Patents Assigned to Tamron Co., Ltd.
  • Publication number: 20200386979
    Abstract: Binoculars including a range finding function capable of enabling the correction of image shake over a broad range are provided. The present invention is a binocular (1) having: a binocular body 2, objective lens systems (4), eyepiece lens system (6), a pair of shake compensation lens systems (8) for stabilizing images, lens actuators (10) for driving shake compensation lens systems, a shake detection sensor (12), a control device (14) for controlling the lens actuators, a laser light source (16) for emitting laser light from the first objective lens system through a first shake compensation lens system, a light receiving element (22) for receiving laser light reflected by an observed object through a second objective lens system and second shake compensation lens system, and a computing device (2) for calculating the distance to an observed object based on laser light received by a light receiving element.
    Type: Application
    Filed: December 12, 2017
    Publication date: December 10, 2020
    Applicant: TAMRON CO., LTD.
    Inventor: Masamitsu Hyodo
  • Patent number: 10848674
    Abstract: The present invention relates to an image stabilization device for correcting an image shake formed on an image face of an imaging device, and the image stabilization device includes a shake angle sensor configured to detect a shake angle of the imaging device, a correction amount calculation unit configured to set a movement amount of an image stabilization lens composing a part of an imaging optical system provided in the imaging device or a movement amount of the imaging face based on the shake angle detected by the shake angle sensor so that the image shake formed on the imaging face is suppressed, and an actuator configured to move the image stabilization lens or the imaging face by the movement amount set by the correction amount calculation unit in a plane orthogonal to an optical axis of the imaging device.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: November 24, 2020
    Assignee: TAMRON CO., LTD.
    Inventor: Eiri Sudo
  • Patent number: 10845515
    Abstract: A contacted multilayer diffractive optical element having reduced wavelength dependency of diffraction efficiency, the contacted multilayer diffractive optical element facilitating processing in manufacture and being suitable for an infrared optical system, and an infrared optical system and an image pickup apparatus using the diffractive optical element. In order to achieve the above object, a contacted multilayer diffractive optical element comprises a first layer consisting of a first chalcogenide glass material and a second layer consisting of a second chalcogenide glass material, the first chalcogenide glass material and the second chalcogenide glass material satisfying a predetermined conditional expression and being in contact with and stacked on each other, and a diffraction grating structure in a surface of the contact therebetween, and an infrared optical system and an image pickup apparatus comprising the contacted multilayer diffractive optical element are provided.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: November 24, 2020
    Assignee: Tamron Co., Ltd.
    Inventor: Kazunori Komori
  • Publication number: 20200355889
    Abstract: An imaging optics including, in sequence starting from the object side, of a 1st lens G1 with a negative refractive power, a 2nd lens G2 with a positive refractive power, a 3rd lens G3 with a positive refractive power, and a 4th lens G4, a 5th lens G5, a 6th lens G6, and a 7th lens G7 with a negative refractive power, satisfying the conditional expressions.
    Type: Application
    Filed: December 17, 2019
    Publication date: November 12, 2020
    Applicant: TAMRON CO., LTD.
    Inventors: Toshihide Hayashi, Koichiro Yokota, Takayuki Noda
  • Patent number: 10830994
    Abstract: An imaging lens according to the present invention includes a negative first lens, a meniscus-shaped negative second lens having a concave surface facing to an object side, a positive third lens, a positive fourth lens having a convex surface on the object side, a positive fifth lens, a negative sixth lens, and a positive seventh lens arranged in order from the object side. Furthermore, an imaging device according to the present invention includes the imaging lens.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: November 10, 2020
    Assignee: TAMRON CO., LTD.
    Inventors: Seigo Nakai, Yasuhiko Obikane
  • Publication number: 20200341247
    Abstract: An imaging lens and an imaging device furnished with same, including a first lens group having a positive refractive power, a second lens group having a positive refractive power, and a third lens group having a negative refractive power, disposed in sequence from the object side, wherein zooming from a point at infinity to an object at the near point is performed by moving the second lens group along an optical axis toward the object side while affixing the first lens group and third lens group, and satisfying predetermined conditional expressions.
    Type: Application
    Filed: November 19, 2019
    Publication date: October 29, 2020
    Applicant: TAMRON CO., LTD.
