Patents Assigned to Nidek Co., Ltd.
  • Publication number: 20260137273
    Abstract: A fundus imaging device has a fixation optical system, an OCT optical system, an imaging optical system, and a controller. The controller is configured to acquire a focus evaluation value based on a slit image formed by slit-shaped illumination light on a two-dimensional imaging element of the imaging optical system in a case where an optical scanner of the imaging optical system deflects in a predetermined direction. The controller is configured to perform diopter correction control of the OCT optical system by driving a first focus adjustment unit of the OCT optical system based on the focus evaluation value.
    Type: Application
    Filed: September 23, 2025
    Publication date: May 21, 2026
    Applicant: NIDEK CO., LTD.
    Inventors: Shinya IWATA, Masayuki YOSHINO, Junpei NISHIYAMA
  • Patent number: 12632956
    Abstract: A processor of a fundus image processing device acquires a fundus image 50 photographed by a fundus image photographing device. The processor acquires blood vessel images 60A and 60B that indicate at least one of an arteriole and a venule in the fundus image 50 by inputting the fundus image 50 into a mathematical model trained by a machine learning algorithm. The processor acquires a blood vessel area that is an area of at least one of the arteriole and the venule in the whole of the blood vessel images 60A and 60B.
    Type: Grant
    Filed: May 27, 2022
    Date of Patent: May 19, 2026
    Assignees: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, NIDEK CO., LTD.
    Inventors: Michiyuki Saito, Kousuke Noda, Kanae Fukutsu, Susumu Ishida, Ryosuke Shiba, Yoshiki Kumagai
  • Patent number: 12633012
    Abstract: An ophthalmic information processing method includes: acquiring first distribution data representing two-dimensional distribution of first measurement data of examinee's eye-tissue; acquiring second distribution data representing two-dimensional distribution of second measurement data of a measurement target different from that of the first measurement data in the examinee's eye tissue, the two-dimensional distribution being related to a region overlapping with that of the first distribution data; generating a first isoline map in which pixels in a closed section enclosed by an isoline are filled with a color or density level in accordance with a value of the first measurement data, the first isoline map representing the first distribution data; generating a wireframe second isoline map in which a closed section enclosed by adjacent isolines are not filled, the second isoline map representing the second distribution data; and generating a superimposed map by superimposing the first isoline map and the second
    Type: Grant
    Filed: August 3, 2023
    Date of Patent: May 19, 2026
    Assignee: NIDEK CO., LTD.
    Inventor: Yoshiyuki Yamada
  • Publication number: 20260060532
    Abstract: A subjective optometry system includes a target presentation unit which presents an examination visual target to a subject eye, a correction unit which changes an optical characteristic of a target light flux emitted from the target presentation unit, a self-optometry program setting unit which sets either a first self-optometry program that automatically proceeds with examination items for the subject eye based on a response input by an examinee, or a second self-optometry program that automatically proceeds with examination items for the subject eye based on a response input by the examinee, and a control unit which controls, based on the first self-optometry program or the second self-optometry program set by the self-optometry program setting unit, at least one of the target presentation unit and the correction unit to advance an optometry according to a procedure of the first self-optometry program or the second self-optometry program.
    Type: Application
    Filed: August 22, 2023
    Publication date: March 5, 2026
    Applicant: NIDEK CO., LTD.
    Inventors: Taeko HORINO, Arisa SHIMAZAKI
  • Publication number: 20260053350
    Abstract: An ophthalmic apparatus has an examination window, a first optical system which projects a first pattern index with visible light onto a subject eye from an outside of the examination window, a second optical system which projects a second pattern index with infrared light onto the subject eye from an inside of the examination window, an imaging optical system including an imaging element which receives a first cornea reflection image caused by the first pattern index and a second cornea reflection image caused by the second pattern index via an objective lens, and a coupler which couples optical paths of the imaging optical system and the second optical system. The coupler is an optical element having a characteristic in which an attenuation ratio of the visible light is smaller than that of the infrared light in an optical path from a cornea of the subject eye toward the imaging element.
