Design method of a laser treatment device and the laser treatment device

Abstract

The present invention relates to a design method of a laser treatment device. Step 1: Obtain the parameters of the light emitting component; Step 2: Calculate the spot size formed by the light emitting component on the light reflecting component based on the parameters of the light emitting component and the axial distance between the light reflecting component and the light emitting component; Design the laser transmission path where light emits from the light emitting component, passes through the light reflecting component, and then reaches the light receiving component according to the spot size; Step 3: Analyze the assembly relationship of the light emitting component, the light emitting component, and the light receiving component according to the laser transmission path; Set an antireflection film on the incident end face and the output end face of the light receiving component; Add a metal layer and a hardening layer on the reflecting surface of the light reflecting component. The laser treatment device manufactured according to this design method can reduce the loss of laser transmission between various parts, and further enhance the reflection of laser and increase the absorption of laser energy by plating a metal layer and a hardening layer on the light reflecting component and setting an antireflection film on the light receiving component, thereby reducing the energy loss during laser transmission.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly, to a design method of a laser treatment device and the laser treatment device thereof. Background Art

[0002] With the continuous exploration and discovery of new technologies, treatment methods and treatment plans in the field of laser and medicine, new opportunities have emerged in the market of laser medical devices, and at the same time, it has good development prospects in this field.

[0003] Laser treatment devices have become relatively common working devices in laser treatment due to characteristics such as being portable, avoiding cross-infection, having intelligent human-computer interaction, and being convenient to move. A laser treatment device generally includes a handle, and the handle is equipped with an optical fiber, a reflector, and a light needle. The reflector transmits the light of the optical fiber to the light needle, and then the laser output by the light needle is used for treatment. However, light will be lost during the transmission process, and the more the loss, the higher the generated temperature.

[0004] Among them, testing the products in the existing market, it is found that the 2940nm wavelength Er laser has a large attenuation during transmission. The energy attenuation from the optical fiber to the light needle output is 25 - 30%, and only 70% to 75% of the energy transmitted from the optical fiber can be achieved. And the 25% - 30% of the loss will generate heat energy, which is likely to damage the mirror surface of the reflector inside the handle, cause burnout, breakdown, high-temperature gasification to produce imprints or damage marks, resulting in a reduction in its light transmission energy, leading to low efficiency or inability to use. Summary of the Invention

[0005] In order to overcome the problem that the 2940nm wavelength Er laser has a large transmission loss in the existing laser treatment device, the present invention provides a design method of a laser treatment device, which can reduce the loss of laser during transmission.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a design method of a laser treatment device, including the following steps:

[0007] Step 1: Obtain the parameters of the light emitting element;

[0008] Step 2: Calculate the spot size formed by the light emitting element on the light reflecting element based on the parameters of the light emitting element and the axial distance between the light reflecting element and the light emitting element; design the laser transmission path from the light emitting element, passing through the light reflecting element and reaching the light receiving element according to the size of the spot;

[0009] Step 3: Analyze the assembly relationship of the light emitting element, the light reflecting element, and the light receiving element according to the laser transmission path;

[0010] In the above technical solution, by setting the parameters and positional relationship of the light emitting component and the light reflecting component, the spot size formed by the laser output from the light emitting component on the light reflecting component is calculated. Then, based on the spot size and the target spot size formed on the output end face of the light receiving component, the optimal laser transmission path is designed. According to the designed optimal laser transmission path, the assembly relationship and related parameters of the light emitting component, the light reflecting component, and the light receiving component are obtained, improving the assembly accuracy of each component and preventing the laser from shifting during transmission.

[0011] Preferably, in step three, according to the analysis and calculation of the laser transmission path, the structural parameters and assembly parameters of the light receiving component and the light reflecting component are determined under the condition that the spot size on the output end face of the light receiving component is the same as the diameter of the output end face of the light receiving component, so as to determine the assembly relationship among the light emitting component, the light reflecting component, and the light receiving component. When the spot size on the output end face of the light receiving component is the same as the diameter of the output end face of the light receiving component, the output spot reaches the maximum, and the energy output efficiency also reaches the maximum. Taking this as the goal, assembling the light emitting component, the light reflecting component, and the light receiving component can maximize the laser transmission efficiency.

