A functional glass surface stress detection device

Abstract

The utility model discloses a kind of functional glass surface stress detection devices, belong to stress detection relevant technical field, including pedestal, pedestal is provided with light source module, there is polarized light component on light source module, the side of polarized light component is provided with bearing assembly, bearing assembly is set on translation mechanism and can reciprocate along horizontal direction relative to polarized light component, to realize the scanning detection of the full surface of measured glass;Bearing assembly is set above matching liquid tank, there is matching liquid in matching liquid tank, matching liquid tank takes optical window as bottom plate, the upper surface of this optical window simultaneously constitutes vacuum suction surface;Polarized light component is connected with image acquisition and analysis module.This utility model is through the integration of "bearing assembly and matching liquid tank", optical window is both liquid tank bottom plate and vacuum suction surface, reduce the height of device;Translation mechanism and polarized light component are separated arrangement, scanning stroke is far, realize whole piece of glass one-time detection, shorten detection time.

Description

Technical Field

[0001] This utility model belongs to the field of stress detection technology, specifically a functional glass surface stress detection device. Background Technology

[0002] With the rapid development of industries such as smart terminals, automotive displays, photovoltaic cover plates, and semiconductor packaging, ultra-thin and ultra-large functional glass (such as tempered glass, microcrystalline glass, and sapphire cover plates) is widely used. During chemical strengthening, hot bending, or coating processes, these glasses inevitably generate residual surface stress. If the residual stress is unevenly distributed or excessively high, it will directly lead to microcracks, warping, optical distortion, and even subsequent explosion failure during use. Therefore, high-precision, large-area, rapid, and non-destructive testing of the surface stress of functional glass has become a core requirement for quality control in the industry chain.

[0003] In existing technologies, the following two methods are mainly used for stress detection on glass surfaces: One type is the contact stress gauge, which measures local displacement by attaching a probe or strain gauge to the glass surface. It requires direct contact, is easily scratched, and can only take discrete points, resulting in low efficiency and inability to be used for ultra-thin or coated glass.

[0004] Second, there is the optical photoelastic stress meter, which uses polarized light to penetrate glass to generate phase delay to calculate stress. The whole machine is expensive and difficult to focus. During scanning, the stroke is either short or the liquid tank shakes. In addition, the vacuum hole is fixed, making it difficult to be compatible with glass of different sizes and unable to achieve rapid detection of the entire surface in one go.

[0005] Therefore, there is an urgent need for a new type of functional glass surface stress detection device to solve the above problems. Utility Model Content

[0006] To address the above problems, this utility model provides a functional glass surface stress detection device to solve the technical problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A functional glass surface stress detection device includes a base, a light source module mounted on the base, a polarization beam splitter mounted on the light source module, a support component mounted on one side of the polarization beam splitter, and the support component mounted on a translation mechanism that can reciprocate horizontally relative to the polarization beam splitter to achieve scanning detection of the entire surface of the glass under test. The support component is positioned above a matching liquid tank containing matching liquid, with an optical window as its base, the upper surface of which also forms the vacuum adsorption surface. The polarization beam splitter is connected to an image acquisition and analysis module.

[0008] As a further improvement to the above solution, the translation mechanism includes a mounting base, on which a motor is mounted. The output end of the motor is connected to a ball screw. A sliding block is mounted on the ball screw via a slider. A moving plate is mounted on the sliding block. The sliding block is mounted on a guide rail, which is positioned opposite to the guide rail. The moving plate is configured as an L-shaped structure and is equipped with a load-bearing component.

[0009] As a further improvement to the above scheme, the light source module is set on a three-point adjustable lens mount, which is mounted on a fixed plate, and the light source module is a semiconductor laser with a wavelength of 633nm.

[0010] As a further improvement to the above solution, the fixing plate is set on the second slide, the second slide slide slides up and down on the second dovetail groove, the second dovetail groove is set on the first slide, and the first slide is set on the first dovetail groove.

[0011] As a further improvement to the above solution, the image acquisition and analysis module includes a CMOS camera and a processor, with the processor having a built-in stress calculation algorithm based on the photoelastic effect.

[0012] As a further improvement to the above scheme, multiple vacuum adsorption holes are provided on the vacuum adsorption surface.