    Type: Application
    Filed: August 13, 2025
    Publication date: February 26, 2026
    Applicant: NIDEK CO., LTD.
    Inventor: Seiji MASEGI
  • Patent number: 12507884
    Abstract: An ophthalmic apparatus includes a tester having a target projecting optical system and a target photographing optical system. with a configuration on an examinee's eye side being non-telecentric, an alignment adjuster that adjusts at least a positional relationship between an examinee's eye and the tester in the direction of a working distance between the examinee's eye and the tester, and a corrector that acquires an actual error from a proper working distance based on association information indicating the association of position information on the positions of first and second target images on an observation image with an error in the working distance with respect to the proper working distance due to the corneal curvature radius of the examinee's eye and the non-telecentricity of the target photographing optical system and the position information on the tester at the current position thereof in the working distance direction, correcting the actual error.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: December 30, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Megumi Tsuchiya, Kenji Nakamura
  • Patent number: 12490898
    Abstract: An ophthalmic system for examining a subject eye of an examinee includes a plurality of examination units, a robot mechanism, and a controller. The plurality of examination units have housings different from each other, perform examinations different from each other, and include at least a first examination unit and a second examination unit. The robot mechanism has a holding unit that holds and releases either the first examination unit or the second examination unit, and a moving unit that is connected to the holding unit and moves three-dimensionally. A controller controls driving of the robot mechanism to adjust a relative positional relationship between the subject eye and the first examination unit or the second examination unit held by the holding unit. The first examination unit or the second examination unit is replaced to be held by the holding unit for performing a different examination on the subject eye.
    Type: Grant
    Filed: March 29, 2023
    Date of Patent: December 9, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Naoki Takeno, Yasuhiro Furuuchi, Shinya Mito, Kouji Hamaguchi
  • Patent number: 12440097
    Abstract: An OCT device includes an OCT optical system and a controller that also serves as an image processor. The controller acquires the OCT data of the fundus by processing the spectral interference signal output from the OCT optical system. In addition, the controller adjusts the position of the high accuracy region, which is the depth region where relatively high accuracy OCT data is obtained, by controlling the OCT optical system in accordance with the curvature level of the fundus image in the photographing range of the OCT data. This makes it possible to acquire good OCT data regardless of the curvature level of the fundus.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: October 14, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Ai Takaya, Norimasa Satake, Yukihiro Higuchi
  • Patent number: 12435467
    Abstract: A dyeing system includes a conveyance device, a reader, a dye fixing device, and a controller. The conveyance device conveys a conveyance unit including the resin body. The reader reads information relating to the conveyance unit. The dye fixing device heats the resin body in the conveyance unit conveyed by the conveyance device and fixes a dye adhering to a surface of the resin body, on the resin body. The controller acquires a parameter for a process executed to the resin body in the conveyance unit, based on the information read by the reader. The controller controls the dye fixing device based on the acquired parameter.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: October 7, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Ryoji Shibata, Minoru Inuzuka, Koji Abe, Motoshi Tanaka
  • Publication number: 20250302298
    Abstract: An ophthalmic measurement device is provided and includes: a measurement optical system, projecting measurement light onto a fundus of an eye to be examined and receive a reflected light from the fundus by a light receiving element; a conversion member, arranged at a pupil conjugate position of the eye to be examined in the measurement optical system, converting the reflected light into multiple ring images; a limiting part, including a limiting member arranged at a conjugate position of the conversion member or in the vicinity of the conversion member, and changing a measurement region on the eye to be examined by limiting some of the ring images with the limiting member; a limiting controller, controlling the limiting part and causing the measurement region to change in at least two patterns; and a processor, processing the ring images and obtaining eye refractive power information.
    Type: Application
    Filed: June 17, 2025
    Publication date: October 2, 2025
    Applicant: NIDEK CO., LTD.
