JPS5886786A - Laser device - Google Patents

Abstract

PURPOSE:To enhance the safety of a medical laser device which breaks and cures diseased part of a living body by receiving at least part of a laser light emitted from laser generating means, measuring the light output, and comparing the level of the obtained measured signal with the predetermined value. CONSTITUTION:An output controller 4 and a cooler 6 are connected to a power source 2, an exciting pump 8 is arranged between the cooler 6 and the controller 4, a lamp 8 is cooled with the coolant from the cooler 6, and the cooler 6 is connected directly to the controller 4. Then, a laser generator 10 is arranged along the lamp 8 between resonance mirrors 14a, 14b disposed at both ends, the light output 11 of the laser emitted from th generator 10 is controlled by opening or closing a shutter 12 provided in the controller 4, and part of the output 11 is measured by a laser output measuring unit 16 which is formed of a photoelectric converter. Subsequently, the level of the measured signal is compared with a set value, the controller 4 is controlled with an output setting volume 20, a foot switch 22, thereby suppressing the excessive output and displaying in on an indicator 24.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser device, and more particularly to a medical laser device for destructively treating a lesion in a living body using optical energy.

In medical laser equipment, a high degree of safety is required because the object to which high-energy laser light is irradiated is mainly the human body, and the laser glove is directly operated by the operator such as a doctor. . According to conventional medical laser devices, in order to achieve the above-mentioned safety, the current value of the excitation lamp corresponding to the laser light output is measured, and the laser output is controlled based on this current measurement value. There is. That is, when the radar output becomes excessive, the above-mentioned electric current value also increases and exceeds the predetermined current value, and it is detected that an excessive output has occurred in the laser beam, and at this time, the radar output is is configured to stop. However, the above configuration has disadvantages in that the rung current detection circuit is complicated and the reliability of its operation is low. Furthermore, taking into account the variation errors of individual pump rungs, the actual maximum allowable output level at which laser emission should be stopped must be set higher than the theoretical value, resulting in excessive output of the radar light. The risk of death has increased and there have been major safety issues.

The present invention has been made in view of the above circumstances, and its purpose is to provide a laser device that is simple in construction, highly reliable in operation, and highly safe.

An embodiment of the present invention will be described below with reference to the drawings. - FIG. 1 shows the overall configuration of an embodiment of the present invention. Reference numeral 2 indicates a power supply section. The power supply section 2 is an output control device f.
4 and a cooler 6. This cooler 6 is coupled to the excitation run f8 and is also connected to the output control device 6. The excitation rung 8 is configured to be cooled by cooling water supplied from the cooler 6. A laser generating section 10 is provided adjacent to the excitation rung 8,
Laser light 11 emitted from this laser generator 1o
is the shaft 1 provided in the output control device 4.
2 is open, resonance occurs between the resonant mirrors 14* and 14b and is transmitted to the outside. Further, a laser output measuring section 16 consisting of, for example, a photoelectric converter is provided so as to face the radar generating section 10 via a resonant mirror 14b. This laser output measuring section 16 is connected to the resonant mirror 1.
It receives at least a portion of the laser beam output from the radar generator 10 via the radar generator 4b, measures the output of the laser beam, and supplies a measurement signal to the output control device 4.

Note that the output control device 4 includes an output setting ♂ium 20. centre,
A toy, a chi 22 and a display device 24 are connected.

FIG. 12 shows the internal configuration of the output control device @4. Reference numeral 28 is an interface circuit, and a memory 32 is connected to this interface circuit 28 via a CPU software.

The interface circuit 28 is connected to the shutter 12, and is also connected to the laser output measuring section 16 shown in FIG. 1 via a converter 34. Further, the interface circuit 28 connects the power supply unit 2. Cooler 6. f,) is connected to the switch 22 and the display device fji124. Current control circuit 38
is connected to the output setting zolium 20 and the interface circuit 28, and is also connected via a relay 40 to the excitation run f8 shown in FIG.

The operation of an embodiment of the present invention configured as described above will be explained with reference to the flowchart shown in FIG. In FIG. 1, when the operator closes the F, TOS, and CH 22, the CPU J O of the output control device 4 (FIG. 2)
executes a laser beam emission function according to the flowchart of FIG. In this situation, the CPU 30 first checks the status of the cooler 6 and the shaft 12.

If the conditions are satisfied, the laser beam is emitted from the laser generator 10. Next, the CPU s o checks the output state of the laser beam. That is, in this embodiment, the measurement signal 18 transmitted from the radar output measurement section 16 consisting of a photoelectric converter is converted into digital information by the converter 34, and is inputted to the CPU JO via the interface circuit 28. Ru. At this time, the CPU
compares the maximum permissible power level previously stored in the memory 32 with the actual laser power level represented by the digital information of the measurement signal 18. When the radar light is overpowered, the actual radar output level increases.

When this laser output level exceeds the maximum allowable output level, the CPU 30 determines that the output is excessive and issues a laser emission prohibition command to the interface circuit 28. In response to this laser emission prohibition command, the interface circuit 28 closes the shutter 12, opens the contact 42 of the relay 40, and closes the excitation lamp "8".
Turn off the light. On the other hand, if the CPU SO determines that the output is not excessive, the radar light emission from the radar generating section 10 is continued until the shift foot switch 22 is opened by the operator.

