JP2017144232A5

JP2017144232A5 -

Info

Publication number: JP2017144232A5
Application number: JP2016232938A
Authority: JP
Filing date: 2016-11-30
Publication date: 2019-12-05
Anticipated expiration: 2036-11-30

Description

上記目的を達成するため、本発明の一態様に係る眼科装置は、
測定光による被検眼の眼底の二次元走査であって、第一の方向の走査と前記第一の方向とは異なる第二の方向の走査とを含む二次元走査を繰り返して実行する走査手段と、
前記二次元走査される前記眼底からの前記測定光の反射光に基づいて前記眼底の二次元画像を生成する画像生成手段と、
前記二次元走査において、前記二次元画像の生成を目的とせずに前記眼底に照射される前記測定光の光量を、前記二次元画像の生成を目的として前記眼底に照射される前記測定光の光量よりも小さくするように制御する制御手段と、を備えることを特徴とする。

To achieve the above object, an ophthalmologic apparatus according to one embodiment of the present invention is provided.
A two-dimensional scanning of the eye to be examined eye bottom by the measurement light, a first direction of scanning with the first direction and the scanning means repeatedly executes the two-dimensional scanning including scanning of different second direction When,
Image generating means for generating a two-dimensional image of the fundus based on the reflected light of the measurement light from the fundus scanned two-dimensionally;
In the two-dimensional scanning, the amount of the measurement light emitted to the fundus without generating the two-dimensional image is used, and the amount of the measurement light emitted to the fundus for the purpose of generating the two-dimensional image. and control means for controlling to smaller than said Rukoto.

Claims

A two-dimensional scanning of the eye to be examined eye bottom by the measurement light, a first direction of scanning with the first direction and the scanning means repeatedly executes the two-dimensional scanning including scanning of different second direction When,
Image generating means for generating a two-dimensional image of the fundus based on the reflected light of the measurement light from the fundus scanned two-dimensionally;
In the two-dimensional scanning, the amount of the measurement light emitted to the fundus without generating the two-dimensional image is used, and the amount of the measurement light emitted to the fundus for the purpose of generating the two-dimensional image. the ophthalmic apparatus according to claim Rukoto and control means for controlling to less than.

The ophthalmologic apparatus according to claim 1, wherein the reciprocating scan speed in the second direction is slower than the reciprocating scan speed in the first direction.

Wherein the measuring light irradiation which are not intended to generate pre-SL two-dimensional image, between the end position of the two-dimensional scanning of a round to the start of the next round of the two-dimensional scanning, across said fundus ophthalmologic apparatus according to claim 1 or 2, characterized in that it comprises at least a radiation when the irradiation position of the measuring light is moved.

The scanning means is slower than the X-scanning speed of the X scanner that reciprocally scans the measurement light in the first direction in the two-dimensional scanning, and at least in the second direction perpendicular to the first direction. A Y scanner that reciprocally scans the measurement light at a speed,
Wherein said measuring beam radiation which are not intended to produce two-dimensional images, ophthalmic according to claim 1 or 2, characterized in that it comprises at least a morphism said measuring beam irradiation during the backward scan of scanning by the Y scanner apparatus.

In at least one of the first reciprocating scan and the last reciprocating scan by the X scanner in the second direction, the control unit is configured to emit light of the measurement light emitted to the fundus for the purpose of generating the two-dimensional image. The ophthalmologic apparatus according to claim 4 , wherein the amount of the measurement light is made smaller than that of the ophthalmic apparatus.

Further comprising a light receiving element for receiving the measurement light is disposed and the two-dimensional scanning is the area outside the scanning range of the measurement light in the fundus,
The light receiving element is used in generating the two-dimensional image, the ophthalmologic apparatus according to any one of claims 1 to 5, characterized in that a signal for correction of image distortion.

The control means irradiates the fundus with the light amount of the measurement light for the purpose of generating the two-dimensional image until the measurement light irradiates the light receiving element and returns to the two-dimensional scanning start position The ophthalmologic apparatus according to claim 6, wherein the ophthalmologic apparatus is controlled to be smaller than a light amount of the measurement light to be measured.

