JPS5961978A - Laser irradiating device - Google Patents

Abstract

PURPOSE:To obtain a cooler for a laser irradiating device at low cost and moreover formed in a small type by a method wheein a single heat exchanger and a reservoir are provided, and cooling is performed by sending with pressure at the same time distilled water for cooling stored in the reservoir to laser beam sources of the plural number according to a single pump means. CONSTITUTION:Distilled water in the reservoir 4 is sent by the pump 3, distilled water branched to a piping 9 cools the TGA laser resonator 1, and distilled water branched to a piping 8 cools the CO2 laser resonator 2. The distilled water cooled the CO2 laser resonator 2 is returned to the reservoir 4 through a piping 7, the distilled water cooled the YGA resonator 1 is cooled by the heat exchanger 5 provided on a piping 6, and is returned to the reservoir 4. Accordingly, distilled water held at a temperature sufficient to perform cooling is supplied to the resonators 1, 2 constantly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser irradiation device, and more particularly to a technology for reducing the number of laser irradiation devices equipped with a plurality of working laser beams.

Conventionally, several laser sighting devices have been proposed that simultaneously or selectively irradiate a plurality of working laser beams having different wavelengths. For example, when the irradiated part is a living body, it is known that the interaction between the living body and the laser beam varies greatly depending on the wavelength of the irradiated laser light. According to ', it is reported that by appropriately using laser beams, surgery can be performed more effectively by taking advantage of the characteristics of laser surgery, compared to the case where only jlQ- laser beams are irradiated.

As one of the above-mentioned devices, Special 1;'1 Published in 1982-1
No. 30145 discloses a C10 device equipped with two types of working laser light sources, a CO2 laser and a YAG laser, and two light guide paths.

In this device, one of the light guide paths is a manipulator light guide path, and CO2 laser light and YAG laser light are irradiated simultaneously or selectively. The other light guide path is a fiber light guide path, and only YAG laser light is irradiated thereon.

However, all of the descriptions of these devices relate to the arrangement and configuration of the optical system, and none of them proposes a cooling technique for a plurality of laser light sources. For these devices that have multiple laser light sources, the cooling system for cooling each light source has to be multiple 4F.Therefore, for these devices, simplifying the cooling system means downsizing the device Δ and reducing costs. This was something that could be done easily and easily, and was absolutely necessary in order to create more practical equipment.

The present invention was made in view of the above-mentioned circumstances, and has the following objects.

That is, in a laser irradiation device that simultaneously or selectively irradiates laser light generated from a plurality of laser light sources for work, the laser irradiation device can be constructed inexpensively and compactly by simplifying the cooling system of the laser beam. intended to provide.

The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

In the figure, 1 is a YAG laser resonator, 2 is a C02
A laser cavity is shown. Distilled water is used to cool both of these resonators. Reference numeral 3 indicates a pump for feeding distilled water for cooling in the illustrated closed circuit, and reference numeral 4 indicates a reservoir for storing the distilled water for cooling. 5 indicates a heat exchanger for cooling the distilled water.

fJfl YAG l/- The resonator 1 is a YAG laser.
- IJ'1'7 River a [(not shown) is driven and outputs YAG laser light. Similarly, the CO2 laser resonator 2 is driven by a dedicated power supply for CO2 laser (not shown) and outputs CO2 laser light. Both of the laser beams are transmitted by a laser light guide (not shown) and irradiated onto a desired portion Q.

Here, the distilled water filled in the reservoir 4 is sent by the pump 3 and branched by pipes 8 and 9. Distilled water i, l branched into a pipe 9 flows into the YAG laser resonator 1 and cools the resonator 1.

The distilled water branched into the pipe 8 flows into the CO2 laser resonator 2 and cools the resonator 2. The flow rate of distilled water for cooling the resonator 2 is regulated by a valve 11.

Needless to say, in the YAG laser resonator 1, the excitation furanone lamp is cooled by the distilled water.

Further, the CO2 laser resonator 2 is constructed as a double tube structure equipped with a cooling jacket, and the distilled water is circulated inside the jacket to cool the four-axis resonator.

