Glass laser polishing method
By combining high-temperature preheating and multi-directional laser scanning, the problem of trajectory marks in glass polishing has been solved, achieving high-quality, pollution-free glass polishing suitable for both flat and curved surfaces.
Patent Information
- Application Number
- CN202511278360.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-08
- Publication Date
- 2025-12-26
AI Technical Summary
Existing glass polishing methods suffer from trajectory marks, resulting in high surface roughness. Furthermore, traditional mechanical and chemical polishing methods are harmful to health and the environment, making it difficult to improve polishing quality.
A method combining high-temperature preheating with multi-directional laser scanning is used to control the laser line spacing and scanning direction. The high temperature softens the glass surface and the surface tension is used to smooth the surface. Multi-directional scanning interweaves the scanning trajectory to eliminate the trajectory imprint.
It significantly reduces the roughness of glass polished surfaces, achieving a high-quality polishing effect without texture or deformation, and is safe and pollution-free, thus expanding the application range of laser polishing methods.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the polishing technical field, in particular to a glass laser polishing method. BACKGROUND
[0002] When processing products such as display panels, mobile phone display screens, mobile phone back cover plates and vehicle windows, a large piece of glass is generally processed by cutting, polishing, heat bending, tempering and cleaning processes. Among them, the commonly used cutting is to process the shape by using a CNC drill bit. After CNC processing, the straight body position (the surface to be polished) of the glass is rough and has certain microcracks, so the straight body position after CNC processing is polished to be transparent and bright by using a brush and polishing medium, and the microcracks are removed. The polishing medium commonly used in these mechanical and chemical polishing methods is a certain concentration of alumina and cerium oxide powder water. The inhalation of the polishing medium poses a certain risk to the health of the operator, easily pollutes the environment, and the polishing yield also needs to be improved. Although the new laser polishing method is safe and pollution-free, it is easy to leave micro-texture or uneven marks, i.e. track marks, on the surface of the glass material during laser scanning, resulting in a high roughness of the glass material surface and reducing the polishing quality. SUMMARY
[0003] Therefore, it is necessary to provide a glass laser polishing method which can inhibit the formation of track marks on the polished surface of the glass, reduce the roughness, and further improve the polishing quality.
[0004] In one aspect of the present application, a glass laser polishing method is provided, comprising the following steps:
[0005] Preheating the glass, wherein the preheating temperature is 350℃-650℃;
[0006] Performing multiple laser scans on the preheated glass in different scanning directions, wherein the included angle between the scanning directions of two adjacent laser scans in the multiple laser scans is 30°-120°, and the laser line spacing of the laser scan is 0.1mm-1mm.
[0007] The polishing method combines high-temperature preheating and multi-direction scanning, and precisely controls the laser line spacing, thereby suppressing the track imprint defects commonly existing in traditional laser polishing, greatly reducing the roughness of the polished glass surface, significantly weakening the concave-convex feeling on the microscopic morphology, and making the glass obviously transparent, without texture and deformation, thereby achieving high-quality polishing effect. The temperature of the preheating treatment is controlled at 350℃-650℃ to soften the glass surface microscopically, and the molten area generated by laser scanning is self-flowed and flattened under the action of surface tension, which is beneficial to fill the microscopic undulations at the edges of the scanning lines and eliminate the bright-dark texture caused by uneven energy. The angle between the scanning directions of the adjacent two laser scans in the multiple laser scans is 30°-120°, which destroys the periodic energy distribution of single-direction scanning, makes the scanning tracks in different directions interweave, and breaks down the basis for forming track imprints such as parallel stripes and grid imprints, thereby suppressing the generation of track imprints. The laser line spacing of the laser scanning is controlled at 0.1mm-1mm, which can improve the scanning overlap rate, reduce the un-melted gullies caused by incomplete coverage, and is beneficial to the continuous and uniform distribution of energy on the plane or curved surface.
[0008] The polishing method expands the application range of the laser polishing method and still has outstanding polishing effect on curved surfaces.
[0009] In some embodiments, the glass laser polishing method satisfies at least one of the following conditions:
[0010] (1) the angle between the scanning directions of the adjacent two laser scans in the multiple laser scans is 45°-90°;
[0011] (2) the laser line spacing of the laser scanning is 0.1mm-0.2mm;
[0012] (3) the temperature of the preheating treatment is 450℃-550℃.
