Method and system for reducing subcutaneous fat based on ultrafast laser

Abstract

The invention discloses a method for reducing subcutaneous fat based on ultrafast laser, which comprises the following steps: firstly, moving an optical focusing module to a specified position, then starting a laser source to emit ultrafast laser, carrying out dot matrix scanning at the current position to form dot matrix focal spot distribution, and ensuring that the peak power at the focal point is not lower than a multi-photon absorption threshold value; therefore, an optical breakdown or cavitation effect is generated, fat cells are mechanically destroyed, and non-invasive, accurate and controllable fat dissolution can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of biomedical laser technology, in particular to a method and system for reducing subcutaneous fat based on ultrafast laser. BACKGROUND

[0002] Fat removal technology is mainly used to improve local fat accumulation. Existing common fat removal technologies include invasive operations such as liposuction and fat resection, and non-invasive or minimally invasive operations such as cryolipolysis, laser lipolysis, radiofrequency lipolysis, and injection lipolysis. Among them, the invasive operation directly removes or destroys fat cells, which can achieve rapid improvement but may leave scars. The non-invasive or minimally invasive operation destroys fat cells and relies on the body's natural metabolism to expel them, which has less trauma and faster recovery.

[0003] However, most existing fat removal technologies rely on photothermal effect to achieve fat destruction or removal, which can easily cause thermal damage to surrounding tissues and further cause complications. Low-energy non-invasive methods have the problems of insufficient penetration depth and selectivity. SUMMARY

[0004] To solve some or all of the problems in the prior art, the present application provides a method for reducing subcutaneous fat based on ultrafast laser, comprising:

[0005] moving an optical focusing module to a specified position; and

[0006] starting a laser source to emit ultrafast laser, performing point-by-point scanning at the current position, forming a point-by-point focal spot distribution, and the peak power at the focal point is not less than the multi-photon absorption threshold, to produce optical breakdown or cavitation effect and mechanically destroy fat cells.

[0007] Further, the optical focusing module is moved to a specified position by a first scanning module, wherein the first scanning module comprises a multi-degree-of-freedom mechanical arm, or a gantry, or a three-axis platform, or a multi-dimensional platform.

[0008] Further, the optical focusing module comprises an adjustable lens group and is configured to focus the ultrafast laser to a specified depth of the skin to form a focal spot, wherein the diameter of the focal spot is 0.5 microns to 200 microns.

[0009] Further, the specified depth is 0 to 50 millimeters.

[0010] Further, the ultrafast laser comprises a pulse train, wherein each train comprises 2 to 200 sub-pulses, and the interval of the sub-pulses is 1 nanosecond to 100 nanoseconds; and

[0011] The center wavelength of the ultrafast laser is 300 nanometers to 3000 nanometers, and the pulse width is 1 femtosecond to 200 picoseconds.

[0012] Further, the ultrafast laser is transmitted to the optical focusing module through a light guide module or a free space optical path.

[0013] Further, the current position is scanned by a second scanning module, wherein the second scanning module comprises a fast mirror assembly and a galvanometer.

[0014] Further, the method further comprises:

[0015] The fat dissolving effect is detected and evaluated, and the focusing energy and / or scanning parameters are adjusted according to the fat dissolving effect.

[0016] Further, the detection and evaluation of the fat dissolving effect comprises:

[0017] An acoustic sensor and / or an optical sensor are used to send acoustic waves and / or light waves, and receive echoes to obtain photoacoustic imaging signals; and

[0018] The focus position and cavitation effect are determined based on the echoes or photoacoustic imaging signals to determine the fat dissolving effect.

[0019] Further, the method further comprises:

[0020] After the fat dissolving at the specified position is completed, the optical focusing module is moved to the next specified position, and the point array scanning is performed at the next specified position.

[0021] Further, the method further comprises:

[0022] The skin surface is cooled during the scanning interval.

[0023] Based on the method as described above, the second aspect of the present application provides a system for reducing subcutaneous fat based on an ultrafast laser, comprising:

[0024] A first scanning module is used to move the optical focusing module to a specified position;

[0025] An optical focusing module is arranged at the end of the first scanning module, and is used to focus the laser to a specified depth of the skin;

[0026] A second scanning module is used to perform point array scanning at the specified position to form a point array focal spot distribution.

