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Ophthalmologic apparatus and control method therefor

A kind of equipment, ophthalmology technology, applied in the direction of eye testing equipment, ophthalmoscope, medical science, etc., can solve the problems of difficult, time-consuming, and reduced accuracy of eyeball measurement

Inactive Publication Date: 2012-07-04
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the scanning type fundus imaging apparatus performs scanning, so there is a problem that it takes time to capture an image, and the measurement of the movement of the eyeball becomes difficult or the accuracy decreases as time passes.

Method used

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  • Ophthalmologic apparatus and control method therefor
  • Ophthalmologic apparatus and control method therefor
  • Ophthalmologic apparatus and control method therefor

Examples

Experimental program
Comparison scheme
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no. 1 example

[0034] Hereinafter, a first embodiment of the present invention will be described.

[0035] In the example described in this embodiment, after the fundus image is acquired and a plurality of feature points (also referred to as "multiple feature images") are extracted, the fundus area to be scanned is set, so that the eyeball can be measured at high speed. sports.

[0036] The overall structure of the device

[0037] The fundus imaging apparatus of the present embodiment includes scanning laser ophthalmoscope (SLO) imaging means and control means.

[0038] SLO Camera Parts

[0039] refer to figure 1 The optical structure of the SLO imaging unit will be described.

[0040] As the laser light source 101, a semiconductor laser or a superluminescent diode (SLD) light source can be suitably used. As for the wavelength to be used, in order to reduce glare of the subject and maintain resolution at the time of fundus observation, a near-infrared wavelength region in the range ...

no. 2 example

[0063] Hereinafter, a second embodiment of the present invention will be described.

[0064] In the example described in this embodiment, after the fundus image is acquired to extract the feature points, the area to be scanned is set, thereby enabling high-speed measurement of the movement of the eyeball. At the same time, by providing feedback to an optical coherence tomography (OCT) device, OCT images with high image quality (three-dimensional images with small positional shifts) are obtained.

[0065] The overall structure of the device

[0066]The fundus imaging device of this embodiment includes OCT imaging means, SLO imaging means, and control means. Each component will be described in detail below.

[0067] Optical structure of OCT imaging components

[0068] refer to Figure 11 The optical configuration of the OCT imaging unit of this embodiment will be described.

[0069] As the low-coherence light source 1101, a superluminescent diode (SLD) light source or a...

no. 3 example

[0096] A third embodiment of the present invention will be described below.

[0097] The third embodiment relates to a mode of a fundus imaging apparatus including: a setting unit for acquiring a fundus image, extracting a plurality of feature images, and setting a feature image containing a plurality of feature images in the imaging area. a partial area of ​​at least one characteristic image; a partial image acquiring unit for acquiring an image of the set partial area by scanning the set partial area with measurement light; and a measuring unit for measuring movement of the fundus by template matching, Wherein, in the template matching, similarities between the multiple feature images and the image of the partial region are searched for and judged.

[0098] In the example described in this embodiment, after a plurality of feature points are extracted, an area to be scanned is set, thereby enabling high-speed measurement of the movement of the eyeball. At the same time, by p...

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PUM

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Abstract

The invention relates to an ophthalmologic apparatus and a control method therefore. In order to solve problems that it takes time to take an image due to scanning and that measurement of a movement of an eyeball becomes difficult or less accurate with a lapse of time, which are inherent in a scanning-type fundus image photographing apparatus, there is provided a control method for an ophthalmologic apparatus, including: acquiring a fundus image by scanning a photographing area of a fundus with measuring light; extracting a characteristic point from the acquired fundus image; setting, in the photographing area, a partial area containing the characteristic point; acquiring an image of the partial area by scanning the partial area with the measuring light; and detecting a movement of the fundus by executing template matching based on the characteristic point and the image of the partial area.

Description

technical field [0001] The present invention relates to an ophthalmic device and a control method for the ophthalmic device, in particular to an ophthalmic device for measuring eyeball movement and a control method for the ophthalmic device. Background technique [0002] In recent years, devices for measuring eye movements have received increasing attention. The reason for this attention is that if the movement of the eyeballs can be measured, the measurement results can be applied to visual field examinations, fundus imaging devices that require higher-resolution images, etc., thereby enabling more accurate fundus examinations. [0003] There are various methods for measuring the movement of the eyeball such as a corneal reflection method (Purkinje image) and a search coil method. Among these methods, various studies have been conducted on a method for measuring the movement of the eyeball based on a fundus image with less burden on the subject. [0004] In order to measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/113A61B3/12A61B3/14
CPCA61B3/10A61B3/102A61B3/1025A61B3/113A61B3/18
Inventor 牧平朋之
Owner CANON KK
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