[0012] Preferably, the light emitting component is an optical fiber, and the parameters of the optical fiber include wavelength and diameter. The wavelength and diameter of the optical fiber are correspondingly designed according to the target spot formed by the hardness of the object to be cut.

[0013] Preferably, the light receiving component is an optical needle. The structural parameters of the light receiving component include the length, taper, and diameter of the incident end face of the optical needle. The assembly parameters of the light receiving component include the distance from the incident end face of the optical needle to the center of the spot on the light reflecting component and the incident angle of the incident end face of the optical needle. On the basis of assembling to meet the assembly relationship, the above structure of the light receiving component also needs to meet the parameter requirements to further maximize the laser energy output efficiency. The diameter of the incident end face of the optical needle is limited to be larger than the diameter of the spot.

[0014] Preferably, in both step two and step three, the calculation and analysis are performed through the optical design software zemax opticstudio.

[0015] Preferably, the method for enhancing the laser penetration efficiency of the light receiving component includes setting an antireflection film on the incident end face and the output end face of the light receiving component. The method for enhancing the reflection efficiency of the light reflecting component includes coating a metal layer and a hardening layer on the reflecting surface of the light reflecting component at one time. The thickness of the metal layer is 300nm - 600nm, and the thickness of the hardening layer is 400nm - 700nm. Preferably, the specific steps for setting the antireflection film on the incident end face and the output end face of the light receiving component are as follows:

[0016] S4.1: Surface treatment, cleaning the light receiving component. The cleaning specifically involves precision polishing and then cleaning its front and rear end faces and side faces;

[0017] S4.2: Primer coating, coating the surface of the workpiece with coating oil;

[0018] S4.3: Drying the primer coating, setting the drying temperature at 60 - 70 °C and the drying time at 1.5 - 2.5 hours to dry the coating oil and form a paint film;

[0019] S4.4: Coating. Heating the tungsten wire to a preset temperature to evaporate silicon dioxide and form an anti - reflection film at both ends of the optical needle respectively;

[0020] S4.5: Top coating, coating the surface of the anti - reflection film with coating material;

[0021] S4.6: Drying the top coating, setting the drying temperature at 50 - 60 °C and the drying time at 1 - 2 hours.

[0022] Using silicon dioxide as the material of the anti - reflection film and using the above - mentioned coating process to process the anti - reflection film on the light - receiving component can further increase the transmittance of the light - receiving component and improve the light transmission efficiency.

[0023] Preferably, the hardness of the hardening layer is greater than 118 HV Vickers hardness.

[0024] A laser treatment device includes a housing, a light - emitting component, a light - receiving component and a light - reflecting component all installed in the housing. The structures and assembly relationships of the light - emitting component, the light - receiving component and the light - reflecting component are based on the design method of the above - mentioned laser treatment device. The assembly relationships of the light - emitting component, the light - receiving component and the light - reflecting component and the structural parameters of the light - reflecting component and the light - receiving component obtained by the above - mentioned design method are used to select and process components according to the corresponding structural parameters, and then the device is assembled according to the assembly relationship to provide the laser transmission efficiency of the laser treatment device.