[0013] In some embodiments, the number of scans of the multiple laser scans is 3-10 times.
[0014] In some embodiments, the surface to be polished of the glass is a curved surface, the preheated glass is rotated during the laser scanning, and the incident direction of the laser beam is always perpendicular to the surface to be polished of the glass.
[0015] In some embodiments, the surface to be polished of the glass is an arc-shaped curved surface, the radius of curvature of the arc-shaped curved surface is 200mm-1000mm, and the rotation speed of the glass is 5mm / s-25mm / s.
[0016] In some embodiments, the surface to be polished of the glass is a cylindrical surface, the radius of the cylindrical surface is 5mm-100mm, and the rotation speed of the glass is 20mm / s-400mm / s.
[0017] In some embodiments, the scanning speed of the laser scanning is 10mm / s-500mm / s.
[0018] In some embodiments, the scanning width of the laser scanning is 3mm-10mm.
[0019] In some embodiments, the holding time of the pre-heating treatment is 5min-30min.
[0020] In some embodiments, the laser used in the laser scanning comprises at least one of CO2 continuous laser, infrared laser, ultraviolet laser and fiber laser. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is a schematic view of the laser incidence direction.
[0022] Figure 2 is a schematic view of the laser scanning direction.
[0023] Figure 3 is a view of the appearance of the glass after laser polishing in Example 1.
[0024] Figure 4 is a microscopic morphology view of the glass after laser polishing in Example 1.
[0025] Figure 5 is a microscopic morphology view of the cross section of the glass after original CNC machining in Example 1.
[0026] Figure 6 is a microscopic morphology view of the collapse deformation of the glass in Comparative Example 2.
[0027] Figure 7 is a view of the appearance of the glass after laser polishing in Comparative Example 4. DETAILED DESCRIPTION
[0028] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0030] Laser polishing is a non-contact polishing method, which uses a continuous laser beam to scan the surface of a glass substrate at a high speed. The surface is smoothed mainly by the surface tension of the glass surface at high temperature. The entire process does not remove material and does not damage the surface. High-precision non-damage smooth polishing can be achieved. Laser polishing has the advantages of low polishing cost, no need for polishing liquid, safety and no pollution, easy to control, high flexibility, high polishing efficiency, etc. However, after laser polishing of glass, micron-level periodic lines or pits, i.e., track marks, are often left. These track marks need to be etched by post-processing etching processes such as acid etching. Etching will amplify the non-uniformity of the material to form a pit structure, which will instead increase the roughness of the glass.
[0031] Therefore, it is necessary to provide a glass laser polishing method that can eliminate track marks and improve the quality of laser polishing.
[0032] In one aspect of the present application, a glass laser polishing method is provided, which includes the following steps:
[0033] The glass is preheated, and the preheating temperature is 350℃-650℃.
[0034] The preheated glass is subjected to multiple laser scans in different scanning directions. The angle between the scanning directions of two adjacent laser scans in the multiple laser scans is 30°-120°, and the laser line spacing of the laser scans is 0.1mm-1mm.
[0035] The polishing method above combines high-temperature preheating with multi-directional scanning, while precisely controlling the laser line spacing, to suppress the track imprint defects commonly existing in traditional laser polishing, greatly reduce the roughness of the polished glass surface, significantly weaken the concave-convex feeling on the microscopic morphology, and make the glass obviously transparent, without texture and deformation, to achieve high-quality polishing effect. The temperature of the preheating treatment is controlled at 350℃-650℃ to micro-soften the glass surface, and the molten area generated by laser scanning automatically flows and levels under the action of surface tension, which is beneficial to fill the micro-relief at the edge of the scanning line and eliminate the bright-dark texture caused by uneven energy; the angle between the scanning directions of the adjacent two laser scans in the multiple laser scans is 30°-120°, which destroys the periodic energy distribution of single-direction scanning, makes the scanning tracks of different directions interweave, and breaks down the basis for forming track imprints such as parallel stripes and grid imprints, and further suppresses the generation of track imprints; the laser line spacing of laser scanning is controlled at 0.1mm-1mm to improve the scanning overlap rate, reduce the un-melted gullies caused by incomplete coverage, and facilitate the continuous and uniform distribution of energy on the plane or curved surface.
