Laser burning device

Abstract

The present invention discloses a laser burning device, which is characterized by comprising a laser emitting module 1, a constraint mirror assembly 2 and a burnt object positioning mechanism 3. The maximum energy of the light outlet of the laser emitting module 1 is greater than 180mJ, and the maximum radius of the light outlet is less than 2mm. The emitted laser is irradiated on the burnt object through the constraint mirror assembly 2; the constraint mirror assembly 2 is located on the optical path of the device, and ensures that the focal depth range of the optical path of the device is greater than 3mm; the burnt object positioning mechanism 3 is used to place the burnt object, and ensures that the burnt part of the burnt object is located within the focal depth range of the optical path of the device.

Description

Technical Field

[0001] The invention relates to a laser device, in particular to a laser burning device. Background Art

[0002] Laser liquid sample collection equipment is a medical device that uses a laser transmitter to emit a laser beam in a very short time, instantly generating high temperature on the skin tissue, burning and vaporizing a microhole, thereby achieving the purpose of collecting liquid samples.

[0003] Existing portable laser liquid sample collection equipment often requires consumables such as laser protective caps for focusing and positioning, which increases the cost of collecting a single liquid sample. In addition, the laser protective cap needs to be installed when collecting liquid samples. After laser burning is completed, the liquid sample may be contaminated on the laser protective cap, so it needs to be treated as medical waste, which is still not convenient to use. Summary of the invention

[0004] In order to solve at least one of the above technical problems, an object of an embodiment of the present invention is to provide a laser ablation device.

[0005] In order to achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0006] A laser cauterization device,

[0007] The invention is characterized in that it comprises a laser emission module, a constraint mirror assembly and a burnt object positioning mechanism.

[0008] The maximum energy of the light outlet of the laser emission module is greater than 180mJ, and the maximum radius of the light outlet is less than 2mm. The emitted laser is irradiated onto the object to be burned through the constraining mirror assembly;

[0009] The constraining mirror assembly is located on the optical path of the device and ensures that the focal depth range of the optical path of the device is greater than 3 mm;

[0010] The burnt object positioning mechanism is used to place the burnt object and ensure that the burnt portion of the burnt object is located within the focal depth range of the optical path of the device.

[0011] The embodiment of the present invention provides a laser ablation device, which can complete the liquid sample collection function without the need for consumables such as laser protective caps, while reducing medical waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the simplified structure of a laser burning device provided in an embodiment of the present invention;

[0013] Figure 2 is a schematic diagram of the relative positions of laser optical devices provided by an embodiment of the present invention;

[0014] Figure 3 It is a front view and a side view of the optical path adjustment mechanism provided by an embodiment of the present invention;

[0015] Figure 4 is a three-dimensional diagram of a closed state of the optical path adjustment mechanism provided by an embodiment of the present invention;

[0016] Figure 5 is a stereoscopic diagram of an open state of the optical path adjustment mechanism provided by an embodiment of the present invention;

[0017] Figure 6 is a longitudinal cross-sectional view of an optical path adjustment mechanism provided by an embodiment of the present invention;

[0018] Figure 7 is a transverse cross-sectional view of an optical path adjustment mechanism provided by an embodiment of the present invention;

[0019] Figure 8 is a schematic diagram of a closed optical path anti-fouling structure provided by an embodiment of the present invention;

[0020] Fig. 9 It is a three-dimensional view and a cross-sectional view of a semi-open cavity structure provided by an embodiment of the present invention.

[0021] The following are marked in the figure:

[0022] 1-Laser emission module; 2-Constraint mirror assembly; 3-Burned object positioning mechanism;

[0023] 4-main housing; 5-opening on the main housing; 6-displacement adjustment rod on the burnt object positioning mechanism;

[0024] 7- The burnt object limiting structure on the displacement adjustment rod;

[0025] 8-Ball-shaped set screw on the displacement adjustment rod;

[0026] 9- A groove inside the main housing that matches the ball-type set screw;

[0027] 10- Anti-fouling mirror assembly;

[0028] 11-a semi-open cavity formed by a closed structure between the light-through hole in which the dirt-sealing mirror assembly is embedded and the burned part of the burned object;

[0029] 12-Anti-fouling lens on the anti-fouling mirror assembly;

[0030] 13-Threaded structure on the inner wall of the semi-open cavity. DETAILED DESCRIPTION

[0031] The laser liquid sample collection device is a medical device that uses a laser transmitter to emit a laser beam with a wavelength of 2.94μm in a very short time, instantly generating high temperature on the skin tissue, burning and vaporizing a microhole, thereby achieving the purpose of collecting liquid samples.

