CN117918949A - Treatment dosage control system and adjustment method for picosecond laser beauty instrument - Google Patents

Abstract

The invention provides a treatment dosage control system and an adjustment method of a picosecond laser beauty instrument. The control system comprises a seed source, an isolation module, a beam expansion collimation module, an LD array side pumping multistage amplification module, a beam expansion module, a frequency multiplication module and a treatment output module which are sequentially connected, wherein the output end of the seed source is further connected with the input end of a collection module, the output end of the collection module is connected with the input end of a control module, the output end of the control module is respectively connected with the seed source and the input end of the LD array side pumping multistage amplification module, and the output end of the LD array side pumping multistage amplification module is further connected with the input end of the collection module. The invention adopts the energy closed-loop feedback method to realize the real-time monitoring and control of the energy of the seed light and the amplified light, which is not only helpful to make up the defect of low utilization rate of the pumping energy of the xenon lamp, but also can accurately regulate and control the energy of the seed light in real time, thereby realizing the accurate control of the energy of the therapeutic light beam.

Description

Treatment dosage control system and adjustment method for picosecond laser beauty instrument

Technical Field

The invention relates to the technical field of laser dosage adjustment, in particular to a treatment dosage control system and an adjustment method of a picosecond laser beauty instrument.

Background

The treatment of picosecond laser beauty treatment instrument mainly relies on laser with narrow pulse width and high peak power to ensure that the picosecond laser beauty treatment instrument reaches high energy density in a short time and rapidly acts on the body part to be treated, and becomes one of the latest technologies of laser beauty treatment.

However, the picosecond laser beauty instrument can effectively treat the pigment picosecond diseases and remove tattoos only through proper treatment dosage, and if the dosage is insufficient, the treatment effect cannot be achieved, so that the cost of a patient is increased, and the experience of customers is reduced; if the dosage is too large, the skin and second mucous membrane tissues of the patient are damaged, pain and swelling occur, the symptoms are particularly serious, and scar tissues can be left on the skin and second surfaces. Thus, achieving accurate control of the therapeutic dose of the picosecond laser cosmetic instrument may better serve the patient.

The therapeutic dose of the picosecond laser beauty instrument is measured by the energy density of the laser, and the energy density is determined by the energy of the output laser and the spot area. The common laser energy regulation and control of the picosecond laser beauty instrument in the market at present mainly comprises seed light injection and crystal multistage amplification, and the energy amplification of the picosecond laser is realized by a passive Q-switching technology and a MOPA amplification technology of inserting a saturable absorber into a light path. The area of the output light spot is mainly controlled by the lens group of the laser handle. Because the frequency and wavelength of the therapeutic light beam are switched, the thermal lens effect of the crystal, the mechanical structure and other factors can cause the problems of energy fluctuation and light spot deformation in practical application, the existing picosecond laser beauty instrument cannot accurately control the therapeutic dosage, and is unfavorable for the treatment of patients.

Disclosure of Invention

Based on the above, it is necessary to provide a therapeutic dose control system and an adjustment method for a picosecond laser beauty instrument, which solve the problem that the conventional picosecond laser beauty instrument is not easy to accurately control the energy density of the picosecond laser.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The treatment dosage control system of the picosecond laser beauty instrument comprises a seed source, an isolation module, a beam expansion collimation module, an LD array side pumping multistage amplification module, a beam expansion module, a frequency multiplication module and a treatment output module which are sequentially connected, wherein the output end of the seed source is also connected with the input end of a collection module, the output end of the collection module is connected with the input end of a control module, the output end of the control module is respectively connected with the seed source and the input end of the LD array side pumping multistage amplification module, and the output end of the LD array side pumping multistage amplification module is also connected with the input end of the collection module;

The seed light of the seed source is output in a laser pulse form, and after being split by the collecting module, a main beam and a secondary beam are formed, the control module receives the secondary beam which is fed back by the collecting module and expressed in an electric signal form, and regulates and controls the energy state of the seed source to form an energy closed loop of the seed source;

The main beam enters the LD array side pumping multistage amplifying module through the beam expanding collimation module, is split again by the collecting module after energy amplification, and the control module receives the split secondary beam expressed in the form of an electric signal and fed back by the collecting module and regulates the LD array side pumping multistage amplifying module to form an energy closed loop for regulating the main beam; the main beam after light splitting passes through a beam expanding module and a frequency doubling module and is output by a treatment output module for treatment.

