Imaging device and defect detection apparatus

Abstract

The utility model discloses an imaging device and defect detection equipment, and belongs to the technical field of screen detection. The imaging device comprises a bracket, a first imaging module and a second imaging module, wherein a natural light source is arranged on the bracket; the first imaging module is mounted on the bracket and is used for obtaining an image of the first imaging area according to the light beam and splitting the light beam; the second imaging module is installed on the first imaging module, and the second imaging module is used for obtaining an image of the second imaging area according to the light beam after light splitting. The first imaging module and the second imaging module are arranged, and the natural light source is utilized to simultaneously obtain images corresponding to the first imaging area and the second imaging area at different heights, so that subsequent layered judgment on the defects of the to-be-detected screen is realized; moreover, the debugging steps required by the height change during the layered imaging of the to-be-detected screen by using a single imaging module can be reduced, the imaging and detection efficiency is improved, the service life of the to-be-detected screen is prolonged, and the detection and manufacturing cost is reduced.

Description

Technical Field

[0001] The present application belongs to the field of screen detection technology, and in particular, relates to an imaging device and defect detection equipment. Background Art

[0002] With the rapid progress of science and technology and industry, the requirements for screen resolution and process level are constantly increasing, and the quality inspection technology for screens is also constantly improving. Considering that the screen is generally formed by glass and multiple layers of film stacking, there are often two types of defects in the screen during quality inspection. The first is the defect caused by foreign matter mixed into the glass and film itself during processing or damage. This defect can only be solved by replacing the glass or film. The second is that the surface of the glass or film is dirty or attached with dust. This defect can be solved by cleaning the surface of the glass or film.

[0003] Therefore, ultraviolet light sources and ultraviolet cameras are often used to achieve defect layer detection, that is, to clarify whether the defect is located on the upper surface, lower surface or inside of the glass, so as to improve the pass rate of the screen and reduce manufacturing costs. However, on the one hand, based on the wavelength characteristics of ultraviolet light sources, compared with natural light sources, using ultraviolet light sources to detect the screen surface will accelerate the aging of the screen and reduce the service life of the screen; on the other hand, the cost of ultraviolet cameras is relatively high, which further increases the manufacturing cost. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an imaging device and a defect detection device, which can realize the subsequent layered judgment of the defects of the screen to be tested by setting a first imaging module and a second imaging module, and using a natural light source to simultaneously obtain images of the first imaging area and the second imaging area at different heights, and can reduce the debugging steps required for layered imaging of the screen to be tested due to its height change when using a single imaging module, improve imaging and detection efficiency, extend the service life of the screen to be tested, and reduce detection and manufacturing costs.

[0005] In a first aspect, the present application provides an imaging device for performing imaging detection on a screen to be tested, wherein the screen to be tested has a first imaging area and a second imaging area that are different in height direction, and the imaging device comprises:

[0006] A bracket, wherein a natural light source is disposed on the bracket, and the natural light source is used to emit a light beam to the screen to be tested;

[0007] A first imaging module, mounted on the bracket, and used for obtaining an image of the first imaging area according to the light beam and splitting the light beam;

[0008] The second imaging module is installed on the first imaging module, and the second imaging module is used to obtain an image of the second imaging area according to the split light beam.

[0009] According to the imaging device of the present application, by setting the first imaging module and the second imaging module to simultaneously obtain the images corresponding to the first imaging area and the second imaging area at different heights, the subsequent layered judgment of the defects of the screen to be tested can be realized, and the debugging steps required for layered imaging of the screen to be tested due to the height change when using a single imaging module can be reduced, thereby improving the imaging and detection efficiency. In addition, since natural light sources are used, the corresponding first imaging module and the second imaging module only need to have the ability to capture natural light source imaging, which not only prolongs the service life of the screen to be tested, but also reduces the detection and manufacturing costs.

[0010] According to one embodiment of the present application, the first imaging module includes:

[0011] A first adapter tube, wherein a semi-transparent and semi-reflective mirror is disposed in the first adapter tube;

[0012] An imaging lens is mounted on one end of the first adapter tube;

[0013] The first camera is installed at the other end of the first adapter tube, the semi-transparent and semi-reflective mirror is located between the imaging lens and the first camera along the height direction, and the angle between the surface of the semi-transparent and semi-reflective mirror and the optical axis of the light beam is 45°.