    Inventors: Junichi Yamazoe, Koutarou Joujiki
  • Publication number: 20200285041
    Abstract: An observation imaging apparatus includes an insertion unit, an imaging lens, and an image sensor. The imaging lens is disposed in such a manner that an axial principal ray of an observation subject side surface of a lens is tilted with respect to a normal line passing through the center of gravity of a section of the insertion unit, the section passing through the center of an effective imaging range of the image sensor and having the smallest area. A point on the axial principal ray at which the distance between the normal line and the axial principal ray is smallest is located on the image side relative to the observation subject side surface of the lens and on the observation subject side relative to the image sensor. The observation imaging apparatus satisfies a predetermined conditional expression.
    Type: Application
    Filed: August 28, 2019
    Publication date: September 10, 2020
    Applicant: TAMRON CO., LTD.
    Inventors: Yasuhiko OBIKANE, Yoshito IWASAWA, Yuichi IMAMIYA, Yuri KOYAMA
  • Publication number: 20200271896
    Abstract: An imaging optical system includes, in order from an object side, a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens and a fifth lens, with the fourth lens and the fifth lens not cemented, in which a predetermined conditional expressions is satisfied.
    Type: Application
    Filed: October 7, 2019
    Publication date: August 27, 2020
    Applicant: TAMRON CO., LTD.
    Inventors: Takayuki NODA, Yasuhiko OBIKANE
  • Publication number: 20200264413
    Abstract: To attain the above-described objective, a zoom lens according to the present invention includes sequentially from an object side, a front group which includes at least three lens groups and has positive refractive power as a whole, and a lens group disposed on an image side of the front group, a magnification is changed by a change of a distance on an optical axis between adjacent lens groups, the lens group includes sequentially from an image side, a lens component, a lens component, and a lens component, the lens group is moved to an object side at a time of changing a magnification from a wide-angle end to a telephoto end, focusing is obtained by movement of a part of lens groups in the front group along an optical axis, and a predetermined condition expression is satisfied.
    Type: Application
    Filed: August 29, 2019
    Publication date: August 20, 2020
    Applicant: TAMRON CO., LTD.
    Inventor: Hisayuki YAMANAKA
  • Patent number: 10721398
    Abstract: An imaging optical system according to the present invention is the imaging optical system composed by arranging a front group, a stop, and a rear group in order from an object side, a lens arranged closest to the stop in the front group is a positive lens, a lens arranged closest to the stop in the rear group is also a positive lens, and specific conditional expressions are satisfied. In addition, an imaging apparatus according to the present invention includes the imaging optical system.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: July 21, 2020
    Assignee: Tamron Co., Ltd.
    Inventors: Koutarou Joujiki, Yasuhiko Obikane
  • Publication number: 20200209598
    Abstract: Provided is an optical system and an imaging apparatus provided with the optical system. The optical system includes: a first lens having negative refractive power; a second lens having negative refractive power; a third lens having positive refractive power; and a fourth lens having positive refractive power, the first lens, the second lens, the third lens, and the fourth lens being disposed in this order from an object side. The optical system satisfies a predetermined condition relating to the focal length of the optical system and the distance on the optical axis between an exit pupil and an imaging plane in the optical system.
    Type: Application
    Filed: August 27, 2019
    Publication date: July 2, 2020
    Applicant: TAMRON CO., LTD.
    Inventor: Masaki SATO
  • Publication number: 20200132970
    Abstract: A correction lens is used in an optical system in which a light-transmissive cover member having radii of curvature different from each other in a predetermined first direction and a second direction perpendicular to the first direction is disposed on an object side. Radii of curvature of an image-side surface of the correction lens are different in the first direction and the second direction, and satisfy a predetermined condition.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 30, 2020
    Applicant: TAMRON CO., LTD.
    Inventor: Shingo FUSE
  • Publication number: 20200132885
    Abstract: There is provided an optical element with antireflection structure on at least a part of an optical effective surface. The optical element includes an outer peripheral wall surface that is substantially parallel to an optical axis at the entire outer periphery of at least one side of the optical effective surface toward the other side, and an annular plate portion that extends from the outer peripheral wall surface to the outside in a diameter direction perpendicular to the optical axis. The annular plate portion surrounds the entire outer periphery of the optical effective surface, and an outer peripheral front end includes a free end surface formed by causing an optical element glass material to flow.
    Type: Application
    Filed: August 27, 2019
    Publication date: April 30, 2020
    Applicant: TAMRON CO., LTD.
