JPH06114007A - Ophthalmologic camera - Google Patents

Abstract

PURPOSE:To facilitate the replacement of films in and loading thereof into a film chamber within a dark room. CONSTITUTION:A finder 4 and a film chamber 6 with a back lid 5 are arranged on the side of an inspector S of a camera body 3 and an illumination light source 7 near the finder 4. The inspector S observes an eyeground image of a subject P while the image is taken and recorded on a film of the film chamber 6 by flashing with a strobe inside the retinal camera body 3 timely. This series operation of observation and photographing is conducted in a virtual dark room or a dark room, where the perimeter of the film chamber 6 is lighted when the illumination light source 7 is turned ON. In the course of photographing on the film loaded with the back lid 5 closed, the illumination light source 7 is kept OFF or weak in emission. When the film chamber 6 is loaded with no film and the back lid 5 is opened or the photographing of possible several sheets is ended or the film is left unwound after the end of the photographing, the illumination light source 7 is kept ON or bright in emission.

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 capable of observing, measuring or photographing a side of a measuring portion of an eye to be examined in a dark room or a semi-dark room.

[0002]

2. Description of the Related Art Conventionally, an ophthalmologic apparatus such as a fundus camera performs inspection and operation of the apparatus in a semi-dark room or a dark room. Also, in such an environment, the film is exchanged or loaded into the film chamber of a 35 mm camera or an instant camera used for photographing and recording the fundus image of the patient.

Generally, in an ophthalmic examination such as fundus photography, it is performed in a semi-dark room so that unnecessary light rays do not enter the fundus camera and the examiner's eyes. For example, a fluorescent agent is injected into a blood vessel. In the case of performing fluorescence photography for photographing the fluorescent agent, it is necessary to brighten the dark room while performing the operation of injecting the fluorescent agent.

In such a case, it is necessary to perform a troublesome work such as turning on / off a desk lamp or a ceiling lamp in a dark room, which is conventionally prepared separately on the fundus camera side.

Further, for example, in a group medical examination in which such examinations are continuously performed, the subject may have to move with respect to the apparatus in a dark room, and a non-mydriasis type fundus camera. As described above, when it is necessary to dark-adapt the subject's eye in advance, it is difficult to move and sit the subject efficiently in particular.

[0006]

When the film is exchanged and loaded in the film chamber in the semi-dark chamber or the dark chamber as in the prior art, there are the following problems. (1) Each time the film is replaced or loaded, the interior light or nearby lighting equipment is turned on and off. (2) If there are many patients, the film may be replaced and loaded in a dark room, and it may be difficult to operate due to dark hands, which may result in failure. (3) It is difficult to confirm whether or not a film is loaded in the film chamber immediately before shooting. (4) The above-mentioned switch on / off is not only very troublesome, but it also causes the examiner and the assistant who injects the fluorescent agent to use extra nerves. In addition, when carrying out the movement of the subject, the subject not only do not know may be walking aimed at anywhere because there is no its target, the position of the chair, which is a danger not able to confirm the location of the device There is a problem.

It is an object of the present invention to provide an ophthalmologic photographing apparatus which can easily exchange and load a film in a film chamber in a dark room.

[0008]

A first ophthalmic photographing apparatus according to the present invention for achieving the above object is a recording means for recording an eye to be examined in an ophthalmic observation photographing apparatus for observing and photographing an eye to be examined. An illumination light source is installed in the vicinity of, and the brightness of the illumination light source is changed according to the state of the recording means.

Further, the second ophthalmologic photographing apparatus has a face fixing portion for fixing the face of the subject, a main body portion for measuring or photographing a predetermined part of the subject's eye, and an operation portion for measuring or photographing. In an ophthalmologic apparatus including: an illumination unit that illuminates the periphery of the subject of the face fixing unit; a detection unit that detects the presence of the face of the subject on the face fixing unit; The control means is turned on when the person's face is not present, and is turned off or dimmed according to a predetermined operation or operation of the operation unit by the examiner.

[0010]

In the first ophthalmologic photographing apparatus having the above-mentioned structure, the illumination light of the illumination light source is extinguished or weakly turned on in the state where a normal film is loaded and photographing is performed, but there is no film. In the state of the film room, such as when the film is completely shot or when the back cover is open, the illumination light is turned on brightly to illuminate the film room.

