Light path system and laser therapeutic instrument

Abstract

The utility model discloses a light path system and a laser therapeutic instrument, and relates to the technical field of medical instruments, the light path system is used for the laser therapeutic instrument, the light path system comprises a light source assembly, a light combination assembly and a dispersion assembly, the light source assembly is used for emitting a plurality of beams of first laser with different wavelengths; the light combining assembly is used for receiving multiple beams of first laser with different wavelengths and combining the multiple beams of first laser with different wavelengths into one beam of second laser; the dispersion assembly receives the second laser, disperses the second laser to form and output multiple beams of third laser with different wavelengths, and enables the focal points of the multiple beams of third laser to be located on the same straight line at intervals. The optical path system provided by the utility model enables laser energy with different wavelengths to act on target areas with different levels and depths, thereby realizing more effective three-dimensional layered laser treatment.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an optical path system and a laser therapy device. Background Technology

[0002] Using laser energy to treat biological tissue diseases is a common practice in laser therapy. To achieve layered treatment, the existing treatment methods generally fall into the following two categories:

[0003] One approach involves depositing multiple laser wavelengths onto biological tissue, exposing the tissue to a single-wavelength, multi-wavelength handheld device in repeated treatment phases to achieve multi-wavelength, layered treatment. The disadvantages of this method are that it is time-consuming, requires multiple handheld devices with different wavelengths, and is expensive.

[0004] Another approach involves diffracting a single-wavelength laser beam through a multifocal diffraction element and a focusing lens to create multiple beams. This diffraction is then focused at a specific distance from the output, transforming the two-dimensional laser beam matrix into a three-dimensional layered focusing array, thus achieving layered treatment. However, this method uses multifocal diffraction elements that are complex to manufacture, expensive, and lack versatility (applicable only to specific spot sizes and divergence angles). Furthermore, because a single wavelength of laser light is used, its penetration ability into biological tissue is fixed. Although layered focusing is achieved through optical elements, significant energy attenuation occurs at deeper layers, resulting in poor treatment efficacy for deeper tissues. Utility Model Content

[0005] The main purpose of this invention is to propose an optical path system and a laser therapy device, which aims to enable different wavelengths of laser energy to act on target areas at different depths, thereby achieving more effective three-dimensional layered laser therapy.

[0006] To achieve the above objectives, the present invention proposes an optical path system for use in a laser therapy device. The optical path system includes a light source component, a beam combining component, and a dispersion component. The light source component is used to emit multiple first laser beams of different wavelengths. The beam combining component is used to receive multiple first laser beams of different wavelengths and combine them into a second laser beam. The dispersion component receives the second laser beam, disperses it to form and output multiple third laser beams of different wavelengths, and ensures that the focal intervals of the multiple third laser beams are located on the same straight line.

[0007] In one embodiment, the dispersive component includes a plurality of lenses, the plurality of lenses of different materials being arranged sequentially along the transmission direction of the second laser.

[0008] In one embodiment, the plurality of lenses are made of at least two of the following materials: crown glass, heavy flint glass, ultraviolet fused silica, sapphire crystal, or calcium fluoride crystal.

[0009] In one embodiment, the light source assembly includes multiple laser emitters of different wavelengths, and the light combining assembly includes an optical fiber combiner. One end of the optical fiber combiner is connected to the multiple laser emitters via optical fibers, and the other end of the optical fiber combiner is connected to an output connector.

[0010] Multiple laser emitters emit multiple beams of the first laser at different wavelengths, which are then combined into the second laser via the optical fiber and the optical fiber combiner, and emitted from the output connector.

[0011] In one embodiment, the light source assembly includes multiple laser emitters of different wavelengths, which emit multiple beams of the first laser at different wavelengths. The light combining assembly includes multiple coupling mirrors, which emit multiple beams of the first laser at different wavelengths respectively, and these beams are coupled into the second laser via the multiple coupling mirrors.

[0012] In one embodiment, the optical path system further includes a collimation component disposed between the beam combining component and the dispersion component. The collimation component is used to receive the second laser from the beam combining component, convert the second laser into a parallel beam, and then transmit it to the dispersion component.

[0013] In one embodiment, the optical path system further includes a scanning motion component disposed between the collimation component and the dispersion component. The scanning motion component is used to receive the parallel beam from the collimation component, convert the parallel beam into an array of light spots, and transmit the array of light spots to the dispersion component.

[0014] In one embodiment, the scanning motion component is an XY galvanometer or two wedge-shaped mirrors at an angle to convert the parallel beam into an array of light spots.

[0015] In one embodiment, the light source assembly includes a single laser capable of simultaneously outputting multiple wavelengths.

