Device for adjusting glass strength and method for adjusting glass strength

Abstract

The present invention relates to the field of chip testing, and discloses a device for adjusting glass strength and a method for adjusting glass strength. The device for adjusting glass strength includes: a laser, which is used to emit initial pulsed laser; a beam expander, which is used to expand and amplify the initial pulsed laser; a focusing component, which is used to focus and adjust the focus of the initial pulsed laser that has been expanded and amplified by the beam expander to obtain a target pulsed laser, and the target pulsed laser is used to focus and irradiate on the glass to form um-level microcracks on the glass. In this way, by adopting the technical means of ultrafast laser shaping and non-contact etching, the technical problems that the glass strength needs to be flexibly regulated in special use scenarios and that contact etching will cause obvious etching marks on the glass surface and affect the visual effect are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of light intensity adjustment, and particularly to a device for adjusting the strength of glass and a method for adjusting the strength of glass. Background Art

[0002] As a brittle and hard material, glass is widely used in various different usage scenarios. In these different usage scenarios, it is often considered that the higher the strength of the glass, the better. However, as glass extends to some special usage scenarios, the requirements for the strength of glass are more flexible. Instead of simply demanding higher strength, it is desired that the strength of the glass can be appropriately weakened or adjusted.

[0003] In the related art, weakening (adjusting) the strength of glass is often achieved by means of contact etching, which damages the surface of the glass to release the internal stress of the glass, thereby reducing the compressive strength of the glass.

[0004] However, contact etching often leaves obvious etching marks on the glass surface, affecting the visual effect of the glass. Summary of the Invention

[0005] The main object of the present invention is to propose a device for adjusting the strength of glass and a method for adjusting the strength of glass, aiming to reduce obvious etching marks on the glass surface and improve the visual effect of the glass.

[0006] In a first aspect, the present invention proposes a device for adjusting the strength of glass, which includes:

[0007] A laser, which is used to emit initial pulsed laser;

[0008] A beam expander, which is used to expand and amplify the initial pulsed laser;

[0009] A focusing component, which is used to focus and adjust the focus of the initial pulsed laser that has been expanded and amplified by the beam expander to obtain a target pulsed laser, and the target pulsed laser is used to focus and irradiate on the glass to form microcracks in the order of um on the glass.

[0010] In some embodiments, the focal diameter of the target pulsed laser is greater than or equal to 2 um and less than or equal to 20 um; and / or,

[0011] The focal depth length of the target pulsed laser is greater than or equal to 0.2 mm and less than or equal to 20 mm; and / or,

[0012] The wavelength of the target pulsed laser is greater than or equal to 350 nm and less than or equal to 1070 nm; and / or,

[0013] The laser pulse width of the target pulsed laser is greater than or equal to 200 fs and less than or equal to 200 ps.

[0014] In some embodiments, the focusing component includes:

[0015] A diffractive axicon, which shapes the initial pulsed laser beam expanded and magnified by the beam expander into a non-diffracting laser beam;

[0016] A plano-convex lens and an aspherical lens, the plano-convex lens is disposed between the diffractive axicon and the aspherical lens, and the plano-convex lens and the aspherical lens are used to focus the non-diffracting laser beam to obtain the target pulsed laser beam.

[0017] In some embodiments, the focusing component further includes a mask plate, which is located between the beam expander and the diffractive axicon;

[0018] At least one coated area is provided on the mask plate, and the coated area is used to block part of the laser beam irradiated from the beam expander to the diffractive axicon.

[0019] In some embodiments, the number of circles of the coated area provided on the mask plate is greater than or equal to 1 and less than or equal to 20.

[0020] In some embodiments, the focusing component includes a diffractive mirror and a focusing lens;

[0021] The diffractive mirror is located between the beam expander and the focusing lens, and the diffractive mirror is used to perform phase modulation on the initial pulsed laser beam expanded and magnified by the beam expander to obtain diffracted light rays with at least one focal point;

[0022] The focusing lens is used to focus the diffracted light rays to obtain the target pulsed laser beam.

[0023] In some embodiments, the number of focal points of the diffracted light rays obtained by the phase modulation of the diffractive mirror is greater than or equal to 1 and less than or equal to 20.