[0014] According to an embodiment of the present application, two ends of the first adapter tube are respectively engaged with the imaging lens and the first camera.

[0015] According to one embodiment of the present application, the second imaging module includes:

[0016] A second adapter tube, wherein one end of the second adapter tube is detachably connected to the middle portion of the first adapter tube;

[0017] A parallel plate, one end of which is detachably connected to the other end of the second adapter tube;

[0018] A second camera is detachably connected to the other end of the parallel plate.

[0019] According to one embodiment of the present application, a snap-in groove is provided on the side wall of the first adapter tube, the snap-in groove and the semi-transparent and semi-reflective mirror are arranged opposite to each other, and the outer wall of the second adapter tube and the inner wall of the snap-in groove are threadedly connected or snap-fitted.

[0020] According to one embodiment of the present application, the thickness of the parallel flat plates is adjustable.

[0021] According to an embodiment of the present application, the second imaging area includes different inspection areas at least along the height direction, and the number of the second imaging modules is at least two and corresponds one-to-one to the inspection areas.

[0022] According to an embodiment of the present application, the natural light source and the first imaging module are located on the same side of the screen to be tested along the height direction; or

[0023] The natural light source and the first imaging module are located at two opposite sides of the screen to be tested along the height direction.

[0024] According to an embodiment of the present application, the screen to be tested includes a first protective layer, a glass layer, and a second protective layer stacked in sequence from top to bottom, and the first imaging area and the second imaging area are the upper surface and the lower surface of the glass layer, respectively.

[0025] In a second aspect, the present application provides a defect detection device, the defect detection device comprising:

[0026] The imaging device as described above; and

[0027] A controller is communicatively connected with the imaging device and is used to determine the height of the defect of the screen to be tested according to the image of the first imaging area and the image of the second imaging area.

[0028] According to the defect detection equipment of the present application, by setting the first imaging module and the second imaging module in the imaging device, and using natural light source to simultaneously obtain images of the first imaging area and the second imaging area at different heights, the subsequent layered judgment of the defects of the screen to be tested can be realized, and the debugging steps required for layered imaging of the screen to be tested due to its height change when using a single imaging module can be reduced, thereby improving the imaging and detection efficiency, extending the service life of the screen to be tested, and reducing the detection and manufacturing costs.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a schematic structural diagram of a first imaging device provided in an embodiment of the present application;

[0032] Figure 2 is an exploded diagram of the first imaging device provided in an embodiment of the present application;

[0033] Figure 3It is a schematic structural diagram of the second imaging device provided in an embodiment of the present application.

[0034] Reference numerals:

[0035] 100, first imaging module; 110, first adapter tube; 120, imaging lens; 130, first camera;

[0036] 200, second imaging module; 210, second adapter tube; 220, parallel plate; 230, second camera. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0038] Reference below Figure 1-Figure 3 The imaging device provided in the embodiment of the present application is described, and the imaging device is used to perform imaging detection on a screen to be tested, and the screen to be tested has a first imaging area and a second imaging area that are different in height direction. The imaging device includes a bracket, a first imaging module 100 and a second imaging module 200.

[0039] It should be noted that the projections of the first imaging area and the second imaging area along the height direction overlap, and the distance between the first imaging area and the second imaging area can be set according to the specifications of the screen to be tested and the detection requirements, which is not limited in this embodiment.

[0040] A natural light source is provided on the bracket, and the natural light source is used to emit a light beam to the screen to be tested. The bracket includes but is not limited to plastic, stainless steel, aluminum alloy or titanium alloy. The natural light source includes but is not limited to a white light source, and this embodiment does not specifically limit this as long as the wavelength range of the natural light source is 430-760nm, that is, the natural light source is a visible light source. The connection method between the natural light source and the bracket includes but is not limited to bolt connection, rivet connection or snap connection.

[0041] It can be understood that the light beam emitted by the natural light source is directed directly to the upper surface or the lower surface of the screen to be measured, so as to improve the optical utilization of the light beam as much as possible.

[0042] The first imaging module 100 is mounted on the bracket, and is used to obtain an image of the first imaging area according to the light beam and split the light beam. The connection between the first imaging module 100 and the bracket includes but is not limited to bolt connection, rivet connection or snap connection.

[0043] It is understandable that the light beam emitted from the screen to be tested is captured by the first imaging module 100 to obtain an image of the first imaging area of ​​the screen to be tested, so as to accurately obtain the defect status of the first imaging area of ​​the screen to be tested.

