JP2003019117A - Fundus camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily guide an optometrical eye, to quickly specify a photographing desired place on an image screen, and to quickly guide the eye in that direction. SOLUTION: This fundus camera has an observing photographing optical system 13 for observing and photographing the eyeground of the optometrical eye E, an internal fixation target projection optical system 10 for projecting an internal fixation target on the eyeground for guiding and fixing the optometrical eye E, a telecamera 23 arranged in the observing photographing optical system 13, and receiving an eyeground image of the optometrical eye, and a television monitor 29 for displaying the eyeground image so that an eyeground part looking at the internal fixation target is reflected in the image screen center on the eyeground image by inputting image receiving output from this telecamera 23. The television monitor 29 is a touch panel type. The television monitor 29 has a movement control means (a control part 30) for moving the internal fixation target so that a designated specific place becomes the image screen center by inputting a coordinate value of the specific place to the origin when setting a coordinate system with coordinates of the image screen center as the origin, and designating the specific place of the eyeground image displayed on the television monitor 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fundus camera for inspecting a fundus of an eye to be examined.

[0002]

2. Description of the Related Art Conventionally, a fundus camera has an observation and photographing optical system for observing and photographing a fundus of an eye to be examined and an internal fixation target for guiding and fixing the eye to be examined. An internal fixation target projection optical system, an imaging unit provided in the observation and photographing optical system for receiving an image of the fundus of the eye to be examined, and an image reception output from the imaging unit is input to the fundus at a position conjugate with the internal fixation target. There is known a television monitor that displays an image of the fundus so that the region is displayed in the center of the screen.

[0003]

However, in the conventional fundus camera, the internal fixation target is moved to guide the eye to be inspected by the operation of the control lever provided on the head of the joystick. Even if it is known on the screen of the TV monitor which fundus part should be centered, the eye to be examined does not always follow the guidance of the internal fixation target, and it is not possible to follow the guidance of the eye. Since the fundus image changes from moment to moment, it is difficult to guide the subject's eye so that the center position of the fundus portion to be photographed is located at the center of the screen while viewing the image of the fundus on the screen.

The degree of movement of the fundus, that is,
The operation needs to be performed while confirming that the fundus portion to be placed in the center of the screen is still displaced from the center of the screen or is not overshooting, fine adjustment is required, and the work is complicated.

The present invention has been made in view of the above-mentioned problems of the prior art. The purpose of the present invention is to easily guide the eye to be inspected, and to quickly specify a position on the screen to be photographed and determine its direction. An object of the present invention is to provide a fundus camera capable of promptly guiding to.

[0006]

A fundus camera according to claim 1 comprises an observation and photographing optical system for observing and photographing a fundus of an eye to be examined,
An internal fixation target projection optical system for projecting an internal fixation target for guiding and fixing the eye to be examined onto the fundus, and an image of the fundus of the eye to be examined provided in the observation and photographing optical system. An image pickup means for receiving an image, and a television monitor for displaying a fundus image by inputting an image output from the image pickup means so that the fundus image of the fundus of the eye and the conjugate position of the fundus image are displayed in the center of the screen. In the fundus camera provided, the television monitor has a touch panel, the television monitor has a coordinate system whose origin is the coordinates of the center of the screen, and a specific portion of the image of the fundus displayed on the television monitor. Is specified, the coordinate value of the specific position with respect to the origin is input, and the internal fixation target is moved so that the specified specific position is in the center of the screen. The fundus camera of the present invention according to claim 2 is further characterized in that the internal fixation target continuously moves.

[0007]

1 is a schematic view of a fundus camera according to an embodiment of the present invention.

In this figure, reference numeral 1 is a base on which a pedestal 2 is mounted so as to be movable in the front-rear and left-right directions. The gantry 2 is provided with a joystick 3, and by operating the joystick 3, the gantry 2 can be moved in the front, rear, left, and right directions.
Reference numeral 3'denotes a control lever provided on the head of the joystick 3.

A column 4 is erected on the base 1, a chin rest 5 is provided on the column 4, and an external fixation lamp 6 is provided at the upper end of the column 4.

Reference numeral 7 denotes a camera body, which is mounted on the gantry 2. The main body 7 has an illumination optical system 8, an observation / photographing optical system 9, and an internal fixation target projection optical system 10.

The illumination optical system 8 includes an observation light source 9 composed of a halogen lamp, a photographing light source 11 composed of a xenon lamp, and a first light source.
The lens optical system 13, the mirror 14, and the second lens optical system 15
And have. The illumination light of the light sources 11 and 12 passes through the first lens optical system 13, is reflected by the mirror 14, and
The light passes through the lens optical system 15, is reflected by the perforated mirror 16, and is guided to the fundus of the eye E through the objective lens 17 to illuminate the fundus.

The observation / photographing optical system 9 is a focusing lens optical system 18.
The zoom lens optical system 18 'has a flip-up mirror 19, a movable mirror 20, a field lens 21, and a mirror 22. The reflected light from the eye E to be examined passes through the objective lens 17, the perforated mirror 16, and the half mirror 28,
It passes through the focusing lens optical system 18 and the zoom lens optical system 18 ′, is reflected by the flip-up mirror 19, is guided to the movable mirror 20, is reflected by this movable mirror 20, and is guided to the eyepiece lens 24 section. The operator is the eyepiece section 2
By looking through 4, the fundus of the eye E can be observed.

