Patents by Inventor Yoko Hirohara
Yoko Hirohara 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).
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Publication number: 20230218161Abstract: An ophthalmic apparatus includes an objective lens, and an OCT optical system optical system is configured to project a measurement light onto a subject's left or right eye via an objective lens, and to detect interference light between returning light of the measurement light a reference light having traveled through a reference optical path. An optical axis switching member switches an optical axis of the OCT optical system to approximately coincide with a first or second measurement optical axis. A controller is configured to control the optical axis switching member. An intraocular parameter calculator calculates an intraocular parameter of the subject's left or right eye based on a detection result of the interference light acquired in a state where the optical axis of the OCT optical system is switched so that the optical axis of the OCT optical system approximately coincides with the first or second measurement optical axis.Type: ApplicationFiled: December 30, 2022Publication date: July 13, 2023Applicant: Topcon CorporationInventor: Yoko HIROHARA
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Publication number: 20230218167Abstract: An ophthalmic apparatus includes an objective lens arranged to be passed through by first and second measurement optical axes that are positioned at a distance from each other. An OCT optical system performs OCT on a subject's left eye arranged on the first measurement optical axis or a subject's right eye arranged on the second measurement optical axis. An optical axis adjusting unit adjusts an optical axis of the OCT optical system under control of a controller so that the optical axis approximately coincides with any one of the first measurement optical axis and the second measurement optical axis. An intraocular parameter calculator calculates an intraocular parameter of the subject's left or right eye based on a detection result of interference light acquired in a state where the optical axis of the OCT optical system approximately coincides with the first or second measurement optical axis.Type: ApplicationFiled: December 22, 2022Publication date: July 13, 2023Applicant: Topcon CorporationInventor: Yoko HIROHARA
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Patent number: 11363948Abstract: An ophthalmologic device includes: a visual target presenting unit configured to present a common visual target to be viewed with both subject's eyes; a presenting distance changing unit configured to change a presenting distance of the visual target presented by the visual target presenting unit from a predetermined far vision distance to a predetermined near vision distance; an ocular characteristic acquiring unit configured to objectively acquire an optical characteristic of the subject's eyes; an addition power adding unit configured to add the addition power to the both subject's eyes; and a control unit configured to cause the presenting distance changing unit to change the presenting distance and the ocular characteristic acquiring unit to continuously acquire the optical characteristic, in a state in which an addition power is added to the both subject's eyes by the addition power adding unit.Type: GrantFiled: November 22, 2019Date of Patent: June 21, 2022Assignees: OSAKA UNIVERSITY, TOPCON CORPORATIONInventors: Takashi Fujikado, Yoko Hirohara, Makoto Saika, Suguru Miyagawa
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Publication number: 20200085293Abstract: An ophthalmologic device includes: a visual target presenting unit configured to present a common visual target to be viewed with both subject's eyes; a presenting distance changing unit configured to change a presenting distance of the visual target presented by the visual target presenting unit from a predetermined far vision distance to a predetermined near vision distance; an ocular characteristic acquiring unit configured to objectively acquire an optical characteristic of the subject's eyes; an addition power adding unit configured to add the addition power to the both subject's eyes; and a control unit configured to cause the presenting distance changing unit to change the presenting distance and the ocular characteristic acquiring unit to continuously acquire the optical characteristic, in a state in which an addition power is added to the both subject's eyes by the addition power adding unit.Type: ApplicationFiled: November 22, 2019Publication date: March 19, 2020Applicants: OSAKA UNIVERSITY, TOPCON CORPORATIONInventors: Takashi FUJIKADO, Yoko HIROHARA, Makoto SAIKA, Suguru MIYAGAWA
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Patent number: 7850305Abstract: The object of the invention is to provide a favorable spectral characteristic that reduces variation depending on the frequency of received light intensity, and that is gentle on a subject eye. It also eliminates displacement between positions of respective spectral images of the same part even if a change in alignment occurs between the eye and apparatus with the lapse of time.Type: GrantFiled: December 2, 2005Date of Patent: December 14, 2010Assignee: Topcon CorporationInventors: Yoko Hirohara, Tatsuo Yamaguchi, Toshifumi Mihashi, Hiroyuki Aoki, Yasuko Tsuruga
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Patent number: 7806529Abstract: An eye examination apparatus 100 of the present invention comprises, a refractive power measuring section 50 for measuring refractive powers of subject eyes E of a subject in a binocular viewing state, an eye chart presenting section 30 for presenting a subjective measurement eye chart to be observed by the subject, a correcting section 40 for correcting the subject eyes by referring to data on the refractive powers measured with the refractive power measuring section 50 and using the subjective measurement eye chart presented in the eye chart presenting section 30 and an optical characteristics measuring section 10 for subjectively measuring an optical characteristic of the subject eyes E corrected or being corrected with the correcting section 40 in a state where the subject is binocularly viewing the subjective measurement eye chart.Type: GrantFiled: March 27, 2008Date of Patent: October 5, 2010Assignee: Topcon CorporationInventors: Toshifumi Mihashi, Yoko Hirohara, Mariko Kobayashi