[0027] Further, the first scanning module comprises a multi-degree-of-freedom mechanical arm, or a gantry, or a three-axis platform, or a multi-dimensional platform.

[0028] Further, the optical focusing module comprises an adjustable lens group.

[0029] Furthermore, the second scanning module includes a galvanometer assembly, which includes a reflector assembly and a one-dimensional or multi-dimensional micro-motion platform.

[0030] Furthermore, the system also includes:

[0031] The focus detection module is used to detect and evaluate the fat-dissolving effect.

[0032] Furthermore, the focus detection module includes:

[0033] A sensor, including an acoustic sensor and / or an optical sensor, wherein the acoustic sensor is configured to transmit sound waves and receive echoes, and the optical sensor is configured to transmit light waves and receive echoes; and

[0034] The computational submodule is communicatively connected to the sensor and is used to determine the focal position and cavitation effect based on the echo of the sound wave and / or light wave in order to determine the fat-dissolving effect.

[0035] Furthermore, the system also includes:

[0036] The control module is communicatively connected to the first scanning module, the ultrafast laser source, the second scanning module, and the focus detection module, and is used to control laser emission, and / or focus position, and / or scanning path, and / or pulse parameters, and to adjust the focus position, and / or scanning path, and / or pulse parameters based on the detection results of the focus detection module.

[0037] Furthermore, the system also includes:

[0038] A light guide module is disposed along the optical path between the ultrafast laser source and the optical focusing module, and is used to guide the laser to the optical focusing module.

[0039] Furthermore, the light guide module includes a light guide arm, or a hollow optical fiber, or a crystal optical fiber, or a conventional optical fiber.

[0040] This invention provides a method and system for reducing subcutaneous fat based on ultrafast laser. By using an ultrafast laser source and combining dual scanning control, it can selectively mechanically destroy the fat layer over a large area. The focus monitoring algorithm ensures safety and accuracy, enabling non-invasive, precise, and controllable fat dissolution.

[0041] It should be noted that this invention does not involve methods for diagnosing and treating diseases, but only provides medical-related information. The methods and systems are applied to beauty, not to the diagnosis and treatment of diseases. The corresponding diagnoses and treatments should be provided to users by hospitals / doctors. Attached Figure Description

[0042] To further illustrate the above and other advantages and features of the various embodiments of the present invention, a more specific description of the various embodiments of the present invention will be presented with reference to the accompanying drawings. It is to be understood that these drawings depict only typical embodiments of the invention and are therefore not intended to limit its scope. In the drawings, identical or corresponding parts will be indicated by identical or similar reference numerals for clarity.

[0043] Figure 1 This diagram illustrates a process flow of an ultrafast laser-based method for reducing subcutaneous fat according to an embodiment of the present invention.

[0044] Figure 2 This diagram illustrates the structure of a system for reducing subcutaneous fat based on ultrafast laser, according to an embodiment of the present invention.

[0045] Figure 3 This diagram illustrates a structural schematic of a method for reducing subcutaneous fat based on ultrafast laser, according to yet another embodiment of the present invention; and

[0046] Figure 4a and 4b The diagrams show a front view and a top view of a system for reducing subcutaneous fat based on ultrafast laser, according to another embodiment of the present invention. Detailed Implementation

[0047] In the following description, the invention is described with reference to various embodiments. However, those skilled in the art will recognize that the embodiments may be practiced without one or more specific details or with other alternatives and / or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail so as not to obscure the inventive points of the invention. Similarly, for illustrative purposes, specific quantities, materials, and configurations are set forth to provide a comprehensive understanding of embodiments of the invention. However, the invention is not limited to these specific details. Furthermore, it should be understood that the embodiments shown in the drawings are illustrative representations and are not necessarily drawn to scale.

[0048] In this specification, references to "an embodiment" or "this embodiment" mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment of the invention. The phrase "in one embodiment" appearing throughout this specification does not necessarily refer to the same embodiment in all instances.

[0049] It should be noted that the embodiments of the present invention describe the method steps in a specific order; however, this is only for illustrating the specific embodiment and not for limiting the order of the steps. On the contrary, in different embodiments of the present invention, the order of the steps can be adjusted according to actual needs.