Further, the LD array side pumping multistage amplification module comprises two pumping units and crystal rods which are arranged side by side; the pumping unit comprises three LD arrays which are uniformly distributed on the periphery of the crystal rod.

Further, the treatment output module comprises a laser handle; the laser handle comprises a handle shell, a first lens, a second lens and a piezoelectric nano translation stage; the first lens is fixedly arranged on the handle shell, and the second lens is loaded on the piezoelectric nano translation stage; the piezoelectric nano translation stage is movably arranged on the handle shell, controls the one-dimensional movement of the second lens and is used for changing the distance between the second lens and the first lens to accurately adjust the size of the therapeutic light spot.

Further, the treatment output module further comprises a light guide arm, and two ends of the light guide arm are respectively connected with the frequency doubling module and the laser handle and used for reflecting the laser beam output by the frequency doubling module into the handle shell.

Further, the collecting module comprises two groups of polarization spectroscopes, a light beam collecting mirror and photoelectric detectors which are sequentially arranged, and a signal conditioning unit which is respectively and electrically connected with the two photoelectric detectors; the signal conditioning unit is electrically connected with the control module and is used for converting the collected light beam information into an electric signal and transmitting the electric signal to the control module.

Further, the detection wavelength range of the photodetector is 500nm to 1100nm.

Further, the frequency multiplication module is composed of a frequency multiplication crystal and a 1064nm narrow-band filter and is used for ensuring that only a pulse laser beam with the wavelength of 532nm is output.

Further, the seed source is composed of a pumping source and a bonding crystal; the pump source is an optical fiber coupling LD laser, and the bonding crystal is a laser medium Nd: YAG crystal and saturable absorber Cr4+: YAG bonding.

The invention also relates to a laser treatment energy adjustment method, which is applied to a picosecond laser beauty instrument, wherein the picosecond laser beauty instrument is provided with a laser and a controller, the laser is used for emitting seed light for treatment, the controller monitors according to collected beam energy data, adjusts the laser when the incidence requirement of the LD array side pumping multistage amplification module is not met, and adjusts the LD array side pumping multistage amplification module when the amplification requirement is not met so as to control the laser treatment energy output by the picosecond laser beauty instrument; the laser treatment dose control method comprises the following steps:

Acquiring secondary beam energy data of a main beam and a secondary beam generated after seed light is split according to a preset beam splitting proportion in real time, and generating second secondary beam energy data of a second main beam and a second secondary beam after the main beam is amplified and split according to the same beam splitting proportion;

Comparing the two secondary beam energy data with a preset theoretical reference value after being processed according to corresponding amplification proportion, and judging whether the second main beam energy data reaches a preset target amplified energy or not;

Otherwise, the controller adjusts the seed light emitted by the laser and the LD array side pumping multistage amplifying module until the second-time beam energy data reaches target amplifying energy after amplifying treatment, and then guides the frequency multiplication light of the second main beam to be output as laser treatment energy after coupling the frequency multiplication light, so as to finish laser treatment energy adjustment.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the energy state of the seed light can be obtained by adding the collecting module on the basis of the seed source, and the energy value of the seed light is monitored and regulated in real time by matching with the control module, so that the energy closed loop of the seed source is realized, and the accurate and flexible regulation and control of the energy of the seed light are facilitated;

2. According to the invention, the LD array side pumping multistage amplifying module amplifies the energy of the light beam, the energy state of the amplified light obtained by the collecting module is increased, the energy value of the amplified light is monitored and regulated in real time by the control module, so that the energy closed loop of the LD array side pumping multistage amplifying module is realized, the defect of low energy utilization rate of xenon lamp pumping is overcome, the energy of the amplified light can be accurately regulated and controlled in real time, and the accurate control of the energy of the therapeutic light beam is realized;

