Patents by Inventor Yoshito Miyatake

Yoshito Miyatake 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: 8368801
    Abstract: There are provided a camera system and an interchangeable lens that are compatible with a contrast detection method. A camera system (1) has an interchangeable lens unit (2) and a camera body (3). A lens microcomputer (40) changes the movable range of a second lens group (L2) via a focus lens drive controller (41) depending on whether a second holder (61) is driven by the focus lens drive controller (41) and a focus motor (80) on the basis of angle information inputted to a zoom ring (64) of the interchangeable lens unit (2), or the second holder (61) is driven by the focus lens drive controller (41) on the basis of contrast information.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: February 5, 2013
    Assignee: Panasonic Corporation
    Inventors: Takeo Santo, Naoto Yumiki, Yoshito Miyatake, Hiroshi Kubota
  • Patent number: 8339501
    Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein the zoom lens system, in order from the object side to the image side, comprises: a first lens unit having positive optical power and comprising four lens elements; a second lens unit having negative optical power; and a third lens unit having positive optical power; wherein in zooming from a wide-angle limit to a telephoto limit at the time of image taking, at least the first lens unit is moved along an optical axis direction so as to achieve variable magnification, and wherein the conditions are satisfied: 0.30<f1/fT<0.70 and Z=fT/fW>20.5 (f1 is a composite focal length of the first lens unit, fW is a focal length of the entire system at a wide-angle limit, and fT is a focal length of the entire system at a telephoto limit), an imaging device and a camera are provided.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: December 25, 2012
    Assignee: Panasonic Corporation
    Inventors: Takakazu Bito, Yoshito Miyatake, Mamoru Honjo
  • Patent number: 7948685
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a cemented lens element fabricated by two lens elements having optical power of mutually different signs and one single lens element; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: May 24, 2011
    Assignee: Panasonic Corporation
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Patent number: 7948684
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a first cemented lens element of two lens elements having power of mutually different signs and a second cemented lens element of two lens elements having power of mutually different signs; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: May 24, 2011
    Assignee: Panasonic Corporation
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Publication number: 20110109788
    Abstract: There are provided a camera system and an interchangeable lens that are compatible with a contrast detection method. A camera system (1) has an interchangeable lens unit (2) and a camera body (3). A lens microcomputer (40) changes the movable range of a second lens group (L2) via a focus lens drive controller (41) depending on whether a second holder (61) is driven by the focus lens drive controller (41) and a focus motor (80) on the basis of angle information inputted to a zoom ring (64) of the interchangeable lens unit (2), or the second holder (61) is driven by the focus lens drive controller (41) on the basis of contrast information.
    Type: Application
    Filed: August 26, 2008
    Publication date: May 12, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Takeo Santo, Naoto Yumiki, Yoshito Miyatake, Hiroshi Kubota
  • Publication number: 20110063479
    Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein the zoom lens system, in order from the object side to the image side, comprises: a first lens unit having positive optical power and comprising four lens elements; a second lens unit having negative optical power; and a third lens unit having positive optical power; wherein in zooming from a wide-angle limit to a telephoto limit at the time of image taking, at least the first lens unit is moved along an optical axis direction so as to achieve variable magnification, and wherein the conditions are satisfied: 0.30<f1/fT<0.70 and Z=fT/fW>20.5 (f1 is a composite focal length of the first lens unit, fW is a focal length of the entire system at a wide-angle limit, and fT is a focal length of the entire system at a telephoto limit), an imaging device and a camera are provided.
