JP2582301Y2 - Slit lamp microscope - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slit lamp microscope for illuminating a subject's eye with slit light for observation and photographing in ophthalmic medical treatment.

[0002]

2. Description of the Related Art A slit lamp microscope is a type of microscope used by medical personnel such as ophthalmologists to observe an eye to be examined with slit light. The observation image photographing by the slit lamp microscope is performed by mounting a photographing device in the middle of the observation optical path and guiding a part or all of the observation light to the imaging surface by the optical path changing member. As the optical path changing member, a beam splitter, a half mirror or a reflection mirror is used. There are various types of photographing devices, and one or two photographing devices are mounted as required by the photographer.

A conventional example in which one photographing device is mounted on a slit lamp microscope will be described with reference to FIG. 7, reference numeral 1 denotes a slit lamp unit, 2 denotes a variable power objective microscope unit, 3 denotes a photographing device unit, 4 denotes a binocular eyepiece microscope unit, 5 denotes an eyepiece unit, and 7 denotes an eye to be examined. A beam splitter (or a half mirror) 3b is used as an optical path changing member in the photographing apparatus 3, and the member is manually moved into and out of the observation optical path.

The illumination light source lamp 1 in the slit lamp unit 1
The illumination light emitted from 1 is a condenser lens group 1b
, The width of which is adjusted by the slit width adjusting mechanism 12, and then the light is vertically deflected by the reflecting mirror 1d. The vertically polarized illumination light is applied to the eye 7 to be inspected. The reflected light from the eye to be examined passes through the objective lens 2b and the variable power lens group 2c of the variable power objective microscope unit 2 as observation light. Objective lens 2
b, Observation light that has passed through the variable power lens group 2c is split and deflected by the beam splitter 3b of the photographing unit 3. The observation light deflected by the beam splitter 3b passes through the relay lens 3c as a light beam for imaging, is deflected again by the reflection prism 3d, and is guided to the photographic film 3e. On the other hand, the observation light passing through the beam splitter 3b is reflected by the reflection prisms 4b, 4c of the binocular ocular microscope unit 4.
Through the lens 5b of the eyepiece 5,
It reaches the observation imaging plane 5c.

When a beam splitter or a half mirror is used as the optical path changing member, a part of the observation light is deflected in the direction of the photographing device while the optical path changing member is inserted in the observation light path, and the remaining light is deflected. Since the observation light is used as it is as it is, it can be observed with a part of the observation light even during photographing.

An example of a conventional device using an electrically controlled reflection mirror as an optical path changing member will be described with reference to FIG. In FIG. 8, reference numeral 6 denotes a photographing device. The reflection mirror 6b can be moved in and out by electrical control.
Release button 4 installed on joystick 41
It is performed in conjunction with 2. When the release button 42 is turned on, the reflection mirror 6b is automatically inserted into the observation optical path 6a immediately before a shutter (not shown) of the photographing device is opened, and guides observation light into the photographing device. After the shutter is closed, the reflecting mirror 6b is automatically disengaged from the observation optical path 6a, and the observation light returns to the observation imaging plane 5c.

According to this device, the release button is turned on.
Then, the reflecting mirror is automatically moved in and out of the observation optical path by electrical control. This eliminates the complexity of the shooting operation.

Next, a conventional example in which two photographing devices are mounted on a slit lamp microscope will be described with reference to FIGS. 9 and 10. FIG. 9 and 10, 1 is a slit lamp section, 2 is a variable power objective microscope section, 3 is a 35 mm photographing apparatus section, 4 is a binocular microscope section, 5 is an eyepiece section, 6
Denotes an instant photographing device, and 7 denotes an eye to be examined. 35
The mm photographic device unit 3 and the instant photographic device unit 6 use a beam splitter or a half mirror as an optical path conversion member, and are manually inserted into and removed from the observation optical path.