[0025] Preferably, the axes of the light emitting element and the light receiving element are perpendicular to each other and intersect at the center point on the reflecting surface of the light reflecting element; the angle between the axis of the light emitting element and the reflecting surface is 45 degrees; the wavelength of the light reflecting element is 2780 - 2940 nm, the diameter of the light emitting element is 400 - 460 NA; the axial distance between the light reflecting element and the light emitting element is 0.5 - 4 mm; the length of the light receiving element is 16 - 17 mm, the taper is 4° - 7°, and the diameter of the incident end face is 1 - 1.5 mm; the distance from the incident end face of the light receiving element to the center point of the light reflecting element is 1.5 - 2 mm, and the incident angle of the incident end face of the light receiving element is 85° - 90°; the thickness of the light reflecting element is 3 - 4 mm. Under the above parameters, the laser emitted by the light emitting element forms a light spot on the light reflecting element, and the axis of the light spot of the light receiving element passes through the center of the light spot, so that most of the light spots can be irradiated on the incident end face of the light receiving element, making the output end face of the light receiving element the same size as the light spot, reducing light leakage, improving the light receiving rate, thereby reducing energy loss and maximizing the laser transmission efficiency. If the light reflecting element is a concave mirror, its radian size is 3 - 4 mm, the radian angle is 85° - 90°, and the surface finish of the arc surface is 4 - 5 nm.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: The laser treatment device manufactured according to the present design method has high assembly accuracy, enabling the laser not to shift during transmission and reducing the loss of laser transmission between parts. The metal layer, hardening layer are sequentially coated on the reflecting surface of the light reflecting element and the antireflection film is provided on the light receiving element to respectively enhance the reflection of the laser and increase the absorption of the laser spot energy, thereby reducing the energy loss rate during laser transmission and ultimately improving the laser transmission efficiency of the laser treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a flowchart of a design method of a laser treatment device of the present invention;

[0028] Figure 2 is a schematic diagram of the optical path transmission path of the present invention;

[0029] Figure 3 is the transmittance of the optical needle before coating;

[0030] Figure 4 is the transmittance of the optical needle after coating;

[0031] Figure 5 is a schematic structural diagram of a design method of a laser treatment device of the present invention;

[0032] Figure 6 is Figure 5 the sectional structural diagram in the H direction of

[0033] Figure 7 It is a schematic structural diagram after the reflecting surface is coated with a film;

[0034] Figure 8 It is a comparison diagram of the effects between a laser treatment device prepared by a design method of a laser treatment device according to the present invention and existing products. Specific embodiments

[0035] The accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent; for better illustration of this embodiment, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. The positional relationships described in the accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent.

[0036] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] The technical solutions of the present invention will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings:

[0038] Embodiment 1

[0039] As Figure 1-2 shown in Embodiment 1 of a design method of a laser treatment device, it includes the following steps:

[0040] Step 1: Obtain the parameters of the light-emitting component; the light-emitting component is an optical fiber, and the parameters of the optical fiber include wavelength and diameter. The wavelength and diameter of the optical fiber are correspondingly designed according to the target light spot formed by the hardness of the object to be cut. In this embodiment, the target is to cut hard tissues, the wavelength of the optical fiber is 2780 - 2940 nm, and the diameter of the optical fiber is 400 - 460 NA.

[0041] Step 2: Calculate the spot size formed by the laser output from the light emitting component on the light reflecting component through the optical design software zemax opticstudio based on the parameters of the light emitting component and the axial distance between the light reflecting component and the light emitting component; design the laser transmission path from the light emitting component, through the light reflecting component, and then to the light receiving component according to the spot size through the optical design software zemax opticstudio; in this embodiment, the axial distance between the light reflecting component and the light emitting component is set to 0.5 - 4 mm. The axial distance refers to the straight-line distance from the laser emitting end of the light emitting component to the reflecting surface of the light reflecting component. If the light reflecting component is a plane mirror, the axial distance is 0.5 - 1 mm; if it is a concave mirror, the axial distance is 1 - 4 mm, preferably 2.8 - 4 mm.

[0042] Step 3: Analyze and calculate the structural parameters and assembly parameters of the light receiving component and the light reflecting component that can make the spot size at the output end face of the light receiving component, i.e., the target spot, the same as the diameter of the output end face of the light receiving component according to the laser transmission path through the optical design software zemax opticstudio, so as to determine the assembly relationship among the light emitting component, the light reflecting component, and the light receiving component. In this embodiment, the light receiving component is an optical needle. The structural parameters of the light receiving component include the length, taper, and the diameter of the incident end face of the optical needle. The assembly parameters of the light receiving component include the distance from the incident end face of the optical needle to the center of the spot on the light reflecting component and the incident angle of the incident end face of the optical needle. The light reflecting component is a concave mirror. The structural parameters of the light reflecting component include the radian size, radian angle, and the surface finish of the arc surface of the light reflecting component. On the basis of assembling while satisfying the assembly relationship, the structures of the above-mentioned light receiving component and light reflecting component also need to meet the parameter requirements to further maximize the efficiency of laser energy output. The diameter of the incident end face of the optical needle is larger than the diameter of the output end face.