The distilled water that has cooled the CO2 laser resonator 2 returns to the reservoir 4 via the pipe 7. The distilled water used to cool the YAG laser resonator 1 is cooled by a heat exchanger 5 provided on the pipe 6 and returned to the reservoir 4. Heat exchange: At 5 t'1, tap water is flowed into the pipe J0, whereby heat exchange is performed between the tap water and distilled water, and the distilled water is cooled.

Distilled water that has been completely cooled by the heat exchanger 5 flows into the reservoir 4, so that the distilled water vortexed in the reservoir 4 is kept at a relatively low level.

Therefore, the resonators 1 and 2 are constantly supplied with distilled water to maintain a temperature sufficient to cool both resonators. Incidentally, if desired, the distilled water fed through the pipe 7 can also be configured to pass through the heat exchanger 5.

By the way, in general, when cooling an 'I YAG laser resonator, cooling water passes near a high-pressure part.

Therefore, to prevent danger, use #retained water as the cooling water,
In addition, care must be taken to ensure that metal particles do not dissolve into the distilled water. Therefore, in the present invention, heat exchanger 5. Reservoir 4. Starting with the tube 3 and ending with each piping, it is made of a material that is insoluble in distilled water, such as stainless steel or resin.

In addition, in the present invention, the UXYAG Rayleigh resonator 1 can be
Since both the O2 laser and the cylinder 2 are cooled by the same cooling system,
The resonator 2 is treated with distilled water for cooling, and special measures 14 are taken as described later. This will be explained below.

FIG. 2 is a cross-sectional and schematic diagram showing the CO2 laser resonator 1 shown in FIG. 1 and FIG. As shown in the figure, the inner tube 10
In the center of 7 are two cylindrical anode holders 1.06,
106' are provided, and anodes 105 and 105' are fixed to each. The anode boulders 106, 106' are made of a highly thermally conductive and highly insulating bar made of, for example, ceramic. There is an outer tube 104°10 on the outside of the inner tube 107.
4' and 112 are provided, and it is configured as a known two-clawed tube. The gap between these double tubes serves as a cooling jacket, as will be described later.

In the double tube configured in this manner, one end of an inner tube holder 108 formed in a cylindrical shape is inserted and fixed into one end of the inner tube 107. The other end of the holder 108 is inserted and fixed into a recessed portion of the mirror boulder 101. One ψii1 part of the outer tube 104 is fitted and fixed to one end of the outer tube holder 102, and a JΦ portion 727 is formed at the other end of the holder 102.
The second part is tightly fixed to the aluminum mirror holder 101 by means of nails, screws, or the like.

As is clear, a resonator mirror 110 is fixed to the mirror holder 101. Inner circumferential dimension of inner tube holder 108 -
A cathode 109 is fixed to and grounded.

Here, the outer tube boulder 102 and the inner tube holder 108
For example, UF, which is insoluble in distilled water and has good thermal conductivity, such as stainless steel or ceramics.
The first advantage is used. In consideration of ease of pressurization and reduction of production costs, it is desirable to use stainless steel for the component parts.

- Also, for the mirror holder 108, brass or the like having excellent heat conductivity is used. Note that 10:3 in the figure is an inlet for distilled water for cooling, and distilled water is introduced into the cooling jacket by connecting the pipe 8 (FIG. 1).

Similarly, an inner tube holder 108' is attached to the other end of the inner tube 07.
However, the outer tube holder 102' is fixed to the outer tube j04'. A mirror holder 101' is fixed to these outer tube holder 102'i19 and inner tube holder 108'. In Fig. 110', =1 bar)-]'-k* resonator mirror, 109
It goes without saying that ′ is a cathode. The cathode 1 (19
111 is grounded like 4'M109.

In the resonator shown in this embodiment, an O-ring or the like is provided at the joint of each component to maintain airtightness.

In the resonator, a cooling water inlet 10 is connected to the pipe 8 (Fig. 1).
The distilled water for cooling introduced into the tube 3 passes through the openings provided in the anode holders 106 and 106' within the cooling jacket, cools the inner tube 107, and is then discharged from the cooling water outlet 103'. The distilled water discharged from the outlet 103' is returned to the reservoir 4 via the pipe 7 (FIG. 1).