Then, when the operator opens the F, Tosui, and Ji 22, the CPU
jO outputs a laser beam emission stop command. In this case, only the shutter 12 is closed in response to the stop command, and the current supplied to the excitation rung 8 is not cut off, so the excitation rung 8 continues its lighting operation. Therefore, the laser beam generated from the laser generator gIO is prohibited from being transmitted to the outside, such as the human body, by the closed shutter 12.

According to the above-described embodiment of the present invention, a laser output measuring section 16 is provided which directly receives at least a part of this laser light and measures the laser light output while the laser generating section 10 is operating. ing. This laser output measuring section 16°VD controller 34. Interface circuit z 8 , CPU 30 , memory 32 and relay 4
0 forms a laser light output stop circuit.

Therefore, compared to the conventional method of indirectly measuring the laser light output by measuring the current value of the excitation lamp, higher reliability can be achieved and the configuration can be simplified. Furthermore, a CPU 30 is provided in the output control device 4,
The actual laser beam output indicated by the measurement signal 18 from the measuring section 16 is compared with a predetermined maximum allowable output level, and the operation of the laser generating section 10 is immediately stopped when excessive output of the laser beam occurs. It is configured as follows. Therefore, it is possible to accurately prevent excessive laser light from being irradiated onto the human body, etc., regardless of the fluctuation error of the excitation rung 8, and safety can be further improved.

Next, other embodiments of the present invention will be described.

In FIG. 4, components that are the same as those already shown in FIG. 3 are given the same reference numerals and their explanations will be omitted. Fourth
The output control device of the embodiment shown in the figure is further provided with a converter 44 and a reference voltage source 46. That is,
One input terminal (@l input terminal) of the converter delta converter 44 is connected to the ψ converter 34, and the other input terminal (@20
The input terminal) is connected to the positive terminal of the reference voltage source 46. The negative terminal of the cough reference voltage source 46 is grounded.

Additionally, the output end of the connector 44 is connected to the relay 40. According to such a configuration, the measurement signal 28 from the laser output measurement section 16 is analog information! 1 is compared with the reference voltage v8 by the converter 44.

Therefore, the laser light output stop circuit operates as the laser output measuring section 16. Converter 44. Since it is formed by the reference voltage source 46 and the relay 40, the configuration of the device can be further simplified. In addition, in this embodiment, the CPU s
o is provided mainly for controlling a display device and other safety devices (not shown).

It should be noted that the present invention is not limited to the embodiments described above, and of course may be modified within the scope of the present invention.

As described above, according to the present invention, there is provided a measuring means for receiving at least a part of the laser light emitted from the laser generating means, measuring the laser light output, and outputting a measurement signal corresponding to this output, The laser is configured to detect excessive output of the laser beam by comparing the level of the measurement signal with a predetermined value, which simplifies the configuration and provides highly reliable and safe operation. equipment can be provided.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of a laser device which is an embodiment of the present invention, and Fig. 2 shows the internal configuration of the running power control device shown in Fig. 1! Lock diagram, Figure 3 is shown in Figure 2, 90PU
FIG. 4 is an overall configuration diagram of a laser device according to another embodiment of the present invention. 2... Power source section, 4-- Output control device, 6... Cooler, 8... Excitation lamp, 10- Laser generating section, 12-
... Shadata, 14 m, 14 b = Resonance mirror, 16... Laser output measuring section, 22-, Fu, Tosui, Chi, 28- Interface circuit, 30... CPU
,! ,? -Memory, 34-, converter, 40...
IJL/-144-Axis Conno 9 Rator. jllll Figure 2 Figure 2 - Two outputs 1 Fixed blindness n6 Figure 3 Figure 4 Figure 8 Procedural Amendment User 57.R.288 Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Patent Application for Indication of Case 56-184832 No. 2, Name of the invention Laser device 3, Relationship with the person making the amendment Patent applicant (037) Orin i4 Moto Gaku Kogyo Co., Ltd. 4, Agent 5, Spontaneous amendment 7, Contents of amendment 111, , page 4, line 5, C of the specification attached to the application.
: Correct "output control device 6" to "output control device 4." (2) Same, page 9, line 4, C = "Figure 3" is corrected to "Figure 2."

Claims (1)

[Claims] 1. A radar generating means for generating a laser beam, and a method for measuring the output level of the laser beam by receiving at least a part of the laser beam emitted from the laser generating means. a measuring means for outputting a measuring signal corresponding to an output mechanism; and a measuring means connected to the measuring means to stop the radiation of the radar light from the radar generating means when the value of the measuring signal exceeds a predetermined value. 1. A laser device comprising: means for stopping laser output. 2. The scope of claim 1, characterized in that the radar output stopping means includes a micro sensor that operates according to a predetermined sequential control routine.
The laser device according to item 1. 3. The laser output stopping means is characterized in that it includes a reference voltage source and a converter that compares the reference voltage of the reference voltage source and the measurement signal supplied from the measurement means. A laser device according to claim 1. 4. The laser device according to any one of claims 1 to 3, wherein the radar output stopping means is provided within an output control device.