[0036] The polishing method above expands the application range of the laser polishing method and still has outstanding polishing effect on curved surfaces.
[0037] The laser line spacing refers to the interval distance between the laser scanning beams, which gradually scans and covers the entire area to be polished.
[0038] As an example, the temperature of the preheating treatment can be 350℃, 360℃, 370℃, 380℃, 390℃, 400℃, 410℃, 420℃, 430℃, 440℃, 450℃, 460℃, 470℃, 480℃, 490℃, 500℃, 510℃, 520℃, 530℃, 540℃, 550℃, 560℃, 570℃, 580℃, 590℃, 600℃, 610℃, 620℃, 630℃, 640℃, and 650℃, or a range formed by any two of the above values as end values.
[0039] Further, the temperature of the preheating treatment is 450℃-550℃. Within this preheating temperature range, the glass can be heated more uniformly during laser action, the temperature difference between different parts of the glass is small, which further suppresses the generation of cracks and reduces the roughness; and within this preheating temperature range, crystallization can be suppressed and the light transmittance of the glass can be improved.
[0040] As an example, the included angle between the scanning directions of two adjacent laser scans in the multiple laser scans is 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, and 120°, or a range formed by any two of the above values as end values.
[0041] As an example, when four laser scans are performed, the scanning directions of the four laser scans are 0°, 90°, 45°, and 135°, as shown in FIG. 4 (the side view angle of the surface to be polished is 90°, and the arrow represents the scanning direction of the laser scan, i.e., the extension direction of the scanning path). Figure 1 Figure 1 As an example, when four laser scans are performed, the scanning directions of the four laser scans are 0°, 90°, 45°, and 135°, as shown in FIG. 4 (the side view angle of the surface to be polished is 90°, and the arrow represents the scanning direction of the laser scan, i.e., the extension direction of the scanning path). Figure 1 Figure 2 As an example, when four laser scans are performed, the scanning directions of the four laser scans are 0°, 90°, 45°, and 135°, as shown in FIG. 4 (the side view angle of the surface to be polished is 90°, and the arrow represents the scanning direction of the laser scan, i.e., the extension direction of the scanning path). Figure 2 Figure 2 As an example, when four laser scans are performed, the scanning directions of the four laser scans are 0°, 90°, 45°, and 135°, as shown in FIG. 4 (the side view angle of the surface to be polished is 90°, and the arrow represents the scanning direction of the laser scan, i.e., the extension direction of the scanning path).
[0042] Further, the included angle between the scanning directions of two adjacent laser scans in the multiple laser scans is 45°-90°. Controlling the included angle between the scanning directions of two adjacent laser scans to be 45°-90° not only further reduces the roughness, but also greatly improves the curved surface adaptability of the laser polishing, i.e., a relatively low roughness can be obtained even in a curvature mutation area.
[0043] As an example, the laser line spacing of the laser scan can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, and 1 mm, or a range formed by any two of the above values as end values.
[0044] Further, the laser line spacing of the laser scan is 0.1 mm-0.2 mm. Under this laser line spacing, the thermal stress can be reduced, the curved surface fitting precision of the laser scan is improved, and the roughness is further reduced.
[0045] In some embodiments, the number of laser scans is 3-10 times.
[0046] Further, the number of laser scans is 4-5 times.
[0047] In some embodiments, the surface to be polished of the glass is curved, the preheated glass is rotated during the laser scanning, and the incident direction of the laser beam is always perpendicular to the surface to be polished of the glass.
[0048] Understandably, when the surface to be polished of the glass is curved, the glass sample is fixed by a jig with rotation and swing functions. The glass is rotated or swung at a certain speed when the jig is rotated or swung, and the surface to be polished of the glass is always perpendicular to the laser beam.
[0049] In some embodiments, the surface to be polished of the glass is curved, the preheated glass is rotated during the laser scanning, and the incident direction of the laser beam is always perpendicular to the surface to be polished of the glass.
