third lens unit, a fourth lens unit, a fifth lens unit, and a sixth lens unit. In zooming, at least the first lens unit, the second lens unit, and the third lens unit move along an optical axis so that an interval between the first lens unit and the second lens unit at a telephoto limit becomes larger than that at a wide-angle limit, and an interval between the second lens unit and the third lens unit at the telephoto limit becomes narrower than that at the wide-angle limit. An aperture diaphragm is disposed between the second lens unit and the third lens unit. A condition of 18.5<fG1/fW<30.0 (fG1: a focal length of the first lens unit, fW: a focal length of the entire system at the wide-angle limit) is satisfied.
    Type: Application
    Filed: January 4, 2016
    Publication date: April 28, 2016
    Inventor: Takakazu BITO
  • Patent number: 9285573
    Abstract: A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and a subsequent lens unit, wherein the first to third lens units move along an optical axis in zooming, a part of the third lens unit is a third-b lens unit moving in a direction perpendicular to the optical axis, and the conditions: 1.5<(D2+D3b+DB)/Ir<2.4, BF/Ir<1.45 and Z=fT/fW>9.0 (D2, D3b: optical axial thicknesses of the second and third-b lens units, DB: an optical axial total thickness of the subsequent lens units, BF: a shortest optical axial distance between an apex of a most image side lens surface and an image surface, Ir=fTĂ—tan(?T), fT, fW: focal lengths of the entire system at a telephoto limit and a wide-angle limit, ?T: a half view angle at a telephoto limit) are satisfied.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: March 15, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takakazu Bito, Shinji Yamaguchi, Yasunori Tochi
  • Publication number: 20160054550
    Abstract: A zoom lens system includes a first lens group having a positive power, a second lens group that has a negative power and includes one lens element, a third lens group that has a positive power and includes at least two lens elements, and a subsequent lens group that has a positive power as a whole and includes at least two lens groups in order from an object side to an image side. In zooming operation, at least the first lens group to the third lens group move along an optical axis, and a condition of ?9.0<fG1/fG2<?2.0 is satisfied. Where fG1 represents a focal distance of the first lens group and fG2 represents a focal distance of the second lens group.
    Type: Application
    Filed: August 19, 2015
    Publication date: February 25, 2016
    Inventors: Takakazu BITO, Hiroaki SUZUKI
  • Patent number: 9182575
    Abstract: A zoom lens system having a plurality of lens units, each lens unit being composed of at least one lens element, the zoom lens system, in order from an object side to an image side, comprising: a first lens unit having negative optical power and being composed of at least two lens elements; and a second lens unit having positive optical power, wherein in zooming from a wide-angle limit to a telephoto limit at the time of image taking, the lens units are individually moved along an optical axis to vary magnification such that an interval between the first lens unit and the second lens unit decreases, and the conditions: fW/D1>7.5 and Z=fT/fW>4.0 (fW: a focal length of the entire system at a wide-angle limit, fT: a focal length of the entire system at a telephoto limit, D1: a center thickness of a lens element located on the most object side in the first lens unit) are satisfied; an imaging device; and a camera.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: November 10, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takakazu Bito, Takanori Yogo
  • Publication number: 20150103211
    Abstract: A zoom lens system, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; a fourth lens unit having negative optical power; a fifth lens unit; and a sixth lens unit, wherein in zooming from a wide-angle limit to a telephoto limit at a time of image taking, the first lens unit, the second lens unit, the third lens unit, and the fourth lens unit move along an optical axis so that an interval between the third lens unit and the fourth lens unit at the telephoto limit is larger than that at the wide-angle limit, and wherein focusing from an infinity in-focus condition to a close-object in-focus condition is performed by moving the fourth lens unit along the optical axis.
    Type: Application
    Filed: December 17, 2014
    Publication date: April 16, 2015
    Inventors: Takakazu BITO, Hiroaki SUZUKI, Yoshiaki KURIOKA, Yusuke YONETANI
  • Patent number: 8675100
    Abstract: A zoom lens system comprising a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit having negative optical power, and a fifth lens unit having positive optical power, wherein the third lens unit includes at least one lens element having positive optical power and at least one lens element having negative optical power, at least the first to third lens units are moved along an optical axis in zooming so that air spaces between the respective lens units vary, thereby performing magnification change, a lens unit positioned on the image side relative to an aperture diaphragm is moved along the optical axis in focusing, and the conditions: 8.1<fG1/Ir<10.4 and Z=fT/fW?9.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: March 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Yasunori Touchi, Takakazu Bito, Shinji Yamaguchi
  • Patent number: 8610798
    Abstract: A zoom lens system comprises: a negative first lens unit being composed of two lens elements; a positive second lens unit; and a positive third lens unit, wherein the lens units are moved such that an interval between the first lens unit and the second lens unit decreases and an interval between the second lens unit and the third lens unit increases in zooming, so that magnification change is achieved, wherein the first lens unit is composed of a negative first lens element and a positive second lens element, and wherein the condition is satisfied: 0.50<fL2/fT<1.00 where, Z=fT/fW>4.0, ?W>35, fL2: a focal length of the second lens element, fT, fW: focal lengths of the entire system at a telephoto limit, a wide-angle limit, ?W: a half view angle at a wide-angle limit.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: December 17, 2013
    Assignee: Panasonic Corporation
    Inventors: Keiki Yoshitsugu, Takakazu Bito
  • Patent number: 8576492
    Abstract: A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and one or more subsequent lens units, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, a lens unit ? which is one of the subsequent lens units does not move during zooming, but moves during transition from an imaging state to an accommodated state, and the conditions: 0.8<LT/fT<1.2, 0.12<D?/fG?<0.30 and fT/fW>9.0 (LT: overall length of lens system at a telephoto limit, D?: axial air-equivalent length between a most image side surface of the lens unit ? and an image surface, fG?: focal length of the lens unit ?, fW and fT: focal lengths of the entire system at a wide-angle limit and a telephoto limit) are satisfied.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: November 5, 2013
    Assignee: Panasonic Corporation
    Inventor: Takakazu Bito