[0024] In some embodiments, the device for adjusting the glass strength further includes a reflector, which is disposed between the beam expander and the focusing component;

[0025] The reflector is used to reflect the laser beam of the initial pulsed laser beam expanded and magnified in the beam expander to the focusing component, so as to adjust the propagation direction of the initial pulsed laser beam and enter the focusing component to perform intensity adjustment on the initial pulsed laser beam.

[0026] In a second aspect, the present invention further provides a method for adjusting the glass strength, and the method for adjusting the glass strength includes:

[0027] The target pulsed laser is focused and irradiated on the glass to form microcracks in the order of um on the glass.

[0028] In some embodiments, the focal diameter of the target pulsed laser is greater than or equal to 2 um and less than or equal to 20 um; and / or,

[0029] The focal depth length of the target pulsed laser is greater than or equal to 0.2 mm and less than or equal to 20 mm; and / or,

[0030] The wavelength of the target pulsed laser is greater than or equal to 350 nm and less than or equal to 1070 nm; and / or,

[0031] The laser pulse width of the target pulsed laser is greater than or equal to 200 fs and less than or equal to 200 ps.

[0032] In the embodiments of the present application, the device for adjusting the glass strength can form microcracks in the order of um on the glass based on the method for adjusting the glass strength. Specifically, the device for adjusting the glass strength includes: a laser for emitting an initial pulsed laser; a beam expander for expanding and amplifying the initial pulsed laser; and a focusing component for focusing and adjusting the focus of the initial pulsed laser expanded and amplified by the beam expander to obtain a target pulsed laser, which is used to be focused and irradiated on the glass to form microcracks in the order of um on the glass.

[0033] The beneficial effects of the technical solution of the present invention are as follows: By adopting the technical means of ultrafast laser shaping and non-contact etching, the technical problems that the glass strength needs to be flexibly regulated in special use scenarios and the contact etching will cause obvious etching marks on the glass surface and affect the visual effect are solved. Specifically, in this solution, an initial pulsed laser is emitted by a laser, expanded and amplified by a beam expander, and then focused and adjusted by a focusing component to obtain a target pulsed laser. The target pulsed laser is focused and irradiated on the glass to form microcracks in the order of um on the glass, thereby realizing the regulation of the glass strength. Through this technical means, it is possible to regulate the compressive strength of the glass, meet the different requirements for the glass strength in special fields, adopt the non-contact etching method to avoid the problem that the contact etching is easy to crush the glass, and avoid the defects that the contact etching method is easy to crush the glass and the etching marks are obvious, meeting the requirements for the flexible regulation of the glass strength in special fields without affecting the visual effect. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of a device for adjusting the strength of glass disclosed in the embodiments of the present application;

[0036] Figure 2 It is a schematic structural diagram of a focusing component in the device for adjusting the strength of glass disclosed in the embodiments of the present application;

[0037] Figure 3 It is a schematic diagram of a kind of microcrack generated after the device for adjusting the strength of glass disclosed in the embodiments of the present application modifies the glass;

[0038] Figure 4 It is a schematic structural diagram of another focusing component in the device for adjusting the strength of glass disclosed in the embodiments of the present application;

[0039] Figure 5 It is a schematic structural diagram of a coating area in the device for adjusting the strength of glass disclosed in the embodiments of the present application;

[0040] Figure 6 It is a schematic diagram of a scenario of the device for adjusting the strength of glass disclosed in the embodiments of the present application;

[0041] Figure 7 It is a schematic diagram of another kind of microcrack generated after the device for adjusting the strength of glass disclosed in the embodiments of the present application modifies the glass;

[0042] Figure 8 It is a schematic structural diagram of yet another focusing component in the device for adjusting the strength of glass disclosed in the embodiments of the present application;

[0043] Figure 9 It is a schematic diagram of another scenario of the device for adjusting the strength of glass disclosed in the embodiments of the present application;

[0044] Figure 10 It is a schematic diagram of yet another kind of microcrack generated after the device for adjusting the strength of glass disclosed in the embodiments of the present application modifies the glass.

