公开(公告)号：US10101148B2

公开(公告)日：2018-10-16

申请号：US15782300

申请日：2017-10-12

Applicant: NIDEK CO., LTD.

Inventor： Keiji Murata ,  Masaaki Hanebuchi

IPC: G01B11/02 ,  G01B9/02

Abstract: An OCT apparatus includes: a light source unit that includes first and second wavelength sweeping light sources which sequentially emit light with first and second spectrum bandwidths; an SS-OCT optical system that splits the light into measurement light and reference light to receive interference signal light; a second detector that is a deviation detector detecting a phase deviation and a wavelength deviation and detects a signal including pieces of FPN; a calculation processor connecting first and second spectrum interference signals and processes the connected spectrum interference signals to acquire an OCT image and that obtains the phase deviation and the wavelength deviation; and a correction unit that corrects the phase deviation and the wavelength deviation and corrects the phase deviation and the wavelength deviation obtained by the calculation processor.

公开(公告)号：US10674905B2

公开(公告)日：2020-06-09

申请号：US15941902

申请日：2018-03-30

Applicant: NIDEK CO., LTD.

Inventor： Keiji Murata ,  Yusuke Ando ,  Sasagu Tachibana

IPC: A61B3/10 ,  A61B3/12 ,  A61B5/00

Abstract: An OCT apparatus includes an OCT optical system guiding measurement light to a region including a central portion and a peripheral portion of a fundus, and an image processor processing a spectral interference signal output from the OCT optical system to acquire OCT data of an examinee's eye. The OCT optical system includes a first reference optical path having a path length for obtaining OCT data including the central portion and a second reference optical path having a path length for obtaining OCT data including the peripheral portion. The image processor obtains OCT data including the central portion based on an interference signal between measurement light guided to the central portion and reference light from the first reference optical path, and obtains OCT data including the peripheral portion based on an interference signal between measurement light guided to the peripheral portion and reference light from the second reference optical path.

公开(公告)号：US10238281B2

公开(公告)日：2019-03-26

申请号：US15422866

申请日：2017-02-02

Applicant: NIDEK CO., LTD.

Inventor： Naoki Isogai ,  Hideki Aono ,  Yukihiro Higuchi ,  Yuji Murase ,  Norimasa Satake ,  Keiji Murata

IPC: A61B3/10 ,  A61B3/12 ,  A61B3/00 ,  A61F9/008

Abstract: An optical coherence tomography device includes an OCT optical system that irradiates a tissue of the subject's eye with measurement light from a light source, and detects interference between reference light and the measurement light reflected from the tissue by using a detector, and a processor, in which the processor performs a generation process of acquiring A-scan data based on a signal output from the detector in a cycle of 300 kilohertz or more and generating three-dimensional OCT data at any time based on the acquired A-scan data, and performs an analysis process on each piece of the three-dimensional OCT data generated at any time through the generation process, so as to output a real-time analysis result of the three-dimensional OCT data which is generated at any time.

公开(公告)号：US10076243B2

公开(公告)日：2018-09-18

申请号：US15141973

申请日：2016-04-29

Applicant: NIDEK CO., LTD.

Inventor： Keiji Murata ,  Masaaki Hanebuchi ,  Masakazu Endo

IPC: A61B3/14 ,  A61B3/10 ,  A61B3/117 ,  A61B3/12 ,  A61B3/00

CPC classification number: A61B3/102 ,  A61B3/0025 ,  A61B3/1025 ,  A61B3/117 ,  A61B3/1225

Abstract: An ophthalmic imaging device for capturing a tomographic image of an eye, includes: an OCT optical system detecting interference of reference light and measurement light; a measurement optical system including an optical scanner and an objective optical system, the optical scanner being configured to deflect the measurement light to perform scanning with the measurement light; a driver configured to displace a relative position of the optical scanner with respect to the objective optical system in an optical axis direction; and a controller configured to control the driver to adjust a turning position of the measurement light in the optical axis direction. The controller changes the turning position between a first position corresponding to a first depth band of the eye and a second position corresponding to a second depth band of the eye which is different from the first depth band.

公开(公告)号：US09709383B2

公开(公告)日：2017-07-18

申请号：US15141142

申请日：2016-04-28

Applicant: NIDEK CO., LTD.

Inventor： Masaaki Hanebuchi ,  Keiji Murata

IPC: G01B9/02 ,  A61B3/12 ,  A61B3/10 ,  A61B5/00 ,  G01N21/47 ,  G01N21/21

CPC classification number: G01B9/02091 ,  A61B3/102 ,  A61B3/1233 ,  A61B5/0066 ,  G01B9/02019 ,  G01B9/02028 ,  G01B9/02087 ,  G01B2290/45 ,  G01B2290/70 ,  G01N21/21 ,  G01N21/4795

Abstract: An optical coherence tomography apparatus includes: an OCT light source; a first light splitter configured to split an optical path into a first measurement optical path and a reference optical path; a light guide optical system including a second light splitter, configured to guide the measurement light to a test substance through the second light splitter, the second light splitter splitting the reflected light into the first and second measurement optical paths; a detection optical system detecting first interference between the reflected light having passed through the first measurement optical path and the reference light, and second interference between the reflected light having passed through the second measurement optical path and the reference light; and a calculation controller processing an output signal which is output from the detection optical system to obtain OCT data regarding the test substance.

公开(公告)号：US11129528B2

公开(公告)日：2021-09-28

申请号：US16145982

申请日：2018-09-28

Applicant: NIDEK CO., LTD.

Inventor： Keiji Murata

IPC: A61B3/10 ,  A61B3/14 ,  G01B9/02 ,  A61B3/117 ,  A61B3/00 ,  G01N21/47 ,  G02B27/10

Abstract: An OCT apparatus includes an OCT optical system that splits light from an OCT light source into a measurement optical path and a reference optical path and detects a spectral interference signal between measurement light and reference light, an image processor that processes the spectral interference signal to acquire OCT data of an examinee's eye, an optical scanner that deflects the measurement light and performs scanning on tissue of the examinee's eye, and a light guiding optical system that includes an objective optical system curving a concentrating plane such that the concentrating plane has a convex shape toward a side of a fundus, and forms the concentrating plane of the measurement light in an anterior chamber.