    Inventors: Michihiro Takii, Mikio Kurachi, Naoki Isogai, Hiroshi Ohta
  • Publication number: 20250275677
    Abstract: An ophthalmic device for measuring a cornea shape of an examinee's eye includes a measurement pattern index plate on which a pattern index for measuring the cornea shape of the examinee's eye is formed, and a surface light emitting panel in a flat plate shape that illuminates the measurement pattern index plate from behind to project the pattern index onto the cornea of the examinee's eye. The surface light emitting panel includes a light guide plate that guides light, an illuminating light source configured at an end portion of the light guide plate, and a reflection pattern configured on a back surface side of the light guide plate to reflect light from the illuminating light source to a front surface side of the light guide plate. A density of the reflection pattern is adjusted corresponding to a positional relationship between the surface light emitting panel and the pattern index.
    Type: Application
    Filed: December 24, 2024
    Publication date: September 4, 2025
    Applicant: NIDEK CO., LTD.
    Inventors: Shinji Mita, Seiji Masegi, Ryo Nakamura
  • Patent number: 12366033
    Abstract: A dyeing data management method is performed between dyeing systems disposed at different locations. The method includes a first dyeing step of dyeing a lens in a first dyeing system, a first acquisition step of acquiring first result color information of the lens dyed in the first dyeing system, a dyeing data creation step of creating dyeing data based on a discharge amount of dye in the first dyeing step and the first result color information, a data provision step of providing the dyeing data for dyeing a lens to a predetermined color from the first dyeing system to a second dyeing system, a second dyeing step of performing dyeing of a lens according to the provided dyeing data in the second dyeing system, and a second acquisition step of acquiring second result color information of the lens dyed in the second dyeing system.
    Type: Grant
    Filed: September 1, 2022
    Date of Patent: July 22, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Koji Abe, Minoru Inuzuka, Motoshi Tanaka, Ryoji Shibata, Shigenobu Nakamura
  • Patent number: 12352651
    Abstract: An eyeglasses lens measurement device measures an eyeglasses lens of eyeglasses. The eyeglasses lens measurement device includes a light source that emits a measurement light flux toward the eyeglasses lens, a transmissive display that transmits the measurement light flux from the light source and displays an index pattern formed by arranging a plurality of indexes, a detector that detects the measurement light flux passing through the eyeglasses lens and the transmissive display, and a controller. The controller is configured to control a display of the index pattern, acquire an optical characteristic of the eyeglasses lens, based on a detection result of the detector, and acquire lens information different from the optical characteristic of the eyeglasses lens, based on a detection result of the detector.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: July 8, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Katsuyasu Mizuno, Toshihiro Kobayashi, Yujiro Tochikubo, Yuichi Matsubara
  • Patent number: 12343079
    Abstract: A first information processing device acquires an instruction signal for instructing an operation of a subjective optometry device, and transmits a drive signal for causing the subjective optometry device to operate as instructed by the acquired instruction signal to the subjective optometry device. When the first information processing device is remote-accessed by a second information processing device, the first information processing device can acquire the instruction signal input to the second information processing device by a user via a network. The first information processing device can further acquire a response input by an examinee who visually recognizes a presented target, and can further generate an instruction signal instructing the operation of the subjective optometry device based on the acquired response.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: July 1, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Hirohisa Terabe, Taeko Horino
  • Patent number: 12343082
    Abstract: There is provided an ophthalmologic measurement apparatus for measuring a subject eye. The apparatus includes measurement means for objectively measuring eye refractive power of the subject eye, acquisition means for acquiring intraocular lens information relating to an intraocular lens inserted into the subject eye, and correction means for correcting a measurement result of the eye refractive power, based on the intraocular lens information.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: July 1, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Michihiro Takii, Masanori Yatani, Kazunari Shimizu, Tetsuya Yamamoto
  • Publication number: 20250195034
    Abstract: An ultrasonic ophthalmic tonometer uses a plurality of ultrasonic elements to irradiate a subject eye with an ultrasonic wave having a sufficient output for intraocular pressure measurement. The ultrasonic ophthalmic tonometer measures an intraocular pressure of the subject eye by using the ultrasonic wave. The ultrasonic ophthalmic tonometer includes an imaging optical system that images the subject eye, and an irradiation unit including the plurality of ultrasonic elements and a support member supporting the ultrasonic elements, and irradiating the subject eye with the ultrasonic wave. An opening portion is provided with the support member. The opening portion allows an optical axis of the imaging optical system to pass therethrough.