[0045] Explanation of the reference numerals in the drawings:

[0046]

[0047] The realization of the object of the present invention, functional features and advantages will be further described with reference to the embodiments and the drawings. Detailed implementation manners

[0048] The following will clearly and completely describe the solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] It should be noted that all directional indications (such as up, down, left, right, front, back, top, bottom, side...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0050] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0051] In the following description, "some embodiments" are involved, which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and they can be combined with each other without conflict. In the following description, the term "a plurality" refers to at least two.

[0052] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0054] In order to enable those skilled in the technical field to better understand the solutions of this application, before further elaborating on the embodiments of this application in detail, the prior art related to the embodiments of this application and the defects existing in the prior art are elaborated in detail as follows:

[0055] As a brittle and hard material, glass is widely used in many application scenarios due to its unique properties. In the past, it was generally believed that the higher the strength of glass, the better, to ensure its stability and safety during use. However, with the continuous expansion of the application fields of glass, especially in some special scenarios, the requirements for the strength of glass have become more flexible and diverse. For example, in certain specific situations, it may be necessary to appropriately reduce the strength of the glass, or it can be precisely adjusted according to actual needs to meet different functional requirements.

[0056] In the related technologies in the past, in order to weaken (adjust) the strength of glass, a contact etching method was usually adopted. The principle of this method is to release the internal stress of the glass by scratching and etching the glass surface, thereby reducing the compressive strength of the glass. However, there are some obvious technical problems with this contact etching method:

[0057] 1. It is easy to crush the glass: During the contact etching process, the etching tool directly contacts the glass surface and applies pressure. Due to the brittle and hard characteristics of the glass itself, this pressure may cause local stress concentration at the etching point of the glass. When the stress exceeds the bearing limit of the glass, the glass is prone to breakage. This not only affects the yield rate of the glass but may also lead to the failure of the entire product.

[0058] 2. The etching marks are obvious and affect the visual effect of the glass: Contact etching will leave obvious scratches, etch marks and other marks on the glass surface. These marks will damage the flatness and smoothness of the glass surface, thereby affecting the light transmittance and visual effect of the glass. In some occasions with high requirements for the appearance of the glass, such as the display screens of high-end electronic products and the lenses of optical instruments, these obvious etching marks are unacceptable because they will reduce the quality and aesthetics of the products.

[0059] In summary, the contact etching method in the related technologies has obvious deficiencies in meeting the requirements of flexible regulation of the strength of glass, and it cannot effectively take into account both the integrity of the glass and good visual effects at the same time. This has promoted the exploration and research of new technical means to solve these technical problems and meet the higher requirements of the market for the performance of glass.

[0060] The present invention proposes a device for adjusting the strength of glass, which is mainly used for adjusting the strength of glass.

[0061] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a device for adjusting the strength of glass disclosed in an embodiment of the present application. In the embodiment of the present application, the device for adjusting the strength of glass may include: a laser 11, a beam expander 12 and a focusing assembly 13, wherein:

[0062] The laser 11 is used to emit an initial pulsed laser.

[0063] The beam expander 12 is used to expand and amplify the initial pulsed laser.

[0064] The focusing component 13 is used to focus and adjust the focus of the initial pulsed laser that has been expanded and amplified by the beam expander 12 to obtain a target pulsed laser, which is used to focus and irradiate the glass 10 to form microcracks in the micron level on the glass.

[0065] In another embodiment, the device for adjusting the glass strength may further include a reflecting mirror 14. The reflecting mirror 14 is disposed between the beam expander 12 and the focusing component 13; the reflecting mirror 14 is used to reflect the laser of the initial pulsed laser expanded and amplified in the beam expander 12 to the focusing component 13 to adjust the propagation direction of the initial pulsed laser and enter the focusing component 13 to adjust the intensity of the initial pulsed laser.

[0066] The working principle of the device for adjusting the glass strength in this embodiment is as follows: First, the laser 11 emits an initial pulsed laser, and the initial pulsed laser is expanded and amplified by the beam expander 12 to increase the energy density of the laser. Then, the expanded and amplified laser enters the focusing component 13 after being reflected by the reflecting mirror 14. Based on this, the focusing component 13 adjusts the strength of the glass.

