CN109157756A - A kind of double-pulse laser output control method of Q-switch laser therapy apparatus - Google Patents
A kind of double-pulse laser output control method of Q-switch laser therapy apparatus Download PDFInfo
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- CN109157756A CN109157756A CN201711038100.3A CN201711038100A CN109157756A CN 109157756 A CN109157756 A CN 109157756A CN 201711038100 A CN201711038100 A CN 201711038100A CN 109157756 A CN109157756 A CN 109157756A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/0613—Apparatus adapted for a specific treatment
- A61N5/0616—Skin treatment other than tanning
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/067—Radiation therapy using light using laser light
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract
The present invention relates to a kind of double-pulse laser output control methods of Q-switch laser therapy apparatus, there is following steps: 1), high voltage power supply charges to charging to storage capacitor terminates；2), when failing edge of the system detection to flashlamp discharge signal pulse, meeting trigger switch discharge circuit is opened, and xenon lamp starts to discharge；3), when flashlamp discharge electric current rises near maximum value, system generates Q line lock trigger signal, when system detection is to first Q line lock trigger signal pulse failing edge, triggers electro-optic crystal for the first time after system delay t4；4), waiting delay t2, system detection to second Q line lock trigger signal pulse failing edge are delayed after t4, second of triggering electro-optic crystal within a pumping cycle.Strong antijamming capability of the present invention, improves system reliability；Laser exports energy up to erg-ten magnitude；Double-pulse laser interval time is adjustable.
Description
Technical field
The present invention relates to a kind of double-pulse laser output control methods of Q-switch laser therapy apparatus, and in particular to a kind of Nd:
The double-pulse laser output control method of YAG Q-switch laser therapy apparatus.
Background technique
In medical laser field, Nd:YAG Q-switch laser therapy apparatus is mostly exported with single-pulse laser, and laser pulse width is general
In 5nS -10nS, laser output energy is generally several hundred mJ, limited for some serious treating skin disease effects；If not
Under the premise of changing laser pulse width, laser energy is promoted to 1J magnitude, can most be had to some serious illnesss
The treatment of effect improves therapeutic effect.
In dynamic holographic detection field, quick events development process is observed continuously in order to realize, then requires dipulse
Laser output laser is as Active Imaging light source.1uS-is divided between the double-pulse laser that this imaging technique usually requires that
Between 1000uS, by two pulsing lights at musec order interval shoot come two holograms be stacked in same Zhang Quan
It ceases on bottom plate, any temporary disturbance of testee can be all apparent in the interference fringe of double excitation pulse hologram, because
And obtain the multidate information of testee.
Summary of the invention
1, anti-interference the object of the present invention is to provide a kind of double-pulse laser output control method of Q-switch laser therapy apparatus
Ability is strong, improves system reliability；Laser exports energy up to erg-ten magnitude；Double-pulse laser interval time is adjustable.
In order to achieve the above object, the present invention has following technical solution:
A kind of double-pulse laser output control method of Q-switch laser therapy apparatus of the invention, there is following steps:
1), high voltage power supply charges to charging to storage capacitor and terminates；
2), when failing edge of the system detection to flashlamp discharge signal pulse, meeting trigger switch discharge circuit is opened, xenon lamp
Start to discharge；
3), when flashlamp discharge electric current rises near maximum value, system generates Q line lock trigger signal, works as system detection
When to first Q line lock trigger signal pulse failing edge, electro-optic crystal is triggered for the first time after system delay t4；
4), waiting delay t2, system detection to second Q line lock trigger signal pulse failing edge are delayed after t4,
Second of triggering electro-optic crystal in one pumping cycle；
In order to avoid there is other pulses or subpulse, t2 setting cannot be less than the nominal parameters of Q power supply；Time t5 is set
Not less than time t7 and it is no more than the sum of time t7 and time t8.
Wherein, the t2 is the time interval that two Q line lock trigger signals are generated in a pumping cycle, when t2 is got over
When close to Q power supply nominal shutdown recovery time, it is bigger that laser exports energy；The t4 is first Q line lock triggering letter
It feels the pulse the failing edge of punching and the delay time of first trigger point.
Wherein, the setting time t5 is flashlamp discharge signal failing edge and first trigger point interval time；When described
Between t7 be on flashlamp discharge electric current from 0 rise to maximum the time required to；Time t8 is the flashlamp discharge maximum current duration.
Due to taking above technical scheme, the present invention has the advantages that
1 flashlamp discharge signal control circuit, Q line lock trigger signal control circuit devise optical coupling isolation circuit,
Strong antijamming capability improves system reliability.
2 laser output energy of the invention are up to erg-ten magnitude.
3 double-pulse laser interval times of the invention are adjustable.
Detailed description of the invention
Fig. 1 is the block diagram of the working principle of the invention.
Fig. 2 is the schematic diagram of each pulse signal of the invention.
Wherein:
T1:Q line lock trigger signal the low level duration；
The time interval of two Q line lock trigger signals is generated in t2: one pumping cycle；
T3: flashlamp discharge signal the low level duration；
The delay time of t4: the first Q line lock trigger signal failing edge and first trigger point；
T5: flashlamp discharge signal failing edge and first trigger point interval time；
The interval time of t6: the first trigger point and second trigger point；
T7: maximum required time is risen to from 0 on flashlamp discharge electric current；
T8: flashlamp discharge maximum current duration；
Specific embodiment
Referring to Fig. 1, Fig. 2, a kind of double-pulse laser output control method of Q-switch laser therapy apparatus of the invention has following
Step:
1), high voltage power supply charges to charging to storage capacitor and terminates；
2), when failing edge of the system detection to flashlamp discharge signal pulse, meeting trigger switch discharge circuit is opened, xenon lamp
Start to discharge；
3), when flashlamp discharge electric current rises near maximum value, system generates Q line lock trigger signal, works as system detection
When to first Q line lock trigger signal pulse failing edge, electro-optic crystal is triggered for the first time after system delay t4；
4), waiting delay t2, system detection to second Q line lock trigger signal pulse failing edge are delayed after t4,
Second of triggering electro-optic crystal in one pumping cycle；
In order to avoid there is other pulses or subpulse, t2 setting cannot be less than the nominal parameters of Q power supply；Time t5 is set
Not less than time t7 and it is no more than the sum of time t7 and time t8.