[0044] The second imaging module 200 is mounted on the first imaging module 100, and is used to obtain an image of the second imaging area according to the split light beam. The connection between the second imaging module 200 and the bracket includes but is not limited to bolt connection, rivet connection or snap connection.

[0045] It is understandable that the second imaging module 200 captures the light beam emitted from the screen to be tested and split by the first imaging module 100 to obtain the image of the second imaging area, so as to accurately obtain the defect situation of the second imaging area of ​​the screen to be tested. That is, by setting the first imaging module 100 and the second imaging module 200 to simultaneously obtain the images corresponding to the first imaging area and the second imaging area at different heights, the subsequent layered judgment of the defects of the screen to be tested can be realized, and the debugging steps required for the layered imaging of the screen to be tested due to the height change when using a single imaging module can be reduced, thereby improving the imaging and detection efficiency. In addition, since natural light sources are used, the corresponding first imaging module 100 and the second imaging module 200 only need to have the ability to capture natural light source imaging, which not only extends the service life of the screen to be tested, but also reduces the detection and manufacturing costs.

[0046] According to the imaging device provided in the embodiment of the present application, by setting the first imaging module 100 and the second imaging module 200, and using natural light sources to simultaneously obtain images corresponding to the first imaging area and the second imaging area at different heights, the subsequent layered judgment of the defects of the screen to be tested can be achieved, and the debugging steps required for layered imaging of the screen to be tested due to its height change when using a single imaging module can be reduced, thereby improving the imaging and detection efficiency, extending the service life of the screen to be tested, and reducing the detection and manufacturing costs.

[0047] In some embodiments, Figures 1 to 3As shown, the first imaging module 100 includes a first adapter tube 110, an imaging lens 120 and a first camera 130, and a semi-transparent and semi-reflective mirror is arranged in the first adapter tube 110; the imaging lens 120 is installed at one end of the first adapter tube 110; the first camera 130 is installed at the other end of the first adapter tube 110, the semi-transparent and semi-reflective mirror is located between the imaging lens 120 and the first camera 130 along the height direction, and the angle between the surface of the semi-transparent and semi-reflective mirror and the optical axis of the light beam is 45°. It should be noted that the connection directions between the semi-transparent and semi-reflective mirror and the first adapter tube 110, the connection between the imaging lens 120 and the first adapter tube 110, and the connection between the first camera 130 and the first adapter tube 110 include but are not limited to threaded connection and snap-on connection. The first camera 130 includes but is not limited to a high-speed array camera.

[0048] It should be noted that the angle between the surface of the semi-transparent and semi-reflective mirror and the optical axis of the light beam is 45°, that is, the semi-transparent and semi-reflective mirror is a 45-degree semi-transparent and semi-reflective mirror, so that a part of the light beam can be reflected to the second imaging module 200, and the rest passes through the semi-transparent and semi-reflective mirror to the first camera 130, so as to make full use of the light beam and improve optical efficiency.

[0049] It can be understood that since a semi-transparent and semi-reflective mirror is arranged in the first adapter tube 110, the light beam passes through the imaging lens 120 and is divided into two beams by the semi-transparent and semi-reflective mirror, that is, one light beam is transmitted from the semi-transparent and semi-reflective mirror to the first camera 130 so that the first camera 130 obtains an image of the first imaging area formed by the imaging lens 120, and the other light beam is reflected from the semi-transparent and semi-reflective mirror to the second imaging module 200 to obtain an image of the second imaging area.

[0050] It should be noted that the imaging lens 120 is a lens with a small depth of field, so that the clear range of the image is limited, that is, the first camera 130 can only obtain a clear image of the first imaging area, but cannot obtain clear images of areas at other heights in the screen to be tested.

[0051] In some embodiments, Figures 1 to 3 As shown, the two ends of the first adapter tube 110 are respectively engaged with the imaging lens 120 and the first camera 130. That is, the lower outer wall of the first adapter tube 110 and the upper outer wall of the imaging lens 120 are in contact, and the upper outer wall of the first adapter tube 110 and the lower outer wall of the first camera 130 are in contact, so that the first imaging module 100 can be easily maintained.

