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    OPTICAL COHERENCE TOMOGRAPHY APPARATUS, CONTROL METHOD OF THE SAME, OPTICAL MEASUREMENT METHOD, AND RECORDING MEDIUM
    2.
    发明申请
    OPTICAL COHERENCE TOMOGRAPHY APPARATUS, CONTROL METHOD OF THE SAME, OPTICAL MEASUREMENT METHOD, AND RECORDING MEDIUM 有权

    公开(公告)号：US20210007600A1

    公开(公告)日：2021-01-14

    申请号：US16925346

    申请日：2020-07-10

    Applicant: TOPCON CORPORATION

    Inventor： Jun SAKAI ,  Toshihiro MINO

    IPC: A61B3/10 ,  A61B3/12 ,  A61B3/00

    Abstract: An exemplary OCT apparatus includes a scanner, controller, phase information generator, phase information processor. The scanner applies an OCT scan to an object using an optical scanner. The controller controls the scanner to perform a first scan that scans a cross section of the object in a first scan direction and a second scan that scans a cross section of the object in a second scan direction opposite to the first scan direction. The phase information generator generates first phase information based on first acquisition data acquired by the first scan and second phase information based on second acquisition data acquired by the second scan. The phase information processor generates composite phase information based on the first phase information and the second phase information.

    BLOOD FLOW MEASUREMENT APPARATUS
    4.
    发明申请
    BLOOD FLOW MEASUREMENT APPARATUS 有权

    公开(公告)号：US20210038075A1

    公开(公告)日：2021-02-11

    申请号：US16966480

    申请日：2018-12-26

    Applicant: TOPCON CORPORATION

    Inventor： Jun SAKAI ,  Shunsuke NAKAMURA ,  Kana NISHIKAWA ,  Masahiro AKIBA

    IPC: A61B3/12 ,  A61B3/10 ,  A61B3/00

    Abstract: A blood flow measuring unit of a blood flow measurement apparatus of an embodiment includes an optical system for applying an OCT scan to an eye fundus and obtains blood flow information based on data acquired by the OCT scan. A movement mechanism moves the optical system. A controller applies a first movement control to the movement mechanism to move the optical system in a first direction orthogonal to an optical axis of the optical system by a predetermined distance from the optical axis. A judging unit judges occurrence of vignetting based on a detection result of return light of light incident on the eye through the optical system after the first movement control. The controller applies a second movement control to the movement mechanism to further move the optical system based on a judgement result obtained by the judging unit.

    OPHTHALMIC APPARATUS
    6.
    发明申请
    OPHTHALMIC APPARATUS 审中-公开

    公开(公告)号：US20190090735A1

    公开(公告)日：2019-03-28

    申请号：US16139195

    申请日：2018-09-24

    Applicant: TOPCON CORPORATION

    Inventor： Kouta FUJII ,  Makoto SAIKA ,  Jun SAKAI

    IPC: A61B3/10 ,  A61B3/12

    Abstract: 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.

    OPHTHALMIC APPARATUS
    7.
    发明申请
    OPHTHALMIC APPARATUS 审中-公开

    公开(公告)号：US20190082957A1

    公开(公告)日：2019-03-21

    申请号：US16132507

    申请日：2018-09-17

    Applicant: TOPCON CORPORATION

    Inventor： Kouta FUJII ,  Makoto SAIKA ,  Jun SAKAI

    IPC: A61B3/12 ,  A61B3/10 ,  A61B3/00

    Abstract: 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.

    OPHTHALMIC APPARATUS, METHOD OF CONTROLLING OPHTHALMIC APPARATUS, AND RECORDING MEDIUM
    10.
    发明公开
    OPHTHALMIC APPARATUS, METHOD OF CONTROLLING OPHTHALMIC APPARATUS, AND RECORDING MEDIUM 审中-公开

    公开(公告)号：US20240032787A1

    公开(公告)日：2024-02-01

    申请号：US18118136

    申请日：2023-03-07

    Applicant: Topcon Corporation

    Inventor： Masashi NAKAJIMA ,  Jun SAKAI

    IPC: A61B3/10 ,  A61B3/00

    CPC classification number: A61B3/10 ,  A61B3/0025 ,  A61B3/0083

    Abstract: An ophthalmic apparatus includes an optical system having an illumination and imaging optical systems, a movement mechanism, and a controller. The illumination optical system may illuminate a fundus of a subject's eye with illumination light. The movement mechanism may relatively move the subject's eye and the optical system in an optical axis direction of the imaging optical system. When a corneal curvature radius is R and a distance from a corneal apex position to an imaging aperture conjugate position substantially conjugate optically to the imaging aperture is d, the controller may control the movement mechanism so that light amount of the returning light passing through the imaging aperture becomes less than when a distance in the optical axis direction between the imaging aperture conjugate position and a position of a corneal reflection image of the illumination light is (R/2−d).

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