[0043] Working principle of this embodiment: Calculate the spot size formed by the laser output from the light emitting component on the light reflecting component by setting the parameters and positional relationship between the light emitting component and the light reflecting component, then design the optimal laser transmission path according to the spot size and the target spot size formed at the output end face of the light receiving component, and obtain the assembly relationship among the light emitting component, the light reflecting component, and the light receiving component according to the optimal laser transmission path, improve the assembly accuracy of each component, and prevent the laser from shifting during transmission.

[0044] Beneficial effects of this embodiment: The laser treatment device manufactured according to the design method of this embodiment has high assembly accuracy, prevents the laser from shifting during transmission, and reduces the loss of laser transmission between each component.

[0045] Embodiment 2

[0046] As Figure 1Shown is Embodiment 2 of a design method for a laser treatment device. Based on Embodiment 1, the laser penetration efficiency of the light receiver and the reflection efficiency of the light reflector are further enhanced. The method for increasing the laser penetration efficiency includes setting antireflection films on the incident end face and the output end face of the light receiver, and the specific steps are as follows:

[0047] S4.1: Surface treatment. The front and rear ends and the side of the light receiver are finely polished and then cleaned;

[0048] S4.2: Primer coating. Coating film-forming oil on the surface of the workpiece;

[0049] S4.3: Primer coating drying. Set the drying temperature to 60 - 70 degrees and the drying time to 1.5 - 2.5 hours to dry the film-forming oil and form a paint film;

[0050] S4.4: Coating. Heat the tungsten wire to a preset temperature to evaporate silicon dioxide and form antireflection films on both ends of the optical needle respectively;

[0051] S4.5: Top coating. Coating oil on the surface of the antireflection film;

[0052] S4.6: Top coating drying. Set the drying temperature to 50 - 60 degrees and the drying time to 1 - 2 hours.

[0053] Using silicon dioxide as the material of the antireflection film and using the above coating process to process the antireflection film on the light receiver can further increase the transmittance of the light receiver and improve the light transmission efficiency. As Figure 3 and Figure 4 shown, the comparison of the transmittance without the antireflection film and with the antireflection film set.

[0054] The method for enhancing the reflection efficiency includes sequentially coating a metal layer and a hardening layer on the reflection surface of the light reflector. The thickness of the metal layer is 300nm - 600nm, the thickness of the hardening layer is 400nm - 700nm, and the hardness of the hardening layer is greater than 118HV Vickers hardness.

[0055] On the basis of improving the assembly accuracy of each component so that the laser does not deviate during transmission, sequentially plating a metal layer and a hardening layer on the reflection surface of the light reflector and setting an antireflection film on the light receiver respectively achieve enhancing the reflection of the laser and improving the absorption rate of the laser spot energy, so as to reduce the energy loss rate during laser transmission, and finally achieve improving the laser transmission efficiency and the laser treatment effect of the laser treatment device.

