JPS6139367Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating circuit for an endoscope equipped with a holographic device.

When a coherent light such as an argon ion laser is irradiated onto an observation target, and the object light obtained as reflected light and the reference light, which is a part of the laser directly incident on a photographic plate, are superimposed on a photographic plate, an interference pattern is formed. A group is formed.

Since the group of interference fringes contains three-dimensional information regarding the object to be observed, a three-dimensional image of the object to be observed can be reproduced by irradiating the photographic plate with a laser having the same wavelength. The above technology is called holography, and one of its applications is the double exposure method. This is because the exposure using the holography technique described above is performed at two very close times, but when the photographic plate obtained in this way is reproduced, the interference fringes recorded at the two times are simultaneously reproduced, and they overlap each other. cause interference. Therefore, if the object to be observed undergoes slight deformation or movement between the two times, the reflected object light will be recorded on the photographic plate with a slightly different phase, causing interference during reproduction. be. In this way, if the double exposure method is used, the 3
Dimensional deformations and movements can be recorded and played back.

When the holographic technology and double exposure method described above are applied to an endoscope, the state inside the body cavity can be recorded in three dimensions and reproduced at any time, and the state of motion inside the body cavity can also be recorded and reproduced. This has the advantage that, for example, tumors beneath the surface tissue, which are normally difficult to detect, can be discovered based on differences in their movement states.

However, when applying the above-mentioned holography technology to an endoscope, it is necessary to fully consider safety measures against lasers. In other words, it is necessary to accurately switch between the observation light source using a normal light source and the laser light source used for holography to prevent failures in photography, as well as to protect the observer by properly switching the shutters provided on the laser light source and camera unit. It is necessary to operate it correctly, and it is also necessary to consider measures against vibrations of the device that are harmful to photography.

The present invention has been developed in view of the above-mentioned needs, and includes a light source switching circuit for accurately switching between a normal light source for observation and a laser light source used for holographic photography, and also includes By connecting the eye shutter and the laser shutter of the laser light source with an interlock circuit to protect the observer's eyes, etc., and by providing a delay timer as a countermeasure against vibration, holographic photography is performed after the entire device has stabilized. The object of the present invention is to obtain an operation circuit for an endoscope equipped with a holographic device that can perform holographic imaging safely and accurately.

Therefore, the present invention includes an interlock circuit for confirming the connection between the endoscope section and the camera section and the closing of the eye shutter, a switching circuit for switching the optical path between the observation light source and the laser light source, and a laser emission control circuit. It has a delay timer that makes it execute after a certain period of time,
In the interlock circuit, when the connection between the endoscope section and the camera section is electrically confirmed, the switching circuit is activated by operating the eye shutter closure confirmation switch. The present invention is characterized in that the delay timer is activated at the same time as the film shutter is opened.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic explanatory diagram of an endoscope equipped with a holography device, and the entire body is shown in a light source section 1 and an endoscope section 2.
and a camera section 3.

The light source unit 1 includes an observation light source 4 using a normal light source.
, a laser light source 5 for performing holographic photography, and its control device 6, and each light source is provided with an observation light shutter 7 and a laser shutter 8, which are opened and closed as necessary. The laser shutter 8
A spectroscopic mirror 9 provided next is for separating the laser beam generated from the laser light source 5 into irradiation light that irradiates the observation target and reference light that directly goes to the camera section 3. , the irradiation light is
The irradiation light reaches the endoscope section 2 via the light transmitting fiber bundle 10, and the reference light is sent to the camera section 3 via the reference light transmitting fiber 11.

The endoscope section 2 opens the irradiation light transmitting fiber bundle 10 and the observation light transmitting fiber bundle 12 at the distal end 13, and displays an object image and the irradiation light produced by the observation light being reflected by the observation target. A light guide fiber bundle 14 or a relay lens system (not shown) is connected to the observation window 15 and the handle 16 to guide the object light reflected by the object to be observed.
Provided between. The endoscope section 2 and camera section 3 can be appropriately connected at the rear end of the handle section 16, and a connection confirmation switch 17 is provided to confirm the connection between the two.