    Type: Application
    Filed: September 10, 2010
    Publication date: March 17, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Takakazu Bito, Yoshito Miyatake, Mamoru Honjo
  • Patent number: 7800831
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a first cemented lens element of two lens elements having power of mutually different signs and a second cemented lens element of two lens elements having power of mutually different signs; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: September 21, 2010
    Assignee: Panasonic Corporation
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Publication number: 20100226019
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a cemented lens element fabricated by two lens elements having optical power of mutually different signs and one single lens element; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Application
    Filed: May 21, 2010
    Publication date: September 9, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Patent number: 7755847
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a single third lens element, a cemented lens element of two lens elements having power of mutually different signs and a single sixth lens element; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: July 13, 2010
    Assignee: Panasonic Corporation
    Inventors: Katsu Yamada, Keiki Yoshitsugu, Yoshito Miyatake, Kazuhiko Ishimaru
  • Patent number: 7742235
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a cemented lens element fabricated by two lens elements having optical power of mutually different signs and one single lens element; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: June 22, 2010
    Assignee: Panasonic Corporation
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Publication number: 20100007965
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a first cemented lens element of two lens elements having power of mutually different signs and a second cemented lens element of two lens elements having power of mutually different signs; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Application
    Filed: September 17, 2009
    Publication date: January 14, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Publication number: 20100007968
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a first cemented lens element of two lens elements having power of mutually different signs and a second cemented lens element of two lens elements having power of mutually different signs; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Application
    Filed: September 17, 2009
    Publication date: January 14, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Patent number: 7593166
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a first cemented lens element of two lens elements having power of mutually different signs and a second cemented lens element of two lens elements having power of mutually different signs; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: September 22, 2009
    Assignee: Panasonic Corporation
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Publication number: 20080297917
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a first cemented lens element of two lens elements having power of mutually different signs and a second cemented lens element of two lens elements having power of mutually different signs; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 4, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Publication number: 20080297915
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a single third lens element, a cemented lens element of two lens elements having power of mutually different signs and a single sixth lens element; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?iW<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 4, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Katsu Yamada, Keiki Yoshitsugu, Yoshito Miyatake, Kazuhiko Ishimaru
  • Publication number: 20080297916
    Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein: the first lens unit comprises a first lens element having a concave surface at least on the image side and negative power and a second lens element having a convex surface at least on the object side and positive power; the second lens unit comprises a cemented lens element fabricated by two lens elements having optical power of mutually different signs and one single lens element; in zooming, all of the lens units move along an optical axis; and conditions (1): 5.0<?i W<20.0 and (I-2): n11?1.9 (where, 3.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 4, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Keiki Yoshitsugu, Katsu Yamada, Yoshito Miyatake, Kazuhiko Ishimaru
  • Patent number: 7023623
    Abstract: It is an object to provide a zoom lens made of three groups having a zoom ratio of ×2.5 to ×3.2 if the object distance is ?, an field angle at the wide-angle end of 60° to 70°, high resolution, and a short optical total length when not in use. The zoom lens is made of a first lens group (G1) with a negative power, a second lens group (G2) with a positive power, and a third lens group (G3) with a positive power, arranged in that order from an object side to an image plane (S) side. The first lens group (G1) is made of a first lens (L1) that is a negative meniscus lens whose surface with strong curvature is facing the image plane (S) side and a second lens (L2) that is a positive meniscus lens whose surface with strong curvature is facing the object side, arranged in that order from the object side.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: April 4, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshito Miyatake, Keiki Yoshitsugu
  • Patent number: 6925253
    Abstract: A zoom lens comprising, disposed in order from an object side to an image surface side, a negative-power first lens group, a diaphragm, a positive-power second lens group, and a positive power third lens group, characterized in that, when zooming from a wide-angle end to a telelscope end, an air gap between the first lens group and the second lens group shrinks and an air gap between the second lens group and the third lens group expands, the third lens group is movable in an optical axis direction for focusing, and a zoom ratio at a shooting distance of ? is 2.5- to 3.2-magnification.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: August 2, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Yoshito Miyatake
  • Publication number: 20040076417
    Abstract: A zoom lens comprising, disposed in order from an object side to an image plane side, a first lens group with a negative power, an aperture stop, a second lens group with a positive power, and a third lens group with a positive power, characterized in that, when zooming from a wide-angle end to a telescope end, an air gap between the first lens group and the second lens group is reduced and an air gap between the second lens group and the third lens group is increased, the third lens group can be moved in the direction of the optical axis for focus adjustment, and a zoom ratio is ×2.5 to ×3.2 if a shooting distance is ∞.
    Type: Application
    Filed: September 29, 2003
    Publication date: April 22, 2004
    Inventor: Yoshito Miyatake
  • Patent number: 6507374
    Abstract: Where a stack projection operation is carried out using first and second projection display units, it is arranged such that the first projection display unit projects a crosshatch pattern continuously in time while on the other hand, the second projection display unit projects a pattern identical with that crosshatch pattern such that the pattern flashes at given intervals of time. Thereafter, the state of superposition between the patterns projected from the two projection display units is examined to carry out inter-set convergence adjustment between the display units.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: January 14, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshito Miyatake, Tsutomu Muraji