Patents by Inventor Masaru Yonezawa

Masaru Yonezawa 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: 11327280
    Abstract: The zoom lens consists of, in order from the object side, a positive first lens group that does not move during zooming, a negative second lens group that moves during zooming, a negative third lens group that moves during zooming, at least one lens group that moves during zooming, and a rear group that does not move during zooming. All distances between the lens groups adjacent to each other change during zooming. The zoom lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: May 10, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Motoari Ota, Masaru Yonezawa, Takuya Tanaka
  • Patent number: 11280987
    Abstract: The zoom lens, in order from the object side, a positive first lens group that does not move during zooming, a negative second lens group that moves during zooming, a negative third lens group that moves during zooming, at least one lens group that moves during zooming, and a rear group that does not move during zooming. All distances between the lens groups adjacent to each other change during zooming. The zoom lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: March 22, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Motoari Ota, Masaru Yonezawa, Takuya Tanaka
  • Patent number: 11187877
    Abstract: A zoom lens consists of, in order from an object side, a focusing group, a zoom group, and a subsequent group. The focusing group consists of, in order from the object side, a front focusing group which does not move with respect to the image plane during zooming and focusing, a middle focusing group which consists of one or two positive lens groups each moving during focusing, and a rear focusing group which consists of a negative lens group moving during zooming and focusing. The rear focusing group has a zoom range in which the amount of movement during focusing changes in accordance with the zoom position and the rear focusing group moves to the image side during focusing from the object at infinity to the closest object. Predetermined conditional expressions relating to the amount of movement of the rear focusing group are satisfied.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: November 30, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Yonezawa, Motoari Ota
  • Patent number: 11125983
    Abstract: The zoom lens consists of, in order from an object side: a positive first lens group that does not move during zooming; a middle group that consists of two or more movable lens groups moving during zooming; and a subsequent group that has a lens group including a stop at a position closest to the object side. The middle group has at least two negative movable lens groups. The subsequent group includes at least one positive LA lens that satisfies predetermined conditional expressions relating to the refractive index, the Abbe number, and the partial dispersion ratio.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: September 21, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Yonezawa, Daiki Komatsu, Takashi Kunugise
  • Patent number: 11106021
    Abstract: The zoom lens consists of, in order from an object side: a positive first lens group that does not move during zooming; a middle group that consists of two or more movable lens groups moving during zooming; and a subsequent group that has a lens group including a stop at a position closest to the object side. The middle group has at least two negative movable lens groups. At least one negative movable lens group in the middle group includes at least one negative LN lens which satisfies predetermined conditional expressions relating to the refractive index, the Abbe number, and the partial dispersion ratio.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: August 31, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Yonezawa, Daiki Komatsu, Takashi Kunugise
  • Publication number: 20210088763
    Abstract: A zoom lens consists of, in order from an object side, a positive first lens group, a negative moving lens group, a first positive moving lens group, a second positive moving lens group, and a subsequent lens group including a stop. During zooming, the first lens group is not moved, and the negative moving lens group, the first positive moving lens group, and the second positive moving lens group are moved. The first positive moving lens group consists of a positive single lens and a cemented lens obtained by cementing a positive lens and a negative lens. The zoom lens satisfies a predetermined conditional expression.
    Type: Application
    Filed: September 10, 2020
    Publication date: March 25, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Masaru YONEZAWA, Motoari OTA
  • Patent number: 10852535
    Abstract: The imaging lens includes at least one negative lens that satisfies predetermined Conditional Expressions (1) to (3) indicating conditions in which dispersion is relatively low and refractive index is high while having a negative rate of change of the refractive index. A positive lens having a largest Abbe number at the d line among positive lenses included in the imaging lens satisfies predetermined Conditional Expressions (4) and (5).