The camera section 3 includes a viewfinder 18 and a photographic plate 19.
An optical path switching mirror 21 provided in front of the film shutter 20 sends the object image sent via the light guide fiber bundle 14 to the finder 18 via a prism 22, Send object light to. In addition, in front of the viewfinder 18, in order to protect the eyes of the observer from the laser beam in the event that the optical path switching mirror 21 malfunctions, an eye shutter 23 consisting of a laser reflection filter or the like is provided, and it is confirmed that the eye shutter 23 is closed. An eye shutter closure confirmation switch 24 is provided for this purpose. Further, the eye shutter 23 can be locked mechanically or electromagnetically.

Next, an embodiment of an operation circuit for an endoscope equipped with a holographic device according to the present invention will be described based on the circuit diagram shown in FIG.

In the drawing, 17 indicates a connection confirmation switch,
If the connection between the endoscope section 2 and camera section 3 is proper, the pilot lamp 25 is turned on and the coil 26 is activated. The coil 26 is interlocked with a B contact relay 27 and an A contact relay 28, and the B contact relay 27 is opened and the A contact relay 28 is closed. The a contact relay 28
When the coil 29 is closed, the coil 29 is activated. The coil 29 is linked to an a contact relay 30 and a b contact relay 31, so that the a contact relay 30 is closed and the b contact relay 31 is opened.

Reference numeral 24 indicates an eye shutter closure confirmation switch, and when this switch is closed, the coil 32 is activated and the a contact relay 33 is closed. The coil 34 is interlocked with a b-contact relay 35, and together with the coils 26, 32 and b-contact relay 27, these constitute an interlock circuit. That is, for example, if the eye shutter closure confirmation switch 24 becomes short, the coil 34 is activated and the b contact relay 35 is activated before the endoscope section 2 and camera 3 are connected.
Therefore, even if the connection confirmation switch 17 is closed, the circuit operation does not proceed. In this manner, the a-contact relays 28 and 33 are closed and the circuit operation can proceed only after the connection confirmation switch 17 and eye shutter closure confirmation switch 24 operate correctly.

The solenoid 36 is for closing the observation light shutter 7 and is interlocked with an a contact relay 37. Further, the solenoid 38 is connected to the laser shutter 8.
It is used to open the circuit, and is interlocked with the b contact relay 39.

When the a-contact relays 28 and 33 are closed, since the a-contact relay 30 is already closed by the operation of the coil 29, the solenoids 36 and 38 are actuated to close the observation light shutter 7 and open the laser shutter 8. Light source switching is complete.

The solenoid 40 is for opening the film shutter 20 and operates in conjunction with a residual contact 41.
In addition, 42 indicates a delay timer, and in order to prevent the vibration of the device from adversely affecting the photographing, after a certain period of time has elapsed, the control device of the laser light source 5 is 6
is activated to emit laser light.

The b contact relay 44 is opened by, for example, a signal from the control device 6 or a manual operation after the laser emission is completed, and the solenoid 40 is thereby restored and the film shutter 20 is closed.

The coil 29 is restored after charging the time limit capacitor 45, but at this time the A contact relay 30 is opened and the B contact relay 31 is closed. When the a-contact relay 30 opens, both the solenoids 36 and 38 are restored, so the a-contact relay 37 opens and the b-contact relay 39 closes.

Reference numeral 46 indicates a light receiving element for confirming that the laser is not emitting light, and it is provided as necessary. When the laser is not emitting light, the coil 47 is activated to close the b contact relay 48. .

Reference numeral 49 indicates a solenoid for opening the eye shutter 23, and when this solenoid is activated, the eye shutter closure confirmation switch 24 is opened to complete a series of photographing operations.

Note that 50 and 51 indicate diodes for preventing stray circuits.

Next, the operation of the above configuration will be explained.