[0052] In some embodiments, Figures 1 to 3As shown, the second imaging module 200 includes a second adapter tube 210, a parallel plate 220, and a second camera 230, and one end of the second adapter tube 210 is detachably connected to the middle of the first adapter tube 110; one end of the parallel plate 220 is detachably connected to the other end of the second adapter tube 210; and the second camera 230 is detachably connected to the other end of the parallel plate 220. It should be noted that the connection directions between the second adapter tube 210 and the first adapter tube 110, the connection between the parallel plate 220 and the second adapter tube 210, and the connection between the parallel plate 220 and the second camera 230 include but are not limited to threaded connection and snap connection. The second camera 230 is but is not limited to a high-speed array camera.

[0053] It can be understood that the parallel plate 220 receives the light beam reflected by the semi-transparent mirror, and because the parallel plate 220 has a certain thickness, when the light beam passes through the parallel plate 220, it will be refracted, so that there will be an optical path difference change related to the thickness and refractive index of the parallel plate 220, thereby changing the imaging height, and achieving that although the same imaging lens 120 is used, the image of the second imaging area can be obtained through the second camera 230. It should be noted that the thickness of the parallel plate 220 can be adjusted according to the distance between the imaging lens 120 and the screen to be measured, and this embodiment does not impose specific restrictions on this.

[0054] In some embodiments, Figures 1 to 3 As shown, the axial direction of the first adapter tube 110 is perpendicular to the axial direction of the second adapter tube 210, and the two ends of the second adapter tube 210 are respectively engaged with the parallel plate 220 and the first adapter tube 110, and the end of the parallel plate 220 away from the second adapter tube 210 is engaged with the second camera 230, thereby facilitating the maintenance of the second imaging module 200.

[0055] In this embodiment, Figures 1 to 3 As shown, a snap-in groove is provided on the side wall of the first adapter tube 110, and the snap-in groove and the semi-transparent and semi-reflective mirror are arranged opposite to each other, and the outer wall of the second adapter tube 210 and the inner wall of the snap-in groove are threadedly connected or snap-fitted.

[0056] It can be understood that the snap-in slot is provided on the middle outer wall of the first adapter tube 110, that is, the light beam reflected by the semi-transparent and semi-reflective mirror enters the second adapter tube 210 through the snap-in slot and irradiates the parallel plate 220, so that the second camera 230 can take pictures and obtain the image of the second imaging area. It should be noted that the shape and size of the snap-in slot can be adaptively adjusted according to the shape of the second adapter tube 210, and this embodiment does not impose specific restrictions on this.

[0057] In some embodiments, the thickness of the parallel plates 220 is adjustable.

[0058] It is understandable that, since the distance between the second imaging area and the first imaging area varies, the specific height of the second imaging area of ​​the screen to be measured can be changed by changing the thickness of the parallel plate 220, thereby further improving the use range of the imaging device. It should be noted that the adjustable thickness of the parallel plate 220 can be achieved by selecting parallel plates 220 of different thicknesses, and this embodiment does not impose any specific limitation on this.

[0059] In some embodiments, Figure 3 As shown, the second imaging area includes different inspection areas at least along the height direction, and there are at least two second imaging modules 200 corresponding to the inspection areas one by one.

[0060] It can be understood that at least two second imaging modules 200 are arranged on the first adapter tube 110 at intervals along the height direction, there are at least two semi-transparent and semi-reflective mirrors and they correspond one-to-one to the second imaging modules 200, and the thickness of the parallel plates 220 of each second imaging module 200 is different, thereby realizing the images of at least two inspection areas at the same time, so as to further improve the flexibility and versatility of the use of the imaging device.

[0061] In some embodiments, the natural light source and the first imaging module 100 are located on the same side of the screen to be tested along the height direction; or the natural light source and the first imaging module 100 are located on opposite sides of the screen to be tested along the height direction.

[0062] It is understandable that no matter the natural light source and the first imaging module 100 are respectively located above and below the screen to be tested, or both are located above or below the screen to be tested, as long as it can be ensured that the light beam emitted by the natural light source is directly facing the upper surface or lower surface of the screen to be tested, this embodiment does not impose any specific restrictions on this.

[0063] In some embodiments, the screen to be tested includes a first protective layer, a glass layer, and a second protective layer stacked in sequence from top to bottom, and the first imaging area and the second imaging area are the upper surface and the lower surface of the glass layer, respectively.

[0064] It can be understood that the image of the first imaging area is obtained by the first camera 130 to determine the defect position and determine the defect type on the upper surface of the glass layer, and the image of the second imaging area is obtained by the second camera 230 to determine the defect position and determine the defect type on the lower surface of the glass layer, thereby realizing layered detection of the screen to be tested to improve the detection accuracy.

