JPS58183156A - Laser apparatus for treatment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method for transmitting a laser beam to the optical waveguide fibers using one therapeutic radar device having an optical waveguide core 4 for transmitting laser beams of various energies. This invention relates to a civil service device VC with an improved connector for convenient use in the input section.

(Technical Background and Problems of the Invention) Currently, a medical device for each building using LED light is being proposed. There is a laser treatment device that removes and treats colored birthmarks.

Traditionally used methods to treat birthmarks include:
Many methods are known, including the use of cell destruction with dry ice, the skin grafting method, the excision method, the thin scraping method, and the method of baking the collar using an electric drying method, but all methods are invasive. The effect is not as expected compared to the size,
The treatment itself causes pain to the patient, requires hospitalization, and has the disadvantages of a long treatment period.
Improvements in treatment methods have been desired. Recently, with the development and improvement of the Rade device, a method of burning the affected area using a laser beam has been proposed, and although the number of cases is small, it is being put into practical use, and its therapeutic effects are also being recognized.

However, when performing treatment using Rade light, the conventional #2 system uses a method in which the Rade light from the Rade light source is guided through a lens system, which makes it difficult to operate in the process of guiding it to the affected area. Inferior. For example, positioning when performing Radical irradiation treatment on an affected area is performed by moving the Radical oscillator or the patient himself.

As one of these improvements in operability, attempts have been made to use optical fibers in the LED light guide path.

That is, in FIG. 1, 1 is the source of the treatment device! +, 2
fi cable IA from this power supply l? ! - a laser oscillation source that operates by being supplied with energy and oscillates Raded light; a light guide member 4 containing an optical fiber is connected to the output end of the Raded oscillation source 2 via a connector 3; At the output end of the light guiding member 4, a hand piece for manual operation is equipped with a kaleidoscope made of a rod-shaped base glass, which uniformizes the light intensity distribution of the emitted radar light via the connector 5. 6 are connected to form a device.

FIG. 2 is a cross-sectional view (2) of the connector 3, that is, the connector portion that inputs the radar light output from the laser oscillation source 2 to the end face of the optical fiber with high precision. That is,
The original fiber 11 forming the connector part Vi light guiding material 4 is inserted into the tubular sleeve 7'' 712 and fixed with adhesive, and the optical fiber 11t-
A certain length of the protective outer wax and the cladding for forming the anti-IR surface are peeled off from the fiber end face to expose the core 13, and this repaired end face is used as the laser input end and the exposed core core 3 The core holding hole 14 is centered on the outer peripheral surface of the tip.
It is held by a cap-shaped core supporter 14 having a breather.

The core supporter 14 is fixed to the sleeve 12Vc, and the surface on the laser beam incident side is generally a mirror surface or a diffusing surface to reflect or scatter the radar light, and the core support 14 is fixed to the sleeve 12Vc.
It is V-shaped so that the led light does not enter any areas other than the ground in 3.

15 is provided on the outside of the sleeve 12, and is connected to the cap nut 1.
The lens 16 is fixed in the receptacle 17 with a flag 8, and the lens 16 is screwed into the receptacle 17, and the lens 16 is positioned so that the focused light of the lens 16 comes to the radar light incident end surface of the core 13. Km is not included to ensure good bonding. The Raded light 20 oscillated from the Raded oscillation source 19 is focused by the lens 16 and placed at a position in front of the lens focal point and at the same diameter as the core 13 so that all of the output light enters the Raded light incident end surface of the core 13. It is configured such that the optical path position II VC core 3, which is bundled with the same diameter VC, is located. As a result, the Rede light is the core JJK of the original fiber 11.
It is guided, propagates within the core 13, and is sent to the handpiece 6.

By the way, if the Rade S class of the Rade oscillation source 19 is a solid Rade, and if its oscillation method uses pulse oscillation that provides energy, the Rade light output is high energy, so the destructive power is large and dangerous. Therefore, it is difficult to perform optical alignment of each of the radar oscillator 19, lens 16, and core sensor 3, and generally it is difficult to perform the optical alignment of each of the radar oscillator 19, lens 16, and core 3. The above-mentioned optical alignment is performed using a light source (for example, He-N, Rede, etc.) to align each optical component, but the light source is for convenience only. The alignment of the Rade oscillation source 19 with respect to the Raded light, which must be aligned from the beginning, cannot be determined unless the Raded light is actually irradiated. Therefore, it is necessary to check the relative positions of the guide light and the Radhe light.