[0032] The existing portable laser liquid sample collection equipment must use a laser protective cap because:

[0033] Existing portable laser liquid sample collection equipment requires precise focusing and positioning for liquid sample collection. For example, a finger is placed on a laser protective cap to facilitate positioning of the fingertip at the focal point, penetrating the surface skin, and performing cauterization and vaporization.

[0034] Although the laser protective cap in the existing portable laser liquid sample collection equipment has a focusing function, it increases the cost of collecting a single liquid sample. In addition, the laser protective cap needs to be installed when collecting liquid samples. After the laser burning is completed, the liquid sample may be contaminated on the laser protective cap, so it needs to be treated as medical waste, which is still not convenient to use.

[0035] The basic concept of the present invention is to replace the focusing function of the laser protective cap with a long focal depth design, thereby achieving the purpose of eliminating the laser protective cap.

[0036] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0037] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] like Figure 1 As shown, the present invention is a laser burning device.

[0039] It is characterized by comprising a laser emission module 1, a constraint mirror assembly 2 and a burnt object positioning mechanism 3.

[0040] The maximum energy of the light outlet of the laser emission module 1 is greater than 180mJ, and the maximum radius of the light outlet is less than 2mm. The emitted laser is irradiated onto the object to be burned through the confinement mirror assembly 2;

[0041] This design ensures that the laser energy focused within the focal depth range is sufficient to burn through the dermis and complete the liquid sample collection function.

[0042] The constraining mirror assembly 2 is located on the optical path of the device and ensures that the focal depth range of the optical path of the device is greater than 3 mm;

[0043] like Figure 1 , Figure 2As shown, the laser emitted by the laser emission module 1 is sequentially irradiated onto the object to be burned through the constraint mirror assembly 2; here, the constraint mirror assembly 2 only shows the relevant lenses, and does not show the relevant component structure;

[0044] The constraining mirror assembly 2 is mainly used to extend the focal depth of the device to ensure that the focal depth range of the optical path of the device is greater than that of the existing portable laser liquid sample collection equipment.

[0045] This is because when the portable laser liquid sample collection equipment no longer uses a laser protective cap, if there is no other device to ensure the focusing function, a slight deviation will cause the laser spot to expand rapidly, and the energy will no longer be focused on a very small range. The energy dispersion will easily lead to the inability to burn and vaporize the skin, resulting in the inability of the liquid sample to flow out and the inability to complete the liquid sample collection.

[0046] In order to solve the problem that the distance range of the burned object is too small when the portable laser is used to collect effective liquid samples, we have carefully designed and used the long focal depth design of the laser burning device to replace the positioning function of the existing laser protective cap, and the burning of the burned object can be relatively freely adjusted within the focal depth range of the device's optical path, thereby providing a better user experience.

[0047] Since the skin is composed of the epidermis and dermis, the total thickness is between 0.5mm-4mm, with an average of more than 1mm. The epidermis on the fingers is a thick, hairless epidermis, which is composed of the stratum corneum, the clear layer, the granular layer and the germinal layer. The melanin produced by the germinal layer determines the color of the skin. The entire epidermis is avascular and gray and translucent, with a thickness of 0.066mm-0.178mm. The dermis is composed of the papillary layer and the reticular layer, with a large number of microvessels, lymphatic vessels and nerve endings. The dermis does not contain melanin and is white and opaque, with a thickness of 0.4mm-4mm.

[0048] Therefore, only when the incision made by the laser penetrates deep into the dermis tissue can it cut open the micro-blood vessels in the dermis to allow the liquid sample to flow out.

[0049] Based on the maximum thickness of 4 mm, in order to achieve liquid sample collection, the laser spot must be as small as possible within the 4 mm thickness, and this range should be within the focal depth range.