When the movable mirror 20 is in the state shown by the chain double-dashed line retracted from the optical path, the light from the flip-up mirror 19 is guided to the TV camera 23 via the field lens 21 and the mirror 22, and is directed to the TV camera 23. The fundus image of the eye E is received.

When the flip-up mirror 19 is in the state shown by the chain double-dashed line retracted from the optical path, the light from the fundus is photographic camera 2
The photograph fundus of the subject's eye E is photographed by the photograph camera 25.

The internal fixation target projection optical system 10 includes an internal fixation lamp 2
6 and a projection lens 27. The internal fixation lamp 26 is provided at a conjugate position with the fundus of the eye E to be examined, and the fixation target light from the internal fixation lamp 26 is reflected by the half mirror 28 and passes through the perforated mirror 16 to reach the eye E to be examined. The eye E is projected as a fixation target and the eye E is guided by the fixation target. The observation / imaging is performed in a state where the eye E is fixed on the fixation target.

A touch panel monitor 29 is provided on the front surface of the main body 7. This touch panel monitor 29
Displays the fundus of the eye E to be inspected by the video signal from the television camera 23, and has an operation panel on the screen, on which an XY coordinate system whose origin is O (0,0) is set. , Touch the screen to output the coordinate values.

FIG. 2 shows a control system for the internal fixation lamp projection optical system 10 and the touch panel type monitor 29. In FIG. 2, a video signal from the television camera 23 is supplied to the touch panel monitor 29 through the control unit 30, and a fundus image is displayed. When the fundus of the touch panel monitor 29 is touched, a coordinate value signal corresponding to the touch position is supplied to the control unit 30, and the control unit 30 internally fixes the touch position to the central position (coordinate origin). The optotype projection optical system 10 is moved and controlled to guide the technical examination eye E.

As a result, the eye E to be examined is guided so that the fundus oculi designated by the internal fixation target is located at the center of the screen.

For example, the touch panel monitor 29 is shown in FIG.
It is assumed that it is as shown in (A). In this display, the optic disc 32, the blood vessel 33, and the macula 34 are displayed. Here, O (0,0) is the center position of the screen. Now, assume that the coordinates P (X, Y) on the screen are touched. Then, the coordinate value signal is input to the control unit 30,
As shown in FIG. 3B, the control unit 30 drives the internal fixation target projection optical system 10 so that the fundus portion of the coordinates P (X, Y) in FIG. 3A is located at the center on the screen. Control. That is, using the screen shown in FIG. 3 (A),
The fixation target is moved in the direction of the line segment vector A connecting the origin O (0, 0) and the coordinate value P (X, Y). As a result, the eye E to be inspected is guided by the light from the internal fixation lamp 26, and the nipple 32 and the macula 33 move diagonally downward to the left as shown in FIG.
The designated fundus region is located at the center of the screen.

As described above, in this embodiment, the touch panel monitor 29 is used, and the monitor 29 has a coordinate system whose origin is the coordinates of the center of the screen and specifies the image of the fundus displayed on the monitor 29. When the location is specified, the coordinate value of the specific location with respect to the origin is input, and the control unit 30 moves the internal fixation target so that the designated specific location is in the center of the screen. In addition, it is possible to quickly specify the location on the screen to be photographed and quickly guide in that direction.

The fundus camera of the present invention is further shown in FIG.
The fixation target position corresponding to the angle of view is stored in the memory 31 shown in FIG. 3, and the control unit 30 calls the stored contents by operating a reset switch (not shown) and moves the internal fixation target to the stored position. You can also let it.

[0022]

As described above, according to the present invention, it is possible to easily guide the eye to be inspected, and to quickly specify a portion on the screen to be photographed and guide it in that direction.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a fundus camera according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control unit of an internal fixation lamp.

FIG. 3 is a diagram illustrating movement control of an internal fixation lamp on a screen of a touch panel monitor.

[Explanation of symbols]

10 ... Internal fixation target projection optical system 29 ... Touch panel monitor 30 ... Control unit

Claims (2)

[Claims] 1. An observation and photographing optical system for observing and photographing a fundus of an eye to be examined, and an internal fixation target projection optics for projecting an internal fixation target for guiding and fixing the eye to the fundus. System, an image pickup means provided in the observation and photographing optical system for receiving an image of the fundus of the eye to be inspected, and an image receiving output from the image pickup means is inputted to display a screen of a fundus site conjugate with the internal fixation target. In a fundus camera including a television monitor that displays the image of the fundus so as to be displayed in the center, the television monitor has a touch panel, and the television monitor has a coordinate system whose origin is the coordinates of the center of the screen. When a specified position of the image of the fundus that is set and displayed on the television monitor is specified, the coordinate value of the specified position with respect to the origin is input so that the specified position becomes the center of the screen. Inside Fundus camera, characterized in that it comprises a movement control means for moving the target. 2. The fundus camera according to claim 1, wherein the internal fixation target continuously moves.