[0050] Ultrafast lasers refer to lasers with pulse widths ranging from 1 fs to 200 ps. They possess high peak power and nonlinear multiphoton absorption effects, enabling mechanical destruction within the focused area with minimal thermal diffusion, thus making them suitable for liposuction techniques. To balance large-area coverage with selective destruction at the focal point, this invention provides a method and system for reducing subcutaneous fat based on ultrafast lasers. This method utilizes ultrafast laser pulses focused on the subcutaneous fat layer, employing a dual-system approach of robotic scanning and galvanometer scanning to achieve non-invasive, precise, and controllable fat dissolution.

[0051] The technical solution of the present invention will be further described below with reference to the accompanying drawings of the embodiments.

[0052] Figure 1 This diagram illustrates a flow chart of a method for reducing subcutaneous fat based on ultrafast laser, according to an embodiment of the present invention. Figure 1 As shown, a method for reducing subcutaneous fat based on ultrafast laser includes:

[0053] First, in step 101, the optical focusing module is moved. In one embodiment of the invention, the optical focusing module is moved to a designated position by the first scanning module, thereby enabling macroscopic positioning in various environments, such as above an operating table, in a planar XY space, or in three-dimensional space. In one embodiment of the invention, the first scanning module is a multi-degree-of-freedom robotic arm, and the optical focusing module is located at the end of the multi-degree-of-freedom robotic arm. By controlling the multi-degree-of-freedom robotic arm, the optical focusing module can be moved to a designated area according to a preset grid path, thereby achieving large-area coverage. In another embodiment of the invention, the first scanning module can also be a gantry, a three-axis platform, or a multi-dimensional platform, or other large-range movement control device. In one embodiment of the invention, the optical focusing module is used to focus the laser to a designated depth in the skin, i.e., the subcutaneous fat layer, to form a focal spot, wherein the diameter of the focal spot is 0.5 micrometers to 200 micrometers. The designated depth is determined according to different individuals, i.e., different parts of different individuals, and typically the depth of the subcutaneous fat layer is 0 to 50 millimeters.

[0054] Next, in step 102, a dot matrix scanning is performed. The laser source is activated to emit an ultrafast laser, which performs a dot matrix scan at the current location, forming a dot matrix focal spot distribution. The peak power at the focal point is not lower than the multiphoton absorption threshold, thereby generating optical breakdown or cavitation effects to mechanically destroy fat cells. In one embodiment of the invention, a second scanning module performs a dot matrix scan at the current location, wherein the second scanning module includes a fast reflector assembly and a galvanometer. As mentioned earlier, in one embodiment of the invention, an ultrafast laser is used for fat ablation. The ultrafast laser comprises pulse trains, each train containing 2 to 200 sub-pulses, with an interval of 1 nanosecond to 100 nanoseconds between sub-pulses. Simultaneously, the center wavelength of the ultrafast laser is 300 nanometers to 3000 nanometers, and the pulse width is 1 femtosecond to 200 picoseconds. In one embodiment of the invention, the peak laser power density at the focal point is 10... 9 Up to 10 17 W / cm 2 In one embodiment of the present invention, the ultrafast laser is transmitted to the optical focusing module via a light guide module or a free-space optical path. In one embodiment of the present invention, the light guide module is a light guide arm. In yet another embodiment of the present invention, the light guide module can also be a conventional optical fiber, hollow optical fiber, crystal optical fiber, etc.

[0055] Next, in step 103, the effect is evaluated. The fat-dissolving effect is detected and evaluated. If the fat-dissolving effect meets expectations, the process returns to step 101, and the optical focusing module is moved to the next designated position according to the preset path. If the fat-dissolving effect does not meet expectations, the process proceeds to step 104 to adjust parameters. In one embodiment of the present invention, the fat-dissolving effect is evaluated using an acoustic sensor and / or an optical sensor. Specifically, sound waves are sent through the acoustic sensor, and / or light waves are sent through the optical sensor, and then the echoes are received to obtain photoacoustic imaging signals. The focal position and cavitation effect are determined based on the echoes or photoacoustic imaging signals to determine the fat-dissolving effect. It should be understood that, in one embodiment of the present invention, after the current part is scanned, the process can also directly return to step 101 to proceed to the next part, and so on, until the fat-dissolving effect in each area of ​​the preset path has reached the expected target.

