Patents by Inventor Michio Cho

Michio Cho 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 and imaging apparatus
    Patent number: 9261685
    Abstract: A zoom lens substantially consists of a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged in order from the object side; that changes magnification by moving the first lens group and the second lens group; and wherein the first lens group is configured by a first lens having a negative refractive power, a second lens, a third lens having a negative refractive power, and a fourth lens having a positive refractive power, arranged in order from the object side. The zoom lens satisfies a predetermined conditional expression.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 16, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Hiroki Saito, Michio Cho, Toru Ito
  • ZOOM LENS AND IMAGING APPARATUS
    Publication number: 20160018630
    Abstract: A zoom lens is constituted essentially by six lens groups, in order from the object side to the image side: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a negative refractive power; and a sixth lens group having a positive refractive power. The distances between all pairs of adjacent lens groups change when changing magnification from the wide angle end to the telephoto end, and Conditional Formula (1) below is satisfied: ?5<f1/f2<?1.5??(1) wherein f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group.
    Type: Application
    Filed: September 18, 2015
    Publication date: January 21, 2016
    Inventors: Tetsuya ORI, Michio CHO
  • Imaging lens and imaging apparatus including the imaging lens
    Patent number: 9239446
    Abstract: An imaging lens substantially consists of, in order from an object side, five lenses of a first lens that has a positive refractive power and has a meniscus shape which is convex toward the object side, a second lens that has a negative refractive power, a third lens that has a negative refractive power, a fourth lens that has a positive refractive power, and a fifth lens that has a negative refractive power and has an object side surface and an image side surface which have aspheric shapes. Further, the imaging lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: January 19, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Kazuya Yoneyama, Michio Cho, Kazumi Koike
  • IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS
    Publication number: 20160011405
    Abstract: An imaging lens is constituted by six lenses, including, in order from the object side to the image side: a positive first lens having a convex surface toward the object side; a negative second lens; a positive third lens, which is a meniscus lens having a convex surface toward the object side; a positive fourth lens; a negative fifth lens having a concave surface toward the object side; and a negative sixth lens, of which the image toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof. Conditional formulae related to the focal length f of the entire lens system, the focal length f1 of the first lens, and the focal length f4 of the fourth lens is satisfied. 1.54<f/f4<3 0.
    Type: Application
    Filed: September 24, 2015
    Publication date: January 14, 2016
    Inventors: YOSHIKAZU SHINOHARA, KAZUYA YONEYAMA, MICHIO CHO, YOSHIAKI ISHII
  • IMAGING LENS AND IMAGING APPARATUS PROVIDED WITH THE SAME
    Publication number: 20160011406
    Abstract: An imaging lens consists of five lenses consisting of, in order from the object side, a biconvex first lens, a biconcave second lens, a positive third lens having a meniscus shape with the convex surface toward the image side, a positive fourth lens having a meniscus shape with the convex surface toward the image side, and a negative fifth lens having a concave surface toward the image side, and having at least one inflection point on the image-side surface thereof, wherein condition expression (1), 0<f/f3<0.6, relating to the focal length f of the entire system and the focal length f3 of the third lens, and condition expression (2), 0.12<D7/f<0.3, relating to the focal length f of the entire system and the distance D7 between the third lens and the fourth lens along the optical axis are satisfied.
