JPH05329108A - Ophthalmologic apparatus - Google Patents

Abstract

PURPOSE:To obtain an ophthalmologic apparatus which enables the photographing of eyegrounds at the same angle again by providing a display means to display an angle between a main body with a photographing optical system for photographing the eyegrounds and an optical axis of an eye to be inspected to allow the learning of an angle of the main body with the optical axis of the eye to be inspected. CONSTITUTION:An axis line 2a of a shaft 2 is so set as to pass at a point P of the anterior ocular segment of an eye E to be inspected. An arm member 3 is provided on the shaft 2 rotatably about an axis line 2a while a scale member 4 with a graduation 4a is provided on an upper part of the shaft 2. Therefore, an angle of rotation of the arm member 3, namely, the horizontal angle of rotation of the main body 10 can be read out. In addition, a guide rail 6 curved with a curvature centered on the point P is disposed on the arm member 3 and is provided with graduations to allow the reading of the horizontal angle of rotation of the main body 10. Thus, the eyegrounds can be photographed from the same angle again thereby enabling the observing of the eyegrounds simply with the passage of time.

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 a fundus can be set at an arbitrary angle with respect to an optical axis of an eye to be examined.

[0002]

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

[0003]

However, there is a problem in that the angle of the main body with respect to the optical axis of the eye to be examined cannot be known and the angle cannot be grasped. In addition, the fundus cannot be imaged again from the same angle, which is very inconvenient when observing the fundus with time.

The present invention has been made in view of the above problems, and an object thereof is to provide an ophthalmologic apparatus capable of knowing the angle of the main body with respect to the optical axis of the eye to be inspected and taking the fundus again at the same angle. To do.

[0005]

In order to achieve the above-mentioned object, the present invention has a main body provided with a photographing optical system for photographing the fundus, and the optical axis of the photographing optical system is relative to the optical axis of the eye to be examined. In the ophthalmologic apparatus in which the main body is movably provided so that the main body and the optical axis of the eye to be inspected can be set to an arbitrary angle, display means is provided.

Further, it has a main body equipped with a photographing optical system for photographing the fundus, and 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. The provided ophthalmologic apparatus is characterized in that an angle detecting means for detecting an angle formed by the main body and the optical axis of the eye to be inspected and a display means for displaying an angle detected by the angle detecting means are provided.

[0007]

According to the present invention, the display means displays the angle between the main body and the optical axis of the eye to be inspected.

The angle detecting means detects the angle formed by the main body and the optical axis of the eye to be inspected, and the display means displays the angle detected by the angle detecting means.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an 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 a shaft 2 is erected on one end side of the base base 1. An axis 2a of the shaft 2 is a point P on the anterior segment of the eye E to be examined. Is set to pass through. An arm member 3 is provided on the shaft 2 so as to be rotatable around an axis 2a, and a scale (display means) 4 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 marked with a is provided so that the horizontal rotation angle of the main body 10 described later can be read. Further, the arm member 3 is provided with an encoder (angle detecting 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.

The guide rail 6 is provided with a scale (display means) 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.

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

The illumination optical system 100 includes a halogen lamp 24 as an observation light source, 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 on the objective lens barrel 37 provided on the main body 10.

The photographing optical system 200 includes an objective lens 32 and
It has a focusing lens 33 and an image forming lens 34 for forming an image of the fundus on the film 35. Also, 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 reflecting mirror 53, and an eyepiece lens 54.
The eyepiece lens 54 is provided on the eyepiece tube 38 provided on the main body 10, and the fundus can be observed through the eyepiece lens 54.

The finder optical system 50 is provided with a display device (display means) 55 for displaying the horizontal rotation angle and the vertical rotation angle of the main body 10 at a conjugate position with the film 35. The display 55 has display parts 55a to 55c made of light emitting diodes and analog display parts 55d and 55e made of light emitting diodes. These display parts 55a to 55e are shown on the fundus when viewed through the eyepiece lens 54 as shown in FIG. It is placed in a position that does not interfere with observation.

The display unit 55a displays the horizontal rotation angle of the main body 10, the display unit 55b displays the vertical rotation angle of the main body, and the display unit 55c displays the number of films. The analog display portion 55d extends in the horizontal direction to display the rotation angle of the main body 10 in the horizontal direction in an analog manner, and the analog display portion 55e extends in the vertical direction to display the rotation angle of the main body 10 in the vertical direction. These analog display parts 55d, 55e
Marks Ma and Mb of the light emitting diode are provided at the center position of the marks Ma and Mb as the rotation angle increases.
The inclination degree of the main body 10 can be seen at a glance by lighting the part away from b.