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: December 1, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Yukiko Nagatoshi, Shunsuke Miyagishima, Kazuyoshi Okada, Ukyo Tomioka, Masaru Yonezawa, Yasutaka Shimada
  • Patent number: 10809504
    Abstract: The zoom lens consists of, in order from an object side: a first lens group (G1) that remains stationary during zooming and has a positive refractive power; and a subsequent section that consists of five or more lens groups including at least four movable lens groups. The first lens group (G1) is set as an A constituent section (SA), and a lens closest to the object side in the A constituent section (SA) has a negative refractive power. A lens group having a stop is set as a C constituent section (SC), and the C constituent section (SC) moves to the object side during zooming from a wide-angle end to a telephoto end, and then moves toward an image side. A spacing between the A constituent section (SA) and the C constituent section (SC) is set as a B constituent section (SB), and the B constituent section (SB) consists of one or two the movable lens groups, and has a negative refractive power. In addition, the zoom lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: October 20, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Amano, Masaru Yonezawa
  • Patent number: 10641986
    Abstract: The zoom lens includes, in order from the object side: a first lens group G1 that has a positive refractive power and remains stationary during zooming; a plurality of movable lens groups that move by changing distances between groups adjacent to each other in a direction of an optical axis during zooming; and a final lens group Ge that has a positive refractive power and remains stationary during zooming. At least one movable lens group has a negative refractive power. The first lens group G1 has an image side positive lens, which is a positive lens disposed to be closest to the image side, and one or more positive lenses which are disposed to be closer to the object side than the image side positive lens. The zoom lens satisfies predetermined conditional expressions relating to the image side positive lens.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: May 5, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Yonezawa, Shinkichi Ikeda
  • Patent number: 10642008
    Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a positive refractive power and remains stationary during zooming, a plurality of movable lens groups that move during zooming, and a final lens group that has a positive refractive power and remains stationary during zooming. The first lens group consists of, in order from the object side, a first lens group front group that has a negative refractive power, a first lens group intermediate group that has a positive refractive power and moves during focusing, and a first lens group rear group that has a positive refractive power. The first lens group front group has, successively in order from a position closest to the object side, a negative meniscus lens concave toward an image side, and a negative lens concave toward the object side. The components of the zoom lens satisfy predetermined conditional expressions.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: May 5, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Yonezawa, Shinkichi Ikeda
  • Patent number: 10620399
    Abstract: Provided are a zoom lens which can be configured to have a small size while ensuring a high zoom ratio and has high optical performance by satisfactorily correcting chromatic aberration, and an imaging apparatus including the zoom lens. The zoom lens consists of, in order from the object side, a first lens group G1 that has a positive refractive power and remains stationary during zooming, a plurality of movable lens groups that move during zooming; and a final lens group Ge that has a positive refractive power and remains stationary during zooming. At least one movable lens group has a negative refractive power. The movable lens group, which is closest to the object side and has a negative refractive power, has two or more negative lenses, and satisfies predetermined conditional expressions.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: April 14, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Yonezawa, Shinkichi Ikeda
  • Publication number: 20200064604
    Abstract: A zoom lens consists of, in order from an object side, a focusing group, a zoom group, and a subsequent group. The focusing group consists of, in order from the object side, a front focusing group which does not move with respect to the image plane during zooming and focusing, a middle focusing group which consists of one or two positive lens groups each moving during focusing, and a rear focusing group which consists of a negative lens group moving during zooming and focusing. The rear focusing group has a zoom range in which the amount of movement during focusing changes in accordance with the zoom position and the rear focusing group moves to the image side during focusing from the object at infinity to the closest object. Predetermined conditional expressions relating to the amount of movement of the rear focusing group are satisfied.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 27, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Masaru YONEZAWA, Motoari OTA
  • Publication number: 20200064603
    Abstract: The zoom lens consists of, in order from an object side: a positive first lens group that does not move during zooming; a middle group that consists of two or more movable lens groups moving during zooming; and a subsequent group that has a lens group including a stop at a position closest to the object side. The middle group has at least two negative movable lens groups. The subsequent group includes at least one positive LA lens that satisfies predetermined conditional expressions relating to the refractive index, the Abbe number, and the partial dispersion ratio.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 27, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Masaru YONEZAWA, Daiki KOMATSU, Takashi KUNUGISE
