JPH066135B2 - Lighting equipment for medical optical equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a medical optical device for treating a target object while observing the target object, and more particularly to an illuminating device for a surgical microscope.

[Conventional technology]

In recent years, microsurgery has been actively performed while performing microscopic observation while enlarging observation under a microscope, and according to this, the surgery can be performed accurately,
We have achieved great results in various fields including ophthalmology, brain surgery and orthopedics.

Since the microsurgery is performed under a microscope, it is necessary to illuminate the surgical field with ordinary high-illumination light in addition to the usual surgical light, and the surgical microscope is equipped with a light source such as coaxial illumination or oblique illumination. is doing.

However, the lamp bulb that is the light source of the above-mentioned illumination is
Although its life is about several tens of hours, it is preferable to replace it periodically so as to prevent it from being unlighted during surgery.
Further, even if the valves are replaced regularly, the valves may be cut off during the operation due to variations in quality of individual valves and usage conditions. At that time, since it is necessary to quickly replace the valve, various valve replacement methods have been considered. For example, as disclosed in Japanese Utility Model Laid-Open No. 52-160345, when two lamp houses are arranged side by side and one of them is used as a spare, and a lamp in the other lamp house is normally turned on and it is cut off. There is a method of moving the two as a unit and lighting the bulb in the spare lamp house.

Further, as a similar light source compensating device, the actual light source is Shokai 53-193.
As disclosed in Japanese Laid-Open Patent Publication No. 74-74240 and Japanese Laid-Open Patent Publication No. 56-16240, a plurality of bulbs are attached to a fan-shaped rotatable valve holding means, and when a lit bulb is burnt out, it is reserved at that position. And a device for switching to a spare valve by interlocking an optical system such as a mirror with a power source when the main valve is derailed, as disclosed in Japanese Utility Model Laid-Open No. 55-48104. .

On the other hand, when performing microsurgery, there are cases where several types of illumination are used simultaneously or by switching, and various illumination devices have been devised for that purpose. As an example, there is a system in which the coaxial illumination system and the oblique illumination system are independent from each other and each uses a different lamp bulb as a light source.

[Problems to be solved by the invention]

However, in the device described in Japanese Utility Model Laid-Open No. 52-160345, if the bulb is cut during the operation, it will not be lit during the replacement of the lamp house, and the operator's visual field will be almost dark. Also, if the coaxial illumination system and the oblique illumination system are independent of each other, if the bulb is cut off when only one of them is used, the operator's field of view remains dark until switching to the other illumination is completed. I have to stop the surgery. Further, when surgery is impossible except for the coaxial illumination in the case of brain surgery, the bulb must be replaced, and the surgery must be interrupted.

In microsurgery, the surgical target is a very small part, and it is often an important organ such as the eyeball or brain.If the operator's visual field becomes dark when the valve is cut off, the surrounding tissue will be mistakenly mistaken. There is a risk of injury and, if so, could cause serious disability to the patient.

Also, in the device described in Japanese Utility Model Laid-Open No. 53-19374 and the device described in Japanese Utility Model Laid-Open No. 55-48104, it is inevitable that the visual field becomes dark at the time of switching, and the switching means has a mechanical structure. Since it has a complicated valve replacement method, when the spare valve runs out, it becomes a completely dangerous situation.
Also, when the switching means fails, it not only loses its function as a compensating means, but it takes a considerable time to restore the lighting due to the complexity of valve replacement and the need to repair mechanical parts.
May cause serious danger.

The present invention has been made in view of the above situation, and even if a valve breakage occurs during surgery, the operative field does not become dark, and thus accidentally damages the surrounding tissue accidentally. It is an object of the present invention to provide an illuminating device for medical optical equipment such as a surgical microscope which can be prevented and has a simple structure and is extremely safe and highly reliable.

[Means and Actions for Solving Problems]

The illuminating device according to the present invention is a illuminating device for medical optical equipment having one or a plurality of illuminating systems, and a plurality of bulbs that are independently replaceably housed in a single lamp house and are simultaneously lit. If one of the bulbs is cut off, the lighting is continued by the light supply from the remaining bulbs, and the other bulb is cut off while the other bulb is still lit. The illumination light is always ensured during the use of the device by replacing the.

〔Example〕

Hereinafter, the present invention will be described in detail based on the illustrated embodiments.