[0050] Here, the focal depth is defined as the distance between two axial coordinates when the axial intensity drops to 1 / 2 of the central intensity,

[0051] That is, DOF=2|ZR|, ZR=M2*(f*f)*a / (2*pi*(r*r)),

[0052] Where ZR is the Rayleigh length, M2 is the beam quality factor, f is the focal length of the lens group, a is the laser wavelength, and r is the spot radius of the lens incident surface. The size of M2 is 7.69, the size of a is 2.94μm, and the size of r is 0.43mm.

[0053] It can be calculated from the above formula that f≥14.336mm, so when designing the lens group, the focal length range should be f≥14.336mm to ensure the focal depth requirement for liquid sample collection.

[0054] Through such a design scheme, the focal depth of the portable laser liquid sample collection equipment has increased from the traditional less than 0.5mm to greater than 4mm, and the focal depth has increased by more than 8 times, thereby greatly broadening the range of liquid sample collection, effectively reducing the probability of liquid samples failing to flow out, and greatly improving the product's fault tolerance.

[0055] In addition to the above-mentioned telephoto focusing lens similar design, the design method of long focal depth also includes but is not limited to the following methods:

[0056] 1. Conical mirror;

[0057] 2. Binary diffraction element;

[0058] 3. Use multiple reflections to lengthen the light path to extend the focal depth.

[0059] The burnt object positioning mechanism 3 is used to place the burnt object and ensure that the burnt portion of the burnt object is located within the focal depth range of the optical path of the device.

[0060] With the same design concept as the constraining mirror assembly 2, the burnt object positioning mechanism 3 places the burnt object on the optical path with extended focal depth, so that the burnt object can be effectively burnt and vaporized; and the burnt object can be placed flexibly and freely within the focal depth range of the optical path of the device, and has a high liquid sample collection success rate within 1.5 times the focal depth.

[0061] For further information, see Figure 3 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0062] It is characterized in that

[0063] The constraining mirror assembly 2 has a positive optical focal length, and its clear aperture is less than 10 mm, so that the spot radius at the light waist of the device is less than 0.7 mm.

[0064] Through a large number of clinical experiments, we have confirmed that in order to burn and vaporize to form micropores and achieve the purpose of liquid sample collection, the spot radius at the light waist needs to be less than 0.7mm.

[0065] The specific experimental design is as follows.

[0066] Here we divide the energy into 5 levels, and people with different skin thicknesses into 5 levels. The energy from low to high corresponds to the skin thickness from thin to thick. Because the number of people who can cooperate in clinical work is limited, 200 burning experiments are conducted at each level, and experiments are conducted on two devices that are identical except for the spot radius at the light waist. The spot radius at the light waist is 0.69mm and the spot radius is 0.71mm respectively. A total of 5*2*200=2000 burning experiments are conducted.

[0067] Under normal use conditions, when the spot radius at the light waist is 0.69mm, 991 out of 1000 experiments successfully vaporized to form micropores and achieved the purpose of liquid sample collection, with a success rate of 99.1%. However, when the spot radius at the light waist is 0.71mm, only 873 out of 1000 experiments were successful, with a success rate of only 87.3%.

[0068] Therefore, we determined that the positive optical power of the constraining mirror should make the spot radius at the optical waist of the device less than 0.7mm.

[0069] For further information, see Figure 3 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0070] It is characterized in that the lens surface of the constraint mirror assembly 2 close to the light waist of the device is a plane, and the lens surface away from the light waist of the device is a convex surface.

[0071] The lens surface of the constraint mirror assembly 2 close to the optical waist of the device is a plane, and the lens surface far from the optical waist of the device is a convex surface. The emitted laser is beam-contracted within the effective aperture range of the constraint mirror assembly 2 to reduce the spot radius at the optical waist of the laser. In addition, the first surface of the constraint mirror assembly 2 is a convex surface and the second surface is a plane, which is conducive to a smoother beam contraction of the laser, thereby further reducing the spot radius at the optical waist of the laser.