Referring to FIG. 9, a procedure for taking a 35 mm photograph will be described. First, the beam splitter (or half mirror) 3b of the 35 mm photographic device 3 is manually inserted into the observation optical path 2a, and the beam splitter (or half mirror) 6b of the instant photographic device 6 is connected to the observation optical path 2a.
Remove from a. Observation light that has passed through the variable magnification objective microscope 2 is split and deflected by the beam splitter 3b of the 35 mm photographing device 3. The observation light deflected by the beam splitter 3b is guided to the photographic film 3e. On the other hand, the observation light passing through 3b is
reaches c.

Referring to FIG. 10, a procedure for taking an instant photograph will be described. First, the beam splitter 6b of the instant photographing device 6 is manually inserted into the observation optical path 2a, and the beam splitter 3b of the 35mm photographing device 3 is inserted.
Is removed from the observation optical path 2a. The observation light that has passed through the variable-magnification objective microscope unit 2 is split and deflected in light amount by the beam splitter 6b of the instant photographing unit 6. The observation light deflected by the beam splitter 6b is guided to the photographic film 6d. On the other hand, the observation light that has passed through the beam splitter 6b reaches the observation imaging plane 5c.

The position detection switches 31 and 61 detect whether the beam splitters 3b and 6b are present in the observation optical path, respectively. Position detection switches 31, 61
Is linked with a release button 42 provided on the joystick 41. The release button 42 operates commonly in the 35 mm photographing device 3 and the instant photographing device 6. Therefore, when the beam splitter or the half mirror 3b of the 35mm photographing device 3 is located on the optical axis 2a, the shutter of the 35mm photographing device 3 is operated by turning on the release button 42,
35mm photos can be taken. Also, the beam splitter or half mirror 6b of the instant photographing device 6
Is located on the optical axis 2a, the release button 4
2 to turn on the instant photographing device 6
The shutter is activated and you can take instant photos.

According to this apparatus, when a beam splitter or a half mirror is used as the optical path changing member of the two photographing apparatuses, a part of the observation light is transmitted while the optical path changing member is inserted into the observation optical path. Since the light is deflected in the direction of the photographing device and the remaining observation light is used as it is as observation light, it is possible to observe with a part of the observation light even during photographing.

[0013]

However, in the above-mentioned conventional technology, there is a demand to use a plurality of photographing devices for each purpose of examination and research, but in reality, when a plurality of photographing devices are mounted, There is a disadvantage that the shooting operation is complicated. When multiple photographing devices were worn at the same time, the photographer had to reach for each photographing, identify the beam splitter or half mirror for each photographing device, and put it in and out, which was very annoying and agile. . Since the observer is troublesome in instructing the patient and fixing the affected part in addition to the photographing operation, it is burdensome to perform many operations for properly using the photographing device.

In the prior art, when a plurality of photographing devices are mounted, a beam splitter or a half mirror is used for an optical path changing member, so that reflected light from an eye to be examined is split by a beam splitter or the like. As a result, the amount of photographing light is insufficient, and depending on the state of photographing, such as photographing microstructures of the eye, the amount of photographing light may be insufficient. In addition, when the optical path conversion member is inserted into the observation optical path, the amount of observation light is insufficient for performing fine observation, so that after the photographing, the optical path conversion member must be removed from the observation optical path again for the next observation. Did not. Therefore, in this conventional apparatus, it is necessary to manually move the beam splitter or the half mirror into and out of the observation optical path every time photographing is performed, which is very complicated.

Further, when a plurality of photographing devices are mounted, even if a beam splitter or a half mirror of a photographing device different from the photographing device desired to be photographed is inserted, photographing is performed by a different photographing device by pressing the release button. As a result, it was sometimes noticed after development that the intended photographing was not performed.

The problem to be solved by the present invention is that even when a plurality of photographing devices are mounted, the photographing device can be selected simply and reliably by operating one of the changeover switches, and the photographing device is used for photographing at the time of photographing. An object of the present invention is to provide a slit lamp microscope capable of performing photographing without reducing the amount of light flux.