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Patent number: 7677728Abstract: A subject is placed in a more natural state or is encouraged to blink at specified intervals to obtain a measurement result under a fixed condition, and the judgment of the degree of dry eye is facilitated. A measurement part obtains, based on a reflected light flux from a subject eye, optical characteristic data of a two-dimensional vector form representing the time course of each optical characteristic of the subject eye in an blink interval from a certain blink to a next blink with respect to the first to the nth blink intervals. An analysis part one-dimensionally arranges each of the optical characteristic data with respect to the first to the nth blink intervals measured by the measurement part, and arranges the one-dimensional arrangement of the optical characteristic in a p-th blink interval at a p column to create a two-dimensional array, and performs a principal component analysis processing on the two-dimensional array.Type: GrantFiled: March 21, 2007Date of Patent: March 16, 2010Assignee: Kabuhsiki Kaisha TopconInventors: Yoko Hirohara, Toshifumi Mihashi
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Patent number: 7677731Abstract: Scattering can be measured by using an optical system having a Hartman-Shack wave-surface sensor.Type: GrantFiled: November 15, 2007Date of Patent: March 16, 2010Assignee: Kabushiki Kaisha TopconInventors: Toshifumi Mihashi, Yoko Hirohara, Takashi Fujikado, Naoyuki Maeda
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Patent number: 7568800Abstract: To provide a spectroscopic fundus measuring apparatus capable of identifying each part in spectral fundus images easily and accurately based on its spectral characteristic and a measuring method therefor. A spectral fundus image measuring apparatus 1 of the present invention includes: an illumination optical system 10; a light receiving optical system 20 for photographing a series of spectral fundus images of different wavelengths; an image processing section 7 for processing the spectral fundus images; a storage section 7A; and a display section 7B. The image processing section 7 has a position correcting section 72 for correcting the series of spectral fundus images to match the positions of the same parts therein, and an image analyzing section 73 for calculating the spectral characteristic of each part in the spectral fundus images based on the series of spectral fundus images corrected in the position correcting section 72.Type: GrantFiled: June 14, 2007Date of Patent: August 4, 2009Assignee: Topcon CorporationInventors: Toshifumi Mihashi, Yoko Hirohara
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Patent number: 7490939Abstract: A first illuminating optical system illuminates an eye with a wide beam. A first light receiving unit receives reflection light fluxes from the eye that have been converted into at least 17 beams by a first conversion member. A first compensation optical unit, disposed in the first illuminating optical system, compensates an illuminating light flux to the eye for aberration. A second compensation optical unit, disposed in a first light receiving optical system, compensates a reflection light flux from the eye for aberration. An operation unit determines, based on an output from the first light receiving unit, a compensation amount for cancelling out aberration to deform the first and second compensation optical units and compensate for aberration. The operation unit determines the optical characteristics of the eye, based on an output from the first light receiving unit after compensation, and on compensated optical characteristics.Type: GrantFiled: September 25, 2003Date of Patent: February 17, 2009Assignee: Kabushiki Kaisha TopconInventors: Yoko Hirohara, Tatsuo Yamaguchi
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Patent number: 7465049Abstract: A portable ophthalmic apparatus (1) according to the present invention comprises a supporting part (7) to which a cellular phone (2) having a photographing camera (5) is mounted detachably and a main body (6) which is provided with the supporting part (7) integrally and has an illumination optical system (13) projecting an illumination beam toward photographing objective eyes (E) along an illumination optical axis (O2) intersected at a predetermined angle with a photographing optical axis (O1).Type: GrantFiled: August 13, 2003Date of Patent: December 16, 2008Assignee: Kabushiki Kaisha TOPCONInventors: Naoyuki Maeda, Yoko Hirohara, Toshifumi Mihashi
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Patent number: 7441900Abstract: A contrast chart device of the present invention comprises a contrast target presenting part for presenting a contrast target for a contrast sensitivity test at prescribed timing; a pupil data measuring part for producing an image of an anterior ocular segment of a subject and measuring the diameter or area of a pupil region in the anterior ocular segment; and a measurement timing forming part for forming timing at which the pupil data measuring part performs measurement.Type: GrantFiled: February 7, 2002Date of Patent: October 28, 2008Assignee: Topcon CorporationInventors: Toshifumi Mihashi, Yoko Hirohara
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Publication number: 20080246921Abstract: To provide an eye examination apparatus and an eye examination method that make it possible to measure eyesight or contrast sensitivity in the binocular viewing state and further make it possible to measure optical characteristics in such an appropriate binocular viewing state.Type: ApplicationFiled: March 27, 2008Publication date: October 9, 2008Inventors: Toshifumi MIHASHI, Yoko HIROHARA, Mariko KOBAYASHI
