Kabushiki Kaisha Topcon

Yutaka Nishio

Hiroaki Okada

Kazuhiko Yumikake

Yasufumi Fukuma

Tsutomu Kikawa

Hisashi Tsukada

Hiroyuki Otsuka

A fundus oculi observation devicedivides a low-coherence light Linto a signal light LS and a reference light LR, superimposes the signal light LS propagated through a a fundus oculi Ef and the reference light LR propagated through a reference mirrorto generate and detect an interference light LC, and forms an OCT image of the fundus oculi Ef based on the result of the detection. The fundus oculi observation devicescans with the signal light LS while changing a scan interval when performing a series of scans with the signal light LS. Thus, it is possible to acquire a highly accurate image at small scan intervals from an attention site, and it is possible to reduce a scanning time by scanning at large intervals in other sites. Accordingly, it is possible to rapidly acquire a highly accurate image of an attention site.

Optical image measurement device and program for controlling the same

A device is an OCT device that splits a low-coherence light into a signal light and a reference light, detects an interference light obtained by superimposing the signal light propagated through an eye and the reference light propagated through a reference mirror, and forms an image of an fundus oculi. The device has a scan unit that scans the eye with the signal light. When a cross-section position is designated in an fundus oculi image, the device repetitively scans with the signal light along each cross-section position to repeatedly forms tomographic images at each cross-section position, thereby displaying a tomographic motion image at each cross-section position on a display. An operator can observe the tomographic motion image to designate the range and timing for measurement of a tomographic still image.

Optical image measurement device

LCDis provided for displaying an internal fixation target for fixating an eye E. Projection optical system (a part of an imaging optical system) is provided for projecting the displayed internal fixation target onto the a fundus oculi Ef. Image forming partis provided for forming 2-dimensional images (images of fundus oculi) Ef of the surface of fundus oculi Ef. Display partA is provided for displaying images of fundus oculi Ef. Operation partB is provided for specifying the position of the displayed images of fundus oculi Ef. Main controlleris provided for changing the projection position of the internal fixation target on the fundus oculi by changing the display position of the fixation target by the LCDbased on the specified position. The image forming partforms tomographic images of the fundus oculi Ef with the internal fixation target projected.

Fundus observation device

A fundus observation device is provided capable of capturing both images of the surface of the fundus oculi and tomographic images of the fundus oculi, and capable of preventing alignment indicators from being reflected in the image of the fundus oculi. Image forming partoperates to form surface images based on results of detecting the reflection light by the fundus oculi Ef of the illumination light obtained from a fundus camera unitA, and operates to form tomographic images based on results of detecting interference light LC by the OCT unit. The fundus camera unit comprises alignment optical systemsA andA, which project an alignment indicator. Detection timing controlling partB controls a fundus camera unit 1A and makes it detect the illumination light substantially simultaneously with detection of the interference light. Before the interference light LC and illumination light are substantially simultaneously detected, the alignment controlling partcontrols the alignment optical systemA andA and terminates the projection of the alignment light indicator. Correction processing partcorrects the image position of tomographic images using the surface images obtained substantially simultaneously.

Growing community of inventors

Fussa, Japan

Yutaka Nishio