[0072] For further information, see Figure 3 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0073] It is characterized in that

[0074] The distance between the object positioning mechanism 3 and the light outlet of the laser emitting module 1 is adjustable.

[0075] The distance between the burnt object positioning mechanism 3 and the light outlet of the laser emitting module 1 is adjustable, which means that the optical path length of the device can be freely adjusted within a certain range, so that the burnt object can be burned at the accurate designed position after being adjusted.

[0076] For further information, see Figure 3 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0077] The main housing 4 is provided with an opening 5 for accommodating the relative displacement of the object positioning mechanism 3. The laser emission module 1 and the constraint mirror assembly 2 are fixed inside the housing and the relative distance from the opening 5 remains unchanged.

[0078] It is characterized in that the burnt object positioning mechanism 3 comprises

[0079] More than one displacement adjustment rod 6, and the light emitting direction of the device is parallel to the displacement direction of the displacement adjustment rod 6;

[0080] In this way, it can be ensured that the laser beam and the displacement direction of the displacement adjustment rod 6 (including the right adjustment rod and the left adjustment rod in the figure) are not tilted and are focused at the designed position. By limiting the liquid sample collection point (that is, near the focus of the optical path of the device) in the horizontal and vertical dimensions, the accuracy of the liquid sample collection position is improved, thereby improving the success rate of liquid sample collection.

[0081] The displacement adjustment rod 6 (including the right adjustment rod and the left adjustment rod in the figure) includes a burnt object limiting structure 7 for limiting the placement position of the burnt object.

[0082] When the displacement adjustment rod 6 is pulled out from the main housing 4 (in the figure, it is divided into an upper main housing and a lower main housing) (the schematic diagram before being pulled out is as shown in FIG. Figure 4 , the extraction status is as follows Figure 5 As shown in FIG. 1 ), the center point of the burnt object limiting structure 7 on the displacement adjustment rod 6 is located within the focal depth range of the optical path of the device.

[0083] For further information, see Figure 6 and Figure 7 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0084] It is characterized in that the displacement adjustment rod 6 includes more than one ball-shaped set screw 8, and the main housing 4 includes a groove 9 matched with the ball-shaped set screw 8.

[0085] Here, the groove has a radius of 2.5mm, a depth of 2mm, and a length of 14mm. The end face of the ball-shaped set screw 8 is a ball with a radius of 2.5mm. The ball is 2mm higher than the step surface of the screw. There is a spring inside the ball-shaped set screw 8 to hold the ball. In this way, the displacement adjustment rod 6 needs to overcome the elastic force of the ball-shaped set screw 8 during the displacement process. At the same time, it can stop quickly and accurately when it moves to the groove 9, so as to achieve the purpose of level adjustment and positioning.

[0086] In addition, the design of the ball-end set screw 8 and the groove 9 matching the ball-end set screw 8 has the advantages of lower cost and easier implementation compared to other designs.

[0087] The pre-tightening force of the ball-pin set screw 8 and the groove 9 is greater than 0.1 Newton. Since the skin thickness of different people is different, under the design concept of replacing the focusing function of the laser protective cap with a long focal depth, the main shell 4 includes a groove 9 that cooperates with the ball-pin set screw 8, which cooperates with one or more ball-pin set screws 8 on the displacement adjustment rod 6, so that the distance between the center point of the burned object limiting structure 7 on the displacement adjustment rod 6 and the light outlet of the laser emission module 12 meets the optical path length design requirements of the long focal depth, and has a multi-level adjustment function, which can meet the liquid sample collection needs of people with different skin thicknesses at different gears.

[0088] The displacement adjustment rod 6 has a displacement adjustment level of not less than 0.5 mm in the light emitting direction, so that the number of levels of optical path length adjustment is reasonable and convenient for all types of users.

[0089] And the pre-tightening force at each level positioning point is greater than 0.5 Newton, so that each level can be firmly fixed, which is convenient for positioning during liquid sample collection.

[0090] For further information, see Figure 3 and Figure 5 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device also includes a main housing 4,

[0091] It is characterized in that

[0092] The burnt object limiting structure 7 is a groove with a depth of 5 to 9 mm, a radius of 9 to 13 mm, and a width of 20 to 25 mm.