3. The treatment output module uses the high-precision piezoelectric nano translation stage to control the one-dimensional movement of the second lens to change the distance between the second lens and the first lens, so as to realize the accurate control of the area of the light spot of the treatment beam; the energy density of the therapeutic light beam can be precisely controlled by precisely controlling the energy of the therapeutic light beam and the area of the light spot, so that the therapeutic dosage of the picosecond laser beauty instrument can be precisely controlled.

Drawings

The disclosure of the present invention is described with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. Wherein:

FIG. 1 is a block diagram of a therapeutic dose control system for a picosecond laser cosmetic instrument according to embodiment 1 of the present invention;

FIG. 2 is a schematic diagram showing the distribution of pump units and crystal rods in a side-pumped multistage amplification module based on the LD array of FIG. 1;

FIG. 3 is a schematic view of beam refraction based on the collection module of FIG. 1;

FIG. 4 is a schematic view of a laser handle structure based on the treatment output module of FIG. 1;

FIG. 5 is a schematic view of the beam refraction of the entire treatment dosage control system of the picosecond laser cosmetic instrument;

Fig. 6 is a flowchart of a laser treatment energy adjustment method according to embodiment 2 of the present invention.

The reference numerals in the drawings indicate: 11. a pumping unit; 12. a crystal rod; 21. a handle shell; 22. a first lens; 23. a second lens; 24. a piezoelectric nano translation stage; 31. a polarizing beamsplitter; 32. a beam acquisition mirror; 33. a photodetector; 34. and a signal conditioning unit.

Detailed Description

It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.

Example 1

Referring to fig. 1, the present embodiment describes a treatment dose control system of a picosecond laser beauty treatment instrument, which includes a seed source, a collection module, an isolation module, a control module, a beam expansion and collimation module, an LD array side pumping multistage amplification module, a beam expansion module, a frequency multiplication module and a treatment output module. The specific structure of each module will be described below.

The seed source is composed of a pumping source and a bonding crystal, wherein the pumping source is an optical fiber coupling LD laser, and the bonding crystal is a laser medium Nd: YAG crystal and saturable absorber Cr4+: YAG bonding.

As shown in fig. 3, the collecting module includes a polarization beam splitter 31 (95:5), a beam collecting mirror 32, a photodetector 33, and a signal conditioning unit 34, which are sequentially arranged, and is configured to collect information of the split beam, convert the information into an electrical signal, and transmit the electrical signal to the control module. The polarization spectroscope 31 (95:5), the light beam collecting mirror 32 and the photoelectric detector 33 are two groups, which are connected on the same signal conditioning unit 34. The detection wavelength range of the photodetector 33 is 500nm to 1100nm. The polarization beam splitter 31 may be replaced by a beam splitter or other optical element that can generate a double beam.

The isolation module is mainly composed of a half wave plate, a polaroid and an optical rotator. The angle of the polaroid is 45 degrees, wherein a half wave plate and an optical rotator are respectively arranged in the middle of the 45-degree polaroid, and the half wave plate and the optical rotator can be used for isolating unnecessary return light in the optical fiber coupling LD laser.

The control module is responsible for receiving the feedback signal of the collection module, realizing the real-time monitoring of energy, and can regulate and control the output energy of seed light and amplified light beam respectively according to the feedback signal. Meanwhile, the working state of the seed source is controlled through the feedback signal provided by the collecting module, and when the energy of the amplified light beam is too high, the control module stops the seed source to work, so that uncomfortable treatment on a patient is avoided.

The beam expanding and collimating module consists of a plano-concave lens and a plano-convex lens which are processed by a K9 material, and an inverted Galileo telescopic system is adopted to enable focuses of the two lenses to coincide to expand and collimate seed source beams so as to enable the seed source beams to be matched with crystal apertures of an amplifying stage.