[0013] As a further improvement to the above scheme, the optical window is made of low-stress synthetic quartz glass with stress birefringence ≤0.4 nm / cm, double-sided parallelism ≤1″, and transmittance ≥98%.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a functional glass surface stress detection device. Through the "integrated design of the bearing component and matching liquid tank", the optical window is both the bottom plate of the liquid tank and the vacuum adsorption surface, eliminating the traditional two-layer structure and reducing the height of the device. The translation mechanism and the polarization beam splitter are arranged separately, which stabilizes the optical path and extends the scanning distance, enabling the entire glass to be detected at one time and shortening the detection time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the base, light source module, and polarization beam splitter in this utility model.

[0017] Figure 3 This is a schematic diagram of the glass to be tested, the vacuum adsorption surface, the matching liquid tank, and the matching liquid in this utility model.

[0018] In the diagram: 10, base; 20, light source module; 21, fixing plate; 22, first dovetail groove; 23, first slide; 24, second dovetail groove; 25, second slide; 30, polarization beam splitting component; 40, bearing component; 41, vacuum adsorption surface; 411, vacuum adsorption hole; 42, translation mechanism; 421, mounting base; 422, motor; 423, ball screw; 424, guide rail; 425, moving plate; 426, sliding block; 427, slider; 50, matching liquid tank; 51, optical window; 60, matching liquid. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0020] like Figure 1-3 As shown, the specific solution of this embodiment is as follows: a functional glass surface stress detection device includes a base 10, a light source module 20 is disposed on the base 10, a polarization beam splitter 30 is disposed on the light source module 20, a support component 40 is disposed on one side of the polarization beam splitter 30, the support component 40 is disposed on a translation mechanism 42 and can reciprocate in the horizontal direction relative to the polarization beam splitter 30 to realize scanning detection of the entire surface of the glass G under test; the support component 40 is disposed above a matching liquid tank 50, a matching liquid 60 is disposed in the matching liquid tank 50, the matching liquid tank 50 is based on an optical window 51, and the upper surface of the optical window 51 also constitutes a vacuum adsorption surface 41; the polarization beam splitter 30 is connected to an image acquisition and analysis module.

[0021] As a preferred embodiment of the above, the translation mechanism 42 includes a mounting base 421, on which a motor 422 is mounted. The output end of the motor 422 is connected to a ball screw 423. A sliding block 426 is mounted on the ball screw 423 via a slider 427. A moving plate 425 is mounted on the sliding block 426. The sliding block 426 is mounted on a guide rail 424, which is arranged opposite to the guide rail 424. The moving plate 425 is configured with an L-shaped structure and a bearing component 40 is mounted on the moving plate 425.

[0022] As a preferred embodiment of the above, the light source module 20 is disposed on a three-point adjustable lens frame, the three-point adjustable lens frame is disposed on a fixed plate 21, and the light source module 20 is a semiconductor laser with a wavelength of 633nm.

[0023] As a preferred embodiment of the above, the fixing plate 21 is disposed on the second slide 25, the second slide 25 is disposed on the second dovetail groove 24 and slides up and down, the second dovetail groove 24 is disposed on the first slide 23, and the first slide 23 is disposed on the first dovetail groove 22.

[0024] The first slide 23 has an integral dovetail-shaped guide rail at the bottom (i.e., the slider part of the first dovetail groove 22), which mates with the first dovetail groove 22 on the base 10; coarse / fine adjustment in the X direction is achieved by the fine thread screw or micro head on the side, and after adjustment, it is locked with the set screw, thereby fixing the first slide 23 in any desired position.

[0025] The second slide 25 is also machined into a dovetail-shaped slider and is embedded in the second dovetail groove 24 machined on the upper surface of the first slide 23. The side of the second dovetail groove 24 is also equipped with a fine-tooth screw. Rotating the screw can drive the second slide 25 to slide precisely in the Z direction (up and down) relative to the first slide 23. After it is in place, it is positioned and fixed by the self-locking thread of the same screw or an additional locking screw.

[0026] The "dovetail groove" provides high-precision linear guidance with low friction and torsion resistance; the "fine-tooth screw / micrometer head" simultaneously performs the triple functions of driving, positioning and locking; the two-stage dovetail grooves are arranged perpendicularly to each other, enabling the light source module 20 to achieve two-dimensional coarse-fine adjustment in the XZ plane, and can be completely locked after adjustment to ensure long-term stability.

[0027] As a preferred embodiment of the above, the image acquisition and analysis module includes a CMOS camera and a processor, the processor having a built-in stress calculation algorithm based on the photoelastic effect.

[0028] As a preferred embodiment of the above, the vacuum adsorption surface 41 is provided with a plurality of vacuum adsorption holes.

[0029] As a preferred embodiment of the above, the material of the optical window 51 is low-stress synthetic quartz glass, with stress birefringence ≤0.4nm / cm, double-sided parallelism ≤1″, and transmittance ≥98%.

