CN220324912U - Hundred picoseconds laser capable of compensating light spot under high repetition frequency - Google Patents
Hundred picoseconds laser capable of compensating light spot under high repetition frequency Download PDFInfo
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- CN220324912U CN220324912U CN202321615535.0U CN202321615535U CN220324912U CN 220324912 U CN220324912 U CN 220324912U CN 202321615535 U CN202321615535 U CN 202321615535U CN 220324912 U CN220324912 U CN 220324912U
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- 239000013078 crystal Substances 0.000 claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 4
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000049 pigment Substances 0.000 description 3
- 208000002874 Acne Vulgaris Diseases 0.000 description 1
- 206010051246 Photodermatosis Diseases 0.000 description 1
- 206010000496 acne Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008845 photoaging Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Abstract
The utility model relates to a hundred picosecond laser capable of compensating light spots under high repetition frequency, which comprises the following components: the device comprises a seed source, an amplifying crystal, a driver, a reflecting mirror, a compensating lens and a light guide arm transmission system; the seed source is capable of generating a laser; the laser generated by the seed source is amplified by the amplifying crystal; the laser amplified by the amplifying crystal is reflected to the light guide arm transmission system through the reflecting mirror; the compensating lens is driven by the driver and can be connected into or separated from an optical path between the amplifying crystal and the light guide arm transmission system. The hundred picosecond laser capable of compensating the light spot under the high repetition frequency can effectively solve the problem that the light spot size is suddenly reduced under the high repetition frequency due to the influence of a thermal lens effect. The diameter of the actual light spot output of the laser is ensured to be consistent with the diameter of the set light spot, the energy density is consistent, and the accurate energy control can ensure safer and more efficient clinical application.
Description
Technical Field
The utility model belongs to the technical field of lasers, and particularly relates to a hundred picoseconds laser capable of compensating light spots under high repetition frequency.
Background
Since 2012 the picosecond laser was approved by the FDA for tattoo removal and benign pigment lesion treatment, more and more studies have shown that the picosecond laser is more advantageous in removing tattoo pigment and has fewer side effects. In recent years, with the development of cosmetic medicine, picosecond lasers have also been used in exogenous and endogenous pigment removal, acne scar treatment, photoaging improvement, wrinkle removal, and the like.
The frequency of the hundred picosecond laser for medical use is generally 1-10Hz, and the current technical route mainly comprises three steps, namely, nanosecond laser generated by a seed source laser is amplified and finally enters an SBS medium pool to realize compression, the compressed laser is amplified again, and finally picosecond laser is output. And secondly, a seed source with a hundred picosecond pulse width is preferentially generated, the pulse width is generally 300ps-500ps, the energy is 200uJ, and then the high-energy hundred picosecond laser output is realized through three-pass amplification. The third is clipping method, which generates nanosecond Q-switched pulse with large energy, and narrows the pulse width of laser by clipping front and back pulse width, but also loses part of energy. However, no matter what way, the hundred picosecond laser device is produced, when the frequency is greater than 5Hz, the thermal lens effect produced by large energy output is serious, and when laser light passes through the light guide arm and acts on a human body, the light spot can be drastically reduced, for example, the light guide arm is provided with the light spot of 10mm, and the actual light spot is only 5mm. The energy output is fixed, the light spot is reduced by one time, the energy density is different by 4 times, and the clinical application is greatly influenced. This phenomenon does not occur at low repetition frequencies (less than 5 Hz).
Disclosure of Invention
The utility model aims to solve the technical problems that: the hundred picosecond laser can effectively solve the problem of spot size consistency under different frequencies.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows: a hundred picosecond laser capable of compensating for a spot at high repetition frequencies, comprising: the device comprises a seed source, an amplifying crystal, a driver, a reflecting mirror, a compensating lens and a light guide arm transmission system;
the seed source can generate laser with pulse width of 300ps, repetition frequency of 1-10Hz, energy of 200uJ and wavelength of 1064 nm; the laser generated by the seed source is amplified into laser with energy of 500mJ and wavelength of 1064nm through the amplifying crystal; the laser amplified by the amplifying crystal is reflected to the light guide arm transmission system through the reflecting mirror;
the compensating lens is driven by the driver and can be connected to and separated from the optical path between the amplifying crystal and the reflecting mirror.
The scheme is further improved as follows: the compensating lens is a plano-concave lens with the diameter of 25.4mm and the focal length f= -1000 mm; the compensating lens is plated with a 1064nm antireflection film.
The scheme is further improved as follows: the amplifying crystal comprises a xenon lamp and two Nd-YAG crystals, and a three-way amplifying structure is formed by combining a plurality of lenses.
The scheme is further improved as follows: the reflector is a 45-degree reflector.
The scheme is further improved as follows: the driver is controlled by the control system, when the working frequency of the hundred picosecond laser is 1-5Hz, the control system controls the driver to drive the compensation lens to leave the light path between the amplifying crystal and the reflecting mirror, and when the working frequency of the hundred picosecond laser is 6-10Hz, the control system controls the driver to drive the compensation lens to be connected into the light path between the amplifying crystal and the reflecting mirror.
The scheme is further improved as follows: the driver is a stepper motor.
The hundred picosecond laser capable of compensating the light spot under the high repetition frequency can effectively solve the problem that the light spot size is suddenly reduced under the high repetition frequency due to the influence of a thermal lens effect. The diameter of the actual light spot output of the laser is ensured to be consistent with the diameter of the set light spot, the energy density is consistent, and the accurate energy control can ensure safer and more efficient clinical application.
