Patents by Inventor Tomoharu Fujiwara

Tomoharu Fujiwara 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).

  • Publication number: 20230355089
    Abstract: An image signal output device including an acquisition section configured to acquire a fundus image, a selection section configured to select a projection for displaying the acquired fundus image from plural projections, a conversion section configured to convert the fundus image into the selected projection, and a processing section configured to output an image signal of the converted fundus image.
    Type: Application
    Filed: July 19, 2023
    Publication date: November 9, 2023
    Applicant: NIKON CORPORATION
    Inventors: Yasushi TANABE, Tomoharu FUJIWARA, Mariko HIROKAWA
  • Publication number: 20230320584
    Abstract: Predicting a non perfusion area. An enhancement image processing section performs enhancement image processing on a fundus image of a subject eye to enhance vascular portions (304). A prediction processing section predicts a non perfusion area in the fundus image that has been subjected to the enhancement image processing (306 to 312). A generation section generates a non perfusion area candidate image (314).
    Type: Application
    Filed: June 14, 2023
    Publication date: October 12, 2023
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE, Tomoharu FUJIWARA
  • Patent number: 11744455
    Abstract: An image signal output device including an acquisition section configured to acquire a fundus image, a selection section configured to select a projection for displaying the acquired fundus image from plural projections, a conversion section configured to convert the fundus image into the selected projection, and a processing section configured to output an image signal of the converted fundus image.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: September 5, 2023
    Assignee: NIKON CORPORATION
    Inventors: Yasushi Tanabe, Tomoharu Fujiwara, Mariko Hirokawa
  • Patent number: 11712160
    Abstract: Predicting a non perfusion area. An enhancement image processing section performs enhancement image processing on a fundus image of a subject eye to enhance vascular portions (304). A prediction processing section predicts a non perfusion area in the fundus image that has been subjected to the enhancement image processing (306 to 312). A generation section generates a non perfusion area candidate image (314).
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: August 1, 2023
    Assignee: NIKON CORPORATION
    Inventors: Mariko Hirokawa, Yasushi Tanabe, Tomoharu Fujiwara
  • Patent number: 11419495
    Abstract: An image processing method, which is executed by a processor, comprises acquiring choroid information from an image of a fundus of an examined eye, and comparing the choroid information against a choroid normative database and determining whether or not there is an abnormality in the fundus.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: August 23, 2022
    Assignee: NIKON CORPORATION
    Inventors: Mariko Hirokawa, Yasushi Tanabe, Tomoharu Fujiwara
  • Patent number: 11284791
    Abstract: A visualization of choroidal blood vessel size is created. A vortex vein position is detected from a choroidal vascular image in which choroidal blood vessels have been visualized. Image processing is employed on the choroidal vascular image to extract first size choroidal blood vessels of a first size and to extract second size choroidal blood vessels of a second size different to the first size from the choroidal vascular image. A size analysis fundus image is generated in which a rectangular frame indicating the vortex vein position is displayed superimposed on the choroidal vascular image, and in which the first size choroidal blood vessels are displayed in red and the second size choroidal blood vessels are displayed in blue.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: March 29, 2022
    Assignee: NIKON CORPORATION
    Inventors: Yasushi Tanabe, Tomoharu Fujiwara
  • Patent number: 11170213
    Abstract: There is provided an ocular image capturing device comprising an ocular image generating module operable to generate an image of a subject's eye based on light reflected from the eye, and a determination module arranged to determine whether or not at least a portion of a pupil region of the generated image is within a predetermined permissible region within the generated image, and to generate a signal that is indicative of the determination, the pupil region being an image of at least a portion of the pupil of the eye.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: November 9, 2021
    Assignee: OPTOS PLC
    Inventors: Alan Anderson, Praveen Ashok, Tomoharu Fujiwara, Yasushi Tanabe, Hiroshi Kintou, Mariko Hirokawa, Tadashi Umezaki
  • Publication number: 20210127970
    Abstract: An image processing method, which is executed by a processor, comprises acquiring choroid information from an image of a fundus of an examined eye, and comparing the choroid information against a choroid normative database and determining whether or not there is an abnormality in the fundus.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 6, 2021
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE, Tomoharu FUJIWARA
  • Publication number: 20210022600
    Abstract: A visualization of choroidal blood vessel size is created. A vortex vein position is detected from a choroidal vascular image in which choroidal blood vessels have been visualized. Image processing is employed on the choroidal vascular image to extract first size choroidal blood vessels of a first size and to extract second size choroidal blood vessels of a second size different to the first size from the choroidal vascular image. A size analysis fundus image is generated in which a rectangular frame indicating the vortex vein position is displayed superimposed on the choroidal vascular image, and in which the first size choroidal blood vessels are displayed in red and the second size choroidal blood vessels are displayed in blue.