    Inventors: Shunya FUKUI, Terufusa KUNISADA, Shigenori HOSOYA
  • Patent number: 10627609
    Abstract: The present invention provides a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group has at least two cemented surfaces having negative refractive power, convex lenses GpH and GpL satisfying predetermined conditional expressions. An aperture stop is arranged in the first lens group or after. The zoom lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: April 21, 2020
    Assignee: Tamron Co., Ltd.
    Inventor: Keisuke Okada
  • Patent number: 10606044
    Abstract: An object of the present invention is to provide a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group includes convex lenses GpH and GpL satisfying predetermined conditional expressions. The convex lens GpH is the positive lens which is arranged second position or after from the object side in positive lenses in the GR group.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: March 31, 2020
    Assignee: Tamron Co., Ltd.
    Inventor: Keisuke Okada
  • Publication number: 20200077024
    Abstract: The present invention relates to an image stabilization device for correcting an image shake formed on an image face of an imaging device, and the image stabilization device includes a shake angle sensor configured to detect a shake angle of the imaging device, a correction amount calculation unit configured to set a movement amount of an image stabilization lens composing a part of an imaging optical system provided in the imaging device or a movement amount of the imaging face based on the shake angle detected by the shake angle sensor so that the image shake formed on the imaging face is suppressed, and an actuator configured to move the image stabilization lens or the imaging face by the movement amount set by the correction amount calculation unit in a plane orthogonal to an optical axis of the imaging device.
    Type: Application
    Filed: July 25, 2019
    Publication date: March 5, 2020
    Applicant: TAMRON CO., LTD.
    Inventor: Eiri SUDO
  • Patent number: 10545321
    Abstract: A zoom lens has in order from the object side, at least a foremost, first lens group having positive refractive power, a succeeding, second lens group having negative refractive power, a third lens group having positive refractive power, and a rearmost lens group having negative refractive power. The zoom lens meets requirements as defined in formulas regarding a displacement of the first lens group, a focal length of the zoom lens at the wide-angle end, a focal length of the zoom lens at the telephoto end, a focal length of the first lens group, and a focal length of the third lens group.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: January 28, 2020
    Assignee: TAMRON CO., LTD.
    Inventors: Yoshito Iwasawa, Jun Takahashi
  • Patent number: 10432870
    Abstract: The present invention addresses a problem of providing a zoom lens which achieves a longer focal length and has a shorter optical overall length at the telephoto end, and an imaging apparatus provided with the zoom lens. In order to solve the problem, a zoom lens is configured to include, in order from the object side, a positive first lens group G1, a negative second lens group G2, a positive composite positive lens group, and a negative composite negative lens group. The composite positive lens group includes a positive third lens group G3, and is consisting of one or more lens groups having positive refractive power. The composite negative lens group includes a negative A lens group and a negative B lens group having negative refractive power. In the zoom lens, changing focal length is performed by varying distances between the lens groups, and a predetermined condition is satisfied.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: October 1, 2019
    Assignee: Tamron Co., Ltd.
    Inventor: Junichi Yamazoe
  • Publication number: 20190235210
    Abstract: An imaging lens according to the present invention includes a negative first lens, a meniscus-shaped negative second lens having a concave surface facing to an object side, a positive third lens, a positive fourth lens having a convex surface on the object side, a positive fifth lens, a negative sixth lens, and a positive seventh lens arranged in order from the object side. Furthermore, an imaging device according to the present invention includes the imaging lens.
    Type: Application
    Filed: September 25, 2018
    Publication date: August 1, 2019
    Applicant: TAMRON CO., LTD.
    Inventors: Seigo NAKAI, Yasuhiko OBIKANE
  • Patent number: 10359611
    Abstract: A zoom lens has in order from the object side, at least a foremost, first lens group having positive refractive power, a succeeding, second lens group having negative refractive power, a third lens group having positive refractive power, and a rearmost lens group having negative refractive power. The zoom lens meets requirements as defined in formulas regarding a displacement of the first lens group, a focal length of the zoom lens at the wide-angle end, a focal length of the zoom lens at the telephoto end, a focal length of the first lens group, and a focal length of the third lens group.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: July 23, 2019
    Assignee: TAMRON CO., LTD.
    Inventors: Yoshito Iwasawa, Jun Takahashi