[0093] The optimal limit mechanism for the burned object here is a 7mm deep groove on the displacement adjustment rod 6, with an approximate radius of 11mm and a width of 22.5mm. The diameter of a human finger is generally 13mm to 22mm, which is convenient for accommodating a human finger in this groove, making it difficult for the finger to move and facilitating liquid sample collection.

[0094] For further information, see Figure 3 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0095] It is characterized in that the constraint mirror component 2 is coated with a combined film layer of laser band anti-reflection and white light band anti-reflection at both ends of the constraint mirror component 2 through a vacuum deposition coating process.

[0096] The constraint mirror assembly 2 is coated with a combined film layer of laser band anti-transmission and white light band anti-reflection at both ends of the constraint mirror assembly 2 through a vacuum deposition coating process. In this way, the laser energy loss is reduced by coating the combined film layer, so that the laser energy can be utilized to the maximum extent and can burn and vaporize micropores to achieve the purpose of burning holes and facilitating liquid sample collection. Compared with traditional coating technology, the vacuum deposition coating process can obtain a high-density, high-bonding coating and can be processed at low temperature, so as not to affect the substrate performance of the parts.

[0097] For further information, see Figure 8 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0098] It is characterized in that an anti-fouling mirror assembly 10 is also included in the optical path between the constraining mirror assembly 2 and the object to be burned, the center of which is more than 4 mm away from the optical waist of the device, and the radius of the light hole is less than 10 mm.

[0099] This design is adopted because, in windless conditions, as long as the distance between the burning site and the optical device on the light path exceeds a certain length, the burnt material will often not adhere to the surface of the anti-fouling mirror and will not affect the use of the entire laser device.

[0100] Moreover, more than 99% of the skin is carbohydrates, and there is basically no residue after burning. The vaporized floating matter has a certain probability of vaporizing into smaller particles during the laser burning process. Even if it temporarily adheres to the surface of the anti-fouling mirror, there is a certain probability that it will be vaporized again, and then float to other places, and no longer affect the use of the entire laser device.

[0101] Through our extensive burning experiments on pig skin, we confirmed that the vaporized burnt material only floats and adheres to a small area.

[0102] The specific experimental design is as follows.

[0103] Here we divide the energy into 5 levels, conduct 3000 pig skin burning experiments in each level, and conduct the experiments in 5 identical devices respectively, for a total of 5*5*3000=75000 burning experiments.

[0104] In the absence of wind and the most serious pollution situation, the average laser energy at the burned part only changed from 180mJ to 178mJ, and the light intensity only dropped by 1.11%, which basically had no effect on the burning.

[0105] Therefore, we believe that when the center of the light hole of the anti-fouling mirror is more than 4mm away from the light waist of the device, the floating objects after burning will basically not affect the laser burning.

[0106] Therefore, when the anti-fouling mirror assembly 10 is far enough away from the burning point of the object to be burned and the radius of the light hole of the anti-fouling mirror assembly 10 is small enough, the vaporized burnt material will basically not contaminate or damage various devices in the laser optical path, including lenses, resonant cavities, etc., thereby ensuring the reliability of the laser burning device.

[0107] The radius of the light hole of the anti-fouling mirror assembly 10 is less than 10 mm. This is because the anti-fouling mirror assembly 10 is surrounded by a closed structure near the light hole. If floating objects fall on the closed structure, it will not affect the use of the optical device. The radius of the light hole should be as small as possible, so that the probability of floating objects falling on the light hole is relatively small. Even if they fall on the light hole, the impact will be small due to the limited area.

[0108] For further information, see Fig. 9 As a specific embodiment of the laser burning device provided by the present invention, the laser burning device,

[0109] The invention is characterized in that a semi-open cavity 11 is formed by a closed structure between the light-through hole of the anti-fouling mirror assembly 10 and the burned part of the object to be burned, and one end of the light-through hole is closed by an anti-fouling lens 12 on the anti-fouling mirror assembly 10;

[0110] The inner wall of the semi-open cavity 11 is a threaded structure 13 or an annular toothed structure.