[0017]

According to a first aspect of the present invention, there is provided a slit lamp optical system for illuminating an eye to be inspected with slit light, and the illuminated eye to be inspected. A split lamp microscope comprising: an observation optical system for observing the image; and one or more detachable photographing devices having a deflecting unit for deflecting a light beam of the observation optical system into a photographing light beam. In the above, when two or more photographing devices are mounted, one photographing device is selected,
There is provided a slit lamp microscope having selection instruction means for giving an instruction to operate the deflecting means of the selected photographing apparatus .

The deflecting means can be constituted, for example, by including a reflecting mirror for reflecting the light beam of the observation optical system, and a driving means for driving the reflection mirror to move in and out of the observation optical path. The selection instructing unit includes an instruction receiving unit that externally receives an instruction as to which one of the photographing apparatuses is to be selected, and an operation permission that outputs an operation permission signal that permits an operation to the driving unit of the selected photographing apparatus And a part. In addition, the photographing device
A release device for transmitting a release signal;
Signal and the release signal, the driving means and the
A photographing control means for controlling a shutter of the photographing device;
Can also be provided. When two photographing devices are mounted, for example, the control unit of one photographing device is set to be in a photographable state when the operation permission signal is at a high level, and The control means of the photographing apparatus is set so as to be in a photographing permission state when the operation permission signal is at a low level, and the operation permission unit outputs the permission signal in response to an instruction from the instruction reception unit. A configuration having a function of inverting levels can be provided.

[0019]

According to the present invention, when two or more photographing devices are mounted on a slit lamp microscope, one photographing device is used.
And the deflecting hand of the selected photographing device
There is a selection instructing means for giving an instruction to operate the step. Each package
The deflecting means is constituted by a reflecting mirror and a driving means for driving the reflecting mirror to move in and out. Further, on condition that the operation permission signal output by the selection instructing means is input, a photographing control means for sending a release signal to the driving means and driving the reflection mirror to move into and out of the observation optical path is provided for each photographing apparatus. Therefore, the reflection mirror of the selected photographing device is inserted into the observation optical path in conjunction with the release button. The reflecting mirror guides all observation light to the photographing device, and the photographing light flux is not dimmed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are optical path diagrams of the slit lamp microscope of the present invention, FIG. 3 is a front view and a perspective view of a component arrangement view of a photographing device, and FIGS. The circuit diagrams of the control means are respectively shown.

1 and 2, reference numeral 1 denotes a slit lamp unit, 2 denotes a variable power microscope unit, 4 denotes a binocular microscope unit, 5 denotes an eyepiece unit, 7 denotes an eye to be examined, 8 denotes a 35 mm photographing device, and 20 denotes an instant. The photographing device 40 is a slide table.

The variable magnification microscope section 2, the binocular microscope section 4, and the eyepiece section 5 constitute an observation optical system. The slit lamp optical system 1 and the observation optical system are supported on a slide table 40, respectively.
mm photography device 8 and instant photography device 20
Is arranged. The 35 mm photographing device 8 and the instant photographing device 20 include a reflecting mirror 8 as a deflecting member.
b and 20b, respectively, for selecting and instructing a photographing device.
The changeover switch 30 is connected to the instant photographing device 2
0 is located on the photographer side of the lens barrel. A release button 42 for outputting a release signal is provided on the joystick 41, and the joystick 41 is disposed on the slide table 40 on the observer side.

The structure of the photographing apparatus will be described with reference to FIG. 3 taking a 35 mm photographing apparatus 8 as an example. As shown in FIG. 3A, the reflection mirror 8b is installed only in the optical path on the right eye side of the observer, and is driven by the driving unit 81 to appear and disappear on the observation optical path 2a. The observation light deflected by the reflection mirror 8b is guided to the photographic film 8e as a light beam for imaging on the photographic optical path 8a. On the electric circuit board 82, an operation permitting circuit 8e for outputting an operation permitting signal to the photographing device selected by the changeover switch, a driving unit 81 of the reflection mirror receiving the operation permitting signal and the release signal, and a shutter (not shown) )
And a photographing control means for transmitting an operation signal to the camera.
The internal structure of the instant photographing apparatus 20 is the same.