[0016] This utility model also proposes a laser therapy device, including the optical path system, handle and main unit as described above, wherein the main unit is electrically connected to the handle, the light source component is disposed in the main unit, and the dispersion component is disposed in the handle.

[0017] The optical path system proposed in this utility model includes a light source component, a light combining component, and a dispersion component. The light source component can emit multiple first laser beams of different wavelengths. After passing through the light combining component, the multiple first laser beams of different wavelengths are combined to form a second laser. The second laser is dispersed by the dispersion component to form multiple third laser beams of different wavelengths. The focal intervals of the third lasers of different wavelengths are located on the same straight line, so that the third lasers of different wavelengths can act on target areas at different depths, thereby achieving more effective three-dimensional layered treatment. Different depths can be treated simultaneously with one set of equipment, reducing treatment time and equipment costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of an embodiment of the optical path system provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of an embodiment of the light source component and light combining component in the optical path system provided by this utility model;

[0021] Figure 3 A schematic diagram of another embodiment of the light source component and light combining component in the optical path system provided by this utility model.

[0022] Explanation of icon numbers:

[0023] 10. Optical path system; 1. Light source assembly; 11. Laser emitter; 2. Beam combining assembly; 21. Fiber optic combiner; 22. Fiber optic cable; 23. Output connector; 24. Coupler; 3. Dispersion assembly; 31. Lens; 4. Collimation assembly; 5. Scanning motion assembly.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Using laser energy to treat biological tissue diseases is a common practice in laser therapy. To achieve layered treatment, the existing treatment methods generally fall into the following two categories:

[0029] One approach involves depositing multiple laser wavelengths onto biological tissue, exposing the tissue to a single-wavelength, multi-layered treatment through repeated treatment phases. The disadvantages of this method are its time-consuming nature, the need for multiple handheld devices with different wavelengths, and its high cost. Another approach uses a single-wavelength laser energy, passing it through a multifocal diffraction element and focusing lens to form multiple beams, which are then focused at specific locations from the emission point. This creates a three-dimensional layered focal lattice from a two-dimensional laser beam matrix, achieving layered treatment. However, this method uses multifocal diffraction elements with complex manufacturing processes, high costs, and poor versatility (applicable only to specific spot sizes and divergence angles). Furthermore, because a single wavelength of laser is used, its penetration ability into biological tissue is fixed. Although layered focusing is achieved through optical elements, significant energy attenuation occurs at deeper layers, resulting in poor treatment efficacy for deeper tissues.

[0030] This invention proposes an optical path system, a laser treatment handpiece, and a laser treatment device, aiming to enable different wavelengths of laser energy to act on target areas at different depths, thereby achieving more effective three-dimensional layered laser treatment.

[0031] Please see Figures 1 to 3In one embodiment of this utility model, the optical path system 10 is used for a laser treatment handpiece. The optical path system 10 includes a light source component 1, a light combining component 2, and a dispersion component 3. The light source component 1 is used to emit multiple first laser beams of different wavelengths. The light combining component 2 is used to receive multiple first laser beams of different wavelengths and combine them into a second laser beam. The dispersion component 3 receives the second laser beam, disperses it to form and output multiple third laser beams of different wavelengths, and makes the focal intervals of the multiple third laser beams lie on the same straight line.

[0032] In this embodiment, the light source component 1 can emit multiple first laser beams of different wavelengths. It can be a single laser designed or selected to achieve simultaneous output of multiple wavelengths, such as simultaneous output of 675nm / 1064nm / 1927nm, simultaneous output of 532nm / 755nm / 1064nm, or simultaneous output of 1440nm / 1550nm / 1927nm; or it can be multiple lasers with different wavelengths. By controlling the emission sequence of different wavelength laser energies, the laser energies of different wavelengths can be applied simultaneously or sequentially in time. The output of different wavelength lasers can also be independently controlled in terms of their output energy level, output frequency, and output pulse width. The light source component 1 only needs to be able to emit multiple first laser beams of different wavelengths. The specific implementation method is not further limited here.

[0033] In embodiments where the light source component 1 is a single laser, the light source component 1 is a single laser capable of simultaneously outputting multiple wavelengths. Different wavelengths of laser light can be output at different positions in its laser optical path system. These different wavelengths of laser light are superimposed within the single laser to obtain a mixed laser containing multiple wavelengths (i.e., a mixture of multiple first laser beams). For example, conventional monochromatic lasers typically filter out a certain wavelength in the upstream optical path in the downstream optical path. For instance, after a 1064nm laser passes through a frequency doubling crystal to generate a 532nm laser, the 1064nm laser before frequency doubling is filtered out. However, in this embodiment, the 1064nm laser is retained in the downstream optical path, allowing it to simultaneously output both 532nm and 1064nm lasers. Therefore, in this embodiment, the multiple first laser beams of different wavelengths emitted by the light source component 1 of the single laser are actually combined into one beam at the laser's light exit port, and then further homogenized and shaped by the beam combining component 2 downstream of the optical path.