[0050] Further, the radius of curvature of the curved surface is 800 mm, and the rotation speed of the glass is 8 mm / s to 12 mm / s.
[0051] In some embodiments, the surface to be polished of the glass is curved, the preheated glass is rotated during the laser scanning, and the incident direction of the laser beam is always perpendicular to the surface to be polished of the glass.
[0052] In some embodiments, the scanning speed of the laser scanning is 10 mm / s to 500 mm / s.
[0053] Further, the scanning speed of the laser scanning is 100 mm / s to 300 mm / s.
[0054] In some embodiments, the scanning width of the laser scanning is 3 mm to 10 mm.
[0055] Further, the scanning width of the laser scanning is 4 mm to 5 mm.
[0056] In some embodiments, the holding time of the preheating treatment is 5 min to 30 min.
[0057] Further, the holding time of the preheating treatment is 10 min to 30 min.
[0058] In some embodiments, a glass product is provided, which is polished by the aforementioned glass laser polishing method.
[0059] The glass product includes but is not limited to display and touch panels, vehicle-mounted optical components, high-end decorative glass, and optical instrument core components.
[0060] Further, the glass product includes mobile phone display screens, mobile phone back cover backboards, mobile phone back cover 3D glasses, tablet display screens, computer display screens, vehicle-mounted windows, curved windshields, and camera lenses, etc.
[0061] In order to make the purpose, technical scheme and advantages of the present application more concise and clear, the present application is described by the following specific examples, but the present application is not limited to these examples. The following examples are only better embodiments of the present application, which can be used to describe the present application, and cannot be understood as limiting the scope of the present application. It should be pointed out that any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
[0062] In order to better illustrate the present application, the content of the present application is further described below in combination with examples. The following are specific examples.
[0063] In the following examples and comparative examples, the roughness of the straight body position (the surface to be polished) of the glass after CNC cutting is 625 nm.
[0064] Example 1
[0065] A 50mm*5mm*5mm cuboid glass strip was fixed on a jig, and the jig and the glass strip were placed on a titanium-based heating plate, the temperature of the titanium-based heating plate was raised to 500℃, and the temperature was kept for 20 min; the glass straight body position was scanned by using a CO2 continuous laser with a wavelength of 10.6 μm, the laser line spacing was 0.2 mm, the laser scanning width was 5 mm, the scanning times were 4, the first scanning direction in the 4 scanning times was defined as 0°, and the 4 scanning directions were 0°, 90°, 45° and 135° respectively, the laser frequency was 50 KHz, the scanning speed was 100 mm / s, and the jig remained stationary during the scanning process, i.e. the rotation speed of the jig was 0.
[0066] Example 2
[0067] A φ25mm*5mm (diameter 25mm, thickness 5mm) glass cylinder was fixed on a jig, and the jig and the glass cylinder were placed on a titanium-based heating plate, the temperature of the titanium-based heating plate was raised to 550℃, and the temperature was kept for 15 min. The surface to be polished of the glass cylinder was scanned by using a CO2 continuous laser, the laser line spacing was 0.15 mm, the laser scanning width was 4 mm, the scanning times were 5, the first scanning direction in the 5 scanning times was defined as 0°, and the 5 scanning directions were 0°, 90°, 45°, 135° and 0° respectively, the laser frequency was 50 KHz, the scanning speed was 100 mm / s, and during the scanning process, the jig rotated longitudinally at a speed of 35 mm / s to drive the glass cylinder to rotate (the glass cylinder rotated around the central axis of the glass cylinder), so that the laser and the surface to be polished of the glass cylinder remained perpendicular, and the laser continuously acted on the center position of the cross section of the glass cylinder.
[0068] Example 3
[0069] A φ25mm*5mm glass cylinder is fixed on the jig, and the jig and the glass cylinder are placed on a titanium-based heating plate, the temperature of the titanium-based heating plate is raised to 550℃, and the temperature is kept for 15 min; the CO2 continuous laser is used to scan the cylindrical surface of the glass cylinder to be polished, the laser line spacing is 0.1mm, the laser scanning width is 4mm, the scanning times are 5 times, the first scanning direction in the 5 times scanning is defined as 0°, and the 5 times scanning directions are 0°, 90°, 45°, 135° and 0° respectively, the laser frequency is 50KHz, and the scanning speed is 150mm / s. The jig rotates longitudinally at a speed of 50mm / s to drive the glass cylinder to rotate at the same speed, so that the laser and the polished cylindrical surface of the glass always keep perpendicular, and the laser continuously acts on the center position of the cross section of the glass cylinder.
