JPH07178057A - Ophthalmology system - Google Patents

Abstract

PURPOSE:To discriminate easily which part in the eyeground the photographed eyeground image is, by providing an angle detecting means to detect the angle formed by the optical axis of a photograph optical system and a standard axis, and a recording means to record the detected angle together with the eyeground image. CONSTITUTION:A joy stick is pushed, and a halogen lamp 26 is lighted to illuminate the eyeground Er, and at the same time, a solenoid 69 is driven, a quick return mirror 51 is spring up, and an eyeground image is taken on a film 35. The eyeground image taken by a camera element 43 is stored in a recording device. In this recording device, the photographing angle (00, 00) is recorded as a composed image together with the eyeground image, and when the main body is rotated and the optical axis 200a of a photograph optical system 200 is converted to the left side from the center of the eyeground, the photograph angle in the horizontal direction of the main body is from the output of an encoder linking to the rotation, by a control device, and the angle is displayed on a display as (-30, 00).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus in which a main body is movably provided so that an optical axis of a photographing optical system for photographing an eye to be examined can be set at an arbitrary angle with respect to a preset reference axis.

[0002]

2. Description of the Related Art Conventionally, when imaging a fundus with an ophthalmologic apparatus,
Since it is not possible to image the entire fundus with a single image capture,
The entire body of the fundus is photographed while gradually changing the orientation of the body equipped with the photographing optical system vertically or horizontally.

Then, a panoramic image is created by combining these photographed individual fundus images, and the fundus is diagnosed from this panoramic image.

[0004]

However, it is impossible to know which part of the fundus is photographed for each photographed fundus image. Therefore, a panoramic image must be created by deciding a part based on the shape and flow of the imaged blood vessel, which causes a problem that the panoramic image is very troublesome to create.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an ophthalmologic apparatus capable of identifying a region to be imaged.

[0006]

In order to achieve the above object, the invention of claim 1 has a main body having a photographing optical system for photographing an eye to be inspected, and an optical axis of the photographing optical system is preset. In an ophthalmologic apparatus in which the main body is movably provided so that it can be set at an arbitrary angle with respect to a reference axis line, an angle detection means for detecting an angle formed by the optical axis of the photographing optical system and the reference axis line, and this angle detection A recording means for recording the angle detected by the means together with the fundus image is provided.

According to a second aspect of the present invention, there is provided a main body having a photographing optical system for photographing the fundus, and the optical axis of the photographing optical system can be set at an arbitrary angle with respect to the optical axis of the eye to be examined. In an ophthalmologic apparatus in which the main body is movably provided, an angle detection unit that detects an angle formed by the optical axis of the photographing optical system and a reference axis line, and an angle detected by the angle detection unit are recorded as a fundus image. It is characterized in that a writing means for writing on paper is provided.

According to another aspect of the present invention, there is provided a main body having a photographing optical system for photographing the eye to be inspected, and an illumination optical system for illuminating the eye to be inspected, and the optical axis of the photographing optical system is a preset reference axis. In the ophthalmologic apparatus in which the main body is movably provided so that the optical axis of the illumination optical system can be set to an arbitrary angle with respect to the reference line with respect to the light of the photographing optical system. First angle detecting means for detecting an angle formed by the axis and the reference axis, and second angle detecting means for detecting an angle formed by the optical axis of the illumination optical system and the reference axis.
Recording means for recording the angle detected by the first and second angle detecting means together with the fundus image is provided.

[0009]

Embodiments of the ophthalmologic apparatus according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a base base, and an axis 2 is erected on one end side of the base base 1. An axis 2a of the axis 2 passes through a point P of a pupil of an eye E to be examined. Is set. An arm member 3 is provided on the shaft 2 so as to be rotatable about an axis 2a, and a scale (display means) 4a is provided on the upper part of the shaft 2 so that the rotation angle of the arm member 3 can be read.
A scale member 4 with a mark is provided, and a main body 1 described later is provided.
The rotation angle of 0 in the horizontal direction can be read. Further, the arm member 3 is provided with an encoder (angle detection means) 5 for detecting the rotation angle of the arm member 3. The encoder 5 generates a pulse each time the arm member 3 rotates by a small angle.