In the second ophthalmologic imaging apparatus having the above-mentioned configuration, the subject can be safely and quickly seated on the apparatus by providing the lighting means in the face fixing portion for fixing the face of the subject. Not only that, the illumination is turned on when the subject's face is not present, and the illumination is turned off in accordance with the operation of the examiner performing a measurement or an image to darken the surroundings.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiments. 1 and 2 are block diagrams showing the case where the present invention is applied to a fundus camera. A slide base 2 is slidably mounted on a base 1, and a fundus camera body 3 is installed above the slide base 2. A film chamber 6 with a finder 4 and a back cover 5 is provided on the examiner S side of the camera body 3. An illumination light source 7 including an LED or a lamp is provided near the finder 4.

FIG. 3 is a front view of the fundus camera main body 3 as seen from the examiner's side, and FIG. 4 shows a state in which the back cover 5 of the film chamber 3 is opened in this front view. Loading is performed by opening and closing the back cover 5.

The examiner S views the fundus image of the subject P by the finder 4
Through the retinal camera main body 3 and the strobe light (not shown) inside the retinal camera main body 3 is emitted at a time of 35 m in the film chamber 6.
Shoot and record on m film. This series of observation / photographing operations is normally performed in a semi-dark room or a dark room.
When is turned on, the periphery of the film chamber 6 is illuminated.

FIG. 5 shows a block circuit configuration diagram. An MPU (microprocessor unit) 11 is built in the fundus camera body 3, and the output of the MPU 11 is connected to the illumination light source 7 via the illumination light source emission drive section 12. Has been done.
Further, the film chamber 6 is provided with an MPU 13
The output of 3 is connected to the MPU 11.

The MPU 13 determines the state of the film chamber 6, that is, whether the film is loaded, the number of shootable images has ended, or whether the film has rewound after the shooting or the case back 5 is open. Information to MPU
Send to 11. Upon receiving this information, the MPU 11 changes the brightness of the illumination light source 7 via the illumination light source emission drive unit 12.

During the shooting operation, that is, when the film is loaded, the back cover 5 is closed and the film is in the middle of shooting, the illumination light source 7 is turned off or weakly emitted.
When the illumination light source 7 is constantly brightened, when the examiner S observes the fundus image of the subject's eye E of the subject P with the finder 4, it can enter the eye of the subject S as light from the outside. It is difficult to observe, and may affect the diagnosis. Therefore, it is desirable that the illumination light source 7 is turned off or weakly emitted.

Next, when the film is not loaded in the film chamber 6, the case back 5 is open, or when the number of images that can be photographed is completed or when the film is rewound after completion, the illumination light source 7 is used. Illuminate or emit a bright light. Since the illumination light source 7 is installed near the film chamber 6, it illuminates the film chamber 6. As a result, even in a semi-dark room or a dark room, the film can be easily exchanged / loaded and the operability is improved. Further, by changing the brightness of the illumination light source 7, it is possible to easily confirm the state of the film in the film chamber 6, that is, the presence or absence of the film and the completion of photographing.

In the embodiment, the example of the 35 mm film chamber has been described, but the same applies to the instant film chamber. The illumination light source 7 may be a data displayable one such as an LDE array, and the change in brightness can be independently controlled by an external switch.

FIG. 6 shows a mydriasis type fundus camera according to another embodiment, in which a fundus camera body 13 including an optical system for illuminating and photographing the fundus of the eye to be inspected is provided on a base 11 via a slide base 12. And a pair of left and right poles 14 are provided on the base 11,
A face receiving portion 15 for fixing the face of the subject P between them
Is provided. A finder 16 for observing the fundus of the eye to be inspected is provided on the examiner S side of the fundus camera body 13, and the examiner S aligns the device by looking into the fundus to observe and photograph the fundus. It has become.

The finder 16 is provided with an infrared proximity sensor 17 for detecting that the face of the examiner S is approaching, while the chin rest 18 is also provided with a similar proximity sensor 19. The lighting of the illumination lamp 20 provided above the pair of left and right poles 14 is controlled using the outputs of the two sensors 17 and 19. The illumination lamp 20 is directed downward so as to illuminate the periphery of the face receiving portion 15, the periphery of the subject, and the feet.