[0056] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0057] Embodiment 3

[0058] As Figure 5-6Shown is an embodiment of a laser treatment device. The light reflector, light emitter, and light receiver are selected and fabricated according to the design method of Embodiment 2, and the whole is assembled according to the designed assembly relationship. Specifically, it includes a housing 1, a light emitter 2, a light receiver 3, and a light reflector 4 all installed in the housing 1. The axes of the light emitter 2 and the light receiver 3 are perpendicular to each other and intersect at a point on the reflecting surface 401 of the light reflector 4, and this point is the center point of the reflecting surface 401; among them, the angle between the axis of the assembled light emitter 2 and the reflecting surface 401 is 45 degrees. The wavelength of the light emitter 2 is 2940 nm, and the diameter of the light emitter 2 is 460 NA; the light reflector 4 is a concave mirror and the axial distance from the light emitter 2 is 2 mm (if the light reflector is a plane mirror, it is 0.8 mm); the length of the light receiver 3 is 16 mm, the taper is 5°, and the diameter of the incident end face is 1.35 mm; the distance from the incident end face of the light receiver 3 to the center point of the light reflector 4 is 1.8 mm, and the incident angle of the incident end face of the light receiver is 88°; the thickness of the light reflector 4 is 3 mm, the arc size of the light reflector is 3 mm, the arc angle is 90 degrees, and the surface finish of the arc surface of the light reflector is 4 nm. The spot diameter formed by the light emitter 2 on the light reflector 4 is smaller than the diameter of the receiving end face of the light receiver 3. Under the above parameters, the laser emitted by the light emitter 2 forms a spot on the light reflector 4, and the axis of the spot of the light receiver 3 passes through the center of the spot, so that most of the spots can irradiate on the incident end face of the light receiver 3, making the diameter of the output end face of the light receiver 3 the same as the size of the target spot, reducing light leakage, improving the laser reception rate, thereby reducing laser energy loss and ensuring that the laser transmission efficiency reaches the maximum.

[0059] Further, the light reflector 4 includes a D-shaped cross-section; the reflecting surface 401 is arranged at the bottom end of the light reflector 4 and is an arc surface; the housing 1 is provided with an installation cavity 101 that fits the outer shape of the light reflector 4. After the light reflector 4 is installed in the installation cavity 101, the light reflector 4 is restricted by the installation cavity 101 and cannot rotate to prevent the light reflector 4 from rotating during use and causing the position of the spot to shift, so that the reflecting surface 401 necessarily faces the light emitter 2. The light reflector 4 is provided with a limiting boss 402, and the installation cavity 101 is provided with a limiting step 1011 that abuts against the bottom surface of the limiting boss 402. The housing 1 further includes a cover 5 for pressing the light reflector 4, and the cover 5 is detachably connected to the housing 1. After the light reflector 4 is installed in the installation cavity 101, the top surface of the limiting step 1011 abuts against the bottom surface of the limiting boss 402, and the fixed cover 5 is pressed and fixed to realize the height limitation of the light reflector 4 in the housing 1 and prevent it from moving in the vertical direction, ensuring that the intersection point of the axes of the light emitter 2 and the light receiver 3 is at the center point of the reflecting surface 401.

[0060] In this embodiment, the light emitting component 2 includes a coaxially mounted optical fiber fixing part 201 and an optical fiber 202. The housing 1 is provided with a first mounting groove 102 for mounting the optical fiber fixing part 201. After the optical fiber fixing part 201 is inserted into the first mounting groove 102, the first mounting groove 102 communicates with the mounting cavity 101. Therefore, the laser emitted by the optical fiber 202 can enter the mounting cavity 101 and reach the light reflecting component 4. The axis of the optical fiber is collinear with the axis of the first mounting groove 102. Fixing the optical fiber 202 through the optical fiber fixing part 201 ensures that the relationship between the axis of the optical fiber 202 and the axis of the light receiving component 3 conforms to the designed assembly relationship and will not shift. The optical fiber fixing part 201 is threadedly connected to the first mounting groove 102. By rotating the optical fiber fixing part 201, the installation depth of the optical fiber fixing part 201, that is, the axial distance between the optical fiber and the emitting mirror, can be adjusted, so as to adjust the size of the light spot formed by the laser emitted by the optical fiber 202 on the reflecting surface 401.

[0061] The light receiving component 3 includes a coaxially mounted optical pin 301 and an optical pin fixing part 302. The housing 1 is provided with a second mounting groove 103 for mounting the optical pin fixing part 302. The optical pin 301 penetrates through the optical pin fixing part 302. The optical pin fixing part 302 is inserted into the second mounting groove 103. The axis of the optical pin 301 is collinear with the axis of the second mounting groove 103. One end of the second mounting groove 103 is provided with a through hole communicating with the mounting cavity 101. The optical pin 301 is located in the through hole or passes through the through hole. Fixing the optical pin fixing part 302 to the second mounting groove 103 can realize the quick replacement and disassembly of the light receiving component 3. Specifically, a rubber ring is sleeved on the outer surface of the optical pin fixing part 302, and the rubber ring is in interference fit with the second mounting groove 103. The optical pin 301 is a cone made of sapphire material in this embodiment.

