JP3012006B2 - Ophthalmic imaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic photographing apparatus for observing and photographing a subject's eye.

[0002]

2. Description of the Related Art Conventionally, an ophthalmologic photographing apparatus for observing and photographing an eye to be examined is known. The ophthalmologic imaging apparatus includes a display unit that displays the observation state or the imaging state to notify an examiner operating the ophthalmologic imaging apparatus whether the ophthalmologic imaging apparatus is in the observation state or the imaging state. .

In such an ophthalmologic photographing apparatus, for example, a fundus camera, the subject must endure the stimulation of illumination light in order to irradiate the subject with strong light to perform positioning and focusing. However, if the imaging is performed for a long time, the burden on the subject becomes considerable. Therefore, the examiner seeks cooperation with the subject after explaining the purpose of the imaging in order to obtain good imaging results.

In the case of recording a still image on a film or the like, if the image is taken quickly when the alignment and focusing are completed, it is possible to complete the photographing before the eye to be examined moves due to the stimulation of the photographing light. Because it was possible, it had little effect on the shooting results.

On the other hand, with the recent development of moving picture recording devices,
In the ophthalmologic imaging apparatus, a method of continuously recording the information of the eye to be inspected by a moving image is widely used. Because it is good, the burden is continuously imposed on the subject. In such a state, the subject
Perform eye fixation or open eyelids according to the examiner's instructions.

[0006]

However, if the examinee does not fixate or open his eyelids without proper instructions from the examiner, he may endure for unnecessary time, or There is a problem that the eyelids are closed by misunderstanding despite the fact that the patient can endure the recording during the recording, not only putting an unnecessary burden on the subject but also failing to obtain a good imaging result.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a good imaging result without imposing an unnecessary burden on the subject when recording and recording moving images of the subject's eye. An object of the present invention is to provide an ophthalmologic photographing apparatus capable of obtaining the following.

[0008]

In order to achieve the above object, an ophthalmologic photographing apparatus according to the first aspect of the present invention comprises a subject
Guide the eye to be examined when observing and photographing the optometry
While providing a fixation target for the subject in an imaging state.
An ophthalmological imaging device equipped with a means of notifying that there is
And the notifying means is provided for the brightness, color or blinking of the fixation target.
Note that at least one of the cycles is changed.
Sign.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an ophthalmologic photographing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of a fundus camera as an ophthalmologic photographing apparatus, in which 10 is a fundus camera, 11 is a main body of the fundus camera 10, 12 is a movable table movable in a horizontal plane, 1
Reference numeral 3 denotes an operation unit for operating the movable base 12, 14 denotes a photographing switch, 15 denotes a fixed base, 16 denotes a relay lens, and 17 denotes T
V camera, 18 is 35mm camera, 19 is forehead, 20
Is a chin rest, and 21 is a fixation target for guiding the eye to be examined. At the tip of the fixation target 21, an LED 22 that can blink is mounted. The subject can easily fixate the fixation target 21 by the blinking of the LED 22. In addition, receiving a signal from the photographing switch 14,
A CPU 23 as a control unit for controlling the CPU 22 is built in, for example, the main body 11. From the CPU 23, as shown in FIG.
A control signal for changing the blinking cycle of D22 is sent to LED22. The LED 22 and the CPU 23 function as notification means.

By operating the photographing switch 14, selection of a TV camera 17 or a 35mm camera 18 and selection of recording of a still image or recording of a moving image with the TV camera 17 can be performed via a photographing mode changeover switch (not shown). it can. When the photographing switch 14 is operated to select moving image recording of the TV camera 17, while the photographing switch 14 is pressed, the reflection image of the fundus oculi received by the TV camera 17 is a VTR.
Recorded by a device (not shown). Shooting switch 14
Are also sent to the CPU 23 that controls the fixation target 21 at the same time. It should be noted that the VTR device may be independently provided with a sending means for sending a recording start signal or a recording stop signal, and the sending means may control the VTR device. Also,
The photographing switch 14 may be a push / push switch that switches between ON and OFF each time the photographing switch 14 is pressed.

For this reason, when the examiner presses the photographing switch 14 to change from the observation state to the photographing state (moving picture recording state), the subject changes the blinking cycle of the fixation target 21 via the LED 22, so that the subject is in the observation state. It is possible to know that the state has shifted to the photographing state from, and to intentionally maintain the fixation of the eye to be examined or the state in which the eyelids are opened.

It is to be noted that the fixation target 21 in the observation state is a normal light, and the fixation target 21 is turned off when the photographing switch 14 is pressed to change the observation state to the photographing state. You may be notified that it has shifted to the shooting state.

The luminance of the fixation target 21 may be increased or decreased so that the degree of change can be determined, so that the subject can be notified that the observation state has shifted to the photographing state. In this case, a switching means for switching the light amount between the photographing and the observation may be provided independently, and the light amount may be switched manually or in conjunction with the increase or decrease of the luminance. This light amount switching may be automatically performed by taking in and out a neutral density (ND) filter.

Further, a light source independent of the fixation target 21 may be provided, and the subject may be notified by a change in the blinking cycle of the light source, a change in the luminance, or turning on / off.

Further, the photographing state may be recognized by changing the color of the fixation target 21 using, for example, an LED whose color is changed by a voltage change.
The main body 11 is provided with a buzzer 24 for receiving a control signal from the CPU 23 and generating a warning sound.
May be used to notify the subject that the observation state has shifted to the imaging state.

A similar effect can be obtained by applying a vibration during photographing to one or both of the forehead rest 19 and the chin rest 20 by a control signal from the CPU 23.

[0018]

According to the ophthalmologic photographing apparatus according to the present invention, the subject
Guides the subject's eye when observing and photographing the subject's eye
To provide a fixation target for
Ophthalmologic imaging equipment with a means of notifying that
Wherein the notifying means is the luminance, color or
At least one of the blinking cycles is changed
By making the subject aware that the subject is in the recording state of photography and enabling active photography cooperation, the subject
To keep the eye fixation or eyelids open
Thus, even in the case of moving image shooting recording, it is possible to record an image in a good fixation state of the subject's eye or a state in which the eyelids are opened.

[Brief description of the drawings]

FIG. 1 is a perspective view of an ophthalmologic photographing apparatus according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a notification unit.

[Explanation of symbols]

 10 ophthalmic imaging device 22 LED 23 CPU

Claims (1)

(57) [Claims] 1. When observing and photographing a subject's eye.
And a fixation target for guiding the eye to be examined.
Notification that the subject is in the imaging state
An ophthalmologic photographing apparatus comprising:
At least one of the brightness, color or blinking cycle of the fixation target
An ophthalmologic photographing apparatus characterized by being changed.