FIG. 1 shows the structure of the first embodiment of the present invention, in which 1 is a main body and 2 is a power source. Power supply 2 allows valves 7a, 7
b lights at the same time. The condenser lenses 5a and 5c are bulbs 7.
The light of the filaments a and 7b is condensed on the light guide paths 4a and 4b, respectively. Further, the relay lens 5b causes the light of the bulb 7a to enter the light guide path 4b via the condenser lens 5c, and at the same time, allows the light of the bulb 7b to enter the light guide path 4b via the condenser lens 5a.
It is incident on a. At this time, the bulbs 7a and 7b do not have to be conjugate with the relay lens 5b, and may be arranged so that the light of the bulb 7a enters the light guide path 4b and the light of the bulb 7b enters the light guide path 4a. Also, the light guide paths 4a, 4
b may be an optical fiber bundle or a light guide means by a lens system. 3a and 3b are valve sockets that can be independently attached and detached from the outside, and are electrically connected as they are attached to the connectors 6a and 6b provided on the main body 1. When attaching / detaching 3b, it is not necessary to perform an electrical connection work.

If this embodiment is applied to a surgical microscope, it becomes as shown in FIG. The two light guide paths 14a and 14b are connected to the mirror body 11 and the oblique illumination device 12, respectively. The light emitted from the emission end surface 14a of the light guide path 14a connected to the mirror body 11 illuminates the observation target 19 via the coaxial illumination optical system 15 and the objective lens 13. In addition, the light guide path 14 connected to the oblique illumination device 12
The light emitted from the emission end surface 14b 'of b illuminates the observation target 19 via the oblique illumination optical system 16. Reference numeral 17 is an imaging lens, and 18 is an eyepiece tube.

In the apparatus of this embodiment, the bulbs 7a and 7b are normally turned on at the same time. Here, even if one of the valves, for example, 7a is cut off, the light of the normal bulb 7b is incident on the light guide path 4a by the relay lens 5b.
Both of the illumination systems to which light is supplied by b are guaranteed to have a certain amount of light. The same applies if the valve 7b is cut off and the valve 7a is normal. Therefore, the first
The light guide paths 4a and 4b in the figure are replaced by the light guide paths 14a and 14b in FIG.
If both of the bulbs are cut off, the coaxial illumination and the oblique illumination will not be completely dark. Note that it is extremely rare that both valves will open at the same time.

If one bulb is cut off, the illumination can be restored to normal without interrupting surgery by replacing the bulb socket holding the broken bulb while continuing to observe with the light of the other bulb.

FIG. 3 shows the structure of the second embodiment, in which 21 is a main body and 22 is a power source. Similar to the first embodiment, the valve 2
7a and 27b are attached to separate valve sockets 23a and 23b, and the valve sockets 23a and 23b are the connector 2
It is electrically connected to the power source 22 via 6a and 26b and is detachably attached to the main body 21 individually.
The lights emitted from the bulbs 27a and 27b are concave mirrors 28a and 28a, respectively.
28b and the condenser lenses 25a and 25b to reach the reflecting mirror 20 having a square cross section. One of the diagonal lines of the reflecting mirror 20 coincides with the straight line connecting the bulbs 27a and 27b. Here, the light fluxes from the two directions are equally divided into two in the vertical direction and are merged to form the focusing lenses 29a and 29b and the reflecting mirror 20.
The light guide path 24a arranged on the extension of the other diagonal line of
It is incident on 24b. That is, 1/2 of each of the lights emitted from the bulbs 27a and 27b enter the light guide paths 24a and 24b.

The structures of the valve socket 23a and the connector 26a used in this embodiment are shown in FIGS. 4 (A) to 4 (C). 4 is a front view of the valve socket 23a, FIG. 4 (B) is a sectional view taken along the line BB of FIG. 4 (A), and FIG. 4 (C) is of the connector 26a provided on the main body 21 side. It is a front view. The valve 27a is attached to the valve receiver 33 as shown by the dotted line. The valve socket 23a has its guide pins 34a and 34b connected to the guide hole 3 of the connector 26a.
5a and 35b are respectively fitted and pushed in to be positioned and fitted. At this time, the connector 32 on the side of the socket 23a and the receptacle 36 on the side of the connector 26a are fitted together to be electrically connected. With this structure, the valve sockets 23a can be individually attached and detached from the outside of the main body 21.

The structures of the valve socket 23b and the connector 26b are the same as above.

Also in this embodiment, as in the first embodiment, even if one of the bulbs is cut off, the amount of light incident on each of the light guides 24a and 24b is guaranteed to be 1/2 of the normal amount.

FIG. 5 shows a structure of an example in which the present invention is applied as a light source of a single illumination means as a third embodiment. 41 is the main body,
42 is a power source, 43a and 43b are valve sockets that can be separately attached and detached from the outside, and 46a and 46b are connectors.
The light emitted from the bulbs 47a and 47b is reflected by the concave mirrors 48a and 4b.
8b and the condenser lenses 45a and 45b form a parallel light beam, which is directed to the mirror 40 having a cross section of a right triangle. Mirror 40
Has its cross-section and each apex aligned with the end of the light beam, and its reflection surface and the straight line connecting the bulbs 47a and 47b and the light guide path 4
It is arranged so as to form an angle of 45 ° with respect to both extension lines of the central axis of No. 4. With this configuration, the valves 47a, 4
The light emitted from 7b travels in the same direction and enters the light guide path 44 via the focusing lens 49.