As shown in fig. 2 and 5, the LD array side-pumped multistage amplification module includes a pump unit 11, a crystal rod 12, a quarter-wave plate, a 0 ° total reflection mirror, a polarizing plate, a reflection mirror, and the like. It is emphasized that the crystal rod 12 is Nd: YAG crystal rod, 2 independent pumping units are placed side by side, and every pumping unit of group comprises 3 LD array, and 3 LD array modules are evenly placed in Nd according to 120 °: around the YAG crystal rod. Nd: YAG crystal rods are made of Nd with the size phi 7x100 mm: YAG crystal rod, realize the two-way amplification of primary, second grade, and phi 8x100 mm Nd: YAG crystal rod completes three-stage main amplification. The central wavelength of the pumping light output by the LD array is 808nm, the spectral width is 400 mu m, and the pumping light is matched with the crystal absorption peak, so that the pumping energy loss in the amplifying process can be reduced. The output pump light energy can be directly controlled by an electrical signal.

It should be noted that, in practical application, the LD array may be disposed in five groups and five directions uniformly or in other multi-directional side pumping structures, so long as the effect achieved by the embodiment can be achieved.

The beam expanding module consists of two lenses processed by the K9 material, can expand the amplified light, and is incident on the nonlinear crystal in the frequency doubling module.

The frequency multiplication module is composed of a KDP frequency multiplication crystal and a 1064nm optical filter and is used for ensuring that only pulse laser with the wavelength of 532nm can be output, and the wavelength switching output of the picosecond beauty instrument can be realized through steering engine equipment according to the working requirement. The KDP frequency doubling crystal can be replaced by a DKDP crystal or other crystals with second-order nonlinear effects.

As shown in fig. 4, the therapeutic output module includes a handle housing 21, a first lens 22, a second lens 23, a piezoelectric nano-translation stage 24, a light guiding arm, and the like. The handle shell 21, the first lens 22, the second lens 23 and the piezoelectric nano-translating stage 24 can form a laser handle, and the light guide arm can adopt a 45-degree reflecting mirror light guide arm which reflects upwards. The therapeutic beam is directed from the picosecond laser via a light guide arm and can be applied to the patient's skin by a laser handpiece. A first lens 22 of the laser handle is fixedly arranged on the handle shell 21, and a second lens 23 is loaded on a piezoelectric nano translation stage 24; the piezoelectric nano-translation stage 24 is movably mounted on the handle shell 21, and controls the one-dimensional movement of the second lens 23 to change the distance between the second lens and the first lens 22 so as to adjust the size of the therapeutic light spot.

The beam path is as follows: the seed light of the seed source is output in a laser pulse mode, is split into a main beam and a secondary beam by the collecting module, and the control module receives the secondary beam which is fed back by the collecting module and expressed in an electric signal mode, regulates and controls the energy state of the seed source, so that an energy closed loop of the seed source is formed;

The main beam enters the LD array side pumping multistage amplifying module through the beam expanding collimation module, after energy amplification, the main beam is split into a second main beam and a second sub beam by the collecting module, the control module receives the second sub beam which is fed back by the collecting module and expressed in the form of an electric signal, and regulates the LD array side pumping multistage amplifying module to form an energy closed loop for regulating the main beam; the second main beam passes through the beam expanding module and the frequency doubling module and is output by the treatment output module for treatment.

The existing therapeutic dose control implementation scheme of the picosecond beauty instrument adopts a seed source, an isolation module, a beam expansion collimation module, a xenon lamp pumping amplification module, a beam expansion module, a frequency multiplication module and a therapeutic output module. The feedback of the collecting module and the regulation of the control module are lacked, and the xenon lamp pumping amplification module utilizes the traveling wave three-stage amplification of the MOPA amplification technology to amplify incident seed light, so that when the laser is started, the seed light does not realize energy closed loop, and the energy of the seed light cannot be monitored and accurately regulated in real time, so that the energy extraction efficiency of an amplification system is affected. The energy closed loop is not realized by the amplified light of the xenon lamp pumping amplification module, the real-time monitoring and accurate regulation and control of the energy of the final treatment beam cannot be realized, and meanwhile, the spectrum width of the xenon lamp is large, so that the pumping energy utilization rate is low. In addition, the laser handle of the treatment output module adopts manual focusing or electric control mechanical focusing, so that mechanical errors exist, the position of the lens cannot be continuously adjusted with high precision, the error between the obtained light spot area and the theoretical value is large, and the accurate light spot area cannot be obtained.