The speed of a two-dimensional scanning and a scanning different second direction and the first direction and the scan in the first direction by the measurement light of the eye ocular bottom, the second direction of the reciprocating scanning Scanning means for repeatedly performing two-dimensional scanning on the fundus that is slower than the speed of reciprocating scanning in the first direction ;
Image generating means for generating a two-dimensional image of the fundus based on the reflected light of the measurement light from the fundus scanned two-dimensionally ;
To the measurement light quantity of the previous SL backward scanning in the second direction is irradiated to the fundus is less than the amount of the measurement light irradiated to the fundus in said second direction forward scan the ophthalmic apparatus according to claim Rukoto and control means for controlling the.

Wherein, the second direction of the measurement light measurement light scanned at least one in the portion changed from the backward of the backward portion and the switch to scan the scanning from the forward scan in the scan of the forward in the scanning of The ophthalmic apparatus according to claim 8, wherein the amount of light is controlled to be smaller than the amount of measurement light irradiated to the fundus in the forward scanning .

10. The control unit according to claim 1, wherein in the control to reduce the light amount of the measurement light, the control unit controls a light source that emits the measurement light to cause the measurement light to be extinguished or dimmed. The ophthalmic apparatus according to item 1 .

10. The control unit according to claim 1, wherein, in the control to reduce the light amount of the measurement light, the control unit performs insertion / removal of a shutter that blocks or reduces the measurement light into / from the optical path of the measurement light. the ophthalmic apparatus according to any one.

A fixation lamp that generates fixation light;
The fixation light is configured to irradiate the fundus of the eye to be examined through the scanning unit,
The control means controls lighting of the fixation lamp so as to interlock with scanning by the scanning means,
12. The control unit according to claim 1, wherein the control unit performs control so that the measurement light is not irradiated on the fundus, thereby reducing the amount of the measurement light irradiated on the fundus. 13. the ophthalmic apparatus according to any one.

The scanning means includes a resonant scanner for scanning the measurement light in the first direction and a galvano scanner for scanning the measurement light in the second direction. The ophthalmologic apparatus according to any one of 1 to 12.

An anterior ocular segment observation optical system for obtaining an image of the anterior segment of the eye to be examined;
The ophthalmologic apparatus according to claim 1, further comprising a branching unit that branches an optical path of the anterior ocular segment observation optical system from an optical path in which the scanning unit is arranged.

The display control means for causing the display means to display the two-dimensional image repeatedly generated based on the reflected light obtained by repeatedly executing the two-dimensional scan as a preview image. The ophthalmologic apparatus of any one of thru | or 14.

A two-dimensional scanning of the eye to be examined eye bottom by the measurement light, is repeatedly executed by the scanning means the two-dimensional scanning including scanning of different second direction to the first direction and the scanning in the first direction And the process of
Generating a two-dimensional image of the fundus based on reflected light of the measurement light from the fundus that is two-dimensionally scanned;
In the two-dimensional scanning, the amount of the measurement light emitted to the fundus without generating the two-dimensional image is used, and the amount of the measurement light emitted to the fundus for the purpose of generating the two-dimensional image. And a control method for controlling the ophthalmologic apparatus to be smaller than that of the ophthalmologic apparatus.

The speed of a two-dimensional scanning and a scanning different second direction and the first direction and the scan in the first direction by the measurement light of the eye ocular bottom, the second direction of the reciprocating scanning Repetitively executing a two-dimensional scan slower than the reciprocating scan speed in the first direction on the fundus by a scanning means;
Generating a two-dimensional image of the fundus based on reflected light of the measurement light from the fundus that is two-dimensionally scanned ;
To the measurement light quantity of the previous SL backward scanning in the second direction is irradiated to the fundus is less than the amount of the measurement light irradiated to the fundus in said second direction forward scan And a control method for controlling the ophthalmic apparatus.

A program for causing a computer to execute each step of the method for controlling an ophthalmologic apparatus according to claim 16 or 17 .