    Type: Application
    Filed: October 15, 2020
    Publication date: January 28, 2021
    Applicant: NIKON CORPORATION
    Inventors: Yasushi TANABE, Tomoharu FUJIWARA
  • Publication number: 20200359888
    Abstract: Predicting a non perfusion area. An enhancement image processing section performs enhancement image processing on a fundus image of a subject eye to enhance vascular portions (304). A prediction processing section predicts a non perfusion area in the fundus image that has been subjected to the enhancement image processing (306 to 312). A generation section generates a non perfusion area candidate image (314).
    Type: Application
    Filed: December 28, 2017
    Publication date: November 19, 2020
    Applicant: NIKON CORPORATION
    Inventors: Mariko HIROKAWA, Yasushi TANABE, Tomoharu FUJIWARA
  • Patent number: 10761431
    Abstract: A mirror array device, and related exposure apparatus and manufacturing method, for driving a spatial light modulator that includes: setting, in an array of mirror elements, mirror elements in a first state for turning incident light into reflected light with the same phase as that of the incident light or with a phase different by a first phase from that of the incident light and mirror elements in a second state for turning incident light into reflected light with a phase different approximately 180° from the first phase to an arrangement with a first phase distribution; and setting, in the array of mirror elements, the first mirror elements and the second mirror elements to an arrangement with a second phase distribution which is an inversion of the first phase distribution.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: September 1, 2020
    Assignee: NIKON CORPORATION
    Inventors: Yoji Watanabe, Soichi Owa, Tomoharu Fujiwara
  • Publication number: 20200237208
    Abstract: An image signal output device including an acquisition section configured to acquire a fundus image, a selection section configured to select a projection for displaying the acquired fundus image from plural projections, a conversion section configured to convert the fundus image into the selected projection, and a processing section configured to output an image signal of the converted fundus image.
    Type: Application
    Filed: July 30, 2018
    Publication date: July 30, 2020
    Applicant: NIKON CORPORATION
    Inventors: Yasushi TANABE, Tomoharu FUJIWARA, Mariko HIROKAWA
  • Patent number: 10598606
    Abstract: A method for inspecting a spatial light modulator includes: performing such control that in an inspection target area in an array of mirror elements, the mirror elements in a first state in which incident light is given a phase change amount of 0 and the mirror elements in a second state in which incident light is given a phase change amount of 180° (?) become arrayed in a checkered pattern; guiding light having passed the inspection target area to a projection optical system with a resolution limit coarser than a width of an image of one mirror element, to form a spatial image; and inspecting a characteristic of the spatial light modulator from the spatial image. This method allows us to readily perform the inspection of the characteristic of the spatial light modulator having the array of optical elements.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: March 24, 2020
    Assignee: NIKON CORPORATION
    Inventor: Tomoharu Fujiwara
  • Patent number: 10557801
    Abstract: A method for inspecting a spatial light modulator includes: performing such control that in an inspection target area in an array of mirror elements, the mirror elements in a first state in which incident light is given a phase change amount of 0 and the mirror elements in a second state in which incident light is given a phase change amount of 180° (?) become arrayed in a checkered pattern; guiding light having passed the inspection target area to a projection optical system with a resolution limit coarser than a width of an image of one mirror element, to form a spatial image; and inspecting a characteristic of the spatial light modulator from the spatial image. This method allows us to readily perform the inspection of the characteristic of the spatial light modulator having the array of optical elements.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: February 11, 2020
    Assignee: NIKON CORPORATION
    Inventor: Tomoharu Fujiwara
  • Patent number: 10495977
    Abstract: A spatial light modulator includes a first reflective surface which reflects incident light and is movable between a first position and a second position, the first and the second positions being located along a first axis, a second reflective surface which reflects the incident light, is arranged at a position where the second reflective surface is adjacent to the first reflective surface in a direction along a second axis crossing the first axis, and is movable between a third position and a fourth position, the third and the fourth positions being located along a direction parallel to the first axis, and a reflective part which reflects the incident light and is arranged between the first reflective surface and the second reflective surface in the direction along the second axis, wherein a distance between the first position and the reflective part, defined in the direction parallel to the first axis, is configured to attenuate light reflected at the reflective part by using light reflected at the first re