FIG. 7 shows an example of a lighting control circuit. The proximity sensor 19 provided in the chin rest 18 outputs a low level when the subject S has a face. This output is delayed by the timer 22 via the buffer circuit 21 and then connected to one input terminal of the OR circuit 23.
The timer 22 has a function of outputting its output when a constant input continues for a predetermined time, absorbs a subjective operation of the subject, and is used for stabilizing lighting control of the illumination lamp 20.

On the other hand, the output of the proximity sensor 17 is at a low level when the examiner S has a face, and this output is also connected to the other input terminal of the OR circuit 23 via the buffer circuit 24 and the latch circuit 25. There is. When the input of the latch circuit 25 becomes low level, the input of the reset terminal R is kept at the low level, and the latch circuit 25 holds the state. The output of the OR circuit 23 is connected to the reset terminal R.
The output of the OR circuit 23 is input to the lamp lighting circuit 26,
When the output becomes high level, the illumination lamp 20 is turned on, and at low level the illumination lamp 20 is turned off.

In the present control circuit having the above structure, neither the examiner S nor the examinee P is involved in the apparatus, that is, the examinee P does not fix his / her face to the face receiving portion 15, When the person S also does not look into the finder 16, the inputs of both the timer 22 and the latch circuit 25 to the OR circuit 23 become high level, and the illumination lamp 20 is turned on. After that, the subject P fixes his / her face on the face receiving portion 15 for the examination, that is, after one input to the OR circuit 23 becomes low level,
When the examiner S looks into the finder 16 once, both the inputs to the OR circuit 23 become low level, and the illumination lamp 20 is turned off.

In this state, even if the examiner S removes his face from the finder 16 for operating the apparatus, the illumination circuit 20 is kept turned off by the action of the latch circuit 25. After that, when the examination is completed and the subject P separates his / her face from the face receiving portion 15, one of the inputs to the OR circuit 23 becomes high level, so that the illumination lamp 20 is turned on again. At the same time, the latch circuit 25 is reset and returns to the initial state.

Although the basic operation of the apparatus has been described using the control circuit of FIG. 7, various other application examples of the method for controlling the lighting of the illumination lamp 20 are possible. Two examples will be described below. The control circuit shown in FIG. 8 achieves the two examples at the same time. One is to perform lighting control of the illumination lamp 20 to a higher degree by using a brightness sensor 31 that detects ambient brightness. By inputting the output of the OR circuit 23 of FIG. 7 to one of the AND circuits 32 and connecting the output of the brightness sensor 31 to the other one, the illumination lamp 20 is turned on when the ambient brightness is sufficient. It is possible to control the absence.

That is, the brightness sensor 31 is configured to output a low level when the surroundings are bright and a high level when the surroundings are dark, so that the lamp lighting circuit 26 outputs a high level signal only when the surroundings are dark. Is entered.

Another embodiment relates to an input unit for a predetermined operation by the examiner, and performs an optimum lamp lighting control operation when performing fluorescence imaging. As aforementioned,
When performing fluorescence imaging, a fluorescent agent is injected into the vein of the subject. This injection operation must be performed under illumination as a matter of course, but the examiner usually starts the alignment with the subject's eye from the previous stage. Therefore, it must be performed at a time different from the timing of turning off the illumination lamp 20.

In FIG. 8, in order to obtain the timing, a detector 33 for detecting an operation to a barrier filter used for fluorescence photographing and a mode changeover switch 34 for performing fluorescence photographing.
Is using the output of. The detector 33 may be either a barrier filter insertion switch or a switch that is turned on / off by insertion. However, the detector 33 outputs a high level when the barrier filter is in the optical path. A high level shall be output in the mode to perform. The outputs of both are summed and inverted by the OR circuit 35, and the sum with the output of the proximity sensor 17 is added to the OR circuit 3.
The above timing is generated by inputting to the latch circuit 25 via 6.

That is, in the fluorescence mode, the condition for turning off the lamp is that the subject P's face is fixed, and the examiner S inserts a barrier filter into the optical path, and the finder 16
From the time when observation is started. The barrier filter is a filter that transmits only the fluorescent component emitted from the fluorescent agent from the fundus, and the blood flow on the fundus is observed by observing through it. If the examiner S does the above, the above-mentioned purpose after the injection of the fluorescent agent is achieved. At this time, since the illumination lamp 20 is prepared above the face receiving portion 15 and has directivity downward, it is optimal for illuminating the arm of the subject P who injects the fluorescent agent.

