公开(公告)号：EP3459435A1

公开(公告)日：2019-03-27

申请号：EP18194502.3

申请日：2018-09-14

申请人： Topcon Corporation

发明人： FUJII, Kouta ,  SAIKA, Makoto ,  SAKAI, Jun

IPC分类号： A61B3/10

摘要： An ophthalmic apparatus (1) of an embodiment include a data acquisition device (100), distribution data generator (231), correction value calculator (232), magnification corrector (233), and data comparator (234). The data acquisition device (100) acquires three dimensional data by applying OCT to the fundus (Ef) of a subject's eye (E). The distribution data generator (231) generates distribution data (300) of a predetermined measurement value in the fundus based on the three dimensional data. The correction value calculator (232) calculates a magnification correction value based on a predetermined condition for acquiring the three dimensional data. The magnification corrector (233) changes at least one of the size of standard distribution data (400) generated in advance for the predetermined measurement value and the size of the distribution data (300), based on the magnification correction value. The data comparator (234) compares the distribution data (300) with the standard distribution data (400), at least one of whose sizes has been changed by the magnification corrector (233).

公开(公告)号：EP4226842A1

公开(公告)日：2023-08-16

申请号：EP23170242.4

申请日：2018-09-25

申请人： TOPCON CORPORATION

发明人： FUJII, Kouta ,  SAIKA, Makoto ,  SAKAI, Jun

IPC分类号： A61B3/10 ,  A61B3/103

摘要： An ophthalmic apparatus (1) of an exemplary embodiment is capable of applying OCT to the fundus (Ef) of a subject's eye (E), and includes an optical system, an optical scanner (44), an optical path length changing device (41, 114), a focus adjustment device (43, 43A), and a controller (210, 231). The optical system splits light output from a light source (101) into measurement light (LS) and reference light (LR), projects the measurement light onto the fundus (Ef), generates interference light (LC) by superposing returning light of the measurement light (LS) from the subject's eye (E) on the reference light (LR), and detects the interference light (LC). The optical scanner (44) deflects the measurement light (LS) in a two dimensional manner for scanning the fundus (Ef). The optical path length changing device (41, 114) changes at least one of an optical path length of the measurement light (LS) and an optical path length of the reference light (LR). The focus adjustment device (43, 43A) performs focus adjustment of a measurement arm. The controller (210, 231) calculates an estimated value of an axial length of the subject's eye (E) from a process of controlling the optical path length changing device (41, 114), performs focus adjustment of the measurement arm to calculate an estimated value of a diopter of the subject's eye (E) from a process of controlling the focus adjustment device (43, 43A), and controls the optical system and the optical scanner (44) based on a deflection range of the optical scanner (44) set based on the estimated value of the axial length and the estimated value of the diopter.

公开(公告)号：EP4082424A1

公开(公告)日：2022-11-02

申请号：EP22175085.4

申请日：2018-09-25

申请人： TOPCON CORPORATION

发明人： FUJII, Kouta ,  SAIKA, Makoto ,  SAKAI, Jun

IPC分类号： A61B3/10

摘要： An ophthalmic apparatus (1) of an exemplary embodiment is capable of applying OCT to the fundus (Ef) of a subject's eye (E), and includes an optical system, an optical scanner (44), an optical path length changing device (41), a focus adjustment device (43, 43A), and a controller (200). The optical system splits light output from a light source (101) into measurement light (LS) and reference light (LR), projects the measurement light (LS) onto the fundus (Ef), generates interference light (LC) by superposing returning light of the measurement light from the subject's eye on the reference light, and detects (125) the interference light. The optical scanner (44) deflects the measurement light (LS) in a two dimensional manner for scanning the fundus (Ef). The optical path length changing device (41, 114) changes at least one of an optical path length of the measurement light (LS) and an optical path length of the reference light (LR). The focus adjustment device (43, 43A) performs focus adjustment of the optical system. The controller (200) controls the optical scanner (44) based on at least the optical path length.