FIG. 4 shows an embodiment of connection of electric wiring when the 35 mm photographic device 8 and the instant photographic device 20 are simultaneously mounted on the slit lamp microscope main body 11. The slit lamp microscope main body 11 is provided with a connector 8f1 of the 35 mm photographing device unit 8,
A connector 11a1, which can be connected to 8f2 as well as to the connectors 20f1 and 20f2 of the instant photographing device 20;
11a2. The 35 mm photographing device section 8 is connected to the main body 11 via connectors 8f1, 8f2 and 11a1, 11a2. In addition, the instant photographing device unit 20 includes the connectors 20f1, 20f2, 8g1, and 8g.
It is connected to the 35 mm photographing device unit 8 via g2.

The release signals output from the release button 42 are connected to the connectors 11a1 and 8f1, 8g1 and 20f
1 through the slit lamp microscope body 1
1, 35 mm photographing device unit 8 and instant photographing device unit 20. The operation permitting circuits 8e and 20e for outputting an operation permitting signal to the photographing device selected by the changeover switch are passed to the 35mm photographing device unit 8 and the instant photographing device unit 20 via the connectors 8g2 and 20f2 to permit the operation. A circuit 50 is formed. When receiving both the release signal and the high level from the end (A) of the operation permitting circuit 50, the photographing control circuit 8m of the 35mm photographing device 8 receives the shutter and the reflection mirror 8b of the 35mm photographing device 8. For example, an AND circuit is configured to output an operation signal. When receiving both the release signal and the low level from the end (B) of the operation permitting circuit 50, the photographing control circuit 20m of the instant photographing device 20 receives the shutter and the reflection mirror 8b of the instant photographing device 20. For example, an AND circuit is configured to output an operation signal.

The wiring 8h in the 35mm photographing unit 8 includes:
High level voltage is applied. A low-level voltage is applied to the wiring 20h in the instant photographing device unit 20. Set the changeover switch 30 installed in the instant photographing device 20 to “INSTANT”.
When set to the side, the operation permission circuit 50 is connected to the wiring 20h and becomes low level, and the end (A) of the operation permission circuit 50
(B) Both become low level, and the instant photographing device 20 operates. When the changeover switch 30 is set to the "35 mm" side, the operation permission circuit 50 is disconnected from the wiring 20h and connected to the high-level voltage of the wiring 8h via the pull-up resistor 8k.
Since both ends (A) and (B) of 0 become high level, the 35 mm photographing device section 8 operates.

Referring to FIG. 1, the procedure for taking a 35 mm photograph will be described. First, set the changeover switch 30 to “35m
When set to the "m" side, the operation permission circuit 50 outputs a high level at which the 35 mm photographing device 8 operates. Next, the release button 42 set on the joystick 41
Is turned on, the photographing control circuit 8m receives both the release signal and the operation permission signal, and outputs a driving signal and a release signal to the reflection mirror driving unit 81 and the shutter of the 35 mm photographing device 8, respectively. The drive unit 81 of the reflection mirror of the 35 mm photographing device 8 receives the drive signal and sets the reflection mirror 8b on the optical axis 2a. The illumination light emitted from the illumination light source lamp 11 passes through the condenser lens group 1b, and the width of the illumination light is adjusted by the slit width adjustment mechanism 12.
It is deflected vertically by d. The vertically polarized illumination light is applied to the eye 7 to be inspected. The reflected light from the eye to be examined passes through the objective lens 2b and the variable power lens group 2c of the variable power objective microscope unit 2 as observation light. The observation light passing through the objective lens 2b and the variable power lens group 2c turns on the release button 42
As a result, the drive signal is received from the photographing control signal, and the light is deflected vertically downward by the reflection mirror 8b provided on the optical axis. The observation light deflected vertically downward by the reflection mirror 8b passes through the relay lens 8c as a light beam for imaging, is deflected again by the reflection prism 8d, passes through the shutter, and reaches the photographic film 8d. After the photographing, the reflecting mirror 8b separates from the optical axis 2a, and the objective lens 2b,
The observation light that has passed through the variable power lens group 2c is deflected by the reflection prisms 4b and 4c of the binocular eyepiece microscope unit 4, passes through the lens 5b of the eyepiece lens unit 5, and reaches the observation imaging plane 5c.