A curved guide rail 6 is provided on the arm member 3.
Is provided, and the guide rail 6 is curved with a curvature centered on the point P. A guide member 7 movable along the guide rail 6 is attached to the guide rail 6, and a main body 10 of the ophthalmologic apparatus is fixed to the guide member 7. As a result, when the guide member 7 is moved along the guide rail 6, the main body 10 rotates about the point P. The guide member 7 is provided with an encoder (angle detection means) 8 for detecting the rotation angle of the main body 10. The encoder 8 generates a pulse each time the main body 10 makes a minute angle rotation.

Further, the guide rail 6 is provided with a scale 6a so that the rotation angle of the main body 10 in the vertical direction can be read. Reference numeral 9 is a spring that supports the main body 10, and 11 is a joystick switch. Reference numeral 12 is a chin rest, 13 is an external fixation target composed of a light emitting diode attached to the tip of the first arm 14, and the external fixation target 1
3 can be moved in any position, that is, in a three-dimensional direction by the first and second arms 14 and 15.

The optical system shown in FIG. 2 is arranged in the main body 10. This optical system includes an illumination optical system 100 for illuminating the fundus Er of the eye E to be inspected and a photographing optical system 2 for photographing the fundus Er.
00 and.

The illumination optical system 100 includes a halogen lamp 24 as a light source for observation, a condenser lens 25, a xenon lamp 26 as a photographing light source, a condenser lens 27,
Ring diaphragm 28, reflection mirror 29, relay lens 3
0, a perforated mirror 31, and an objective lens 32. The objective lens 32 is provided in the objective lens barrel 37 provided in the main body 10.

The photographing optical system 200 includes an objective lens 32,
It has a focusing lens 33 and an image forming lens 34 for forming an image of the fundus on the film 35. In addition, the photographing optical system 2
00 includes a TV camera photographing system 40 and a finder optical system 5.
0 and are provided. The TV camera photographing system 40 has a half mirror 41, a reflection mirror 42, and an image pickup element 43 arranged at a conjugate position with the fundus, and a finder optical system 50.
Is a quick return mirror 51 and field lens 5
2, a reflection mirror 53, and an eyepiece lens 54.
The eyepiece lens 54 is provided in the eyepiece tube 38 provided in the main body 10, and the fundus can be observed through the eyepiece lens 54.

Further, the photographing optical system 200 includes a display 55.
An imaging lens 56 and a mirror 57 are provided. The display 55 displays the angle formed by the optical axis 200a of the photographing optical system 200 and a preset reference axis Eo (see FIG. 6), that is, the photographing angle. The reference axis line Eo is the optical axis 2 of the photographing optical system 200 when the main body 10 is horizontal and faces directly in front of the eye E in this embodiment.
00a is set as the reference axis line Eo (see FIG. 6).

The display 55 is provided at a conjugate position with the film 35, and the photographing angle displayed on the display 55 is imprinted on the film 35.

The display 55 has display portions 55a and 55b made of light emitting diodes. These display portions 55a and 55b look as shown in FIG. 3 when viewed through the eyepiece lens 54, and do not hinder the observation of the fundus. The display 55 and the mirror 57 are arranged at the position. The display 55 may be arranged so as to be displayed at the position indicated by the broken line. Thereby, the display can be enlarged due to the aspect ratio of the monitor 61.

The display unit 55a has an angle between the optical axis 200a of the photographing optical system 200 and the reference axis Eo in the horizontal direction and the optical axis 200a of the photographing optical system 200 in the vertical direction.
The angle between the reference axis line Eo and the reference axis line Eo is displayed, and the display section 55b displays the shooting angle taken last time.

FIG. 4 is a block diagram showing the configuration of the control system of the ophthalmologic apparatus. In FIG. 4, 61 is a monitor that displays the rotation angle of the main body 10 together with the fundus image captured by the image sensor 41, and 62 records the fundus image captured by the image sensor 41 and the shooting angle each time the joystick switch 11 is pressed. Recording device, 63 is a solenoid for flipping up a quick return mirror, 64 is a keyboard for inputting various commands, and 65 is a joystick switch or keyboard 6
The control device controls the driving of the solenoid 63, the lighting of the halogen lamp 24 and the xenon lamp 26, the display of the display 55, etc. based on the operation of 4.