The t2 is the time interval that two Q line lock trigger signals are generated in a pumping cycle, when t2 is closer to Q
When power supply nominal shutdown recovery time, it is bigger that laser exports energy；The t4 is first Q line lock trigger signal pulse
Failing edge and first trigger point delay time.
The setting time t5 is flashlamp discharge signal failing edge and first trigger point interval time；The time t7 is
Maximum required time is risen to from 0 on flashlamp discharge electric current；Time t8 is the flashlamp discharge maximum current duration.
The present invention includes flashlamp discharge signal control circuit, Q line lock trigger signal control circuit；The Q power supply
Characteristic be to move back pressure type, repetition rate is adjustable, and crystalline substance pressure is continuously adjustable, and high-voltage pulse trigger signal and adjusts Q defeated along being less than 10.0nS
Delay between out is continuously adjustable, and shutdown resume speed is fast.The flashlamp discharge signal, Q line lock trigger signal are by being
Control circuit of uniting generates, and flashlamp discharge signal controls the electric discharge of xenon lamp, and the high pressure that Q line lock trigger signal controls Q power supply is defeated
Out.Present invention can be implemented in start electro-optic crystal twice in a pumping cycle.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.Here all embodiments can not be exhaustive.It is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (3)
1. a kind of double-pulse laser output control method of Nd:YAG Q-switch laser therapy apparatus, it is characterised in that there is following steps:
1), high voltage power supply charges to charging to storage capacitor and terminates；
2), when failing edge of the system detection to flashlamp discharge signal pulse, meeting trigger switch discharge circuit is opened, and xenon lamp starts
Electric discharge；
3), when flashlamp discharge electric current rises near maximum value, system generates Q line lock trigger signal, when system detection to the
When one Q line lock trigger signal pulse failing edge, electro-optic crystal is triggered for the first time after system delay t4；
4), waiting delay t2, system detection to second Q line lock trigger signal pulse failing edge are delayed after t4, at one
Second of triggering electro-optic crystal in pumping cycle；
In order to avoid there is other pulses or subpulse, t2 setting cannot be less than the nominal parameters of Q power supply；It is not small that time t5 is set
In time t7 and it is no more than the sum of time t7 and time t 8.
2. a kind of double-pulse laser output control method of Nd:YAG Q-switch laser therapy apparatus according to claim 1, special
Sign is: the t2 is the time interval that two Q line lock trigger signals are generated in a pumping cycle, when t2 is closer to Q
When power supply nominal shutdown recovery time, it is bigger that laser exports energy；The t4 is first Q line lock trigger signal pulse
Failing edge and first trigger point delay time.
3. a kind of double-pulse laser output control method of Nd:YAG Q-switch laser therapy apparatus according to claim 1, special
Sign is: the setting time t5 is flashlamp discharge signal failing edge and first trigger point interval time；The time t7 is
Maximum required time is risen to from 0 on flashlamp discharge electric current；Time t8 is the flashlamp discharge maximum current duration.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711038100.3A CN109157756B (en) | 2017-10-30 | 2017-10-30 | Double-pulse laser output control method of Q-switched laser therapy apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711038100.3A CN109157756B (en) | 2017-10-30 | 2017-10-30 | Double-pulse laser output control method of Q-switched laser therapy apparatus |
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| CN109157756A true CN109157756A (en) | 2019-01-08 |
| CN109157756B CN109157756B (en) | 2020-12-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354904A (en) * | 2011-01-28 | 2012-02-15 | 中国科学院福建物质结构研究所 | Double-pulse lamp pump solid laser |
| CN103036145A (en) * | 2011-09-30 | 2013-04-10 | 上海华魏光纤传感技术有限公司 | Multi-narrow-pulse laser light source and achieving method thereof |
| CN104849244A (en) * | 2015-05-28 | 2015-08-19 | 中国科学技术大学 | Multi-pulse laser-induced breakdown spectroscopy measuring method and system |
| DE102016212928B3 (en) * | 2016-07-14 | 2017-09-07 | Trumpf Laser Gmbh | Method for generating a laser pulse and arrangement for generating a driver drive signal |
-
2017
- 2017-10-30 CN CN201711038100.3A patent/CN109157756B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354904A (en) * | 2011-01-28 | 2012-02-15 | 中国科学院福建物质结构研究所 | Double-pulse lamp pump solid laser |
| CN103036145A (en) * | 2011-09-30 | 2013-04-10 | 上海华魏光纤传感技术有限公司 | Multi-narrow-pulse laser light source and achieving method thereof |
| CN104849244A (en) * | 2015-05-28 | 2015-08-19 | 中国科学技术大学 | Multi-pulse laser-induced breakdown spectroscopy measuring method and system |
| DE102016212928B3 (en) * | 2016-07-14 | 2017-09-07 | Trumpf Laser Gmbh | Method for generating a laser pulse and arrangement for generating a driver drive signal |
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