[0070] Example 4
[0071] A 50mm*5mm*5mm glass strip is fixed on the jig, and the jig and the glass strip are placed on a titanium-based heating plate, the temperature of the titanium-based heating plate is raised to 450℃, and the temperature is kept for 30 min. The CO2 continuous laser is used to scan the glass straight body, the laser line spacing is 0.2mm, the laser scanning width is 5mm, the scanning times are 5 times, the first scanning direction in the 5 times scanning is defined as 0°, and the 5 times scanning directions are 0°, 90°, 45°, 135° and 180° respectively, the laser frequency is 50KHz, the scanning speed is 200mm / s, and the jig remains stationary during scanning.
[0072] Example 5
[0073] A 600mm*270mm (the projection of the arc-shaped curved surface glass is a rectangle, 600mm is the length of the rectangle, and 270mm is the width of the rectangle) arc-shaped curved surface glass (not free curved surface glass) with a curvature radius of 800mm is fixed on the jig, and the jig and the curved surface glass are placed on a titanium-based heating plate, the temperature of the titanium-based heating plate is raised to 550℃, and the temperature is kept for 25 min. The CO2 continuous laser is used to scan the arc-shaped curved surface of the arc-shaped curved surface glass, the laser line spacing is 0.25mm, the laser scanning width is 5.5mm, the scanning times are 5 times, the first scanning direction in the 5 times scanning is defined as 0°, and the 5 times scanning directions are 0°, 90°, 45°, 135° and 0° respectively, the laser frequency is 50KHz, the scanning speed is 300mm / s, and the jig swings at a speed of 20mm / s during scanning, and the swinging direction is tangent to the curvature direction of the curved surface glass at all times, that is, to ensure that the laser is always perpendicular to the curved surface glass polishing surface.
[0074] Example 6
[0075] Example 6 is substantially the same as Example 1, except that the 4 scanning directions are 0°, 30°, 60° and 90°, respectively.
[0076] Example 7
[0077] Example 7 is substantially the same as Example 1, except that the laser line spacing of the laser scanning is 1 mm.
[0078] Comparative Example 1
[0079] Comparative Example 1 is substantially the same as Example 1, except that the temperature of the titanium-based heating plate is increased to 200℃, and the holding time is 30 min.
[0080] Comparative Example 2
[0081] Comparative Example 2 is substantially the same as Example 2, except that the laser line spacing is 0.03 mm.
[0082] Comparative Example 3
[0083] Comparative Example 3 is substantially the same as Example 5, except that the number of scans is 5, and the 5 scanning directions are all 0°, i.e., a single scanning direction is used; and the scanning speed is 200 mm / s.
[0084] Comparative Example 4
[0085] Comparative Example 4 is substantially the same as Example 2, except that the laser line spacing is 0.2 mm, the number of scans is 1, and the scanning direction is 0°.
[0086] Comparative Example 5
[0087] Comparative Example 5 is substantially the same as Example 1, except that the number of laser scans is 5, and the 5 scanning directions are all 0°, i.e., a single scanning direction is used.
[0088] Comparative Example 6
[0089] Comparative Example 6 is substantially the same as Example 1, except that the number of scans is 4, and the 4 scanning directions are 0°, 20°, 40° and 60°, respectively.
[0090] Comparative Example 7
[0091] Comparative Example 7 is substantially the same as Example 3, except that the number of scans is 5, and the scanning directions are all 0°, i.e., a single scanning direction is used.
[0092] The glass products polished in each of the examples and comparative examples were tested for roughness and morphology. The main parameters involved in the polishing process and the test results are shown in Table 1 and Table 2.
[0093] The roughness is detected by a laser confocal microscope method. The sample to be detected is placed under the laser microscope, and the surface profile of the polished surface is scanned without contact. The laser microscope is a VK950.