At this time, if a part of the high-energy Raded light from the laser oscillation source 19 does not enter the incident end face of the core 13, this Raded light will strike the core supporter 14. Also,
Even if a deviation occurs in the optical alignment due to vibration or impact, part or all of the high-energy laser beam may hit the core supporter J4.

The core supporter 14 is generally made of brass or stainless steel due to the need to provide it with high processing precision and at low cost. Energy j1# (for example) in the case of self-oscillation requires 40 noers and irradiation time 1/1000 seconds), so if the core supporter 74 is erroneously irradiated with Radhe light, the irradiated metal surface will easily melt. The transpiration material generated at that time adheres or evaporates on the radar light incident base surface and lens surface of the core 13 of the optical fiber 11, reducing the transmittance of the radar light, and the light guiding radar to the base. There is a problem that variations occur in the distribution of light, resulting in variations in the LED light output during treatment, which has a serious adverse effect on the therapeutic effect, resulting in unusability.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and utilizes the energy that can melt metal when the oscillated radar light is focused by a condensing lens, etc., and guides it through an optical fiber. When using an optical fiber or the like as a light guiding member for therapeutic Rede's ferric acid, which uses an optical member to treat the affected area, when entering the Rede's light, for example, during optical alignment adjustment or due to vibration or impact, the light may An object of the present invention is to provide an optical fiber connector that can transmit Raded light without adversely affecting optical components even if a part of a core supporter is erroneously irradiated with Raded light due to axis misalignment. It is.

[View # of invention]

That is, in order to achieve the above object, the present invention condenses the Radhe light from an oscillation source that oscillates the V-guide light using a condenser lens, and makes it incident on the end face of the optical fiber core of the optical fiber light guide path member to generate the Radhe light. In an optical fiber connector for connecting the laser oscillation source and a light guide member in a therapeutic RED apparatus that guides a 2V-guided light and performs a RADE treatment using the led light guide, the LED light of the light guide member is The seven fiber cores on the incident side are exposed for a predetermined length, and a core holder for inserting and holding the core is provided in the middle of the exposed end, and the exposed end of the core is made to protrude from this core holder, and the end surface of the core is connected to the light converging surface. It is arranged and held at a position behind the focal point of the lens, thereby condensing the light behind the end face of the core with the condensing lens and expanding the spot diameter of the dangerous light, thereby reducing the energy density. This prevents the core holding cape from being melted or scattered by the lede light that deviates from the end face of the core.

[Embodiments of the invention]

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

The present invention relates to the structure of an optical fiber connector portion, and the basic structure is the same as the conventional one. The present invention makes the core protrude from the core holder so that even if the laser beam focused by the lens leaves the core of the optical fiber and enters the core holder, the incident energy density is low, and the core end face is It is distinctive in that it is placed behind the focal point of the lens.

FIG. 3 is a structural diagram showing an embodiment of the present invention. In the figure, numeral 21 is a Lehde light beam, and 22 is a condensing lens for the Lehde light. 28 is the focal position of the condensing lens 22, the core of the j7 ad fiber, and the core 27a is located behind the focal position 28 of the lens 22 and is a sporater of the focused laser beam) 41 is the incident end surface of the core 27a. The lens 22 is positioned with its optical axis aligned with the optical path position that substantially matches the effective diameter of the lens 28a.

Light 21 oscillated from a laser oscillation S (not shown)
is focused by the lens 22, and the focal position of the lens 22 is
It narrows down to the minimum at t28, but at this time the Radhe light 21
The condensed spot diameter of the lens is expressed as Dkif・0 [intestinal], where the lens focal length is f and the spread angle of the loop beam is θ, and the energy density E at that time is the average power P
Then, it is expressed as E=P/π)2(W/d). Therefore, the energy density at this focal position is maximum, and if it is away from the focal position, it is a spot.