[0034] The beam combining component 2 can couple multiple first laser beams into the same optical fiber 22, and then output a second laser beam through the optical fiber 22. Alternatively, it can use a spatial beam combining method, employing a combination of a reflector and multiple coupling mirrors 24, where multiple first laser beams are output as a second laser beam after passing through the reflector and multiple coupling mirrors 24. The dispersive component 3 can use a combination of multiple lenses 31 made of different materials. A second laser beam contains multiple first laser beams of multiple wavelengths. When multiple first laser beams of different wavelengths pass through the same lens 31 material, their refractive indices are different, resulting in different focal lengths, i.e., the focal point acts on different tissue layers, achieving the effect of three-dimensional layered treatment, reducing treatment time, saving treatment costs, and improving treatment effectiveness. The dispersive component 3 can also use a catadioptric lens 31 scheme or a diffractive lens 31 scheme to disperse a second laser beam into multiple third laser beams of different wavelengths and focal lengths, achieving the effect of three-dimensional layered treatment.

[0035] The optical path system 10 proposed in this utility model includes a light source component 1, a light combining component 2, and a dispersion component 3. The light source component 1 can emit multiple first laser beams of different wavelengths. After passing through the light combining component 2, the multiple first laser beams of different wavelengths are combined to form a second laser. The second laser beams are dispersed by the dispersion component 3 to form multiple third laser beams of different wavelengths. The focal intervals of the third laser beams of different wavelengths are located on the same straight line, so that the third laser beams of different wavelengths can act on target areas at different depths, thereby achieving more effective three-dimensional layered treatment. Different depths can be treated simultaneously with one set of equipment, reducing treatment time and equipment costs.

[0036] In an embodiment of this utility model, the dispersive component 3 includes a plurality of lenses 31, and the plurality of lenses 31 of different materials are arranged sequentially along the transmission direction of the second laser.

[0037] In this embodiment, to achieve layered focused treatment of biological tissues, the dispersive characteristics of different lens materials are fully utilized for laser beams with different wavelength combinations: different wavelength lasers have different refractive indices when passing through the same lens material, resulting in different focusing focal lengths. When designing the focusing lens 31, the dispersive characteristics of the lens material are fully utilized, aiming to maximize the axial chromatic aberration range. A large-range dispersive lens 31 is designed to achieve layered focusing; that is, in the beam propagation direction, the focal positions of different wavelength laser beams are different. The focal position of short-wavelength lasers is closer to the lens 31, the focal position of medium-wavelength lasers is in the center, and the focal position of long-wavelength lasers is farther from the lens 31, thereby achieving the goal of layered focused treatment by focusing different wavelength lasers to different depths of biological tissues. During the continuous iterative optimization of the lens 31 structure, parameters such as lens thickness, surface curvature, and spacing between lenses 31 can be appropriately adjusted to correct the spherical aberration of each monochromatic light, ensuring that the size and shape of the diffusion spot at the focal position of each wavelength laser meets the design requirements, thus optimizing the performance of the dispersive component 3.

[0038] In embodiments of this utility model, the materials of the plurality of lenses 31 are at least two of the following: crown glass, heavy flint glass, ultraviolet fused silica, sapphire crystal, or calcium fluoride crystal.

[0039] In this embodiment, to achieve a depth range for layered focusing, lenses 31 made of various materials can be combined based on the laser wavelength parameters emitted by the selected light source component 1. For example, crown glass and heavy flint glass can be combined, or ultraviolet fused silica, sapphire crystal, and calcium fluoride crystal can be combined. Alternatively, adjacent lenses 31 can be made of different materials; preferably, any two lenses 31 are made of different materials.

[0040] In an embodiment of this utility model, the light source assembly 1 includes multiple laser emitters 11 with different wavelengths, and the light combining assembly 2 includes an optical fiber combiner 21. One end of the optical fiber combiner 21 is connected to the multiple laser emitters 11 via optical fibers 22, and the other end of the optical fiber combiner 21 is connected to an output connector 23.

[0041] Multiple laser emitters 11 emit multiple first laser beams of different wavelengths, which are combined into a second laser beam via optical fiber 22 and optical fiber combiner 21, and then emitted from output connector 23.