Next, referring to FIG. 2, a procedure for taking an instant photograph will be described. First, the changeover switch 30 is set to the “INSTANT” side. Next, a release button 42 provided on the joystick 41 is turned on. As described above, the photographing control circuit 20m of the instant photographing device 20 outputs a driving signal and a release signal to the reflection mirror driving unit and the shutter of the instant photographing device 20, respectively. The reflection mirror driving unit receives the driving signal from the photographing control signal and sets the reflection mirror on the optical axis 2a. The illumination light emitted from the illumination light source lamp 11 passes through the condenser lens group 1b, and after the width is adjusted by the slit width adjustment mechanism 12,
The light is vertically deflected by the reflecting mirror 1d. The vertically polarized illumination light is applied to the eye 7 to be inspected. The reflected light from the eye to be examined is used as the observation light as the objective lens 2 of the variable magnification objective microscope unit 2.
b, through the variable power lens group 2c. The observation light that has passed through the objective lens 2b and the variable power lens group 2c is
When 2 is turned on, a drive signal is received from a photographing control signal, and the light is deflected vertically upward by a reflection mirror 20b provided on the optical axis. The observation light deflected vertically upward by the reflection mirror 20b passes through the relay lens 20c and the shutter as a light beam for imaging, and
e. After the photographing, the reflection mirror 20b is moved to the optical axis 2
a, the observation light having passed through the objective lens 2b and the variable power lens group 2c is reflected by the reflection prism 4 of the binocular eyepiece microscope unit 4.
b, the lens 5b of the eyepiece 5
And reaches the observation imaging plane 5c.

FIG. 5 shows an example of electric wiring when only the instant photographing device 20 is mounted on the main body 11 of the slit lamp microscope. The release signal circuit is connected to the slit lamp microscope main body 11 and the instant photographing device 20 via the connectors 11a1 and 20f1. The operation permission circuit 20e is connected to the connector 1
The slit lamp microscope main body 11 and the instant photographing device 20 pass through 1a2 and 20f2. Slit lamp microscope body 11
A low-level voltage is applied to the wiring 11h inside.
At this time, no matter which side of the switch 30 is set, the operation permission circuit 20e is at the low level, and the end (B) of the operation permission circuit 20e is always at the low level. I do.

FIG. 6 shows an example of the connection of the electric wiring when only the 35 mm photographing device 8 is mounted. The release signal circuit is connected to the slit lamp microscope main body 11 and the 35 mm photographing device 8 via the connectors 11a1 and 8f1. The operation permission circuit 8e is not connected to the slit lamp microscope main body 11 because the connector 8f2 has no connection. The operation permission circuit 8e
The end (A) of the operation permitting circuit 8e is always at the high level because it is connected to the wiring 8h and is always at the high level, and the 35 mm photographing device unit 8 operates.

As described above, when two photographing devices are simultaneously mounted, a photographing device that operates only by operating the changeover switch can be selected. When one photographing device is mounted, no special operation is required. Photographic equipment can be activated.

The switch 30 for selecting and instructing the photographing device is
For example, a slide switch or a push-in switch may be used, and it is preferable that the state of the switch can be determined by hand gesture and can be changed. It is also preferable that the switch is illuminated and can be identified in a dark room.