[0062] Such as Figure 7As shown in the figure, the reflecting surface 401 is further provided with a metal layer and a hardening layer 403. The thickness of the metal layer is 300 nm - 600 nm, and the thickness of the hardening layer 403 is 400 nm - 700 nm. The metal layer is the main reflecting film, and the following materials can be selected according to the characteristics: one of aluminum, gold, copper, etc. The hardening layer 403 is made of a material with a relatively high hardness, with a hardness of at least 118 HV Vickers hardness, to increase the surface hardness and heat resistance, etc., so as to increase the laser resistance. The following materials can be selected according to the characteristics: one of silicon, graphite, diamond, quartz, sapphire, etc. Both the metal layer and the hardening layer are formed on the reflecting surface 401 successively through a coating process, and the coating process can be one of electroplating or sputtering. By coating the reflecting surface 401, the reflectivity of the laser is improved, and the energy loss caused by reflection is reduced. In order to enhance the adsorption and bonding effect of the metal layer on the reflecting surface 401, an adhesion layer is coated between the metal layer and the reflecting surface 401, and an adhesive material such as nickel chromide is selected. In order to enhance the reflectivity of the metal layer to the laser, a reflecting layer is further coated between the metal layer and the adhesion layer, and a metal material such as chromium is used.

[0063] Antireflection films are provided at both ends of the optical needle 301. The antireflection film can increase the transmittance of light, reduce the scattering rate, and reduce the energy loss caused by refraction and reflection when the light spot irradiates the optical needle 301.

[0064] The working principle or process of this embodiment: The laser generated by the laser generator is output to the reflecting surface 401 through the optical fiber 202 and forms a light spot on the reflecting surface 401. Through the action of the reflecting surface 401, the laser is reflected to the position of the optical needle 301. The included angle between the axis of the optical fiber core 202 and the reflecting surface 401 is 45 degrees. Therefore, the included angle between the reflected laser and the axis of the optical fiber core 202 is 90 degrees. Therefore, the reflected laser is collinear with the axis of the optical needle 301. Therefore, the axis of the optical needle 301 is collinear with the reflected laser, that is, it passes through the center of the light spot. Then, by adjusting the distance between the optical fiber core 202 and the reflecting surface 401, the size of the light spot is adjusted so that the diameter of the light spot is smaller than the end face diameter of the optical needle 301, so that all the laser is received by the optical needle 301. The diameter of the output end face of the optical needle 301 is the same as the size of the target light spot, so that the light spot on the light reflecting member can be all output, and the output energy is maximized.

[0065] The beneficial effects of this embodiment: The laser output by the optical fiber core 202 can be completely received by the optical needle 301, without light leakage, improving the laser acceptance rate and reducing the energy loss caused by light leakage. Comparing the laser treatment device of this embodiment with existing products under the same parameters, the comparison results are as follows Figure 8As shown, the laser transmission efficiency is increased by about 7%. During the process of improving the laser transmission efficiency, the higher the laser transmission efficiency, the less the loss. The less the laser loss, the lower the heat temperature. The service lives of other components such as the light emitting component, the light reflecting component, and the light receiving component will be correspondingly prolonged, and the operation process will be more stable than before. At the same time, it can also reduce the customer's maintenance cost and time. The most important thing is to improve the laser energy transmission efficiency and enhance the therapeutic effect of the laser energy.