[0094] Table 1
[0095]
[0096] Table 2
[0097]
[0098] From the above Tables 1 and 2, it can be seen that in each embodiment, the high-temperature preheating is combined with multi-directional scanning, and the laser line spacing is controlled, so that the track printing defects commonly existing in traditional laser polishing are eliminated, the glass polished surface is smooth and transparent, and there is no texture and deformation, and a high-quality polishing effect is achieved. The appearance of the glass after laser polishing in Example 1 is shown in Figure 3 , the microscopic morphology of the glass after laser polishing in Example 1 is shown in Figure 4 , and the microscopic morphology of the glass after original CNC machining is shown in Figure 5 . Moreover, it can be seen from Examples 2, 3 and 5 that the polishing method has outstanding polishing effect on curved surfaces.
[0099] Moreover, when the included angle between the scanning directions of the adjacent two times of laser scanning in the multiple laser scanning is 45°-90°, or the laser line spacing of the laser scanning is 0.1 mm-0.2 mm, or the temperature of the preheating treatment is 450°C-550°C, the roughness after laser polishing is lower, and the appearance quality is better.
[0100] In Comparative Example 1, the glass preheating temperature is not enough, the glass is heated concentrated in the process of laser action, there is a cold and hot temperature difference, and the glass is broken. In Comparative Example 2, the glass cylinder section after laser polishing is visually transparent, but softening deformation occurs. It may be that the laser line spacing is too small, the thermal effect between the laser lines is large, the local heating of the glass is large, the temperature of the glass surface rises rapidly, and the glass surface softens and collapses and deforms. The specific situation is shown in Figure 6 . In Comparative Example 3, the curved glass is visually transparent, but there are obvious track prints on the entire polishing surface. In Comparative Example 4, after laser polishing, the glass cylinder section is visually blurred, and there are a small amount of particle points. In Comparative Examples 5 and 7, after laser polishing, the glass surface is visually transparent, but there are obvious strip-shaped track prints. The appearance of the glass after laser polishing in Comparative Example 4 is shown in Figure 7 .
[0101] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as there is no conflict, any combination of the technical features should be considered within the scope of the present disclosure.
[0102] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A method of laser polishing glass, characterized by, The method comprises the following steps: preheating the glass at a temperature of 350-650 DEG C; carrying out multiple laser scans on the preheated glass in different scanning directions, wherein the angle between the scanning directions of two adjacent laser scans is 30-120 DEG, and the laser line spacing of the laser scan is 0.1-1 mm.
2. The glass laser polishing method of claim 1, wherein, At least one of the following conditions is met: (1) the angle between the scanning directions of two adjacent laser scans is 45-90 DEG; (2) the laser line spacing of the laser scan is 0.1-0.2 mm; (3) the preheating temperature is 450-550 DEG C.
3. The glass laser polishing method of claim 1, wherein, The number of laser scans is 3-10.
4. The glass laser polishing method of any one of claims 1 to 3, wherein, The surface to be polished of the glass is a curved surface, the preheated glass is rotated during the laser scan, and the incident direction of the laser beam is always perpendicular to the surface to be polished of the glass.
5. The glass laser polishing method of claim 4, wherein, The surface to be polished of the glass is an arc-shaped curved surface, the radius of curvature of the arc-shaped curved surface is 200-1000 mm, and the rotation speed of the glass is 5-25 mm / s.
6. The glass laser polishing method of claim 4, wherein, The surface to be polished of the glass is a cylindrical surface, the radius of the cylindrical surface is 5-100 mm, and the rotation speed of the glass is 20-400 mm / s.
7. The glass laser polishing method of any one of claims 1 to 3, wherein, The scanning speed of the laser scan is 10-500 mm / s.
8. The glass laser polishing method of any one of claims 1 to 3, wherein, The scanning width of the laser scan is 3-10 mm.
9. The glass laser polishing method of any one of claims 1 to 3, wherein, The holding time of the preheating is 5-30 min.
10. The glass laser polishing method of any one of claims 1 to 3, wherein, The laser used in the laser scan includes at least one of CO2 continuous laser, infrared laser, ultraviolet laser and fiber laser.