In the above embodiment, the high level and the low level at the end of the operation permitting circuit of the photographing apparatus are set as described above, but the opposite setting is also possible.

If the connector is composed of two or more bits, it is possible to mount three or more photographing devices.

[0036]

According to the present invention, even when a plurality of photographing devices are mounted, the photographing device can be selected simply and reliably by operating one of the changeover switches. Provided is a slit lamp microscope capable of performing photographing without reducing the amount of light.

[Brief description of the drawings]

FIG. 1 is an optical arrangement diagram showing a configuration at the time of taking a 35 mm photograph in one embodiment of a slit lamp microscope of the present invention.

FIG. 2 is an optical arrangement diagram showing a configuration at the time of instant photography in one embodiment of the slit lamp microscope of the present invention.

3A is a cross-sectional view illustrating an internal structure of a photographing device used in the present embodiment, and FIG. 3B is a perspective view illustrating an internal configuration thereof.

FIG. 4 is a circuit diagram of a photographing control unit of one embodiment of the slit lamp microscope shown in FIG.

FIG. 5 is a circuit diagram of photographing control means when a 35 mm photographing device is mounted on a slit lamp microscope.

FIG. 6 is a circuit diagram of photographing control means when an instant photographing device is mounted on a slit lamp microscope.

FIG. 7 is an optical arrangement diagram showing an example of a conventional apparatus in which one photographing apparatus is mounted on a slit lamp microscope and a beam splitter is used as an optical path changing member.

FIG. 8 is an optical arrangement diagram showing an example of a conventional apparatus in which a single photographing apparatus is mounted on a slit lamp microscope and an electronically controlled reflecting mirror is used as an optical path changing member.

FIG. 9 is an optical arrangement diagram showing a configuration when a 35 mm photograph is taken in a conventional example in which two photographing devices are mounted on a slit lamp microscope and a beam splitter is used as an optical path changing member.

FIG. 10 is an optical arrangement diagram showing a configuration at the time of instant photographing in a conventional example in which two photographing devices are mounted on a slit lamp microscope and a beam splitter is used as an optical path changing member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Slit lamp part, 2 ... Variable magnification objective microscope part, 3 ... Photographing apparatus, 3b ... Beam splitter, half mirror, 4 ... Binocular eyepiece microscope part, 5 ... Eyepiece lens part, 7 ... Eye to be examined, 8 ... 35mm photograph Photographing device, 8b ... Reflection mirror, 8c
... Relay lens, 8d ... Reflection prism, 8e ... Photo film, 20 ... Instant photography device, 30 ... Switch, 42 ... Release button, 81 ... Rotary solenoid, 82 ... Electrical control board.

Claims (2)

(57) [Scope of request for utility model registration] A slit lamp microscope including a main body having a slit lamp optical system for illuminating an eye to be inspected with slit light and an observation optical system for observing the illuminated eye. In the above, the main body is individually mounted, or both are mounted.
A first imaging device for imaging the eye to be examined
And the second photographing device, and the first photographing device and the second photographing device are both
When worn on the body, one of them can be activated selectively.
Selection instructing means for causing the first photographing device and the second photographing device
When the person alone is attached to the main body,
Action that permits the operation regardless of the instruction of the column
A slit lamp microscope comprising: permission means . 2. A slit lamp microphone according to claim 1.
In the scope, each of the operation permission means includes the first photographing device and the second photographing device.
And the first imaging device and the second imaging device are mounted together.
An operation permission circuit connected to each other when the operation is performed, and a photographing device provided with the operation permission circuit.
A circuit for providing a signal for permitting operation of the apparatus, wherein the selection instructing means includes a first photographing apparatus and a second photographing apparatus.
When both devices are mounted on the main unit,
Selection to enable any one of the circuits that permit operation
A slit lamp microscope.