Patents by Inventor Takanori Yamanashi

Takanori Yamanashi 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: 8503102
    Abstract: Embodiments of a zoom lens system may comprise at least four lens groups having a NPNP power sequence. The first lens group may include a stationary lens element. The second through fourth lens groups may be movable during zooming. An additional movable N or P lens group on the image side of the system may correct field curvatures or astigmatism. The first lens group may include a stationary, N first lens subgroup and an N second lens subgroup having a movable lens element for focusing. The first lens group may contribute to low focus breathing. Multiple lens groups may have matching movement plans. Some embodiments may be high speed and have a first lens group that can be stationary during zoom. Some embodiments may have only one aspheric surface.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: August 6, 2013
    Assignee: Panavision International, L.P.
    Inventor: Takanori Yamanashi
  • Publication number: 20120268831
    Abstract: Embodiments of a zoom lens system may comprise at least four lens groups having a NPNP power sequence. The first lens group may include a stationary lens element. The second through fourth lens groups may be movable during zooming. An additional movable N or P lens group on the image side of the system may correct field curvatures or astigmatism. The first lens group may include a stationary, N first lens subgroup and an N second lens subgroup having a movable lens element for focusing. The first lens group may contribute to low focus breathing. Multiple lens groups may have matching movement plans. Some embodiments may be high speed and have a first lens group that can be stationary during zoom. Some embodiments may have only one aspheric surface.
    Type: Application
    Filed: April 19, 2011
    Publication date: October 25, 2012
    Applicant: PANAVISION INTERNATIONAL, L.P.
    Inventor: Takanori Yamanashi
  • Patent number: 8149519
    Abstract: Embodiments of an optical zoom lens system may comprise three lens groups with a PNP power sequence. The first lens group may vary focus. The second and third lens groups may be movable to vary magnification during zoom. The first lens group may include three lens subgroups with an NNP power sequence: a stationary first lens subgroup, a second lens subgroup including a movable lens element, and a stationary or movable third lens subgroup. The second lens subgroup may include two parts, which may be movable at different rates of travel to vary focus. One part may include the movable lens element. Lens elements of the first lens group may be movable according to different focus movement plans. In the first lens group, lens element movement and lens element power may contribute to provide low focus breathing over the entire zoom range. The F-number may be F/2.8 or less.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: April 3, 2012
    Assignee: Panavision International, L.P.
    Inventor: Takanori Yamanashi
  • Publication number: 20120019930
    Abstract: Embodiments of an optical zoom lens system may comprise three lens groups with a PNP power sequence. The first lens group may vary focus. The second and third lens groups may be movable to vary magnification during zoom. The first lens group may include three lens subgroups with an NNP power sequence: a stationary first lens subgroup, a second lens subgroup including a movable lens element, and a stationary or movable third lens subgroup. The second lens subgroup may include two parts, which may be movable at different rates of travel to vary focus. One part may include the movable lens element. Lens elements of the first lens group may be movable according to different focus movement plans. In the first lens group, lens element movement and lens element power may contribute to provide low focus breathing over the entire zoom range. The F-number may be F/2.8 or less.
    Type: Application
    Filed: July 26, 2010
    Publication date: January 26, 2012
    Applicant: PANAVISION INTERNATIONAL, L.P.
    Inventor: Takanori Yamanashi
  • Patent number: 7136230
    Abstract: The invention relates to an electronic image pickup system that enables a wide image-pickup, and ensures that even when an image is printed, sufficient image quality and clearness are obtained from the center to as far as the margin of the image and the image of a subject is depicted with a sense of extension. The electronic image pickup system comprises an image-formation optical system 10 for forming an image of a subject and an electronic image pickup device 20 located on an image side of the image-formation optical system for obtaining image information on the image.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: November 14, 2006
    Assignee: Olympus Corporation
    Inventors: Yuji Miyauchi, Noriyuki Iyama, Yuko Kobayashi, Katsuhiro Takada, Takanori Yamanashi
  • Publication number: 20060238887
    Abstract: A compact high performance objective zoom lens system is disclosed that provides optimum optical performance over the entire zoom focal length range at focus distances from close to infinity. The system comprises, from object space to image space, one focusing objective lens group (comprising a focus lens group and a stationary lens group) and three zoom lens groups aligned on the optical axis. The focus lens group and the zoom lens groups are axially movable along the optical axis for focusing and zooming. In one embodiment, the system has a focal length zoom region from about 19 mm to 90 mm, an aperture of F/2.7 and substantially the same optical performance as high quality fixed objective lenses of the same range. The performance characteristics of this system makes it suitable for use with both film and electronic detector cameras.
    Type: Application
    Filed: April 22, 2005
    Publication date: October 26, 2006
    Applicant: PANAVISION INTERNATIONAL, L.P.