    Type: Application
    Filed: September 24, 2015
    Publication date: January 14, 2016
    Inventors: NOBORU KOIZUMI, HIDEO KANDA, MICHIO CHO
  • Imaging lens and imaging apparatus equipped with the imaging lens
    Patent number: 9235200
    Abstract: An imaging lens substantially includes six lenses, constituted by: a first lens having a negative refractive power, which is of a meniscus shape having a concave surface toward an image side; a second lens; a third lens; a fourth lens; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power, a concave surface toward the image side, and at least one inflection point in the surface toward the image side; provided in this order from an object side. The imaging lens satisfies a predetermined conditional formula.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: January 12, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Yoshikazu Shinohara, Michio Cho
  • Imaging lens and imaging apparatus including the imaging lens
    Patent number: 9235028
    Abstract: An imaging lens substantially consists of, in order from an object side, five lenses of a first lens that has a positive refractive power and is convex toward the object side, a second lens that has a negative refractive power, a third lens, a fourth lens that has a positive refractive power, and a fifth lens that has a negative refractive power and has an object side surface and an image side surface which have aspheric shapes. Further, the imaging lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: January 12, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Kazuya Yoneyama, Michio Cho, Kazumi Koike
  • Imaging lens and imaging apparatus including the imaging lens
    Patent number: 9235029
    Abstract: An imaging lens substantially consists of, in order from an object side, five lenses of a first lens that has a positive refractive power and has a meniscus shape which is convex toward the object side, a second lens that has a negative refractive power and has a meniscus shape which is concave toward the object side, a third lens that has a meniscus shape which is convex toward the image side, a fourth lens that has a positive refractive power and is convex toward the object side, and a fifth lens that has a negative refractive power and has at least one inflection point on an image side surface.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: January 12, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Takayuki Noda, Michio Cho
  • Variable magnification optical system and imaging apparatus
    Patent number: 9235034
    Abstract: A variable magnification optical system substantially consists of a first lens-group having positive refractive-power, and which is fixed during magnification change, a second lens-group having negative refractive-power, a third lens-group having negative refractive-power, a fourth lens-group having negative refractive-power, an aperture stop, which is fixed during magnification change, and a fifth lens-group having positive refractive-power, and which is fixed during magnification change, in this order from an object-side along an optical-axis.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: January 12, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Shinkichi Ikeda, Michio Cho
  • IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS
    Publication number: 20160004045
    Abstract: An imaging lens is constituted of five lenses, including, in order from the object side to the image side: a first lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side; a second lens having a negative refractive power and a concave surface toward the image side; a third lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side; a fourth lens having a negative refractive power; and a fifth lens having a negative refractive power and at least one inflection point on the surface thereof toward the image side. Predetermined conditional formulae are satisfied.
    Type: Application
    Filed: September 17, 2015
    Publication date: January 7, 2016
    Inventors: Masato KONDO, Takayuki NODA, Tatsuyuki OGINO, Michio CHO
  • IMAGING LENS AND IMAGING APPARATUS PROVIDED WITH THE SAME
    Publication number: 20160004034
    Abstract: An imaging lens consists of five lenses consisting of, in order from the object side, a first lens having a positive refractive power and having a shape with a convex surface toward the object side, a second lens having a biconcave shape, a third lens having a biconvex shape, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power, having a shape with a concave surface toward the image side, and having at least one inflection point on the image-side surface thereof. The imaging lens satisfies a given condition expression.
    Type: Application
    Filed: September 10, 2015
    Publication date: January 7, 2016
    Inventors: SUMIHIRO NISHIHATA, MICHIO CHO
  • Zoom lens and imaging apparatus
    Patent number: 9229203
    Abstract: A zoom lens substantially consists of, in order from the object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a negative fifth lens group. When varying magnification, the distances between adjacent lens groups) are changed, while all of the lens groups are moved with respect to an image formation position. When focusing, only the fifth lens group is shifted, and the third lens group has a third-a lens group having positive refractive power and a third-b lens group having negative refractive power, which are arranged in this order from the object side, only the third-b lens group is moved in a direction perpendicular to the optical axis to achieve camera shake correction.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: January 5, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Takashi Tanaka, Michio Cho
  • Imaging lens and imaging apparatus
    Patent number: 9223120
    Abstract: An imaging lens includes: a positive first lens group; a positive second lens group which moves while focusing; and a third lens group. The first lens group includes a positive lens having a convex surface with a radius of curvature having a small absolute value toward the image side, a positive biconvex lens, a negative lens having a concave surface with a radius of curvature having a small absolute value toward the object side, and a positive lens having a convex surface with a radius of curvature having a small absolute value toward the object side, in this order from the object side. The second lens group includes a positive lens having a convex surface with a radius of curvature having a small absolute value toward the object side. The third lens group includes two positive lenses and one negative lens. The imaging lens satisfies a predetermined conditional formula.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: December 29, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Ukyo Tomioka, Michio Cho
  • ZOOM LENS AND IMAGING APPARATUS
    Publication number: 20150370041
    Abstract: A zoom lens includes, in order from the object side, a positive first group, a negative second group, a stop, a positive third group, a negative fourth group, and a positive fifth group. During magnification change from the wide-angle end to the telephoto end, the first to fourth groups are moved to always increase the distance between the first and second groups, always decrease the distance between the second and third groups, and change the distance between the third and fourth groups and the distance between the fourth and fifth groups. The third group includes, in order from the object side, at least a positive lens, a positive lens, a negative lens, and a positive lens, and satisfies condition expression (1) below: 25<?dD??dA<70??(1), where ?dA and ?dD are Abbe numbers at the d-line of the most object-side lens A and the most image-side lens D.