[0067] In summary, the microcracks of the glass are regulated by the high-energy pulses in the focusing formation region of the ultrafast laser, so as to achieve the regulation of the glass strength. Generally, the absorption rate of the glass to visible light and near-infrared light beams is extremely low. The ultrafast laser generates a strong nonlinear effect in an ultra-short time, causing the glass material to form multi-photon absorption. The laser energy is deposited in the free carrier plasma and then transmitted to the glass material matrix. When the energy reaches the threshold of the plasma density, it evolves into liquid and gas phases through electron-lattice coupling, forming a self-focusing phenomenon inside the material, intensifying the multi-photon absorption process. The instantaneous high temperature and high pressure cause volume voids to form during the entire tunneling process, generating a micro-explosion, that is, the Coulomb force micro-explosion. When the internal pressure exceeds the mechanical resistance of the material, impact and rarefaction phenomena will occur, compressing the material laterally and axially opening a low-density region on the transmission trajectory of the beam, causing the laser to break the glass to form microcracks, and thus realizing the regulation of the glass strength.

[0068] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a focusing component 13 disclosed in an embodiment of the present application. In the embodiment of the present application, the focusing component 13 may include: a diffractive optical cone lens 131, a plano-convex lens 132, and an aspherical lens 133.

[0069] The diffractive optical conical mirror 131 shapes the initial pulsed laser beam that has been expanded and magnified by the beam expander 12 to obtain a non-diffracting laser beam.

[0070] The plano-convex lens 132 is disposed between the diffractive optical conical mirror 131 and the aspherical lens 133. The plano-convex lens 132 and the aspherical lens 133 are used to focus the non-diffracting laser beam to obtain a target pulsed laser beam.

[0071] It should be noted that the plano-convex lens 132 and the aspherical lens 133 are used to focus the non-diffracting laser beam at the long-depth-of-focus point 130, thereby obtaining a target pulsed laser beam.

[0072] Please refer to Figure 3 , Figure 3 FIG. is a schematic diagram of a micro-crack generated after a focusing component 13 disclosed in an embodiment of the present application modifies glass. The crack is a filamentous crack perpendicular to the thickness of the glass and penetrating the width of the glass. Thus, it helps to more precisely control the strength of the glass. Due to the direction and penetration characteristics of the crack, the stress inside the glass can be more effectively released, thereby achieving precise adjustment of the glass strength to meet the specific requirements of different application scenarios for the glass strength. Reducing the impact on other properties of the glass. The filamentous cracks are relatively concentrated in a specific direction and have less impact on the overall structural stability of the glass, and can maintain other properties of the glass, such as light transmittance, while reducing the glass strength. In addition, the visual obstruction is further reduced. Such filamentous cracks are relatively inconspicuous visually, especially when the middle part is not modified by the laser, which can make the appearance of the glass cleaner, reduce the visual interference caused by the cracks, and improve the visual effect of the glass during use.

[0073] The working principle of the device for adjusting the glass strength in this embodiment is as follows: First, the laser 11 emits an initial pulsed laser beam, which is expanded and magnified by the beam expander 12 to increase the energy density of the laser beam. Then, the expanded and magnified laser beam is reflected by the mirror 14 and enters the focusing component 13. Based on this focusing component 13, the strength of the glass is adjusted. After entering the focusing component 13, the initial pulsed laser beam passes through the diffractive optical conical mirror 131 to obtain a non-diffracting light beam, and then is focused by the plano-convex lens 132 and the aspherical lens 133 at the long-depth-of-focus point 130, thereby obtaining a target pulsed laser beam. The focal diameter of this long-depth-of-focus point is 2um - 20um, and the depth of focus length is 0.2mm - 20mm. This focal point is used to act on the glass material to form a penetrating modification effect and form surface micro-cracks.

[0074] Please refer to Figure 4 , Figure 4 FIG. is a schematic structural diagram of another focusing component 13 disclosed in an embodiment of the present application. In the embodiment of the present application, the focusing component 13 may include a mask plate 134.

[0075] The focusing component 13 may include: a diffractive optical axicon 131, a plano-convex lens 132, an aspherical lens 133, and a mask plate 134.

