# US 11,298,019 B2 · Ophthalmologic apparatus and method for controlling the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,019 B2 - Document ID: US11298019B2 - Status: Granted - Kind: B2 - Application number: 16/718,223 - Filed: 2019-12-18 - Published: 2020-07-02 - Granted: 2022-04-12 - Earliest claimed: 2018-12-26 - Assignees: Topcon Corporation - Applicants: Topcon Corporation - Inventors: Ryoichi Hirose; Tatsuo Yamaguchi - Web page: https://patentgrep.com/patent/US11298019B2 ## CPC - A61B 3/152: {for aligning} - A61B 3/0025: {characterised by electronic signal processing, e.g. eye models} - A61B 3/102: {for optical coherence tomography [OCT]} - A61B 3/1025: {for confocal scanning} - A61B 3/103: for determining refraction, e.g. refractometers or skiascopes - A61B 3/12: for looking at the eye fundus, e.g. ophthalmoscopes (A61B3/13 takes precedence) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An ophthalmologic apparatus includes an acquisition unit and a controller. The acquisition unit includes an optical scanner capable of deflecting light in a predetermined deflection angle range. The acquisition unit is configured to acquire data of a subject's eye by performing A-scan on the subject's eye using optical coherence tomography by measurement light deflected by the optical scanner. The controller is configured to cause the acquisition unit to perform A-scan based on a deflection operation state of the optical scanner. ## Claims ### Claim 1 An ophthalmologic apparatus, comprising an acquisition unit including an optical scanner capable of deflecting light in a predetermined deflection angle range and configured to acquire data of a subject's eye by performing A-scan on the subject's eye using optical coherence tomography by measurement light deflected by the optical scanner; and a controller configured to cause the acquisition unit to perform A-scan based on a deflection operation state of the optical scanner, wherein the controller is configured to cause the acquisition unit to perform A-scan so that intervals between projection positions of the measurement light on the subject's eye are substantially equal. ### Claim 2 (depends on 1) The ophthalmologic apparatus of claim 1, further comprising a storage unit configured to store timing information of the A-scan in advance, wherein the controller is configured to cause the acquisition unit to perform A-scan based on the timing information. ### Claim 3 (depends on 2) The ophthalmologic apparatus of claim 2, wherein the timing information includes timing information of A-scan with reference to a reference timing of deflection operation of the optical scanner, and the controller is configured to cause the acquisition unit to perform A-scan at a timing specified by the timing information. ### Claim 4 (depends on 1) The ophthalmologic apparatus of claim 1, wherein the controller is configured to cause the acquisition unit to perform A-scan depending on a deflection angle of the optical scanner. ### Claim 5 (depends on 4) The ophthalmologic apparatus of claim 4, wherein the controller is configured: to acquire operation information representing a deflection angle of the optical scanner; to determine whether or not the deflection angle is a predetermined deflection angle based on the acquired operation information; and to cause the acquisition unit to perform A-scan when it is determined that, the deflection angle is the predetermined deflection angle. ### Claim 6 (depends on 1) The ophthalmologic apparatus of claim 1, wherein the optical scanner operates in at least one of a first range where a deflection angle varies linearly with respect to changes in time, and a second range where the deflection angle varies non-linearly with respect to the changes in time. ### Claim 7 An ophthalmologic apparatus, comprising: an acquisition unit including an optical scanner capable of deflecting light in a predetermined deflection angle range and configured to acquire data of a subject's eye by performing A-scan on the subject's eye using optical coherence tomography by measurement light deflected by the optical scanner; and a controller configured to cause the acquisition unit to perform A-scan based on a deflection operation state of the optical scanner, wherein the controller is configured to cause the acquisition unit to perform A-scan so that intervals between the deflection angles are substantially equal. ### Claim 8 (depends on 7) The ophthalmologic apparatus of claim 7, wherein the optical scanner operates in at least one of a first range where a deflection angle varies linearly with respect to changes in time, and a second range where the deflection angle varies non-linearly with respect to the changes in time. ### Claim 9 A method of controlling an ophthalmologic apparatus including an optical scanner capable of deflecting light in a predetermined deflection angle range, the method comprising: an acquisition step of acquiring data of a subject's eye by performing A-scan on the subject's eye using optical coherence tomography by measurement light deflected by the optical scanner; and a control step of performing A-scan based on a deflection operation state of the optical scanner, wherein the control step includes: an operation information acquisition step that acquires operation information representing a deflection angle of the optical scanner; a determination step that determines whether or not the deflection angle is a predetermined deflection angle based on the acquired operation information; and a performing step that performs A-scan when it is determined that the deflection angle is the predetermined deflection angle. ### Claim 10 (depends on 9) The method of controlling the ophthalmologic apparatus of claim 9, wherein the control step performs A-scan based on timing information of the A-scan stored in advance. ### Claim 11 (depends on 10) The method of controlling the ophthalmologic apparatus of claim 10, wherein the timing information includes timing information of A-scan with reference to a reference timing of deflection operation of the optical scanner, and the control step performs A-scan at a timing specified by the timing information. ### Claim 12 (depends on 9) The method of claim 9, wherein the optical scanner operates in at least one of a first range where a deflection angle varies linearly with respect to changes in time, and a second range where the deflection angle varies non-linearly with respect to the changes in time. ### Claim 13 A method of controlling an ophthalmologic apparatus including an optical scanner capable of deflecting light in a predetermined deflection angle range, the method comprising: an acquisition step of acquiring data of a subject's eye by performing A-scan on the subject's eye using optical coherence tomography by measurement light deflected by the optical scanner; and a control step of performing A-scan based on a deflection operation state of the optical scanner, wherein the control step performs A-scan so that intervals between the deflection angles are substantially equal. ### Claim 14 (depends on 13) The method of claim 13, wherein the optical scanner operates in at least one of a first range where a deflection angle varies linearly with respect to changes in time, and a second range where the deflection angle varies non-linearly with respect to the changes in time. ### Claim 15 A method of controlling an ophthalmologic apparatus including an optical scanner capable of deflecting light in a predetermined deflection angle range, the method comprising: an acquisition step of acquiring data of a subject's eye by performing A-scan on the subject's eye using optical coherence tomography by measurement light deflected by the optical scanner; and a control step of performing A-scan based on a deflection operation state of the optical scanner, wherein the control step performs A-scan so that intervals between projection positions of the measurement light on the subject's eye are substantially equal. ### Claim 16 (depends on 15) The method of claim 15, wherein the optical scanner operates in at least one of a first range where a deflection angle varies linearly with respect to changes in time, and a second range where the deflection angle varies non-linearly with respect to the changes in time.