This embodiment can provide a strong light intensity when only a single lighting means is used, and it also functions as a highly safe light source in which the light intensity does not become zero when the lamp burns out. or,
When there is a sufficient amount of light under normal conditions, the bulbs 47a, 47
By setting the current value of b lower than the rated value, the valve 47
The life of a and 47b can be extended, and the safety is further increased.

FIG. 6 shows the structure of an example in which an optical fiber bundle is used as the light quantity dividing / combining means as the fourth embodiment. 51 is the main body,
Reference numeral 52 denotes a power source, and the light emitted from the bulbs 57a and 57b is concave mirrors 58a and 58b and condenser lenses 55a and 5b, respectively.
5b allows branching portions 54a ', 54b' and a joining portion 54
It is incident on the end faces of the optical fiber bundles 54a and 54b having a "and 54b". The fiber bundles 54a and 54b are bisected by branching portions 54a 'and 54b', respectively, and the merging portion 5
At 4a "and 54b", one half and the other half merge. In this way, the bulb 57 is attached to one optical fiber bundle.
Half of the lights of a and 57b are incident. Therefore, even if one of the bulbs is cut off, the optical fiber bundle 5
The light passing through 4a and 54b will be secured by the other normal bulb. On the other hand, since the valves 57a and 57b are individually and independently attached to the detachable valve sockets 53a and 53b as in the previous embodiment, they can be replaced promptly even when one of them is cut.

7 and 8 show the structure of the fifth embodiment. FIG. 7 shows the light source device, which has the same basic configuration as a conventional light source device for two-system illumination. 6
Reference numeral 1 is a main body, 62 is a power source, and valves 67a and 67b are provided.
The light emitted by the concave mirrors 68a, 68b and the condenser lens 65.
a and 65b through the independent light guide paths 64a,
It is incident on 64b.

When illuminating only one system using this light source device, a field of view can be secured when the lamp burns out by using an optical fiber bundle as shown in FIG. In FIG. 8, the optical fiber bundle 71 has a merging portion 74 and is divided into two branch portions 71a and 71b. This optical fiber bundle 71 is attached to the light guide paths 64a and 64b in FIG. 7 by using the adapters 72b and 72c, and the end face 7
The light emitted from each bulb 67a, 67b is made to enter into 3b, 73c, respectively. Then, the luminous flux emitted from the end face 73a becomes the sum of the luminous fluxes incident on the end face 73b and the end face 73c. Therefore, by randomly arranging the unit optical fibers on each of the end faces 73b and 73c, the light from the two bulbs 67a and 67b can be uniformly used as a light source for one illumination system.

If the optical fiber bundle having the structure shown in FIG. 8 is used, the safety intended by the present invention can be ensured even in the light source device having the structure shown in FIG. In addition, the above fiber bundle is reversed in the fifth direction.
When used in the apparatus shown in the figure (third embodiment), two systems of illumination can be performed by the apparatus shown in FIG.

〔The invention's effect〕

As described above, since the illumination device according to the present invention uses a plurality of bulbs as light sources at the same time, even if one of the bulbs is cut off, the light amount is reduced but the light does not become dark, and observation and treatment can be continued. Further, since each broken valve can be replaced independently, the valve can be replaced while continuing observation and treatment. Further, the light quantity can be easily and significantly increased as compared with the case where only one bulb is lit, and if the same light quantity is used, the load of each bulb can be reduced, so that the life of the bulb can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a first embodiment of an illuminating device according to the present invention, FIG. 2 is a diagram showing a case where the first embodiment is applied to a surgical microscope, and FIG. 3 is a structure of a second embodiment. Showing the fourth
7A to 7C are views showing the structure of the valve socket and the connector of the second embodiment, FIGS. 5 and 6 are views showing the structures of the third and fourth embodiments, respectively. Figure and 8
The drawings are views showing the light source device and the optical fiber bundle of the fifth embodiment, respectively. 1 ... Main body, 2 ... Power supply, 3a, 3b ... Valve socket, 4a, 4b ... Light guide path, 5a, 5b ... Condensing lens, 5b ... Relay lens, 6a, 6b ... Connector.

Claims (1)

[Claims] 1. An illumination device for medical optical equipment, comprising at least one illumination optical system and an observation optical system for observing an object illuminated by the illumination optical system, wherein the illumination optical system is a single lamp house. An illuminating device comprising a plurality of bulbs, each of which is housed independently of each other so as to be exchangeable, and which are simultaneously turned on.