The output of the mode changeover switch 34 is
At the same time, it is connected to the OR circuit 23 via a detection circuit 37 which detects rising and falling and generates a pulse. This is because the examiner can see the finder 16 when the mode is switched.
The function is to turn on the illumination lamp 20 when the user is not looking in, and the control of the illumination lamp 20 is reset by mode switching.

This second embodiment shows an example applied to a fundus camera, but in order to apply to an ophthalmologic apparatus such as a viewfinder of an autorefractometer, which does not have an observation means approaching the examiner, the examination is performed. The same control can be performed by detecting the operation that can be regarded as the preparation completion or the start. For example, it could be a touch sensor on the control stick to align the device,
It may be a position sensor of the main body that is moved by the operation rod.

[0033]

As described above, in the first ophthalmologic photographing apparatus according to the present invention, the illumination light source is installed near the film chamber,
By changing the brightness depending on the condition of the film chamber, it becomes easy to exchange and load the film even in a dark room, and at the same time, the presence or absence of the film can be easily confirmed.

Further, the second ophthalmologic photographing apparatus is provided with the illuminating means having directivity above the face receiving portion for fixing the face, and further controls the lighting thereof in association with the presence or absence of the examinee and the operation of the examiner. This allows the subject to be informed of the position of the face-fixing part, not only allows the subject to move safely in the dark room, but also determines the type of face-receiving part, so that the face of the subject can be reliably detected. Can be placed in place. Also,
Since the illumination light of the illumination means is not directly illuminated to the subject's eye, the subject does not feel uncomfortable. Furthermore, the examiner can concentrate on the inspection without being bothered by the operation of turning on and off the lamp, and particularly during the fluorescence imaging, the inspection can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a partially enlarged side view.

FIG. 3 is a front view of a finder section.

FIG. 4 is a front view of a finder section.

FIG. 5 is a block circuit configuration diagram.

FIG. 6 is an external view of a fundus camera.

FIG. 7 is a configuration diagram of a control circuit.

FIG. 8 is a configuration diagram of another embodiment of the control circuit.

[Explanation of symbols]

 3, 13 Fundus camera body 4, 16 Finder 5 Back cover 6 Film chamber 7 Illumination light source 10, 11 MPU 17, 19 Proximity sensor 20 Illumination lamp 31 Brightness sensor 34 Mode selection switch

Claims (7)

[Claims] 1. An ophthalmologic observation and photographing apparatus for observing and photographing an eye to be inspected, wherein an illumination light source is installed near a recording means for recording the eye to be inspected, and the brightness of the illumination light source is changed depending on the state of the recording means. An ophthalmologic imaging device characterized in that 2. An ophthalmologic apparatus comprising a face fixing part for fixing the face of a subject, a main body part for measuring or photographing a predetermined part of the eye to be examined, and an operation part for measuring or photographing. Illuminating means for illuminating the periphery of the subject in the face fixing part, detecting means for detecting the presence of the face of the subject in the face fixing part, and lighting the illuminating means when the face of the subject does not exist However, the ophthalmologic imaging apparatus further comprises a control unit that turns off or dims the light according to a predetermined operation or operation of the operation unit by the examiner. 3. The operation section has an observation means for observing a predetermined part of the eye to be inspected, and a detection means for detecting the approach of the examiner's face to the observation means, based on the output of the detection means. The ophthalmologic imaging apparatus according to claim 2, wherein the control unit is activated. 4. The operation section has an alignment operation member for aligning the apparatus with an eye to be inspected, and a detecting means for detecting the operation member by an examiner, and operates the control means based on an output of the detecting means. The ophthalmic photographing apparatus according to claim 2, wherein 5. The operation section includes a filter operation member for performing fluorescence imaging or measurement of an eye to be inspected, and second detection means for detecting an operation on the operation member. The ophthalmologic imaging apparatus according to claim 2, wherein the control means is operated based on an output. 6. The ophthalmologic imaging apparatus according to claim 2, further comprising a brightness sensor that detects the brightness of the surroundings, and the control means turns off the lighting means when the surroundings are bright by the sensor. . 7. An ophthalmologic apparatus having a face fixing part for fixing a face of a subject and a main body part for measuring or photographing a predetermined part of an eye to be inspected, wherein the orientation is downward on the upper part of the face fixing part. An ophthalmologic imaging apparatus comprising an illuminating means for illuminating the surroundings of a subject who is made.