    Type: Application
    Filed: March 28, 2023
    Publication date: June 19, 2025
    Applicant: NIDEK CO., LTD.
    Inventors: Tsutomu UEMURA, Koji HAMAGUCHI, Kenji NAKAMURA
  • Patent number: 12293512
    Abstract: An ophthalmic image processing device processes an ophthalmic image of a subject eye. The ophthalmic image processing device includes a controller which acquires an ophthalmic image including a tomographic image of a plurality of tomographic planes in a subject eye, acquires a probability distribution for identifying two or more tissues included in a plurality of tissues in the tomographic image, by inputting the ophthalmic image into a mathematical model trained with using a machine learning algorithm, generates a structural abnormality degree map showing a two-dimensional distribution of a degree of abnormality of a structure in the tissue, for each of the two or more tissues, based on the probability distribution, and simultaneously displays two or more structural abnormality degree maps generated for each of the two or more tissues side by side on a display device.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: May 6, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Ryosuke Shiba, Yoshiki Kumagai
  • Patent number: 12293518
    Abstract: In this invention, a control unit in an ophthalmic image processing device acquires an ophthalmic image captured by an ophthalmic image capture device (S11). The control unit, by inputting the ophthalmic image into a mathematical model that has been trained by a machine-learning algorithm, acquires a probability distribution in which the random variables are the coordinates at which a specific site and/or a specific boundary of a tissue is present within a region of the ophthalmic image (S14). On the basis of the acquired probability distribution, the control unit detects the specific boundary and/or the specific site (S16, S24).
    Type: Grant
    Filed: March 13, 2024
    Date of Patent: May 6, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Ryosuke Shiba, Sohei Miyazaki, Yusuke Sakashita, Yoshiki Kumagai, Naoki Takeno
  • Patent number: 12274504
    Abstract: A non-contact ultrasonic tonometer for measuring the eye pressure of an examinee's eye by use of ultrasound includes a Langevin transducer. The Langevin transducer applies ultrasound to the examinee's eye to measure the eye pressure of the examinee's eye. Further, A non-contact ultrasonic tonometer for measuring the eye pressure of an examinee's eye by use of ultrasound includes: ultrasonic generating means for generating ultrasound; a support base supporting the ultrasonic generating means; and attaching means for attaching the ultrasonic generating means to the support base.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: April 15, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Tetsuyuki Miwa, Kazunari Shimizu, Shirohisa Kobayashi, Tsutomu Uemura, Kenji Nakamura
  • Patent number: 12232813
    Abstract: A control section of an ophthalmologic image processing apparatus acquires an ophthalmologic image captured by an ophthalmologic image capturing apparatus. The control section acquires, for the acquired ophthalmologic image, evaluation information indicating an appropriateness for acquiring medical data including at least any of an analysis result relating to a disease of a subject eye, an analysis result relating to the structure of the subject eye, and an image converted from the acquired ophthalmologic image. The control section acquires the medical data based on the acquired ophthalmologic image. The control section changes a medical data acquisition method according to whether or not the evaluation information on the ophthalmologic image satisfies a criterion.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: February 25, 2025
    Assignee: NIDEK CO., LTD.
    Inventors: Ryosuke Shiba, Sohei Miyazaki, Yoshiki Kumagai