Patents by Inventor Kouta Fujii
Kouta Fujii 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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Patent number: 11253148Abstract: An ophthalmological device according to the embodiments comprises an objective lens, a subjective inspection optical system, and an interference optical system. The subjective inspection optical system includes an optical element capable of correcting aberration of a subject's eye and projects a visual target onto the subject's eye via the objective lens and the optical element. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens and the optical element, generates interference light between returning light of the measurement light and the reference light, and detects the generated interference light.Type: GrantFiled: November 18, 2019Date of Patent: February 22, 2022Assignee: TOPCON CORPORATIONInventors: Takefumi Hayashi, Kouta Fujii
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Patent number: 11013400Abstract: An ophthalmic apparatus of an exemplary embodiment is capable of applying OCT to the fundus of a subject's eye, and includes an optical system, an optical scanner, an optical path length changing device, and a controller. The optical system splits light output front a light source into measurement light and reference light, projects the measurement light onto the fundus, generates interference light by superposing returning light of the measurement light from the subject's eye on the reference light, and detects the interference light. The optical scanner deflects the measurement light for scanning the fundus. The optical path length changing device changes at least one of an optical path length of the measurement light and an optical path length of the reference light. The controller controls the optical scanner based on at least the optical path length.Type: GrantFiled: September 24, 2018Date of Patent: May 25, 2021Assignee: TOPCON CORPORATIONInventors: Kouta Fujii, Makoto Saika, Jun Sakai
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Patent number: 10881294Abstract: An ophthalmic apparatus of an embodiment include a data acquisition device, distribution data generator, correction value calculator, magnification corrector, and data comparator. The data acquisition device acquires three dimensional data by applying OCT to the fundus of a subject's eye. The distribution data generator generates distribution data of a predetermined measurement value in the fundus based on the three dimensional data. The correction value calculator calculates a magnification correction value based on a predetermined condition for acquiring the three dimensional data. The magnification corrector changes at least one of the size of standard distribution data generated in advance for the predetermined measurement value and the size of the distribution data, based on the magnification correction value. The data comparator compares the distribution data with the standard distribution data, at least one of whose sizes has been changed by the magnification corrector.Type: GrantFiled: September 17, 2018Date of Patent: January 5, 2021Assignee: TOPCON CORPORATIONInventors: Kouta Fujii, Makoto Saika, Jun Sakai
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Patent number: 10791922Abstract: An ophthalmological device according to the embodiments comprises an objective lens, a subjective inspection optical system, and an interference optical system. The subjective inspection optical system includes an optical element capable of correcting aberration of a subject's eye and projects a visual target onto the subject's eye via the objective lens and the optical element. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens and the optical element, generates interference light between returning light of the measurement light and the reference light, and detects the generated interference light.Type: GrantFiled: January 13, 2017Date of Patent: October 6, 2020Assignee: TOPCON CORPORATIONInventors: Takefumi Hayashi, Kouta Fujii
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Patent number: 10743760Abstract: An ophthalmological device according to the embodiments comprises an objective lens, an objective measurement optical system, an interference optical system, and an image forming unit. The objective measurement optical system irradiates light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens so as to overlap at least part of an area of the irradiated light at the subject's eye by the objective measurement optical system, generates interference light between returning light of the measurement light and the reference light, and detects the generated interference light. The image forming unit forms a tomographic image of the subject's eye based on a detection result of the interference light by the interference optical system.Type: GrantFiled: January 13, 2017Date of Patent: August 18, 2020Assignee: TOPCON CORPORATIONInventors: Takefumi Hayashi, Kouta Fujii
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Publication number: 20200077888Abstract: An ophthalmological device according to the embodiments comprises an objective lens, a subjective inspection optical system, and an interference optical system. The subjective inspection optical system includes an optical element capable of correcting aberration of a subject's eye and projects a visual target onto the subject's eye via the objective lens and the optical element. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens and the optical element, generates interference light between returning light of the measurement light and the reference light, and detects the generated interference light.Type: ApplicationFiled: November 18, 2019Publication date: March 12, 2020Applicant: TOPCON CORPORATIONInventors: Takefumi HAYASHI, Kouta FUJII
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Publication number: 20190090735Abstract: An ophthalmic apparatus of an exemplary embodiment is capable of applying OCT to the fundus of a subject's eye, and includes an optical system, an optical scanner, an optical path length changing device, and a controller. The optical system splits light output front a light source into measurement light and reference light, projects the measurement light onto the fundus, generates interference light by superposing returning light of the measurement light from the subject's eye on the reference light, and detects the interference light. The optical scanner deflects the measurement light for scanning the fundus. The optical path length changing device changes at least one of an optical path length of the measurement light and an optical path length of the reference light. The controller controls the optical scanner based on at least the optical path length.Type: ApplicationFiled: September 24, 2018Publication date: March 28, 2019Applicant: TOPCON CORPORATIONInventors: Kouta FUJII, Makoto SAIKA, Jun SAKAI