    Type: Application
    Filed: May 26, 2015
    Publication date: December 24, 2015
    Inventors: Taiga NODA, Michio CHO
  • Zoom lens and imaging apparatus
    Patent number: 9217850
    Abstract: A zoom lens includes: a first lens group having a negative refractive power; and a second lens group having a positive refractive power, provided in this order from an object side. Magnification is changed by moving the first lens group and the second lens group. The first lens group includes a first lens having a negative refractive power, a second lens, a third lens having a negative refractive power, and a fourth lens having a positive refractive power, provided in this order from the object side. The zoom lens satisfies predetermined conditional formulae.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: December 22, 2015
    Assignee: FUJIFILM CORPORATION
    Inventors: Hiroki Saito, Michio Cho, Toru Ito
  • Imaging lens and imaging device provided with the same
    Patent number: 9207432
    Abstract: An imaging lens substantially consists of five lenses consisting of, in order from the object side: a first lens having a positive refractive power and having a meniscus shape with a convex surface toward the object side; a second lens having a biconcave shape; a third lens having a positive refractive power and having a meniscus shape with a convex surface toward the image side; a fourth lens having a meniscus shape with a convex surface toward the image side; and a fifth lens having a negative refractive power and having a concave surface toward the object side.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: December 8, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Takuya Tanaka, Tatsuro Iwasaki, Michio Cho
  • Imaging lens and imaging apparatus equipped with the imaging lens
    Patent number: 9201218
    Abstract: An imaging lens is substantially constituted by five lenses, including: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a negative refractive power; a fifth lens having a negative refractive power and an inflection point on the surface thereof toward the image side. All of the first lens through the fifth lens are single lenses, and the imaging lens satisfies predetermined conditional formulae.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: December 1, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Takayuki Noda, Michio Cho
  • IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS
    Publication number: 20150309287
    Abstract: An imaging lens consists of five lenses, including: a first lens having a positive refractive power and a meniscus shape with a convex surface toward the object side, a second lens having a biconcave shape with the surface having the radius of curvature with the smaller absolute value toward the image side, a third lens having a meniscus shape with a convex surface toward the object side, a fourth lens having a negative refractive power and a meniscus shape with a convex surface toward the image side, and a fifth lens having a negative refractive power and a meniscus shape with a concave surface toward the image side, the image-side surface thereof having at least one inflection point, disposed in this order from the object side.
    Type: Application
    Filed: June 23, 2015
    Publication date: October 29, 2015
    Inventors: MASATO KONDO, MICHIO CHO
  • ZOOM LENS AND IMAGING APPARATUS
    Publication number: 20150309290
    Abstract: A five-group zoom lens including, in order from the object side, positive, negative, negative, positive, and positive groups. The first group includes a negative meniscus lens with the concave surface toward the image side, a positive lens and a positive lens. The second group includes a negative lens with the image-side surface having an absolute value of curvature radius smaller than that of the object side surface, a biconcave lens, and a biconvex lens. The third group includes a negative lens with the object side surface having an absolute value of curvature radius smaller than that of the image-side surface, and is moved during focusing on a closer object. The fifth group includes a positive fifth-A group including a biconvex lens, and a negative fifth-B group including a biconcave lens and a biconvex lens, wherein condition expression (1) is satisfied: 0.22<fW/f1<0.27??(1).
    Type: Application
    Filed: April 20, 2015
    Publication date: October 29, 2015
    Inventors: Tetsuya ORI, Michio CHO
  • ZOOM LENS AND IMAGING APPARATUS
    Publication number: 20150309291
    Abstract: A five-group zoom lens including, in order from the object side, positive, negative, negative, positive, and positive groups. The first group includes a negative meniscus lens with the concave surface toward the image side, a positive lens and a positive lens. The second group includes a negative lens with the image-side surface having an absolute value of curvature radius smaller than that of the object side surface, a biconcave lens, and a biconvex lens. The third group includes a negative lens with the object side surface having an absolute value of curvature radius smaller than that of the image-side surface, and is moved during focusing on a closer object. The fifth group includes a positive fifth-A group including a biconvex lens, and a negative fifth-B group including a biconcave lens and a biconvex lens, wherein condition expression (1) is satisfied: ?4<f5/f5B<?0.7??(1).
    Type: Application
    Filed: April 20, 2015
    Publication date: October 29, 2015
    Inventors: Tetsuya ORI, Michio CHO