[0111] This design idea is similar to a labyrinth seal. A labyrinth seal generally has several annular sealing teeth arranged in sequence around the rotating shaft, and a series of intercepting gaps and expansion cavities are formed between the teeth. When the sealed medium passes through the gaps of the tortuous labyrinth, a throttling effect is generated to achieve the purpose of preventing leakage.

[0112] The inner wall of the semi-open cavity 11 is a threaded structure 13 or an annular toothed structure, which is equivalent to a half labyrinth seal structure, that is, there are no rotating parts here, and the fixed parts are equivalent to having many tortuous chambers, and the friction effect, flow contraction effect and air permeability effect similar to the labyrinth seal structure will prevent floating pollutants from entering the semi-open cavity 11, thereby achieving the purpose of reducing floating pollutants.

[0113] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A laser burning device, Features It comprises a laser emission module (1), a constraining mirror assembly (2) and a burnt object positioning mechanism (3). The maximum energy of the light outlet of the laser emission module (1) is greater than 180 mJ, and the maximum radius of the light outlet is less than 2 mm. The emitted laser is irradiated onto the object to be burned through the confinement mirror assembly (2); The constraining mirror assembly (2) is located on the optical path of the device and ensures that the focal depth range of the optical path of the device is greater than 3 mm; The burnt object positioning mechanism (3) is used to place the burnt object and ensure that the burnt portion of the burnt object is located within the focal depth range of the optical path of the device; An anti-fouling mirror assembly (10) is also included in the optical path between the constraining mirror assembly (2) and the object to be burned, the center of which is more than 4 mm away from the optical waist of the device, and the radius of the light aperture is less than 10 mm; A semi-open cavity (11) is formed by a closed structure between the light-through hole of the anti-fouling mirror assembly (10) and the burned part of the object to be burned, and one end of the light-through hole is closed by an anti-fouling lens (12) on the anti-fouling mirror assembly (10). The inner wall of the semi-open cavity (11) is a threaded structure (13) or an annular toothed structure.

2. A laser ablation device as claimed in claim 1, It is characterized in that The constraining mirror assembly (2) has a positive optical focal length and a light aperture of less than 10 mm, so that the spot radius at the light waist of the device is less than 0.7 mm.

3. A laser ablation device as claimed in claim 2, It is characterized in that The lens surface of the constraining mirror assembly (2) close to the light waist of the device is a plane, and the lens surface away from the light waist of the device is a convex surface.

4. A laser ablation device as claimed in claim 1, It is characterized in that The distance between the burnt object positioning mechanism (3) and the light outlet of the laser emission module (1) is adjustable.

5. A laser ablation device as claimed in claim 1, The main housing (4) is provided with an opening (5) for accommodating the burning object positioning mechanism (3) for relative displacement. The laser emission module (1) and the constraint mirror assembly (2) are fixed inside the housing and the relative distance from the opening (5) remains unchanged. It is characterized in that The burnt object positioning mechanism (3) comprises one or more displacement adjustment rods (6), and the light emitting direction of the device is parallel to the displacement direction of the displacement adjustment rods (6); the displacement adjustment rods (6) comprise a burnt object limiting structure (7) for limiting the placement position of the burnt object; when the displacement adjustment rods (6) are withdrawn from the main housing (4), the center point of the burnt object limiting structure (7) on the displacement adjustment rods (6) is located within the focal depth range of the optical path of the device.

6. A laser ablation device as claimed in claim 5, It is characterized in that The displacement adjustment rod (6) includes one or more ball-jointed set screws (8), and the main housing (4) includes a groove (9) inside that matches the ball-jointed set screw (8). The pre-tightening force of the ball-jointed set screw (8) and the groove (9) is greater than 0.1 Newton.

7. A laser ablation device as claimed in claim 6, It also includes a main housing (4), It is characterized in that The burnt object limiting structure (7) is a groove with a depth of 5 to 9 mm, a radius of 9 to 13 mm, and a width of 20 to 25 mm.

8. A laser ablation device as claimed in claim 1, It is characterized in that The confinement mirror component (2) is coated with a combined film layer for laser waveband transmission enhancement and white light waveband reflection enhancement at both ends of the confinement mirror component (2) by a vacuum deposition coating process.

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