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Publication number: 20190082957Abstract: An ophthalmic apparatus of an embodiment include a data acquisition device, distribution data generator, correction value calculator, magnification corrector, and data comparator. The data acquisition device acquires three dimensional data by applying OCT to the fundus of a subject's eye. The distribution data generator generates distribution data of a predetermined measurement value in the fundus based on the three dimensional data. The correction value calculator calculates a magnification correction value based on a predetermined condition for acquiring the three dimensional data. The magnification corrector changes at least one of the size of standard distribution data generated in advance for the predetermined measurement value and the size of the distribution data, based on the magnification correction value. The data comparator compares the distribution data with the standard distribution data, at least one of whose sizes has been changed by the magnification corrector.Type: ApplicationFiled: September 17, 2018Publication date: March 21, 2019Applicant: TOPCON CORPORATIONInventors: Kouta FUJII, Makoto SAIKA, Jun SAKAI
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Publication number: 20190008380Abstract: An ophthalmological device according to the embodiments comprises an objective lens, an objective measurement optical system, an interference optical system, and an image forming unit. The objective measurement optical system irradiates light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens so as to overlap at least part of an area of the irradiated light at the subject's eye by the objective measurement optical system, generates interference light between returning light of the measurement light and the reference light, and detects the generated interference light. The image forming unit forms a tomographic image of the subject's eye based on a detection result of the interference light by the interference optical system.Type: ApplicationFiled: January 13, 2017Publication date: January 10, 2019Applicant: TOPCON CORPORATIONInventors: Takefumi HAYASHI, Kouta FUJII
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Publication number: 20190008378Abstract: An ophthalmological device according to the embodiments comprises an objective lens, a subjective inspection optical system, and an interference optical system. The subjective inspection optical system includes an optical element capable of correcting aberration of a subject's eye and projects a visual target onto the subject's eye via the objective lens and the optical element. The interference optical system splits light from a light source into reference light and measurement light, projects the measurement light onto the subject's eye via the objective lens and the optical element, generates interference light between returning light of the measurement light and the reference light, and detects the generated interference light.Type: ApplicationFiled: January 13, 2017Publication date: January 10, 2019Inventors: Takefumi HAYASHI, Kouta FUJII
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Patent number: 10028655Abstract: An optical system of an ophthalmologic imaging apparatus of embodiment splits light from a first light source into measurement light and reference light and detects interference light of returned light of measurement light from an eye and reference light. An image forming part forms an image based on detection result from the optical system. The optical unit includes a lens and joining member. The lens is locatable in an optical path of measurement light and used for changing a focus position of measurement light from a first site of the eye to second site. The joining member joins an optical path from a second light source to the optical path of measurement light. The optical unit converges light from the second light source having been guided into the optical path of measurement light by the joining member on an eye fundus via the lens.Type: GrantFiled: February 19, 2015Date of Patent: July 24, 2018Assignee: KABUSHIKI KAISHA TOPCONInventors: Kouta Fujii, Kenji Miyashita
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Publication number: 20150245765Abstract: An optical system of an ophthalmologic imaging apparatus of embodiment splits light from a first light source into measurement light and reference light and detects interference light of returned light of measurement light from an eye and reference light. An image forming part forms an image based on detection result from the optical system. The optical unit includes a lens and joining member. The lens is locatable in an optical path of measurement light and used for changing a focus position of measurement light from a first site of the eye to second site. The joining member joins an optical path from a second light source to the optical path of measurement light. The optical unit converges light from the second light source having been guided into the optical path of measurement light by the joining member on an eye fundus via the lens.Type: ApplicationFiled: February 19, 2015Publication date: September 3, 2015Applicant: KABUSHIKI KAISHA TOPCONInventors: Kouta FUJII, Kenji Miyashita
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Patent number: 8205988Abstract: In intraocular observation of the eye, the slit lamp microscope 1causes the illumination light emitted by the illumination system 8 to enter the inside of the eye via the head lens 20 and causes an intraocularly reflected light of this illumination light to enter the observation system 6 via the head lens 20 in a state that an illumination optical axis O2 and an observation axis O1 are arranged so as to be nonparallel and a head lens optical axis OF and the observation optical axis O1 are arranged so as to be separate right and left.Type: GrantFiled: February 18, 2009Date of Patent: June 26, 2012Assignee: Kabushiki Kaisha TopconInventors: Kouta Fujii, Takefumi Hayashi, Nobuaki Kitajima
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Publication number: 20100328608Abstract: In intraocular observation of the eye, the slit lamp microscope 1 causes the illumination light emitted by the illumination system 8 to enter the inside of the eye via the head lens 20 and causes an intraocularly reflected light of this illumination light to enter the observation system 6 via the head lens 20 in a state that an illumination optical axis O2 and an observation axis O1 are arranged so as to be nonparallel and a head lens optical axis OF and the observation optical axis O1 are arranged so as to be separate right and left.Type: ApplicationFiled: February 18, 2009Publication date: December 30, 2010Applicant: Kabushiki Kaisha TopconInventors: Kouta Fujii, Takefumi Hayashi, Nobuaki Kitajima