Next, the operation of the embodiment configured as described above will be described.

First, as shown in FIGS. 1 and 6, the camera body 10 is positioned at a position where the body 10 is horizontal and faces straight ahead, and the halogen lamp 24 is turned on. In this state, the rotation angles of the camera body 10 in the horizontal direction and the vertical direction are zero. That is, the angle formed between the reference axis Eo and the optical axis 200a of the photographing optical system 200 is zero in both the horizontal and vertical directions, and the display 5
“00,00” is displayed on the display unit 55a of No. 5. Then, the external fixation target 13 is moved to a predetermined position to guide the eye E to be examined in a predetermined direction.

Next, the joystick switch 11 is pushed. As a result, the halogen lamp 26 emits light and the fundus E
While r is illuminated, the solenoid 63 is driven and the quick return mirror 51 is flipped up to capture a fundus image on the film 35. After this, the quick return mirror 51 returns to the original position.

Since the photographing angle is zero here, the central portion E1 of the fundus Er shown in FIG. 5 is photographed.

On the other hand, when the joystick switch 11 is pressed, the fundus image captured by the image sensor 43 is recorded in the recording device 62. In the recording device 62, a photographed image (see FIG. 3) in which the photographing angle “00,00” is combined is recorded together with the fundus image. Further, the shooting angle is recorded as data corresponding to the shot image.

Next, the main body 10 is rotatively moved to, for example, the position shown by the chain line in FIG. 6 to move the optical axis 200a of the photographing optical system 200.
To the left from the center of the fundus. At this time, the encoder 5 generates a number of pulses corresponding to the rotational movement amount,
The control device 65 counts the number to obtain the photographing angle (the angle formed by the reference axis Eo and the optical axis 200a of the photographing optical 200) of the main body 10 on the horizontal direction, and the angle is displayed on the display unit of the display 55. It will be displayed on 55a. Here, in the case of being moved to the right by 30 degrees, for example, “−30,0
"0" is displayed. When the image is taken in this state, the part E2 which is displaced to the left from the center of the fundus Er shown in FIG. 5 is imaged.

Similarly, the main body 10 is moved leftward by, for example, 3
When it is moved 0 degrees, the display 55a displays “+30,0
A region E3 displayed as "0" and shifted to the right from the center of the fundus Er shown in FIG. 5 is photographed.

When the main body 10 is moved vertically,
The encoder 8 generates a number of pulses corresponding to the rotation amount, the control device 65 counts the number and obtains the vertical photographing angle of the main body 10, and the photographing angle is displayed on the display unit 55a of the display 55. Will be displayed. For example, body 1
If 0 is moved upward and the vertical shooting angle is 30 degrees (downward angle), the display unit 55a displays "00, -3.
If "0" is displayed and the vertical shooting angle is +30 degrees (upward angle), "00, + 30" is displayed on the display unit 55a.
Is displayed.

Then, when "00, -30" is displayed on the display 55a, a region E4 which is shifted downward from the center of the fundus Er shown in FIG. 5 is photographed, and "55" is displayed on the display 55a. When "00, + 30" is displayed, the part E5 of the fundus Er shown in FIG.

Since the photographing angle displayed on the display section 55a of the display 55 is photographed on the film 35 together with the fundus image, it is easy to know which fundus image is which part of the fundus, and the panoramic image creation operation is possible. Can be done easily.

In addition, the display portions 55a and 55b of the display 55.
Can be seen together with the fundus when viewed through the eyepiece lens 54 as shown in FIG.
Even if 0 is rotationally moved, its rotation angle can be known, and it is not necessary to take a look away from the fundus Er to check, which is convenient.

Since the photographing angle is recorded in the fundus image recorded in the recording device 62 together with this fundus image, the composing work becomes easy when composing the panoramic images.