[0076] The diffractive optical axicon 131 shapes the initial pulsed laser beam expanded and magnified by the beam expander 12 to obtain a non-diffracting laser beam.

[0077] The plano-convex lens 132 is disposed between the diffractive optical axicon 131 and the aspherical lens 133. The plano-convex lens 132 and the aspherical lens 133 are used to focus the non-diffracting laser beam to obtain a target pulsed laser beam.

[0078] The mask plate 134 may be located between the beam expander 12 and the diffractive optical axicon 131. At least one coating area 1341 is provided on the mask plate 134. The coating area 1341 is used to block part of the laser beam irradiated from the beam expander to the diffractive optical axicon.

[0079] Please refer to Figure 5 , Figure 5 , which is a schematic structural diagram of a coating area 1341 disclosed in an embodiment of the present application. In the embodiment of the present application, the mask plate 134 may be provided with at least one circle of coating areas 1341. Among them, the mask plate 134 can be used to partially block or cut the beam of the initial pulsed laser. Due to the characteristics of the coating area 1341, the mask plate 134 blocks part of the light rays in the beam of the initial pulsed laser, thereby changing the transmitted beam. Specifically, the initial pulsed laser passing through the coating area 1341 in the mask plate 134 can have a long focal depth focus with specific characteristics. For example, the focus is divided into multiple segments to meet the requirements of glass strength regulation and visual obstruction reduction. The number of circles of the coating area determines the number of segments into which the long focal depth focus is divided.

[0080] Exemplarily, the relationship between the number of circles N of the coating area 1341 of the mask plate 134 and the number of segments into which the long focal depth focus is divided is: N circles of rings = N + 1 segments. For example, when the number of circles of rings of the coating area N = 1, the long focal depth focus is divided into 2 segments; when the number of circles of rings of the coating area N = 2, the long focal depth focus is divided into 3 segments, and so on.

[0081] Please refer to Figure 6 , Figure 6 , which is a schematic scenario diagram disclosed in an embodiment of the present application. Specifically, the corresponding relationship between the long focal depth foci corresponding to the number of circles of the coating area can be as follows. The initial pulsed laser passes through Figure 5 the corresponding coating area 1341 (number of circles of rings N = 1) of the mask plate 134, then the long focal depth focus of the initial pulsed laser is divided into two segments.

[0082] Please refer to Figure 7 , Figure 7It is a schematic diagram of another focusing component 13 disclosed in the embodiments of the present application for generating microcracks after modifying the glass. The cracks include two cracks respectively located on the upper and lower surfaces in the vertical direction of the glass, and the two cracks located on the upper and lower surfaces of the glass are respectively filamentous cracks. Thus, when the target pulsed laser acts on the glass, it mainly damages the upper and lower surfaces of the glass, causing microcracks to form on the upper and lower surfaces. Since the focus is divided into two segments in the middle part, it is not affected by the laser modification. Such an action mode makes the laser action point that can be seen become smaller in the visual effect, thereby more effectively reducing the visual obstruction. That is to say, this way of processing the glass by the laser, while meeting the regulation of the glass strength, minimizes the impact on the visual effect of the glass, making it more beautiful in appearance and more in line with some application scenarios with high requirements for the visual effect.

[0083] Please refer to Figure 8 , Figure 8 It is a schematic diagram of the structure of another focusing component 13 disclosed in the embodiments of the present application. In the embodiments of the present application, the focusing component 13 may include a diffraction mirror 135 and a focusing lens 136.

[0084] The diffraction mirror 135 is located between the beam expander 12 and the focusing lens 136, and the diffraction mirror 135 is used to perform phase modulation on the initial pulsed laser beam expanded and amplified by the beam expander 12 to obtain diffracted light with at least one focal point.

[0085] The focusing lens 136 is used to focus the diffracted light to obtain the target pulsed laser beam.

[0086] In one embodiment, the number of focal points of the diffracted light obtained by the phase modulation of the diffraction mirror 135 is greater than or equal to 1 and less than or equal to 20.