[0066] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A design method of a laser treatment device, the laser treatment device comprising a light emitting member (2), a light receiving member (3) and a light reflecting member (4), characterized in that, It includes the following steps: Step 1: Obtain the parameters of the light emitting component; Step 2: Obtain the axial distance between the light emitting component and the light reflecting component. Calculate the spot size formed by the laser emitted by the light emitting component on the light reflecting component according to the parameters of the light emitting component and the axial distance between the light reflecting component and the light emitting component. Design the laser transmission path where the laser emits from the light emitting component, is reflected by the light reflecting component to the light receiving component, and then is output by the light receiving component according to the size of the spot; Step 3: Design the light reflecting component for enhancing the laser reflection efficiency and the light receiving component for enhancing the laser penetration efficiency according to the laser transmission path, and design the assembly relationship among the light emitting component, the light reflecting component, and the light receiving component according to the laser transmission path; The design method of the assembly relationship among the light emitting component, the light reflecting component, and the light receiving component includes designing the structural parameters and assembly parameters of the light receiving component and the light reflecting component according to the laser transmission path so that the spot diameter output at the output end face of the light receiving component is the same as the diameter of the output end face of the light receiving component; Determine the assembly relationship among the light emitting component, the light reflecting component, and the light receiving component according to the structural parameters and assembly parameters of the light receiving component and the light reflecting component.

2. The design method of the laser treatment device according to claim 1, characterized in that, The light emitting component is an optical fiber, and the parameters of the optical fiber include wavelength and diameter.

3. The design method of the laser treatment device according to claim 2, wherein The light receiving component is an optical needle. The structural parameters of the light receiving component include the length, taper, and diameter of the incident end face of the optical needle. The assembly parameters of the light receiving component include the distance from the incident end face of the optical needle to the spot center of the light reflecting component and the incident angle of the incident end face of the optical needle.

4. The design method of the laser treatment device according to any one of claims 1-3, characterized in that, The acquisition of the spot size formed by the laser emitted by the light emitting component on the light reflecting component in Step 2 and the structural parameters and assembly parameters of the light receiving component in Step 3 are both processed by using the calculation module of the optical design software zemax opticstudio.

5. The design method of the laser treatment device according to any one of claims 1-3, characterized in that The method for enhancing the laser penetration efficiency of the light receiving component includes Setting an anti-reflection film on the incident end face and the output end face of the light receiving component.

6. The design method of the laser treatment device according to claim 5, characterized in that, The setting of the anti-reflection film includes the following steps: S4.1: Surface treatment, clean the light receiving component; S4.2: Primer coating, coat the coating oil on the surface of the workpiece; S4.3: Primer coating drying, set the drying temperature to 60 - 70 degrees, and the drying time to 1.5 - 2.5 hours to dry the coating oil and form a paint film; S4.4: Coating, heat the tungsten wire to the preset temperature, and make the coating material silicon dioxide evaporate to form anti-reflection films on both ends of the optical needle respectively; S4.5: Top coating, coat the oil material on the surface of the anti-reflection film; S4.6: Top coating drying, set the drying temperature to 50 - 60 degrees, and the drying time to 1 - 2 hours.

7. The design method of the laser treatment device according to claim 5, characterized in that The method for enhancing the reflection efficiency of the light reflecting component includes Coating a metal layer and a hardening layer on the reflection surface of the light reflecting component in sequence; The thickness of the metal layer is 300nm - 600nm, and the thickness of the hardening layer is 400nm - 700nm.

8. A laser treatment device, comprising a housing (1), a light emitting member (2), a light receiving member (3) and a light reflecting member (4) all installed in the housing (1), characterized in that, The structures and assembly relationships of the light emitting component (2), the light receiving component (3) and the light reflecting component (4) are based on the design method of the laser treatment device according to any one of the above claims 1-7.

9. A laser treatment device according to claim 8, characterized in that, The axes of the light emitting component (2) and the light receiving component (3) are perpendicular to each other and intersect at the center point on the reflecting surface (401) of the light reflecting component (4); the angle between the axis of the light emitting component (2) and the reflecting surface (401) is 45 degrees; the wavelength of the light emitting component is 2780-2940 nm, the diameter of the light emitting component is 400-460 NA; the axial distance between the light reflecting component and the light emitting component is 0.5-4 mm; the length of the light receiving component is 16-17 mm, the taper is 4°-7°, and the diameter of the incident end face is 1-1.5 mm; the distance from the incident end face of the light receiving component to the center point of the light reflecting component is 1.5-2 mm, and the incident angle of the incident end face of the light receiving component is 85°-90°; the thickness of the light reflecting component (4) is 3-4 mm.

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