  • Publication number: 20200064606
    Abstract: The zoom lens consists of, in order from the object side, a positive first lens group that does not move during zooming, a negative second lens group that moves during zooming, a negative third lens group that moves during zooming, at least one lens group that moves during zooming, and a rear group that does not move during zooming. All distances between the lens groups adjacent to each other change during zooming. The zoom lens satisfies predetermined conditional expressions.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 27, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Motoari OTA, Masaru YONEZAWA, Takuya TANAKA
  • Publication number: 20200064602
    Abstract: The zoom lens, in order from the object side, a positive first lens group that does not move during zooming, a negative second lens group that moves during zooming, a negative third lens group that moves during zooming, at least one lens group that moves during zooming, and a rear group that does not move during zooming. All distances between the lens groups adjacent to each other change during zooming. The zoom lens satisfies predetermined conditional expressions.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 27, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Motoari OTA, Masaru YONEZAWA, Takuya TANAKA
  • Publication number: 20200064601
    Abstract: The zoom lens consists of, in order from an object side: a positive first lens group that does not move during zooming; a middle group that consists of two or more movable lens groups moving during zooming; and a subsequent group that has a lens group including a stop at a position closest to the object side. The middle group has at least two negative movable lens groups. At least one negative movable lens group in the middle group includes at least one negative LN lens which satisfies predetermined conditional expressions relating to the refractive index, the Abbe number, and the partial dispersion ratio.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 27, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Masaru YONEZAWA, Daiki KOMATSU, Takashi KUNUGISE
  • Patent number: 10444479
    Abstract: The zoom lens consists of, in order from an object side: a first lens group that has a positive refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; a fourth lens group; and a fifth lens group that has a positive refractive power. The first lens group and the fifth lens group remain stationary with respect to an image plane during zooming. The second lens group, the third lens group, and the fourth lens group are moved by changing distances between the lens groups and adjacent groups in a direction of an optical axis during zooming, and are positioned to be closer to the image side at a telephoto end than at a wide-angle end. Conditional Expression (1) is satisfied. 0.8<pr1/f1<2.6??(1).
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: October 15, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Takuya Tanaka, Masaru Yonezawa
  • Publication number: 20190094533
    Abstract: The imaging lens includes at least one negative lens that satisfies predetermined Conditional Expressions (1) to (3) indicating conditions in which dispersion is relatively low and refractive index is high while having a negative rate of change of the refractive index. A positive lens having a largest Abbe number at the d line among positive lenses included in the imaging lens satisfies predetermined Conditional Expressions (4) and (5).
    Type: Application
    Filed: September 17, 2018
    Publication date: March 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Yukiko NAGATOSHI, Shunsuke MIYAGISHIMA, Kazuyoshi OKADA, Ukyo TOMIOKA, Masaru YONEZAWA, Yasutaka SHIMADA
  • Patent number: 10168514
    Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a positive refractive power and remains stationary during zooming, a plurality of movable lens groups that move during zooming, and a final lens group that has a positive refractive power and remains stationary during zooming. The first lens group consists of, in order from the object side, a first lens group front group that has a negative refractive power and remains stationary during focusing, a first lens group intermediate group that has a positive refractive power and moves during focusing, and a first lens group rear group that has a positive refractive power. The first lens group front group has, successively in order from a position closest to the object side, a negative meniscus lens that is concave toward the image side and a negative lens.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: January 1, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Masaru Yonezawa, Takuya Tanaka
  • Patent number: 10168513
    Abstract: The zoom lens consists of, in order from an object side: a first lens group that has a positive refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; a fourth lens group that has a positive refractive power; and a fifth lens group that has a positive refractive power. The first lens group and the fifth lens group remain stationary with respect to an image plane during zooming. The second lens group, the third lens group, and the fourth lens group are moved by changing distances between the lens groups and adjacent groups in a direction of an optical axis during zooming, and are positioned to be closer to the image side at a telephoto end than at a wide-angle end. A stop is provided between the fourth lens group and the fifth lens group. In addition, Conditional Expression (1) is satisfied. 0.1<fw/f4<0.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: January 1, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Takuya Tanaka, Masaru Yonezawa