The LD array side pumping multistage amplifying module mentioned in this embodiment has a center wavelength of 808nm and a spectral width of 400 μm, which is matched with the crystal absorption peak, so as to reduce pumping energy loss in the amplifying process. The output pump light energy can be directly controlled by an electrical signal. And the collecting module not only can obtain the energy state of the seed light, but also can obtain the energy state of the amplified light amplified by the LD array side pumping multistage amplifying module, thereby realizing energy closed-loop monitoring and further accurately controlling the energy of the therapeutic light beam.

The piezoelectric nano-translation stage 24 in this embodiment has no screw rod or worm gear assembly, can directly drive the second lens 23, has no return clearance, and can overcome mechanical errors caused by a clamping block clamping groove assembly of a manual handle and an electric handle driven by a traditional electromagnetic motor (servo or stepping motor).

As shown in fig. 5, the working principle of the present embodiment is as follows:

The seed source uses pump light generated by a fiber coupled LD laser to act on the bonded crystal. The output laser pulse is first generated 95 by the polarization beam splitter 31 of the collection module: 5, wherein the main beam passes through the combination of the polaroid, the half wave plate and the rotator of the isolation module, so that the seed light can pass through unidirectionally, interference of return light is prevented, and the safety of a seed source is protected. The secondary light beams are collected by a light beam collecting mirror 32 in the collecting module, the light signals are converted into electric information by the photoelectric conversion equipment and fed back to the control module, the control module can monitor the energy of the seed light in real time, and can regulate and control the energy state of the seed light according to the fed back light information, so that the output main seed light is 1064nm laser with the energy not less than 400 mu J, and the energy closed loop of the seed light is realized.

And then the main beam is subjected to beam expansion collimation through a beam expansion collimation module and is injected into an LD array side pumping multistage amplification module, first single-rod double-pass first-stage and second-stage energy amplification is realized through a first pumping unit consisting of 3 LD arrays, a phi 7x100 mm crystal rod, a quarter wave plate and a 0 DEG total reflection mirror, and then three-stage energy amplification is realized through a polaroid, a reflection mirror, a second pumping unit and a phi 8x100 mm crystal rod. The polarizing beamsplitter 31, which amplifies the light passing through the collection module, also generates 95:5, wherein the second main beam is incident into a KDP frequency doubling crystal of the frequency doubling module after passing through the beam expanding module, the nonlinear effect of the KDP frequency doubling crystal converts the second main beam with the wavelength of 1064nm into frequency doubling light with the wavelength of 532nm, and the frequency doubling module can be moved by steering engine equipment, so that the flexible switching of the wavelength is realized. After the second light beam is collected by the light beam collecting mirror 32 in the collecting module, the light beam information is fed back to the control module by the photoelectric conversion equipment, the control module can control the LD array according to the information fed back in real time, accurate adjustment of the energy of the amplified light beam is realized, the output main amplified light is ensured to be 1064nm laser with the pulse width of 350 ps+/-10% and the energy not less than 500mJ or 532nm laser with the energy not less than 250mJ, and the energy stability is not more than 5%.

After the second main beam frequency multiplication light is coupled into the light guide arm of the treatment output module, the treatment light beam with the energy being in line enters the laser handle from the picosecond laser through the light guide arm, and the piezoelectric nano translation stage 24 of the laser handle is adjusted to change the distance of the lens group, so that the treatment light spot area is accurately controlled. By precisely controlling the energy and spot area of the therapeutic beam, a precise therapeutic dose can be obtained to act on the skin of the patient.