It can be seen that as the diameter increases, the energy density decreases accordingly. The material of the core 27a of the optical fiber, which is the light propagation part of the light guide member 270, is generally made of quartz glass in the case of high-energy LED light transmission, and the diameter of the core 27a is increased within a range that effectively maintains flexibility. . This makes it possible to suppress the energy density of the transmitted Raded light to a small value and greatly extend the life of the core 21&. Furthermore, it is better to increase the aperture angle of the condenser lens 22 within the range of the numerical aperture of the four-light path member 27 to achieve a condensed spot! By slightly shifting the position of the focal length of the D Vi/J/Sakunasi, the energy density will change significantly, and by adjusting the position of the incident end surface 28d of the core 21a, the radar light can be transmitted with the minimum energy density. It can be propagated effectively.

The light guide member 27 is composed of a reflective glue 27b1 formed on the outer periphery of an optical fiber core 27a1 and a repeating sheath 27c as a protective outer sheath, and the cladding 27b and sheath J7a at the input end are partially In order to avoid melting due to Rede light, the core 271 is removed and used with only the core 271 exposed. Another 25 beams 2. A light blocking ring provided on the end face of the core 27b and the core 27e protects the core 27a.
It has a hole slightly larger than the outer diameter of the core 27a, and by guiding the core 27a through this hole, it prevents the incoming laser light from directly irradiating the shicra, do 27b, and skin fi 27cic. It is. Further repetition 2
A positioning sleeve 26 is joined to the outer periphery of the rc, and by being inserted into the holder 24 that fits and holds these aggregates, the axis of the core 21m is aligned and held with the axis of the holder 24. That will happen. At the end of this holder 24,
A core supporter 23 is attached to hold the core 271 on the optical axis of the condenser lens 22 with high positional accuracy.

It is preferable that the hole through which the core 27a of the core supporter 23 passes has the smallest gap to the extent that the core JFm can be inserted without hindrance, thereby preventing the entry of Radical light. (If the hole and the core are in contact, even at a portion, the law of total reflection is broken, energy absorption occurs at the contact area, core surface destruction from the contact area progresses, core damage occurs, and light propagation is adversely affected. ) Further, the entrance side surface 2 of the core supporter 23 is moved by a predetermined distance from the entrance surface 28d of the core 271L without causing any inconvenience in terms of the structure.
By making the end face of the core 27a protrude from the core 3a and positioning it at the optical path position of the lens 22 which is behind the focal position of the lens 22 and has a spot diameter approximately the same as the diameter of the core 27a, a sufficiently small value of energy density can be achieved. The Rede light that deviates from the core incident end surface 28dvt is diffused so that the energy density of the Rede light becomes small at the position of the core supporter 23. This is to prevent phenomena such as scattering from occurring. By being able to prevent this scattering during melting, staining and damage to optical components can be prevented and stable laser beam propagation can be carried out with the propagation efficiency as intended.

The radar incident side surface JJa of the core supporter 23 is formed by mirror polishing, metal plating, vapor deposition, etc. to form a reflective surface, or to form a diffusing surface so that light is scattered. Furthermore, in terms of materials, metals with extremely high melting points, ceramics, silica, and quartz-based galan having a slightly lower refractive index than the core 27m are effective.

As described above, the optical fiber connector for connecting the light guiding path member with the Raded oscillation source has the core 27 & protruding from the core supporter 23, and is located at the optical path position behind the focal position of the lens 22. Since the core end face is located at a position where the diameter of the groove is approximately the same as the diameter of the end face of the core 27a, the LED light is not reflected behind the end face of the core 27a. As the diameter of the beam increases, the energy density of the Rede light becomes lower at the rear. Therefore, even if the core supporter 23Vt radar light were to arrive, its energy would be low and there would be no danger of melting or the like. Therefore, if an optical axis shift phenomenon occurs during adjustment of the optical axis or due to some factor such as vibration or shock, and the Radhe light is shifted outside the effective diameter of the core entrance end surface 211d, the core supporter 23 that receives the Radhe light
The end face 23 & of the core end face 23& is designed to reflect and diffuse the Raded light without causing melting etc. due to the laser beam, thus preventing damage to optical parts such as the core end face f lens and allowing stable Raded light propagation. . In addition, it is possible to simply connect optical connectors without significantly changing the components of conventional optical connectors
The core end of the eyeper can be made to protrude from the core supporter 23 and can be provided at the same extent behind the focal point of the lens 22.