[0042] In this embodiment, multiple laser emitters 11 emit multiple first laser beams of different wavelengths, which are then output to an optical fiber combiner 21 via optical fiber 22 for coupling and output of multiple wavelength lasers. A second laser beam is then output via optical fiber 22 and an output connector 23. This optical fiber 22 output method is convenient, flexible, and occupies little space. Furthermore, by combining the optical fibers and transmitting the second laser beam to the downstream optical path system, the light of different wavelengths is reflected multiple times within the optical fiber, achieving a uniform surface distribution of the beam. This ensures that the surface distribution and optical axis of the different wavelengths of light are completely aligned, allowing the multiple third laser beams dispersed in the subsequent dispersive assembly to maintain overlap along the optical axis. This avoids the center shift of the beam due to uneven beam surface distribution, ensuring that the multiple focal points are spaced out on the same straight line.

[0043] In an embodiment of this utility model, the light source assembly 1 includes multiple laser emitters 11 with different wavelengths, which emit multiple first laser beams with different wavelengths. The light combining assembly 2 includes multiple coupling mirrors 24, which emit multiple first laser beams with different wavelengths respectively, and then couple them into a second laser beam through the multiple coupling mirrors 24.

[0044] In this embodiment, multiple laser emitters 11 emit multiple first laser beams of different wavelengths, which are then directly output as a second laser beam after being combined with a reflector and multiple coupling mirrors 24. The method of using coupling mirrors 24 uses spatial transmission to achieve the coupling output of multiple first laser beams of multiple wavelengths. This method can withstand high-power laser output and is suitable for scenarios where higher energy is used for treatment.

[0045] In an embodiment of this utility model, the optical path system 10 further includes a collimation component 4, which is disposed between the beam combining component 2 and the dispersion component 3. The collimation component 4 is used to receive the second laser from the beam combining component 2, convert the second laser into a parallel beam, and then transmit it to the dispersion component 3.

[0046] In this embodiment, the collimating component 4 is disposed between the beam combining component 2 and the dispersion component 3. It receives the second laser beam and converts it into a parallel beam, effectively collimating the light and improving the beam quality and transmission stability of the second laser. A collimating lens 31 is used as the collimating component 4. Based on the refraction of the lens 31, its core function is to transform the light from each point in the aperture plate into a parallel collimated beam. Of course, the collimating component 4 can also employ Fresnel zone plates and phase plates for collimation.

[0047] In an embodiment of this utility model, the optical path system 10 further includes a scanning motion component 5, which is disposed between the collimation component 4 and the dispersion component 3. The scanning motion component 5 is used to receive the parallel beam from the collimation component 4, convert the parallel beam into an array of light spots, and transmit the array of light spots to the dispersion component 3.

[0048] In this embodiment, the scanning motion component 5 is positioned between the collimation component 4 and the dispersive component 3, enabling the parallel beam to form an array of light spots arranged in an array. This achieves laser energy scanning therapy within a certain area. Combined with the manual movement of the operator during treatment, it allows for flexible and free coverage treatment within the target treatment area, saving treatment time and improving treatment efficiency.

[0049] In the embodiments of this utility model, the scanning motion component 5 is a two-dimensional scanning motion component, specifically an XY galvanometer or two wedge-shaped mirrors at an angle, to convert the parallel beam into an array of light spots.

[0050] In this embodiment, an XY galvanometer system can be used as the scanning motion component 5, mainly composed of two reflectors capable of rapid angle deflection. These two reflectors are geometrically orthogonal and driven by an angle servo mechanism to control the laser beam to continuously scan along a set trajectory on the XY plane, thereby converting the parallel beam into a beam array and achieving laser energy scanning therapy within a certain area. Alternatively, two wedge-shaped mirrors at an angle can be used. When the two wedge-shaped prisms are used in series, the beam will be deflected twice by the independent rotation of each prism, allowing scanning in any direction within the range to form various scanning patterns, ultimately converting the parallel beam into a beam array and achieving laser energy scanning therapy within a certain area. It is understood that in other embodiments, two polyhedral lenses 31 with different numbers of facets can also be used in series. Rotating these lenses 31 can change the path of light passing through the lenses 31, thereby changing the deflection angle of the beam and forming various scanning patterns, ultimately converting the parallel beam into a beam array to achieve laser energy scanning therapy within a certain area.

[0051] In an embodiment of this utility model, the light source assembly 1 includes a single laser capable of simultaneously outputting multiple wavelengths.