Drawings
The utility model is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a preferred embodiment of the present utility model.
Detailed Description
The hundred picosecond laser capable of compensating for a light spot at a high repetition frequency of the present embodiment, as shown in fig. 1, includes: a seed source 1, an amplifying crystal 2, a driver 3, a 45 degree mirror 4, a compensation lens 5 and a light guiding arm transmission system 7.
The seed source 1 can generate laser with pulse width of 300ps, repetition frequency of 1-10Hz, energy of 200uJ and wavelength of 1064 nm; the laser generated by the seed source 1 is amplified into laser with energy of 500mJ and wavelength of 1064nm by the amplifying crystal 2; the laser amplified by the amplifying crystal 2 is reflected to the light guide arm transmission system 7 by the 45-degree reflecting mirror 4, and then is output to the target position by the light guide arm transmission system 7.
The compensation lens 5 is driven by the actuator 3, and the actuator 3 is controlled by the control system 6. The driver 3 is able to drive the compensation lens 5 in and out of the optical path between the amplifying crystal 2 and the 45 degree mirror 4.
The amplifying crystal is a traditional three-way amplifying crystal, the structure of the amplifying crystal generally comprises a xenon lamp and two Nd-YAG crystals, and the three-way amplifying structure is formed by combining a plurality of suitable lenses, so that the desired energy output is achieved.
The compensating lens 5 is a plano-concave lens with the diameter of 25.4mm and the focal length f= -1000 mm; since the seed source 1 of the present embodiment generates laser light having a wavelength of 1064nm, the compensation lens 5 is coated with an antireflection film having a wavelength of 1064 nm.
Since the thermal lens effect begins to appear severely after the operating frequency of the hundred picosecond laser exceeds 5Hz, the picosecond laser cannot compensate when the operating frequency is 1 to 5Hz, otherwise the flare is too large and the energy density is insufficient.
The control system 6 reads the working frequency of the hundred picoseconds laser and controls the driver 3 according to the working frequency; when the working frequency of the hundred picosecond laser is 1-5Hz, the control system 6 controls the driver 3 to drive the compensation lens 5 to leave the light path between the amplifying crystal 2 and the 45-degree reflecting mirror 4, and when the working frequency of the hundred picosecond laser is 6-10Hz, the control system 6 controls the driver 3 to drive the compensation lens 5 to enter the light path between the amplifying crystal 2 and the 45-degree reflecting mirror 4.
The actuator may be a stepper motor, a rotary motor, an electromagnetic push rod, an electrically driven hydraulic push rod, etc., as required, by selecting a functional component capable of driving the compensation lens 5 to move between the two positions to be controlled.
The present utility model is not limited to the above-described embodiments. All technical schemes formed by adopting equivalent substitution fall within the protection scope of the utility model.
Claims (6)
1. A hundred picosecond laser capable of compensating for a spot at high repetition frequencies, comprising: the device comprises a seed source, an amplifying crystal, a driver, a reflecting mirror, a compensating lens and a light guide arm transmission system;
the seed source can generate laser with pulse width of 300ps, repetition frequency of 1-10Hz, energy of 200uJ and wavelength of 1064 nm; the laser generated by the seed source is amplified into laser with energy of 500mJ and wavelength of 1064nm through the amplifying crystal; the laser amplified by the amplifying crystal is reflected to the light guide arm transmission system through the reflecting mirror;
the compensating lens is driven by the driver and can be connected to and separated from the optical path between the amplifying crystal and the reflecting mirror.
2. The hundred picosecond laser capable of compensating for a light spot at high repetition frequencies of claim 1, wherein: the compensating lens is a plano-concave lens with the diameter of 25.4mm and the focal length f= -1000 mm; the compensating lens is plated with a 1064nm antireflection film.
3. The hundred picosecond laser capable of compensating for a light spot at high repetition frequencies of claim 1, wherein: the amplifying crystal comprises a xenon lamp and two Nd-YAG crystals, and a three-way amplifying structure is formed by combining a plurality of lenses.
4. The hundred picosecond laser capable of compensating for a light spot at high repetition frequencies of claim 1, wherein: the reflector is a 45-degree reflector.
5. The hundred picosecond laser capable of compensating for a light spot at high repetition frequencies of claim 1, wherein: the driver is controlled by the control system, when the working frequency of the hundred picosecond laser is 1-5Hz, the control system controls the driver to drive the compensation lens to leave the light path between the amplifying crystal and the reflecting mirror, and when the working frequency of the hundred picosecond laser is 6-10Hz, the control system controls the driver to drive the compensation lens to be connected into the light path between the amplifying crystal and the reflecting mirror.
6. The hundred picosecond laser capable of compensating for a light spot at high repetition frequencies of claim 1, wherein: the driver is a stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615535.0U CN220324912U (en) | 2023-06-25 | 2023-06-25 | Hundred picoseconds laser capable of compensating light spot under high repetition frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615535.0U CN220324912U (en) | 2023-06-25 | 2023-06-25 | Hundred picoseconds laser capable of compensating light spot under high repetition frequency |
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| Publication Number | Publication Date |
|---|---|
| CN220324912U true CN220324912U (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321615535.0U Active CN220324912U (en) | 2023-06-25 | 2023-06-25 | Hundred picoseconds laser capable of compensating light spot under high repetition frequency |
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| Country | Link |
|---|---|
| CN (1) | CN220324912U (en) |
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2023
- 2023-06-25 CN CN202321615535.0U patent/CN220324912U/en active Active
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