[0056] In step 104, adjust the parameters. Adjust the focused energy and / or scanning parameters according to the described fat-dissolving effect, and then proceed to step 102 to rescan at the current position.

[0057] In one embodiment of the invention, the skin surface is cooled during scanning intervals.

[0058] Based on the methods described above, the present invention also provides a system for reducing subcutaneous fat based on ultrafast laser, comprising a first scanning module, an optical focusing module, and a second scanning module. The first scanning module is used to move the optical focusing module to a designated position, the optical focusing module is used to focus the laser to a designated depth in the skin, and the second scanning module, independent of the first scanning module, performs a two-dimensional high-speed micro-scan of the laser focal spot after the first scanning module has been positioned.

[0059] In one embodiment of the present invention, the optical focusing module includes an adjustable lens group for focusing laser pulses onto the subcutaneous fat layer to form a focal spot with a diameter of 0.5 μm to 1.5 mm.

[0060] In one embodiment of the present invention, the system further includes a laser source, which can output laser pulses with a center wavelength of 300 nm to 3000 nm, the pulse width of the laser pulses being 1 fs to 200 ps, ​​and can be in pulse train or single pulse mode.

[0061] In one embodiment of the present invention, the system further includes a light guide module disposed along the optical path between the laser source and the optical focusing module, for transmitting the laser emitted by the laser source to the optical focusing module. In one embodiment of the present invention, the light guide module includes a light guide arm, a hollow optical fiber, a crystal optical fiber, or a conventional optical fiber. In yet another embodiment of the present invention, the laser emitted by the laser source can also be directly transmitted to the optical focusing module through a free-space optical path.

[0062] In one embodiment of the present invention, the system further includes a control module communicatively connected to the first scanning module, the laser source, and the second scanning module. The control module controls the on / off state of the laser source, pulse parameters, etc., thereby controlling laser emission. The control module also controls the first scanning module, enabling the optical focusing module to move along a preset path to a designated position, and adjusts the distance between the optical focusing module and the skin to adjust the focusing position. The control module further controls the second scanning module, thereby controlling dot matrix scanning.

[0063] In one embodiment of the present invention, the system further includes a focus detection module for detecting and evaluating the fat-dissolving effect. In one embodiment of the present invention, the focus detection module is communicatively connected to the control module, thereby adjusting the parameters and movements of the first scanning module, the laser source, and the second scanning module based on the detection results of the focus detection module. In one embodiment of the present invention, the focus detection module includes a sensor and a computational submodule, wherein the computational submodule is communicatively connected to the sensor and is used to determine the focus position and cavitation effect based on the detection results of the sensor, thereby determining the fat-dissolving effect. In one embodiment of the present invention, the sensor includes an acoustic sensor and / or an optical sensor, wherein the acoustic sensor is used to transmit sound waves and receive echoes, and the optical sensor is configured to transmit light waves and receive echoes.

[0064] In one embodiment of the present invention, the first scanning module includes a multi-degree-of-freedom robotic arm. Figure 2 This illustrates a system for reducing subcutaneous fat based on ultrafast lasers, employing a multi-degree-of-freedom robotic arm as the first scanning module. Figure 2 As shown, the system includes a multi-degree-of-freedom robotic arm 201, an optical focusing module 202, a galvanometer assembly 203, a light guide arm 204, and a laser source 205. The galvanometer assembly 203 is positioned forward in the optical path, and the optical focusing module 202 is positioned after the galvanometer assembly 203. The galvanometer assembly 203 serves as a second scanning module, including, for example, a mirror assembly and a one-dimensional or multi-dimensional micro-motion platform, and can be used to achieve rapid micro-motion scanning within a specified range. The galvanometer assembly 203 and the optical focusing module 202 are located at the first end of the light guide arm 204, and the position and angle of the optical focusing module 202 can be adjusted by the multi-degree-of-freedom robotic arm 201. The laser source 205 is located at the second end of the light guide arm 204 opposite to its first end. The laser emitted by the laser source 205 reaches the optical focusing module 202 via the light guide arm 204, and is then focused to a specified position by the optical focusing module 202.