[0087] It should be noted that the diffraction mirror 135 is an optical element designed by utilizing the wave nature of light. It changes the phase of the light wave transmitted when the light passes through by the microstructures on its surface, thereby performing phase modulation on the incident light. When the laser with a long depth of focus irradiates the diffraction beam splitting phase plate, diffraction of light will occur. By reasonably designing the microstructures of the phase plate, the light can be dispersed in different diffraction orders. According to the set diffraction order and object distance, the required number of focal points can be generated to achieve multi-point focusing in the beam transmission direction. This method can more precisely control the distribution of microcracks in the glass by forming multiple focal points at different positions of the glass in the regulation of the glass strength, realizing flexible regulation of the glass strength while reducing the impact on the visual effect of the glass.

[0088] Please refer to Figure 9 , Figure 9It is another schematic diagram of a scenario disclosed in the embodiments of the present application. The set multiple foci can be two foci. According to relevant parameter settings, after light passes through the diffractive optical element, two focal points can be formed at specific positions, thereby enabling precise control and focusing of light and meeting different optical application requirements.

[0089] Please refer to Figure 10 , Figure 10 It is a schematic diagram of another microcrack generated after the focusing component 13 disclosed in the embodiments of the present application modifies the glass. The crack includes two cracks located at different height positions in the vertical direction of the glass, and the two cracks at different height positions in the vertical direction of the glass are respectively filamentous cracks. The two filamentous cracks located at different height positions can more comprehensively release the stress inside the glass, thereby more effectively regulating the strength of the glass so that it can meet more complex usage requirements. Therefore, the strength of the glass is more effectively regulated. In addition, the filamentous cracks themselves have less visual impact, and the two cracks are located at different height positions and are relatively dispersed, further reducing the interference with the visual effect of the glass and making the glass more beautiful in appearance.

[0090] The present invention also proposes a method for adjusting the strength of glass, which specifically includes the following steps.

[0091] Step 101, using a target pulsed laser to focus and irradiate the glass to form microcracks of um level on the glass.

[0092] Among them, the focal diameter of the target pulsed laser is greater than or equal to 2 um and less than or equal to 20 um; and / or, the focal depth length of the target pulsed laser is greater than or equal to 0.2 mm and less than or equal to 20 mm; and / or, the wavelength of the target pulsed laser is greater than or equal to 350 nm and less than or equal to 1070 nm; and / or, the laser pulse width of the target pulsed laser is greater than or equal to 200 fs and less than or equal to 200 ps.

[0093] It should be noted that the target pulsed laser has the characteristics of high energy and short pulse width. When it focuses and irradiates the glass, it will generate an extremely high energy density in an instant. According to the description in the document, the absorption rate of glass for visible light and near-infrared light beams is extremely low, but the ultrafast laser will produce a strong nonlinear effect within an ultrashort time envelope, causing multi-photon absorption in the glass material.

[0094] In this process of multi-photon absorption, dielectric material carriers are multiplicatively excited through collisions in the multi-photon process, and the laser energy is deposited in the free carrier plasma and then transmitted to the glass material matrix. As the excitation degree increases, when the energy reaches the threshold of the plasma density, it evolves into a liquid and gas phase through electron-lattice coupling.

[0095] Meanwhile, according to the characteristics of the long-depth-of-focus laser distribution, the ultrafast laser forms a self-focusing phenomenon inside the material, intensifying the multi-photon absorption process. The instantaneous high temperature and high pressure cause a volume cavity to form during the entire tunneling process, resulting in a micro-explosion, namely the Coulomb force micro-explosion. When the internal pressure exceeds the mechanical resistance of the material, shock and rarefaction phenomena will occur, compressing the material laterally and axially opening a low-density area on the transmission trajectory of the light beam. These physical processes cause a modified penetration area to form at the point where the glass is irradiated by the laser, and surface micro-cracks with a length in the order of micrometers are formed. By precisely controlling the parameters of the laser and the mode of the focusing component, precise regulation of the glass micro-cracks can be achieved, thereby effectively regulating the strength of the glass.

[0096] This method has the advantages of non-contact etching, avoiding the problems of easy crushing of the glass and obvious etching marks in the traditional contact etching method. At the same time, the strength of the glass can be adjusted according to different requirements, enabling it to have better performance and applicability in various special application scenarios.

[0097] It should be understood that the same or corresponding information in the above different embodiments can be referred to each other.