When shooting at the same shooting angle as before,
The shooting angle data recorded in the recording device 62 is read out and displayed on the display section 55b of the display 55, so that the shooting angle displayed on the display section 55b and the shooting angle displayed on the display section 55a match. It suffices to move the main body 10 vertically and vertically to shoot.

Further, the main body 10 is vertically and horizontally moved by a pulse motor, and the pulse motor is controlled on the basis of the photographing angle data taken last time, whereby the main body 10 is automatically photographed last time. You may be able to move to the position.

Further, if the position of the external fixation target 13 is detected and this position is also recorded as data, it is more accurate if the external fixation target 13 is moved to the position of the previous shooting at the time of the next shooting. It is possible to shoot the same part that was previously shot at the same shooting angle. The position of the external fixation target 13 is the first,
The rotation angle of the second arm may be detected.

In this way, it is possible to shoot at the same shooting angle that was taken last time, and it becomes easy to observe changes over time.

In the above embodiment, the photographing angle is combined with the fundus image and stored in the recording device 62.
When the fundus image is printed out, the photographing angle may be printed on the fundus image.

Further, although the fundus camera has been described in the above embodiment, it is needless to say that it can be applied to a slit lamp. In the case of the slit lamp, since the illumination angle of the illumination optical system in addition to the photographing optical system can be changed, the illumination angle is detected, and this angle is also recorded and displayed. As a result, it is possible to shoot at the same shooting angle as the previous shooting and at the same lighting angle as the previous lighting angle.

[0039]

According to the present invention, it is possible to easily know which part of the fundus the photographed fundus image is, and the panoramic image can be easily created. In addition, since the image can be taken at the same shooting angle as the previous shooting, it is easy to observe the change over time.

[Brief description of drawings]

FIG. 1 is a side view showing an appearance of an ophthalmologic apparatus according to the present invention.

FIG. 2 is an optical layout diagram showing the layout of the optical system of the ophthalmologic apparatus.

FIG. 3 is an explanatory diagram showing a fundus and a display as seen through an eyepiece lens.

FIG. 4 is a block diagram showing a configuration of a control system of the ophthalmologic apparatus.

FIG. 5 is an explanatory diagram showing an imaging region of a fundus.

FIG. 6 is a plan view showing a rotation state of the main body in the horizontal direction.

[Explanation of symbols]

 5 Encoder (angle detection means) 8 Encoder (angle detection means) 10 Main body 62 Recording device 200 Imaging optical system

Claims (3)

[Claims] 1. A main body having a photographing optical system for photographing an eye to be inspected, and the main body is movable so that an optical axis of the photographing optical system can be set at an arbitrary angle with respect to a preset reference axis. In the ophthalmologic apparatus provided in, the angle detection means for detecting the angle formed by the optical axis of the photographing optical system and the reference axis, and the recording means for recording the angle detected by the angle detection means together with the fundus image. Ophthalmic device characterized by. 2. A body having a photographing optical system for photographing the fundus of the eye, wherein the main body is movable so that the optical axis of the photographing optical system can be set at an arbitrary angle with respect to the optical axis of the eye to be examined. In the provided ophthalmologic apparatus, the angle detection means for detecting the angle formed by the optical axis of the photographing optical system and the reference axis line, and the angle detected by this angle detection means are written on the recording paper showing the fundus image. An ophthalmologic apparatus comprising means. 3. A main body having a photographing optical system for photographing an eye to be inspected, and an illumination optical system for illuminating the eye to be inspected, wherein an optical axis of the photographing optical system is arbitrary with respect to a preset reference axis line. In an ophthalmologic apparatus in which the main body is movably provided so that it can be set to an angle, and the optical axis of the illumination optical system can be set to an arbitrary angle with respect to the reference line, an optical axis of the photographing optical system and a reference axis line Angle detecting means for detecting an angle formed by the first optical axis, a second angle detecting means for detecting an angle formed by the optical axis of the illumination optical system and a reference axis, and an angle detected by the first and second angle detecting means. An ophthalmologic apparatus comprising: a recording unit configured to record the image and the fundus image.