Although one embodiment of the present invention has been described above, this invention is not limited to the embodiment H described above, and may be implemented with various modifications without changing the spirit of the invention. Not even.

Incidentally, in the above embodiment, the method of reflecting the Rade traveling light which is not incident on the core at the Rade light incident surface 23a of the core supporter 23 was used, but as a modified example, the core support as shown in FIG. a31 has a lower refractive index than core 27m,
The core 21a is made of the same type of material and has the same transmittance as the core 21a, for example, in the shape of a concave lens, so that the core x y * fil
By using total reflection to form layers 1 and 2 when viewed from 1, the connection between the outer diameter of the core 27a and the hole of the core supporter 31 can be made unnecessary, which reduces manufacturing and assembly costs. The above structure is also simple, and total reflection occurring at the interface is used to propagate light without reducing the optical beam efficiency within the core 27. In this way, the LED light that deviates from the core incident end face is transmitted through the core supporter 31 with weak energy due to the decrease in energy density due to the diameter of the spot expanding as it moves away from the core end face as described above. , each time it passes through, the radar light is bent in the outer circumferential direction and further reflected in the outer circumferential direction by the reflective surface 32a provided on the end surface of the holder 32 or the diffusing surface, and the extra light from the optical components provided inside is reflected. Therefore, it is possible to obtain an optical fiber connector with high safety and stable therapeutic effect.

〔Effect of the invention〕

As detailed above, the laser beam from the oscillation source that oscillates Rade light is condensed by a condensing lens, and the laser beam is guided by making it incident on the fiber core end face of the optical fiber light guide member.
In an optical fiber connector for connecting the Raded oscillation source and a light guiding path member in a therapeutic laser device that performs treatment using the guided Raded light, a fiber core on the Raded light incident side of the optical guiding path member is connected. A holder for inserting and holding the core in the connector is provided at the middle part of the protruding end thereof, and the end of the 7 fiber core is made to protrude from this core holder, and the end surface of the fiber core is connected to the condenser lens. Since the core is held at a position rearward from the focal point of the core, the diameter of the condensing spot by the condensing lens increases at the position of the core holder, so the energy density of the Radhe light that deviates from the core end face decreases. , there is no need to worry about the core holding material melting or scattering even if it hits the core, and therefore the connector's 7-line alignment can be safely adjusted without damaging the core or condensing lens.It has an excellent simple structure. It is possible to provide a therapeutic radar device having the following characteristics.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the entire Rede treatment device, FIG. 2 is a sectional view of a main part of a conventional optical input connector, and FIG. 3 is a sectional view of a main part of an optical fiber input connector showing an embodiment of the present invention. FIG. 4 is a sectional view of a connector portion showing another modification of the present invention. 19... Laser oscillation source, 20.21... Rede leading edge, 22... Condenser lens, 13.31... Core supporter, 25... Light blocking ring, 27... Guide optical path member,
27a...Core of optical fiber.

Claims (3)

[Claims] (1) A laser beam from an oscillation source that oscillates a laser beam is directed through a condensing lens, and the laser beam is guided by making it incident on the optical fiber core base of the optical fiber VC light guide member. In a therapeutic radar device that performs treatment using light, the optical fiber connector portion for connecting the radar oscillation source and the light guide path member is formed by exposing the radar incident side of the light guiding KBN material for a predetermined length; A holder for inserting and holding the core in the connector is provided in the middle of the protruding end, and the IS of the optical fiber core is made to protrude from the holder, and the end surface of the optical fiber core is located behind the focal point of the condensing lens. A therapeutic laser device characterized by a structure. (2) The therapeutic LADE device according to claim 1, wherein the holder is made of a sterile material having a bath melting point. (3) A therapeutic radar device characterized in that the holder is formed of a light-transmitting material having a lower refractive index than the optical fiber core.