[0030] Working principle: The process involves using 633nm linearly polarized light coupled into the glass surface via a matching liquid → stress-induced birefringence → polarization state change → the polarization beam splitter converts the change into a CMOS image → the photoelastic algorithm calculates the two-dimensional stress distribution in real time; throughout the process, the glass undergoes a one-dimensional scan driven by a ball screw along with the supporting component, achieving full-area non-destructive testing.

[0031] Work process (in chronological order) 1. Mounting the film The glass G to be tested is placed face down on the vacuum adsorption surface 41 (i.e., the upper surface of the optical window 51).

[0032] When the vacuum is activated, the matrix-style vacuum adsorption holes 411 firmly fix the glass around its perimeter, while ensuring that only 1–2 mm of matching liquid 60 layers remain between the glass and the window.

[0033] 2. Dimming (one-time use) By adjusting the pitch / sway of the light source module 20 through the three-point adjustable frame, the 633nm linearly polarized beam passes vertically downward through the optical window 51 → matching liquid 60 → glass G after passing through the polarization beam splitter 30.

[0034] The first slide 23 (X direction) and the second slide 25 (Z direction) further coarse / fine focus to ensure that the light spot falls on the center of the glass surface.

[0035] 3. Scanning detection Motor 422 drives ball screw 423, which in turn drives slider 427, sliding block 426 and L-shaped moving plate 425 to perform horizontal reciprocating motion. The glass and matching liquid tank 50 move synchronously with the moving plate 425, while the light source module 20 and polarization beam splitter 30 remain stationary, realizing line scanning with "light stationary, plate moving".

[0036] 4. Signal Acquisition The stress on the glass surface causes a phase difference Δφ in the returning beam.

[0037] The Wollaston prism within the polarization beam splitter 30 separates the orthogonal polarization components and simultaneously forms two interference patterns on the CMOS camera.

[0038] CMOS real-time acquisition, the image is solved line by line by line using the built-in photoelastic algorithm of the processor, Δφ→σ.

[0039] 5. Results Output After scanning, the processor stitches the multi-line stress maps into a full-width two-dimensional distribution map, automatically labeling the maximum stress, average stress, and gradient.

[0040] It should be noted that, in this document, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A functional glass surface stress detection device, comprising a base (10), a light source module (20) is arranged on the base (10), a polarization light splitting assembly (30) is arranged on the light source module (20), and a bearing assembly (40) is arranged on one side of the polarization light splitting assembly (30), characterized in that, The carrier component (40) is mounted on the translation mechanism (42) and can reciprocate in the horizontal direction relative to the polarization beam splitter component (30) to achieve scanning detection of the entire surface of the glass (G) under test; the carrier component (40) is mounted above the matching liquid tank (50), which contains matching liquid (60). The matching liquid tank (50) has an optical window (51) as its base plate, and the upper surface of the optical window (51) also forms a vacuum adsorption surface (41); the polarization beam splitter component (30) is connected to the image acquisition and analysis module.

2. The functional glass surface stress detection device according to claim 1, characterized in that, The translation mechanism (42) includes a mounting base (421), on which a motor (422) is mounted. The output end of the motor (422) is connected to a ball screw (423). A sliding block (426) is mounted on the ball screw (423) via a slider (427). A moving plate (425) is mounted on the sliding block (426). The sliding block (426) is mounted on a guide rail (424), which is positioned opposite to the guide rail. The moving plate (425) is configured as an L-shaped structure, and a load-bearing component (40) is mounted on the moving plate (425).

3. The functional glass surface stress detection device according to claim 1, characterized in that, The light source module (20) is set on the three-point adjustable frame, which is set on the fixed plate (21).

4. The functional glass surface stress detection device according to claim 1, characterized in that, The fixing plate (21) is set on the second slide (25), the second slide (25) slides up and down on the second dovetail groove (24), the second dovetail groove (24) is set on the first slide (23), and the first slide (23) is set on the first dovetail groove (22).

5. The functional glass surface stress detection device according to claim 1, characterized in that, The image acquisition and analysis module includes a CMOS camera and a processor, with the processor having a built-in stress calculation algorithm based on the photoelastic effect.

6. The functional glass surface stress detection device according to claim 1, characterized in that, Multiple vacuum adsorption holes (411) are provided on the vacuum adsorption surface (41).

7. The functional glass surface stress detection device according to claim 1, characterized in that, The optical window (51) is made of low-stress synthetic quartz glass.

Images