As described in detail above, the present invention is provided with a heat exchanger and a reservoir, and the distilled water for cooling stored in the reservoir is pumped by a single pump means. Cooling is pumped to multiple laser light sources at the same time! This is a characteristic feature.

bf, a heat exchanger, a reservoir,
In addition, the structure is simplified because the pop means is shared.
j, s device can be constructed compactly.

By sharing the cooling system for each unit, the number of component parts can be reduced, and the cost of the equipment can be significantly reduced.

Furthermore, in the gas laser resonator used in the device of the present invention,
An inner tube holder and an outer tube holder made of "golden wood" which is insoluble in distilled water are fixed to both ends of the discharge tube, and the inner tube and outer tube holder are fixed to each end of the discharge tube.
A cooling hole is formed in the gap between the tubes. In addition, highly insulating (A material) is used for the anode boulder fixed to the inner tube -1-.

Therefore, when cooling the resonator, <
f: There is no need to worry about ion melting, and electrical safety is maintained even when used in a cooling system shared with a YAG laser.

In the present invention, there is one cathode holder and one tube holder.

In addition, since the mirror holders are each constructed separately, it is easy to add materials such as stainless steel or Sejiminox to the cathode holder and the outer tube holder, and the cost can be reduced. In addition, the mirror boulder has a high thermal conductivity (one material can be selectively used as perspiration), and it is tightly fixed to the outer tube holder, which is extremely disadvantageous for cooling the resonator mirror. Become.

It should be noted that the content of the present invention is not limited only to the above embodiments, and many modifications may be made. In a rare case, the flange section provided on the outer tube holder is omitted, the flange section is provided on the inner tube holder, and the mirror boulder is closely fixed to the flange section. Alternatively, the two positive electrodes provided at the center of the inner tube may be composed of one electrode, and each discharge region formed may share the electrode.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of the gas laser resonator shown in FIG. YA, G laser resonator, 2... CO2 laser resonator,; 3 ・Pump, 4 ・IJ-IJ-bar, 5 Heat exchanger, ](month, ](month'...mirror holder, 102,
[12' Gao Duke Holder, 104, "04'
, 106 outer tube, 107...inner 'i'1', 1.4
18, 108'-inner tube holter, 110, 101'-
Resonance 2:・;Mirror, small. In particular, '1 applicant 1-1 infrared rays are missing, (Representative of Association R1 Norihiro Ishi Suenaga

Claims (4)

[Claims] (1) In a laser irradiation device that has multiple working laser light sources with different wavelengths in a single device and irradiates laser light output from the light sources simultaneously or selectively, distilled water for cooling is stored. with a single reservoir and [)′lI
pumping means for transporting the distilled water for cooling stored in the reservoir to each of the laser light sources; and at least a part of the above-mentioned return distilled water is cooled by a roux heat exchanger.
A laser irradiation device characterized by: (2) The laser irradiation device according to item 1iii, item 1, wherein two working laser light sources are provided, one of which is a CO2 laser light source and the other is a YAG laser light source. (3) Store distilled water for cooling in a laser device that simultaneously or selectively irradiates a CO2 laser light source and a YAG laser light source with the laser light output from the 4+R light source in a single device. No single riser...
and a single pump means for pumping the distilled water stored in the IJ-tl bar to the above-mentioned IJ-tl bar, the distilled water being cooled to the above-mentioned IJ-tl bar. is the above-mentioned
- At least a part of the returned distilled water is cooled by a single heat exchanger, and the CO2 laser beam # is coaxially Dust in the resonator configured as a heavy pipe, 2 above.
An inner tube holder and an outer tube holder consisting of a tube insoluble in distilled water are fixed to both ends of the double tube, and a cooling tube A and shoes made of a gap between the double tubes are inserted, and both the holders are attached to the I side. 1. A laser irradiation device characterized in that a mirror holder equipped with a resonator mirror is fixed to a portion thereof. (4) In the apparatus according to item 3 above, the % of the above:
]. 4. A laser irradiation device characterized in that the tube holder and the outer tube holder are made of stainless steel. is thermally coupled to a mirror holder.