    Inventors: Jacob Moskovich, Iain Neil, Takanori Yamanashi
  • Patent number: 7123421
    Abstract: A compact high performance objective zoom lens system is disclosed that provides optimum optical performance over the entire zoom focal length range at focus distances from close to infinity. The system comprises, from object space to image space, one focusing objective lens group (comprising a focus lens group and a stationary lens group) and three zoom lens groups aligned on the optical axis. The focus lens group and the zoom lens groups are axially movable along the optical axis for focusing and zooming. In one embodiment, the system has a focal length zoom region from about 19 mm to 90 mm, an aperture of F/2.7 and substantially the same optical performance as high quality fixed objective lenses of the same range. The performance characteristics of this system makes it suitable for use with both film and electronic detector cameras.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: October 17, 2006
    Assignee: Panavision International, L.P.
    Inventors: Jacob Moskovich, Iain A. Neil, Takanori Yamanashi
  • Patent number: 7116487
    Abstract: The invention relates to an electronic image pickup system that enables a wide image-pickup, and ensures that even when an image is printed, sufficient image quality and clearness are obtained from the center to as far as the margin of the image and the image of a subject is depicted with a sense of extension. The electronic image pickup system comprises an image-formation optical system 10 for forming an image of a subject and an electronic image pickup device 20 located on an image side of the image-formation optical system for obtaining image information on the image.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: October 3, 2006
    Assignee: Olympus Corporation
    Inventors: Yuji Miyauchi, Noriyuki Iyama, Yuko Kobayashi, Katsuhiro Takada, Takanori Yamanashi
  • Publication number: 20060158741
    Abstract: The invention relates to an electronic image pickup system that enables a wide image-pickup, and ensures that even when an image is printed, sufficient image quality and clearness are obtained from the center to as far as the margin of the image and the image of a subject is depicted with a sense of extension. The electronic image pickup system comprises an image-formation optical system 10 for forming an image of a subject and an electronic image pickup device 20 located on an image side of the image-formation optical system for obtaining image information on the image.
    Type: Application
    Filed: March 20, 2006
    Publication date: July 20, 2006
    Inventors: Yuji Miyauchi, Noriyuki Iyama, Yuko Kobayashi, Katsuhiro Takada, Takanori Yamanashi
  • Patent number: 7012759
    Abstract: A zoom lens system is disclosed. The zoom lens system forms a final image of an object and a first intermediate real image between the object and the final image. The zoom lens system includes a first optical unit located between the object and the first intermediate real image. The first optical unit comprises at least one optical subunit which is moved to change the size (magnification) of the first intermediate real image. The zoom lens system also includes a second optical unit located between the first intermediate real image and the final image, at least a portion of which is moved to change the size (magnification) of the final image. The zoom lens system provides a wide zoom range of focal lengths with continuous zooming between the focal lengths and optional image stabilization.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: March 14, 2006
    Assignee: Panavision International, L.P.
    Inventors: Ellis I. Betensky, James Brian Caldwell, Iain A. Neil, Takanori Yamanashi
  • Patent number: 6961188
    Abstract: A zoom lens system is disclosed. The zoom lens system forms a final image of an object and a first intermediate real image between the object and the final image. The zoom lens system includes a first optical unit located between the object and the first intermediate real image. The first optical unit comprises at least one optical subunit which is moved to change the size (magnification) of the first intermediate real image. The zoom lens system also includes a second optical unit located between the first intermediate real image and the final image, at least a portion of which is moved to change the size (magnification) of the final image. The zoom lens system provides a wide zoom range of focal lengths with continuous zooming between the focal lengths and optional image stabilization.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: November 1, 2005
    Assignee: Panavision Inc.
    Inventors: Ellis I. Betensky, James Brian Caldwell, Iain A. Neil, Takanori Yamanashi
  • Publication number: 20050190434
    Abstract: A zoom lens system is disclosed. The zoom lens system forms a final image of an object and a first intermediate real image between the object and the final image. The zoom lens system includes a first optical unit located between the object and the first intermediate real image. The first optical unit comprises at least one optical subunit which is moved to change the size (magnification) of the first intermediate real image. The zoom lens system also includes a second optical unit located between the first intermediate real image and the final image, at least a portion of which is moved to change the size (magnification) of the final image. The zoom lens system provides a wide zoom range of focal lengths with continuous zooming between the focal lengths and optional image stabilization.
    Type: Application
    Filed: April 29, 2005
    Publication date: September 1, 2005
    Applicant: PANAVISION INTERNATIONAL, L.P.
    Inventors: Ellis Betensky, James Caldwell, Iain Neil, Takanori Yamanashi
  • Patent number: 6717741
    Abstract: The invention relates to a two-group zoom lens of +− construction, which, albeit having a high zoom ratio, is reduced in length not only at the wide-angle end but also at the telephoto end and has a low telephoto ratio at the telephoto end where the length of the system becomes longest. The zoom lens comprises a first lens group G1 having positive refracting power and a second lens group G2 having negative refracting power. For zooming from the wide-angle end to the telephoto end of the system, each lens group moves toward the object side while the spacing between the first and second lens groups G1 and G2 becomes narrow. Specific conditions for the focal length of the second lens group G2, the amount of movement of the second lens group G2 and the zoom ratio shared by the second lens group G2 are satisfied.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: April 6, 2004
    Assignee: Olympus Corporation
    Inventor: Takanori Yamanashi
  • Publication number: 20040021953
    Abstract: A zoom lens system is disclosed. The zoom lens system forms a final image of an object and a first intermediate real image between the object and the final image. The zoom lens system includes a first optical unit located between the object and the first intermediate real image. The first optical unit comprises at least one optical subunit which is moved to change the size (magnification) of the first intermediate real image. The zoom lens system also includes a second optical unit located between the first intermediate real image and the final image, at least a portion of which is moved to change the size (magnification) of the final image. The zoom lens system provides a wide zoom range of focal lengths with continuous zooming between the focal lengths and optional image stabilization.