[0052] In this embodiment, the light source component 1 can also be a single laser that can simultaneously output multiple wavelengths. The wavelength combination of the multiple first laser beams emitted by the single laser can be 675nm / 1064nm / 1927nm, 532nm / 755nm / 1064nm, or 1440nm / 1550nm / 1927nm. The selected multiple wavelengths can be wavelengths that are currently widely accepted for skin rejuvenation and pigmentation treatment, that is, wavelengths in the range of 14XXnm, 15XXnm, and 19XXnm are output simultaneously, or wavelengths of 675nm / 1064nm / 1927nm are output simultaneously, or wavelengths of 532nm / 755nm / 1064nm are output simultaneously.

[0053] This utility model also proposes a laser therapy device, including the optical path system 10, handle and main unit as described above, wherein the main unit is electrically connected to the laser therapy handle, the light source component 1 is disposed in the main unit, the dispersion component 3 is disposed in the handle, and a light guide structure, such as a light guide arm, may also be provided between the main unit and the laser therapy handle. The light combining component 2 may be partially or entirely disposed in the main unit, the light guide structure or the laser therapy handle.

[0054] In this embodiment, when the light source assembly 1 is a combination of multiple laser emitters 11, the multiple laser emitters 11 can be disposed outside the laser treatment handle and connected to the laser treatment handle via optical fiber 22 or otherwise to achieve laser transmission. The beam combining assembly 2 is disposed inside the laser treatment handle, and the dispersion assembly 3 can be disposed at the output port of the laser treatment handle to perform laser treatment on the patient. It can be understood that when the light source assembly 1 is a single laser emitter 11 capable of emitting multiple first laser beams, it can be disposed inside the laser treatment handle along with the beam combining assembly 2, and the dispersion assembly 3 can be disposed at the output port of the laser treatment handle to perform laser treatment on the patient.

[0055] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An optical path system for a laser therapy device, characterized in that, The optical path system includes: A light source assembly for emitting multiple first laser beams of different wavelengths; A beam combining component, wherein the beam combining component is used to receive multiple beams of the first laser of different wavelengths and combine the multiple beams of the first laser of different wavelengths into a single beam of the second laser; and A dispersion component receives the second laser, disperses the second laser to form and outputs multiple third laser beams of different wavelengths, and positions the focal intervals of the multiple third laser beams on the same straight line.

2. The optical path system as described in claim 1, characterized in that, The dispersive component includes multiple lenses, which are made of different materials and are arranged sequentially along the transmission direction of the second laser.

3. The optical path system as described in claim 2, characterized in that, The lenses are made of at least two of the following materials: crown glass, heavy flint glass, ultraviolet fused silica, sapphire crystal, or calcium fluoride crystal.

4. The optical path system as described in any one of claims 1 to 3, characterized in that, The light source assembly includes multiple laser emitters of different wavelengths, and the light combining assembly includes an optical fiber combiner. One end of the optical fiber combiner is connected to the multiple laser emitters via optical fibers, and the other end of the optical fiber combiner is connected to an output connector. Multiple laser emitters emit multiple beams of the first laser at different wavelengths, which are then combined into the second laser via the optical fiber and the optical fiber combiner, and emitted from the output connector.

5. The optical path system as described in any one of claims 1 to 3, characterized in that, The light source assembly includes multiple laser emitters of different wavelengths, which emit multiple beams of the first laser at different wavelengths. The light combining assembly includes multiple coupling mirrors, which emit multiple beams of the first laser at different wavelengths, and these beams are coupled together to form the second laser via the multiple coupling mirrors.

6. The optical path system as described in any one of claims 1 to 3, characterized in that, The optical path system further includes a collimation component, which is disposed between the beam combining component and the dispersion component. The collimation component is used to receive the second laser from the beam combining component, convert the second laser into a parallel beam, and then transmit it to the dispersion component.

7. The optical path system as described in claim 6, characterized in that, The optical path system further includes a scanning motion component, which is disposed between the collimation component and the dispersion component. The scanning motion component is used to receive the parallel beam from the collimation component, convert the parallel beam into an array of light spots, and transmit the array of light spots to the dispersion component.

8. The optical path system as described in claim 7, characterized in that, The scanning motion component is an XY galvanometer or two wedge-shaped mirrors at an angle, which converts the parallel beam into an array of light spots.

9. The optical path system as described in any one of claims 1 to 3, characterized in that, The light source assembly includes a single laser capable of simultaneously outputting multiple wavelengths.

10. A laser therapy device, characterized in that, The system includes an optical path system, a handle, and a host as described in any one of claims 1 to 9, wherein the host is electrically connected to the handle, the light source assembly is disposed in the host, and the dispersion assembly is disposed within the handle.

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