[0065] The embodiment of the present application also provides a defect detection device, which includes the above-mentioned imaging device and a controller, wherein the controller is in communication with the imaging device and is used to determine the height of the defect of the screen to be tested based on the image of the first imaging area and the image of the second imaging area.

[0066] It is understandable that the controller has built-in programming software such as machine vision or deep learning, so that defects can be identified based on the received images of the first imaging area and the second imaging area, thereby determining the specific location and type of each defect, reducing the possibility of misjudgment of defects and improving detection accuracy.

[0067] According to the defect detection equipment provided in the embodiment of the present application, by setting the first imaging module 100 and the second imaging module 200 in the imaging device, and using natural light source to simultaneously obtain images of the first imaging area and the second imaging area at different heights, subsequent layered judgment of defects of the screen to be tested can be achieved, and the debugging steps required for layered imaging of the screen to be tested due to its height change when using a single imaging module can be reduced, thereby improving imaging and detection efficiency, extending the service life of the screen to be tested, and reducing detection and manufacturing costs.

[0068] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0071] In the description of the present application, “plurality” means two or more.

[0072] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0073] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An imaging device for performing imaging detection on a screen to be tested, wherein the screen to be tested has a first imaging area and a second imaging area which are different in height direction, characterized in that: include: A bracket, wherein a natural light source is disposed on the bracket, and the natural light source is used to emit a light beam to the screen to be tested; A first imaging module (100) is mounted on the bracket, and the first imaging module (100) is used to obtain an image of the first imaging area according to the light beam and to split the light beam; The second imaging module (200) is installed on the first imaging module (100), and the second imaging module (200) is used to obtain an image of the second imaging area according to the split light beam.

2. The imaging device according to claim 1, characterized in that The first imaging module (100) comprises: A first adapter tube (110), wherein a semi-transparent and semi-reflective mirror is arranged inside the first adapter tube (110); An imaging lens (120) is mounted on one end of the first adapter tube (110); The first camera (130) is installed at the other end of the first adapter tube (110), the semi-transparent and semi-reflective mirror is located between the imaging lens (120) and the first camera (130) in the height direction, and the angle between the surface of the semi-transparent and semi-reflective mirror and the optical axis of the light beam is 45°.

3. The imaging device according to claim 2, characterized in that The two ends of the first adapter tube (110) are respectively snap-fitted with the imaging lens (120) and the first camera (130).

4. The imaging device according to claim 2, characterized in that: The second imaging module (200) comprises: A second adapter tube (210), wherein one end of the second adapter tube (210) is detachably connected to the middle portion of the first adapter tube (110); A parallel plate (220), one end of the parallel plate (220) being detachably connected to the other end of the second adapter tube (210); A second camera (230), wherein the second camera (230) is detachably connected to the other end of the parallel plate (220).

5. The imaging device according to claim 4, characterized in that The side wall of the first adapter tube (110) is provided with a snap-in groove, the snap-in groove and the semi-transparent and semi-reflective mirror are arranged opposite to each other, and the outer wall of the second adapter tube (210) and the inner wall of the snap-in groove are threadedly connected or snap-fitted.

6. The imaging device according to claim 4, characterized in that The thickness of the parallel flat plate (220) is adjustable.

7. The imaging device according to any one of claims 1 to 6, characterized in that: The second imaging area comprises different inspection areas at least along the height direction, and the number of the second imaging modules (200) is at least two and corresponds one-to-one to the inspection areas.

8. The imaging device according to any one of claims 1 to 6, characterized in that: The natural light source and the first imaging module (100) are located on the same side of the screen to be tested along the height direction; or The natural light source and the first imaging module (100) are located on opposite sides of the screen to be tested along the height direction.

9. The imaging device according to any one of claims 1 to 6, characterized in that: The screen to be tested comprises a first protective layer, a glass layer, and a second protective layer stacked in sequence from top to bottom, and the first imaging area and the second imaging area are respectively the upper surface and the lower surface of the glass layer.

10. A defect detection device, characterized in that: include: The imaging device according to any one of claims 1 to 9; as well as A controller is communicatively connected with the imaging device and is used to determine the height of the defect of the screen to be tested according to the image of the first imaging area and the image of the second imaging area.

Images