When the endoscope is inserted into a body cavity and the observation object is illuminated from the tip 13 with observation light from the observation light source 4, the object image is transmitted from the finder 18 via the light guide fiber bundle 14 or the relay lens system. be observed. This allows the practitioner to determine the position for holographic imaging. After confirming that the endoscope section 2 and camera section 3 are properly connected using the pilot lamp 25 linked to the connection confirmation switch 17, the eye shutter 23 is closed.
The eye shutter closure confirmation switch 24 is activated to close the observation light shutter 7, and at the same time, the laser shutter 8 is opened to complete the switching of the light source. coil 2
6, 32, 34 and a contact relays 28, 33 and b
The interlock circuit constituted by the contact relays 35 and 27 is for confirming the connection between the endoscope section 2 and the camera section 3 and the closing of the eye shutter 23, and the next operation is performed only after confirming these operations. can move into action.

When the switching of the light source is completed, the a-contact relay 37 interlocked with the solenoid 36 is closed, so the solenoid 40 is operated and the film shutter 20 is opened. Then, the residual contact 41 interlocked with the solenoid 40 closes and activates the delay timer 42. The delay timer 42 operates the control device 6 of the laser light source 5 to emit laser light after the vibration of the device has subsided after a certain period of time has passed.

The laser emitted from the laser light source 5 passes through the spectroscope 9
The irradiation light is divided into irradiation light and reference light by the irradiation light beam, and the irradiation light irradiates the observation target from the tip 13 of the endoscope section 2 through the irradiation light transmitting fiber bundle 10, and is reflected by the observation target. The emerging object light passes through the light guide fiber bundle 14 and reaches the photographic plate 19 of the camera section 3. On the other hand, the reference light is transmitted to the photographic plate 19 via the reference light transmitting fiber bundle 11.
directly enters the photographic plate 19 together with the object light.
to expose.

By irradiating the photographic plate 19 thus constructed with a laser beam of the same wavelength, a three-dimensional image of the object to be observed can be reproduced at any time, and by performing the double exposure method, the state of motion of the object to be observed can also be recorded. be able to.

When holographic imaging is completed, the b contact relay 44 is activated by a signal from the control device 6, for example.
When opened, the solenoid 40 closes the film shutter 20.

Further, the a-contact relay 30, which had been closed by the coil 29, is opened, the solenoids 36 and 38 are restored, and the light source is switched to the original observation light source 4. Further, the coil 47 is connected to the b contact relay 4 after confirming that the laser is not emitted by the light receiving element 46.
Close 8. This activates the solenoid 49 to open the eye shutter 23 and enable the next observation.

By sequentially repeating the above operations, observation and holographic imaging of the inside of the body cavity can be safely performed.

According to the operation circuit for an endoscope equipped with a holography device according to the present invention having the above-described configuration and operation,
The observation light source and the laser light source can be switched accurately, and the eye shutter of the camera section and the laser shutter of the laser light source can be connected by an interlock circuit to protect the observer's eyes from the laser. The delay timer stabilizes the entire apparatus and can produce a significant effect in that holography can be taken accurately later.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of an endoscope equipped with a holographic device, and FIG. 2 is a circuit diagram showing an embodiment of an operation circuit for an endoscope equipped with a holographic device according to the present invention. DESCRIPTION OF SYMBOLS 1... Light source part, 2... Endoscope part, 3... Camera part, 4... Observation light source, 5... Laser light source, 6...
...control device, 7...observation shutter, 8...laser shutter, 17...connection confirmation switch, 23...
... Eye shutter, 24... Eye shutter closure confirmation switch, 26, 32, 34... Coil, 27,
35...B contact relay, 28, 33, 37...a
Contact relay, 36, 38... Solenoid, 41...
...Residual contact, 42...Delay timer.

Claims (1)

[Scope of utility model registration request] an interlock circuit for confirming the connection between the endoscope section and the camera section and the closing of the eye shutter;
It has a switching circuit for switching the optical path between the observation light source and the laser light source, and a delay timer that causes the laser to emit light after a certain period of time, and the interlock circuit controls the connection between the endoscope section and the camera section. The switching circuit is operated by operating an eye shutter closure confirmation switch under electrically confirmed conditions, and as the switching circuit is operated, the film shutter of the camera is opened and the delay timer is operated. An operation circuit for an endoscope equipped with a holographic device.