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公开(公告)号：US11896307B2
公开(公告)日：2024-02-13
申请号：US16937607
申请日：2020-07-24
Applicant: TOPCON CORPORATION
Inventor： Yoko Tatara , Michiko Nakanishi , Shunichi Morishima
Abstract: An ophthalmologic apparatus includes a refractive power measurement optical system, a fixation projection system, an inspection optical system, and a controller. The refractive power measurement optical system includes a first focusing element capable of changing a focal position, and is configured to project first light onto a subject's eye and to detect returning light of the first light from the subject's eye via the first focusing element. The fixation projection system is configured to project fixation light target onto the subject's eye. The inspection optical system includes a second focusing element capable of changing a focal position in conjunction with the first focusing element, and is used for a predetermined inspection in which second light is projected onto at least the subject's eye via the second focusing element. The controller is configured to control the first focusing element and the second focusing element based on a detection result of the returning light, and to perform refractive power measurement using the first light in a state of promoting a fogging of the subject's eye by controlling the fixation projection system after performing the predetermined inspection by inspection optical system.
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公开(公告)号：US10980414B2
公开(公告)日：2021-04-20
申请号：US16289675
申请日：2019-03-01
Applicant: TOPCON CORPORATION
Inventor： Takefumi Hayashi , Yoko Tatara , Shunichi Morishima
Abstract: An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and an optical path separating unit. The refractive power measurement optical system is configured to project light in a first wavelength range onto a subject's eye via the objective lens and to detect returning light from the subject's eye. The inspection optical system is configured to project light in a second wavelength range onto the subject's eye via the objective lens. The optical path separating unit that is arranged in an optical path of the refractive power measurement optical system and is configured to separate an optical path of the inspection optical system from the optical path of the refractive power measurement optical system by performing wavelength separation based on changeable wavelength separation characteristics.
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公开(公告)号：US11497397B2
公开(公告)日：2022-11-15
申请号：US16289679
申请日：2019-03-01
Applicant: TOPCON CORPORATION
Inventor： Yoko Tatara , Michiko Nakanishi , Shunichi Morishima
Abstract: An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and a corneal shape measurement optical system. The refractive power measurement optical system projects light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The inspection optical system includes an optical scanner. The inspection optical system deflects light from a light source, projects the light deflected by the optical scanner onto the subject's eye via the objective lens, and detects returning light from the subject's eye. The corneal shape measurement optical system projects an arc-like or circumferential measurement pattern from an outer edge side of the objective lens onto the subject's eye and detects returning light from a cornea of the subject's eye. When a working distance is WD, a distance from a corneal apex of the subject's eye to a pupil of the subject's eye is d1, a distance from the pupil to a fundus of the subject's eye is d2, and a scan range by the optical scanner is SA square, a diameter of the objective lens is greater than or equal to ((WD+d1)×SA/d2).
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