公开(公告)号：US20180289256A1

公开(公告)日：2018-10-11

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

CPC classification number: A61B3/102 ,  A61B3/1225 ,  A61B5/0066

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：US20180256022A1

公开(公告)日：2018-09-13

申请号：US15913029

申请日：2018-03-06

Applicant: NIDEK CO., LTD.

Inventor： Michihiro TAKII ,  Masaaki HANEBUCHI ,  Hisashi OCHI ,  Sasagu TACHIBANA

IPC: A61B3/00 ,  A61B3/028

CPC classification number: A61B3/0008 ,  A61B3/0091 ,  A61B3/028 ,  A61B3/103 ,  A61B3/152 ,  A61B2560/0223

Abstract: A subjective optometry apparatus includes a light projecting optical system that projects a target light flux to an examinee's eye, a fixed optical element that guides an image of the target light flux to the examinee's eye so as to have an optically predetermined examination length, a calibration optical system disposed in an optical path of the light projecting optical system to change optical characteristics of the examinee's eye, a measurement unit that accommodates the light projecting optical system; a positional information acquiring portion that acquires positional information of the measurement unit, a correction amount setting portion that sets a correction amount for correcting a projection magnification of the target light flux projected to the examinee's eye, based on the positional information, and a correction portion that corrects the projection magnification of the target light flux based on the correction amount set by the correction amount setting portion.

公开(公告)号：US20190099072A1

公开(公告)日：2019-04-04

申请号：US16141096

申请日：2018-09-25

Applicant: NIDEK CO., LTD.

Inventor： Michihiro TAKII ,  Sasagu TACHIBANA ,  Masaki TANAKA ,  Yujiro TOCHIKUBO

IPC: A61B3/00 ,  A61B3/12 ,  A61B3/113 ,  A61B3/14 ,  A61B3/18 ,  A61B3/08

Abstract: An ophthalmic device includes an anterior ocular segment photographing unit, a fixation target display unit, and a processor. The anterior ocular segment photographing unit captures an anterior ocular segment image of at least one of a left eye and a right eye of a subject. The fixation target display unit displays a fixation target with respect to the at least one of the left eye and the right eye of the subject. The processor measures an eye position of the at least one of the left eye and the right eye of the subject by processing the anterior ocular segment image captured by the anterior ocular segment photographing unit. The processor generates eye position state information, which indicates a state of the eye position of the subject, based on measurement results of the eye position at least two timings including a post-switch timing and a pre-switch timing.