[0098] It should be understood that the above are only partial or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. Any equivalent structural transformation made using the content of the specification and drawings of the present invention under the overall concept of the present invention, or direct / indirect application in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. An apparatus for adjusting the strength of glass, characterized in that, Comprising: A laser for emitting an initial pulsed laser; A beam expander for expanding and amplifying the initial pulsed laser; A focusing component for focusing and adjusting the focus of the initial pulsed laser after being expanded and amplified by the beam expander to obtain a target pulsed laser, which is used to focus and irradiate on the glass to form microcracks of the order of micrometers on the glass; The focusing component includes: A diffractive axicon that shapes the initial pulsed laser after being expanded and amplified by the beam expander to obtain a non-diffracting laser; A plano-convex lens and an aspherical lens, the plano-convex lens is disposed between the diffractive axicon and the aspherical lens, and the plano-convex lens and the aspherical lens are used to focus the non-diffracting laser to obtain the target pulsed laser; Wherein, the plano-convex lens and the aspherical lens are used to focus the non-diffracting laser to obtain the target pulsed laser, including: The plano-convex lens and the aspherical lens are used to focus the non-diffracting laser at a long depth-of-focus point to obtain the target pulsed laser; The focusing component further includes a mask plate located between the beam expander and the diffractive axicon; At least one coated area is provided on the mask plate, and the coated area is used to block part of the laser irradiated from the beam expander to the diffractive axicon; Wherein, the coated area is further used to segment the long depth-of-focus point, and the relationship between the number of circular rings N of the coated area and the number of segments into which the long depth-of-focus point is divided is: N circular rings = N + 1 segments.

2. The device for adjusting the strength of glass according to claim 1, wherein, The focal diameter of the target pulsed laser is greater than or equal to 2 μm and less than or equal to 20 μm; and / or, The depth of focus length of the target pulsed laser is greater than or equal to 0.2 mm and less than or equal to 20 mm; and / or, The wavelength of the target pulsed laser is greater than or equal to 350 nm and less than or equal to 1070 nm; and / or, The laser pulse width of the target pulsed laser is greater than or equal to 200 fs and less than or equal to 200 ps.

3. The device for adjusting the strength of glass according to claim 1, characterized in that, The number of circles of the coated area provided on the mask plate is greater than or equal to 1 and less than or equal to 20.

4. The device for glass strength adjustment according to claim 1, characterized in that, The focusing component includes a diffractive mirror and a focusing lens; The diffractive mirror is located between the beam expander and the focusing lens, and the diffractive mirror is used to perform phase modulation on the initial pulsed laser after being expanded and amplified by the beam expander to obtain diffracted light with at least one focusing point; The focusing lens is used to focus the diffracted light to obtain the target pulsed laser.

5. The device for adjusting the strength of glass according to claim 4, characterized in that, The number of focusing points of the diffracted light obtained by the phase modulation of the diffractive mirror is greater than or equal to 1 and less than or equal to 20.

6. The device for adjusting the strength of glass according to claim 1, characterized in that, The device for adjusting the glass strength further includes a reflecting mirror disposed between the beam expander and the focusing component; The reflecting mirror is used to reflect the laser of the initial pulsed laser expanded and amplified in the beam expander to the focusing component to adjust the propagation direction of the initial pulsed laser and enter the focusing component to perform intensity adjustment on the initial pulsed laser.

7. A method for adjusting the strength of glass, characterized in that, The method for adjusting the glass strength is applied to the device for adjusting the glass strength according to any one of claims 1-6, and the method for adjusting the glass strength includes: Using a target pulsed laser to focus on irradiating the glass so as to form microcracks at the um level on the glass.

8. The method for adjusting the glass strength according to claim 7, wherein The focal diameter of the target pulsed laser is greater than or equal to 2 um and less than or equal to 20 um; and / or, The depth of focus length of the target pulsed laser is greater than or equal to 0.2 mm and less than or equal to 20 mm; and / or, The wavelength of the target pulsed laser is greater than or equal to 350 nm and less than or equal to 1070 nm; and / or, The laser pulse width of the target pulsed laser is greater than or equal to 200 fs and less than or equal to 200 ps.

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