The embodiment adopts an energy closed-loop feedback method, realizes the real-time monitoring and control of the energy of the seed light and the amplified light, and finally realizes the accurate control of the energy of the therapeutic light beam; and the laser handle adopts the high-precision piezoelectric nano translation table 24, so that the precision of the electric zoom handle is improved, and the accurate regulation and control of the treatment light spot area is realized.

Based on the method, the method of combining the energy of the treatment beam and the area of the light spot is adopted to realize the accurate control of the treatment dose of the picosecond beauty instrument, solve the problem that the treatment dose is not easy to control in the prior art, and improve the treatment efficiency and the comfort level of patients.

Example 2

As shown in fig. 6, this embodiment describes a laser treatment energy adjustment method applied to a picosecond laser beauty treatment instrument, the picosecond laser beauty treatment instrument having a laser and a controller, the laser being configured to emit seed light for treatment, the controller being configured to monitor based on collected beam energy data, adjust the laser when the LD array side pumping multistage amplification module incidence requirement is not met, and adjust the LD array side pumping multistage amplification module when the amplification requirement is not met, so as to control laser treatment energy output by the picosecond laser beauty treatment instrument; the laser treatment dose control method comprises the following steps:

step 1, acquiring sub-beam energy data of a main beam and a sub-beam generated after seed light is split according to a preset splitting proportion in real time, and generating second sub-beam energy data of a second main beam and a second sub-beam after the main beam is amplified and split according to the same splitting proportion; the light splitting ratio is 95:5.

Step 2, comparing the two secondary beam energy data with a preset theoretical reference value after being processed according to corresponding amplification proportion, and judging whether the second primary beam energy data reaches a preset target amplification energy or not;

and step 3, otherwise, the controller adjusts the seed light emitted by the laser and the LD array side pumping multistage amplifying module until the second-time beam energy data reaches target amplified energy after amplifying treatment, and then guides the frequency multiplication light of the second main beam to be output as laser treatment energy after coupling the frequency multiplication light, so as to finish laser treatment energy adjustment.

The main beam amplification of this embodiment may use an LD array side-pumped multistage amplification module to amplify energy, and three LD arrays are uniformly placed in Nd: around the YAG crystal rod. The central wavelength of the pumping light output by the LD array is 808nm, the spectral width is 400 mu m, and the pumping light is matched with the crystal absorption peak, so that the pumping energy loss in the amplifying process can be reduced.

Therefore, in the step 3, not only the seed light emitted by the laser can be adjusted and controlled, but also the seed light can be adjusted in an amplifying link, so that the aim of finally adjusting the seed light to the second main light beam is fulfilled.

The embodiment adopts an energy closed-loop feedback method, realizes the real-time monitoring and control of the energy of the seed light and the amplified light, and finally realizes the accurate control of the energy of the therapeutic light beam.

The technical scope of the present invention is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should be included in the scope of the present invention.

Claims (9)

1. The treatment dosage control system of the picosecond laser beauty instrument is characterized by comprising a seed source, an isolation module, a beam expansion collimation module, an LD array side pumping multistage amplification module, a beam expansion module, a frequency multiplication module and a treatment output module which are sequentially connected, wherein the output end of the seed source is also connected with the input end of a collection module, the output end of the collection module is connected with the input end of a control module, the output end of the control module is respectively connected with the seed source and the input end of the LD array side pumping multistage amplification module, and the output end of the LD array side pumping multistage amplification module is also connected with the input end of the collection module;

The seed light of the seed source is output in a laser pulse form, and after being split by the collecting module, a main beam and a secondary beam are formed, the control module receives the secondary beam which is fed back by the collecting module and expressed in an electric signal form, and regulates and controls the energy state of the seed source to form an energy closed loop of the seed source;

The main beam enters the LD array side pumping multistage amplifying module through the beam expanding collimation module, is split again by the collecting module after energy amplification, and the control module receives the split secondary beam expressed in the form of an electric signal and fed back by the collecting module and regulates the LD array side pumping multistage amplifying module to form an energy closed loop for regulating the main beam; the main beam after light splitting passes through a beam expanding module and a frequency doubling module and is output by a treatment output module for treatment.