[0065] In one embodiment of the present invention, the first scanning module includes a large-range movement control device such as a gantry, a three-axis platform, or a multi-dimensional platform. Figure 3 This illustrates a system for reducing subcutaneous fat based on ultrafast lasers, employing a multidimensional platform as the first scanning module. Figure 3As shown, the multi-dimensional mobile platform includes a base 301, a rotating base 302, a rotating platform 303, a first-direction (Z-axis) moving component 304, a second-direction (X-axis) moving component 305, and a third-direction (Y-axis) moving component 306. The base 301 is fixed to a table or ground surface. The rotating base 302 is disposed above the base 301 and includes a curved groove. The rotating platform 303 includes a first part 331 and a second part 332. The first part 331 is connected to the curved groove of the rotating base 302 and can rotate along the groove around the second direction (X-axis) and the third direction (Y-axis). The second part 332 is disposed above the first part 331 and can rotate relative to the first part 331 around its central axis (Z-axis). The first directional movement component 304 includes a first track 341 and a first slider 342. One end of the first track 341 is fixed to the rotating platform 303, and the first track 341 is parallel to the central axis of the rotating platform 303. The first slider 342 is mounted on the first track 341 and can slide along the first track 341. The second directional movement component 305 is connected to the first slider 342 and includes a second track 351 and a second slider 352. One end of the second track 351 is fixed to the first slider 342, and the second track 351 is perpendicular to the first track 341. The second slider 352 is mounted on the second track 351 and can slide along the second track 351. The third directional movement component 305 is connected to the second slider 352 and includes a third track and a third slider 362. One end of the third track is fixed to the second slider 352, and the third track is perpendicular to both the first track 341 and the second track 351. The third slider 362 is mounted on the third track and can slide along the third track. The galvanometer assembly 307 and the optical focusing module 308 are connected to the third slider 362, allowing them to translate along the X, Y, and Z axes and rotate around them. The galvanometer assembly 307 serves as a second scanning module, including, for example, a mirror assembly and a one-dimensional or multi-dimensional micro-motion platform, enabling rapid micro-motion scanning within a specified range. The laser light is transmitted to the galvanometer assembly 307 and the optical focusing module 308 via a light guide module such as the injection light guide arm 309.

[0066] Figure 4a and 4bThe figures show a front view and a top view of an ultrafast laser-based subcutaneous fat reduction system using a gantry as the first scanning module. As shown, the gantry includes a first moving track 401, a second moving track 402, and a third moving track 403. The first moving track 401 comprises two parallel tracks fixed to the ground. First supports 404 are respectively mounted on the two tracks, perpendicular to the first moving track 401 and movable along it in a first direction. The two ends of the second moving track 402 are fixed to the tops of the two first supports 404, allowing it to follow the first supports 404 and move along the first moving track 401 in the first direction. The third moving track 403 is movably connected to the second moving track 402 via second supports 405. The third moving track 403, driven by the second supports 405, moves along the second moving track 402 in a second direction, perpendicular to the first direction. The second scanning module 406 is movably connected to the third moving track 403, and can move along the third moving track 403 in a third direction, wherein the third direction is perpendicular to the first direction and the second direction. The optical focusing module 407 is connected to the end of the second scanning module 406. Based on this, the second scanning module 406 can drive the optical focusing module 407 to achieve three-dimensional movement and realize micro-scanning through its own structure.

[0067] It should be understood that in other embodiments of the present invention, the system may also employ other structures. For example, when a multi-degree-of-freedom robotic arm is used as the first scanning module, hollow optical fiber, crystal optical fiber, or conventional optical fiber may be used as the light guiding module, or the laser may be directly transmitted to the optical focusing module via a free-space optical path. In different embodiments, the structures of the second scanning module and the optical focusing module may also differ.

[0068] Although various embodiments of the invention have been described above, it should be understood that they are presented by way of example only and not as limitations. It will be apparent to those skilled in the art that various combinations, modifications, and alterations can be made without departing from the spirit and scope of the invention. Therefore, the breadth and scope of the invention disclosed herein should not be limited by the exemplary embodiments disclosed above, but should be defined solely by the appended claims and their equivalents.

Claims

1. A method for reducing subcutaneous fat based on ultrafast laser, characterized in that, include: Move the optical focusing module to the designated position; as well as The laser source is activated to emit an ultrafast laser, which scans the current location to form a dotted focal spot distribution. The peak power at the focal point is not lower than the multiphoton absorption threshold, so as to produce optical breakdown or cavitation effect and mechanically destroy fat cells.