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Publication number: 20080123053Abstract: Scattering can be measured by using an optical system having a Hartman-Shack wave-surface sensor.Type: ApplicationFiled: November 15, 2007Publication date: May 29, 2008Inventors: Toshifumi Mihashi, Yoko Hirohara, Takashi Fujikado, Naoyuki Maeda
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Patent number: 7360894Abstract: In an ophthalmological apparatus, how scattering at an eye under measurement and a contact lens affects how the eye sees is shown by measuring scattering when the contact lens is worn and by comparing a retinal image obtained with aberration and the scattering taken into account and a retinal image obtained with only the aberration taken into account. An aberration measurement section obtains the aberration of the eye under measurement. An other-components measurement section obtains other components other than the aberration component based on a point light-source image caused by each Hartmann plate. A scattering-level calculation section obtains a coefficient expressing the level of scattering based on the other components and the aberration. A simulation section generates a retinal image or data indicating how the eye under measurement sees with the measured aberration and the other components taken into account, based on the aberration and the coefficient.Type: GrantFiled: March 28, 2005Date of Patent: April 22, 2008Assignee: Kabushiki Kaisha TopconInventor: Yoko Hirohara
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Publication number: 20080007692Abstract: To provide a spectroscopic fundus measuring apparatus capable of identifying each part in spectral fundus images easily and accurately based on its spectral characteristic and a measuring method therefor. A spectral fundus image measuring apparatus 1 of the present invention includes: an illumination optical system 10 having an illumination light source 11 for illuminating a fundus; a light receiving optical system 20 for receiving a wavelength-tunable light beam reflected from the illuminated fundus to photograph a series of spectral fundus images of different wavelengths; an image processing section 7 for processing the spectral fundus images; a storage section 7A for storing the spectral fundus images; and a display section 7B for displaying the spectral fundus images.Type: ApplicationFiled: June 14, 2007Publication date: January 10, 2008Inventors: Toshifumi Mihashi, Yoko Hirohara, Hiroyuki Aoki, Yasuko Tsuruga
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Publication number: 20080007691Abstract: To provide a spectroscopic fundus measuring apparatus capable of identifying each part in spectral fundus images easily and accurately based on its spectral characteristic and a measuring method therefor. A spectral fundus image measuring apparatus 1 of the present invention includes: an illumination optical system 10; a light receiving optical system 20 for photographing a series of spectral fundus images of different wavelengths; an image processing section 7 for processing the spectral fundus images; a storage section 7A; and a display section 7B. The image processing section 7 has a position correcting section 72 for correcting the series of spectral fundus images to match the positions of the same parts therein, and an image analyzing section 73 for calculating the spectral characteristic of each part in the spectral fundus images based on the series of spectral fundus images corrected in the position correcting section 72.Type: ApplicationFiled: June 14, 2007Publication date: January 10, 2008Inventors: Toshifumi Mihashi, Yoko Hirohara
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Patent number: 7311402Abstract: Scattering can be measured by using an optical system having a Hartman-Shack wave-surface sensor.Type: GrantFiled: August 9, 2002Date of Patent: December 25, 2007Assignee: Kabushiki Kaisha TopconInventors: Toshifumi Mihashi, Yoko Hirohara, Takashi Fujikado, Naoyuki Maeda
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Patent number: 7309126Abstract: A device for measuring eye characteristics, an operation device, and the coordinate origin and the coordinate axes of each eye are sufficiently related with one another. A measuring unit (111) measures eye optical characteristics based on a first light receiving signal from a first light receiving unit (23), and measures a cornea topography based on a second light receiving signal from a second light receiving unit (35). The measuring unit (111) also computes an ablation amount based on an aberration result.Type: GrantFiled: October 16, 2001Date of Patent: December 18, 2007Assignee: Kabushiki Kaisha TopconInventors: Toshifumi Mihashi, Yoko Hirohara, Naoyuki Maeda
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Patent number: 7309127Abstract: A first movement unit for moving a condensing position so that a light flux from a light source is condensed on a place close to a retina of a subject eye, and a second movement unit for optically moving a conversion member for condensing a light flux reflected by the retina and a light receiving part for receiving light fluxes can be independently driven and can be further driven by an operation of an operator. First, an arithmetic part adjusts a projection side and a light receiving side based on first signals from the light receiving part. In a case where an independent mode is selected, the projection side and the light receiving side are adjusted automatically or manually. Further, the arithmetic part measures a characteristic of the eye in accordance with adjusted measurement conditions.Type: GrantFiled: August 4, 2003Date of Patent: December 18, 2007Assignee: Kabushiki Kaisha TopconInventors: Hiroaki Hashimoto, Yoko Hirohara