    Type: Application
    Filed: July 18, 2003
    Publication date: February 5, 2004
    Applicant: PANAVISION, INC.
    Inventors: Ellis I. Betensky, James Brian Caldwell, Iain A. Neil, Takanori Yamanashi
  • Patent number: 6631034
    Abstract: A compact zoom lens system maintains sufficient image-formation capabilities at a wide-angle end of greater than 700 and at a zoom ratio of greater than about 10. The zoom lens system comprises a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, and a positive fifth lens group. For zooming from a wide-angle end to a telephoto end, the first to fifth lens groups are all movable. The first and third lens groups move toward the object side. Also, the spaces between the first and second lens groups and between the third and fourth lens groups widen. At least the fourth lens group or the fifth lens group makes a non-linear movement, compensating for a fluctuation of an image plane position with zooming. Focusing is carried out by moving the first and second lens groups as an integral unit.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: October 7, 2003
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Takanori Yamanashi
  • Publication number: 20030026004
    Abstract: The invention relates to a two-group zoom lens of +− construction, which, albeit having a high zoom ratio, is reduced in length not only at the wide-angle end but also at the telephoto end and has a low telephoto ratio at the telephoto end where the length of the system becomes longest. The zoom lens comprises a first lens group G1 having positive refracting power and a second lens group G2 having negative refracting power. For zooming from the wide-angle end to the telephoto end of the system, each lens group moves toward the object side while the spacing between the first and second lens groups G1 and G2 becomes narrow. Specific conditions for the focal length of the second lens group G2, the amount of movement of the second lens group G2 and the zoom ratio shared by the second lens group G2 are satisfied.
    Type: Application
    Filed: May 16, 2002
    Publication date: February 6, 2003
    Inventor: Takanori Yamanashi
  • Patent number: 6483648
    Abstract: The invention relates to a compact zoom lens system which can be applied to a relatively large image pickup device and can maintain sufficient image-formation capability even at a wide-angle end of 70° or greater and a zoom ratio of about 10 or greater. The zoom lens system comprises a first lens group G1 having positive refracting power, a second lens group G2 having negative refracting power, a third lens group G3 having positive refracting power, a fourth lens group G4 having negative refracting power and a fifth lens group G5. During zooming from the wide-angle end to the telephoto end of the system, the lens groups G1 to G5 are all moving.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: November 19, 2002
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Takanori Yamanashi
  • Publication number: 20020154415
    Abstract: The invention relates to an electronic image pickup system that enables a wide image-pickup, and ensures that even when an image is printed, sufficient image quality and clearness are obtained from the center to as far as the margin of the image and the image of a subject is depicted with a sense of extension. The electronic image pickup system comprises an image-formation optical system 10 for forming an image of a subject and an electronic image pickup device 20 located on an image side of the image-formation optical system for obtaining image information on the image.
    Type: Application
    Filed: January 18, 2002
    Publication date: October 24, 2002
    Inventors: Yuji Miyauchi, Noriyuki Iyama, Yuko Kobayashi, Katsuhiro Takada, Takanori Yamanashi
  • Patent number: 6396643
    Abstract: The invention relates to a two-group zoom lens of +− construction, which, albeit having a high zoom ratio, is reduced in length not only at the wide-angle end but also at the telephoto end and has a low telephoto ratio at the telephoto end where the length of the system becomes longest. The zoom lens comprises a first lens group G1 having positive refracting power and a second lens group G2 having negative refracting power. For zooming from the wide-angle end to the telephoto end of the system, each lens group moves toward the object side while the spacing between the first and second lens groups G1 and G2 becomes narrow. Specific conditions for the focal length of the second lens group G2, the amount of movement of the second lens group G2 and the zoom ratio shared by the second lens group G2 are satisfied.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: May 28, 2002
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Takanori Yamanashi
  • Patent number: 6342975
    Abstract: The object of the invention is to reduce the size of a camera by the provision of a zoom lens system which has a high zoom ratio and a small telephoto ratio at the wide-angle and telephoto end, and is simple in lens arrangement and reduced in size during lens collapsing. The zoom lens system comprises a positive first lens group G1, a positive second lens group G2 and a negative third lens group G3. For zooming from a wide-angle end to a telephoto end of the system, each lens group moves toward the object side while a spacing between the first lens group and the second lens group becomes wide and a spacing between the second lens group and the third lens group becomes narrow. The first lens group G1 comprises at least one set of a negative lens and a positive lens. The second lens group G2 includes an aperture stop and comprises at least one set of a negative lens and a positive lens. The third lens group G3 comprises one set of a positive lens and a negative lens.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: January 29, 2002
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Takanori Yamanashi