2. The picosecond laser cosmetic instrument treatment dosage control system according to claim 1, characterized in that the LD array side pumping multistage amplification module comprises two pumping units (11) and a crystal rod (12) placed side by side; the pumping unit (11) comprises three LD arrays, and the three LD arrays are uniformly distributed on the periphery of the crystal rod (12).

3. The picosecond laser cosmetic treatment dosage control system of claim 1, wherein the treatment output module comprises a laser handle; the laser handle comprises a handle shell (21), a first lens (22), a second lens (23) and a piezoelectric nano translation stage (24); the first lens (22) is fixedly arranged on the handle shell (21), and the second lens (23) is loaded on the piezoelectric nano translation stage (24); the piezoelectric nano translation stage (24) is movably arranged on the handle shell (21) and is used for controlling the one-dimensional movement of the second lens (23) so as to change the distance between the second lens and the first lens (22) to accurately adjust the size of a therapeutic light spot.

4. A treatment dosage control system of a picosecond laser beauty treatment instrument according to claim 3, wherein the treatment output module further comprises a light guide arm, and two ends of the light guide arm are respectively connected with the frequency doubling module and the laser handle and used for reflecting the laser beam output by the frequency doubling module into the handle shell (21).

5. The picosecond laser beauty treatment instrument treatment dosage control system according to claim 1, wherein the collection module comprises two groups of polarization spectroscopes (31), a beam acquisition mirror (32), a photoelectric detector (33) and a signal conditioning unit (34) electrically connected with the two photoelectric detectors (33) respectively, which are sequentially arranged; the signal conditioning unit (34) is electrically connected with the control module, and the signal conditioning unit (34) is used for converting collected light beam information into an electric signal and transmitting the electric signal to the control module.

6. The picosecond laser cosmetic instrument treatment dosage control system according to claim 5, wherein the detection wavelength range of the photodetector (33) is 500nm to 1100nm.

7. The therapeutic dose control system of picosecond laser cosmetic instrument according to claim 1, wherein the frequency doubling module is composed of a frequency doubling crystal and a 1064nm narrowband filter for ensuring that only a pulsed laser beam having a wavelength of 532nm is output.

8. The picosecond laser cosmetic treatment dosage control system of claim 1, wherein the seed source is comprised of a pump source and a bonded crystal; wherein, the pumping source is an optical fiber coupling LD laser, and the bonding crystal is a laser medium Nd: YAG crystal and saturable absorber Cr4+: YAG bonding.

9. The laser treatment energy adjusting method is applied to a picosecond laser beauty instrument, the picosecond laser beauty instrument is provided with a laser and a controller, the laser is used for emitting seed light for treatment, the controller monitors according to collected beam energy data, adjusts the laser when the incidence requirement of the LD array side pumping multistage amplifying module is not met, and adjusts the LD array side pumping multistage amplifying module when the amplifying requirement is not met so as to control the laser treatment energy output by the picosecond laser beauty instrument; the laser treatment dosage control method is characterized by comprising the following steps of:

Acquiring sub-beam energy data of a main beam and a sub-beam generated after seed light is split in a pre-examination beam splitting proportion in real time, and generating second sub-beam energy data of a second main beam and a second sub-beam generated after the main beam is amplified and split in the same beam splitting proportion;

Comparing the two secondary beam energy data with a preset theoretical reference value after being processed according to corresponding amplification proportion, and judging whether the second main beam energy data reaches a preset target amplified energy or not;

Otherwise, the controller adjusts the seed light emitted by the laser and the LD array side pumping multistage amplifying module until the second-time beam energy data reaches target amplifying energy after amplifying treatment, and then guides the frequency multiplication light of the second main beam to be output as laser treatment energy after coupling the frequency multiplication light, so as to finish laser treatment energy adjustment.