2. The method as described in claim 1, characterized in that, The optical focusing module is moved to a designated position by the first scanning module, wherein the first scanning module includes: a multi-degree-of-freedom robotic arm, or a gantry, or a three-axis platform, or a multi-dimensional platform.

3. The method as described in claim 1, characterized in that, The optical focusing module includes an adjustable lens group and is configured to focus the ultrafast laser to a specified depth on the skin to form a focal spot, wherein the diameter of the focal spot is from 0.5 micrometers to 200 micrometers.

4. The method as described in claim 3, characterized in that, The specified depth is 0 to 50 millimeters.

5. The method as described in claim 1, characterized in that, The ultrafast laser comprises pulse trains, each train consisting of 2 to 200 sub-pulses, the interval between the sub-pulses being 1 nanosecond to 100 nanoseconds; as well as The ultrafast laser has a center wavelength of 300 nanometers to 3000 nanometers and a pulse width of 1 femtosecond to 200 picoseconds.

6. The method as described in claim 5, characterized in that, The ultrafast laser is transmitted to the optical focusing module via a light guide module or a free-space optical path.

7. The method as described in claim 1, characterized in that, A dot matrix scan is performed at the current location using a second scanning module, wherein the second scanning module includes a fast reflector assembly and a galvanometer.

8. The method as described in claim 1, characterized in that, Also includes: The fat-dissolving effect is detected and evaluated, and the focused energy and / or scanning parameters are adjusted based on the fat-dissolving effect.

9. The method as described in claim 8, characterized in that, The detection and evaluation of the fat-dissolving effect includes: Acoustic and / or optical waves are transmitted using acoustic and / or optical sensors, and the echoes are received to obtain photoacoustic imaging signals; and The focal position and cavitation effect are determined based on the echo or photoacoustic imaging signal to determine the fat-dissolving effect.

10. The method as described in claim 1, characterized in that, Also includes: After fat reduction at the designated location is completed, the optical focusing module is moved to the next designated location, and a dot matrix scan is performed at the next designated location.

11. The method as described in claim 1, characterized in that, Also includes: During the scanning intervals, the skin surface is cooled.

12. A system for reducing subcutaneous fat based on ultrafast laser, characterized in that, include: The first scanning module is configured to move the optical focusing module to a designated position; An optical focusing module is disposed at the end of the first scanning module and configured to focus the laser to a specified depth on the skin; The second scanning module is configured to perform dot matrix scanning at a specified location to form a dot matrix focal spot distribution.

13. The system as described in claim 12, characterized in that, The first scanning module includes: a multi-degree-of-freedom robotic arm, or a gantry, or a three-axis platform, or a multi-dimensional platform.

14. The system as described in claim 12, characterized in that, The optical focusing module includes an adjustable lens group.

15. The system as described in claim 12, characterized in that, The second scanning module includes a galvanometer assembly, which includes a reflector assembly and a one-dimensional or multi-dimensional micro-motion platform.

16. The system as claimed in claim 12, characterized in that, Also includes: The focus detection module is configured to detect and evaluate the fat-dissolving effect.

17. The system as claimed in claim 16, characterized in that, The focus detection module includes: A sensor, including an acoustic sensor and / or an optical sensor, wherein the acoustic sensor is configured to transmit sound waves and receive echoes, and the optical sensor is configured to transmit light waves and receive echoes; and The computational submodule, which is communicatively connected to the sensor, is configured to determine the focal position and cavitation effect based on the echo of the sound wave and / or light wave in order to determine the fat-dissolving effect.

18. The system as claimed in claim 16, characterized in that, Also includes: The control module is communicatively connected to the first scanning module, the ultrafast laser source, the second scanning module, and the focus detection module, and is configured to control laser emission, and / or focus position, and / or scanning path, and / or pulse parameters, and adjust the focus position, and / or scanning path, and / or pulse parameters based on the detection results of the focus detection module.

19. The system as claimed in claim 12, characterized in that, Also includes: A light guide module is disposed along the optical path between the ultrafast laser source and the optical focusing module, and is configured to guide the laser to the optical focusing module.

20. The system as described in claim 19, characterized in that, The light guide module includes a light guide arm, or hollow optical fiber, or crystal optical fiber, or conventional optical fiber.

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