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: December 3, 2019
    Assignee: Nikon Corporation
    Inventors: Soichi Owa, Yoji Watanabe, Tomoharu Fujiwara
  • Patent number: 10461039
    Abstract: A mark forming method includes: forming recessed portion on a mark formation area of a substrate; coating the recessed portion with a polymer layer containing a block copolymer, allowing the polymer layer in the recessed portion to form a self-assembled area; selectively removing a portion of the self-assembled area; and forming a positioning mark by using the self-assembled area from which the portion thereof has been removed.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: October 29, 2019
    Assignee: NIKON CORPORATION
    Inventors: Yuji Shiba, Tomoharu Fujiwara, Nobutaka Magome
  • Publication number: 20190293568
    Abstract: A method for inspecting a spatial light modulator includes: performing such control that in an inspection target area in an array of mirror elements, the mirror elements in a first state in which incident light is given a phase change amount of 0 and the mirror elements in a second state in which incident light is given a phase change amount of 180° (?) become arrayed in a checkered pattern; guiding light having passed the inspection target area to a projection optical system with a resolution limit coarser than a width of an image of one mirror element, to form a spatial image; and inspecting a characteristic of the spatial light modulator from the spatial image. This method allows us to readily perform the inspection of the characteristic of the spatial light modulator having the array of optical elements.
    Type: Application
    Filed: April 22, 2019
    Publication date: September 26, 2019
    Inventor: Tomoharu FUJIWARA
  • Publication number: 20190278972
    Abstract: There is provided an ocular image capturing device comprising an ocular image generating module operable to generate an image of a subject's eye based on light reflected from the eye, and a determination module arranged to determine whether or not at least a portion of a pupil region of the generated image is within a predetermined permissible region within the generated image, and to generate a signal that is indicative of the determination, the pupil region being an image of at least a portion of the pupil of the eye.
    Type: Application
    Filed: October 10, 2017
    Publication date: September 12, 2019
    Inventors: Alan ANDERSON, Praveen ASHOK, Tomoharu FUJIWARA, Yasushi TANABE, Hiroshi KINTOU, Mariko HIROKAWA, Tadashi UMEZAKI
  • Publication number: 20190271917
    Abstract: A mirror array device, and related exposure apparatus and manufacturing method, for driving a spatial light modulator that includes: setting, in an array of mirror elements, mirror elements in a first state for turning incident light into reflected light with the same phase as that of the incident light or with a phase different by a first phase from that of the incident light and mirror elements in a second state for turning incident light into reflected light with a phase different approximately 180° from the first phase to an arrangement with a first phase distribution; and setting, in the array of mirror elements, the first mirror elements and the second mirror elements to an arrangement with a second phase distribution which is an inversion of the first phase distribution.
    Type: Application
    Filed: May 13, 2019
    Publication date: September 5, 2019
    Applicant: NIKON CORPORATION
    Inventors: Yoji WATANABE, Soichi OWA, Tomoharu FUJIWARA
  • Patent number: 10338479
    Abstract: A method of driving a spatial light modulator includes: setting, in an array of mirror elements, mirror elements in a first state for turning incident light into reflected light with the same phase as that of the incident light or with a phase different by a first phase from that of the incident light and mirror elements in a second state for turning incident light into reflected light with a phase different approximately 180° from the first phase to an arrangement with a first phase distribution; and setting, in the array of mirror elements, the first mirror elements and the second mirror elements to an arrangement with a second phase distribution which is an inversion of the first phase distribution.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: July 2, 2019
    Assignee: NIKON CORPORATION
    Inventors: Yoji Watanabe, Soichi Owa, Tomoharu Fujiwara