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 is the rotation of the fundus image captured by the image sensor 41 and the main body 10 each time the joystick switch 11 is pressed. A recording device for recording the angle, 63 is a solenoid for flipping up a quick return mirror, 64 is a keyboard for inputting various commands, 65 is a drive of the solenoid 63 based on the operation of a joystick switch or the keyboard 64,
It is a control device that controls the lighting of the halogen lamp 24 and the xenon lamp 26, the display of the display 55, and the like.

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

First, the camera body 10 is positioned at the positions shown in FIGS. 1 and 5, and the halogen lamp 24 is turned on so that the optical axis Eo of the eye E to be inspected and the optical axis 200a of the photographing optical system 200 coincide with each other. At this time, 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 optical axis Eo of the eye E to be inspected and the main body 10 is zero, and the display portions 55a and 55 of the display 55 are displayed.
“0” is displayed in b. Further, the central portions of the display portions 55d and 55e are turned on, and it is displayed that the rotation angle of the camera body 10, that is, the photographing angle is zero.

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, and the fundus image is captured by the film 35. After this, the quick return mirror 51 returns to the original position.

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 addition to the fundus image, the photographing angle “0” of the main body 10 is also recorded in the recording device 62.

Next, the main body 10 is rotationally moved to, for example, the position shown by the chain line in FIG. 5, and the optical axis 200a of the photographing optical system 200 is moved.
From the center of the fundus to the left. At this time, the encoder 5 generates a number of pulses corresponding to the rotational movement amount,
The control device 65 counts the number and obtains a photographing angle (angle formed by the optical axis Eo of the eye E to be inspected E and the main body 10) on the horizontal direction of the main body 10, and the angle is displayed on the display unit 55a of the display 55. Will be displayed. Here, to the right, for example, 3
When moved by 0 degrees, "+30" is displayed, and when moved by 30 degrees to the left, "-30" is displayed.

On the other hand, the lighting position of the display portion 55d is the main body 10
With the rotational movement of, the central position moves to the right, and the position corresponding to the rotation angle of 30 degrees of the main body 10 lights up.
The degree of the photographing angle of the main body 10 in the horizontal direction can be seen at a glance.

Similarly, when the main body 10 is moved in the vertical direction, the encoder 8 generates a number of pulses corresponding to the amount of rotation, and the controller 65 counts the number of pulses and the main body 1
The vertical shooting angle of 0 is calculated, and the shooting angle is displayed on the display unit 55b of the display 55. Also, since the lighting position of the display unit 55e moves vertically from the center position according to the rotational movement amount, the degree of the photographing angle of the main body 10 in the vertical direction can be seen at a glance.

The display portions 55a to 55e of the display 55 can be seen together with the fundus when viewed through the eyepiece lens 54 as shown in FIG. 3, so that the rotation angle can be known even when the body 10 is rotated while observing the fundus Er. Therefore, there is no need to take a look away from the fundus Er to check, and the usability is improved. Further, since the photographing angle is known, the photograph can be taken at the same angle as the photograph taken last time, and it becomes easy to observe the change over time.

Further, since the rotation angle of the main body 10 can be known by the scale, it is not necessary to rotate the main body 10 while looking through the eyepiece.

In the above embodiment, the photographing angle of the main body 10 displayed on the display portions 55a and 55b is not photographed on the film, but the display 55 and the imaging lens 5 are placed at the positions shown by the broken lines in FIG.
6. By disposing the mirror 57, the film 35 can be photographed and can be viewed through the eyepiece 54. In this case, the display 55 is in a conjugate position with the film 35 with respect to the imaging lens 56.

[0029]

According to the present invention, since the display means for displaying the angle formed by the main body and the optical axis of the eye to be inspected is provided, the angle of the main body with respect to the optical axis of the eye to be inspected can be known and the fundus can be seen again at the same angle. Can be photographed, and the change over time can be easily observed.

[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 view showing a fundus and a display device viewed through an eyepiece lens;

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

FIG. 5 is a plan view showing a rotation state of the main body in the horizontal direction.

[Explanation of symbols]

 4a Scale (display means) 5 Encoder (angle detection means) 6a Scale (display means) 8 Encoder (angle detection means) 10 Main body 55 Display (display means)

Claims (2)

[Claims] 1. A main body having a photographing optical system for photographing a fundus, 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 an optical axis of an eye to be examined. In the provided ophthalmologic apparatus, a display means for displaying an angle formed by the main body and the optical axis of the eye to be inspected is provided. 2. A main body having a photographing optical system for photographing the fundus, and 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, an ophthalmic apparatus comprising: an angle detection unit that detects an angle formed by the main body and the optical axis of the eye to be inspected; and a display unit that displays the angle detected by the angle detection unit. ..