A detection device and a detection equipment

Abstract

The present application provides a detection device, including a light source device configured to emit a detection beam to a region to be measured and its peripheral region. The detection beam is incident on the region to be measured and its peripheral region in a direction perpendicular to the object to be measured. The detection beam passes through the peripheral region to form a re-inspection beam; a reflection element having a reflection surface parallel to the object to be measured, the reflection surface being configured to reflect at least part of the re-inspection beam to the peripheral region, and the re-inspection beam passes through the peripheral region to form a first signal light; and a detection device configured to receive the signal light, the signal light including the first signal light exiting from the peripheral region in a direction perpendicular to the object to be measured. Through the above arrangement, the detection beam emitted by the light source device can form a signal light after being reflected, refracted or scattered by the object to be measured and is collected by the detection device to form a clear contour map, thereby improving the detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection, and particularly relates to a detection device and a detection equipment. Background Art

[0002] With the rapid development of electronic information technology, the speed of mobile phone replacement is getting faster and faster, including changes in software and hardware. For example, the curved mobile phone screen has become a development trend, among which, the ultra-curved ring screen has attracted more and more attention from mobile phone manufacturers.

[0003] In view of the development trend of mobile phone screens, the existing optical detection technology can no longer meet the requirements. When detecting the edge of a curved screen, especially an ultra-curved ring screen, the current optical detection instrument cannot clearly image the edge of the curved screen, resulting in a reduction in the accuracy of optical detection results.

[0004] How to accurately detect the curved mobile phone screen is an urgent problem to be solved at present. Summary of the Invention

[0005] In view of the disadvantage that the existing optical detection technology cannot clearly image the edge of a curved screen, the present invention provides a detection device, including: a light source device for emitting a detection beam to a to-be-tested area and its peripheral area, the detection beam being incident on the to-be-tested area and its peripheral area in a direction perpendicular to the to-be-tested object, the detection beam passing through the peripheral area to form a re-inspection beam, and the to-be-tested area being used to change the propagation direction of the detection beam; a reflection element having a reflection surface, the central axis of the detection beam being perpendicular to the reflection element, the reflection surface being used to reflect at least part of the re-inspection beam to the peripheral area, and the re-inspection beam passing through the peripheral area to form a first signal light; and a detection device for receiving the signal light, the signal light including the first signal light exiting from the peripheral area in a direction perpendicular to the reflection surface, to form detection information.

[0006] Through the above settings, the detection beam emitted by the light source device is incident on the to-be-tested area and its peripheral area. Part of the detection light is reflected by the surface of the to-be-tested object to form part of the signal light, and part of the detection light passes through the peripheral area to form a re-inspection beam that passes through the peripheral area and irradiates the reflection surface to form a re-inspection beam. Part of the re-inspection beam forms a first signal light through the peripheral area. The detection device receives the signal light, especially the first signal light exiting from the peripheral area in a direction perpendicular to the to-be-tested object, thereby being able to improve the contrast of the image and the accuracy of detection.

[0007] In one embodiment, the light source device includes a light source and a beam splitter. The beam splitter is disposed on the optical path between the light source and the object to be measured, and is configured to irradiate the detection beam emitted by the light source onto the edge of the object to be detected. With the above arrangement, the detection device has the advantage of small size.

[0008] In one embodiment, the light source is an LED light source array, and the beam splitter is a semi-transmissive and semi-reflective mirror.

[0009] In one embodiment, the beam splitter is configured to reflect the detection beam emitted by the light source and transmit the signal light; alternatively, the beam splitter is configured to transmit the detection beam emitted by the light source and reflect the signal light.

[0010] In one embodiment, the detection device further includes a bearing surface for placing the object to be measured. The light source device and the reflection element are respectively located on two sides of the bearing surface, and the light source device and the detection device are located on the same side of the bearing surface. The optical axis of the detection device is perpendicular to the reflection surface, or the light-emitting surface of the light source is parallel to the reflective surface.

[0011] In one embodiment, the optical axis of the detection device is perpendicular to the reflection surface. The light source device is located between the detection device and the reflection element. The light source device has an end face close to the bearing surface, and the distance between the end face and the bearing surface is 150 - 170 mm, and the distance between the bearing surface and the reflection surface is 18 - 22 mm.

[0012] In one embodiment, the detection beam perpendicular to the reflection surface has a central beam at the center. The central beam and the optical axis of the detection device pass through the same straight line.

[0013] In one embodiment, the area to be measured includes the edge line of the edge of the object to be measured or the edge line of a hole. The peripheral area includes the area of the object to be measured on one side of the edge line, and / or the spatial area on the other side of the edge line.

[0014] In one embodiment, the angle between the outer normal at at least one point on the surface of the object to be measured and the reflection surface is less than 20°.

[0015] In one embodiment, the peripheral area includes the area of the object to be measured, and the peripheral area is a light-transmissive material or a light-opaque material with respect to the detection beam.

[0016] In one embodiment, the reflection element is a specular reflector.

[0017] In one embodiment, the light source device includes a telecentric collimated light source. With the above arrangement, the parallelism of the detection beam emitted by the light source device is higher.

[0018] In one embodiment, the reflective element is annular.

[0019] In one embodiment, the object to be measured includes: a central region, and the region to be measured is located on the periphery of the central region; it further includes: a platform; and a support member located on the platform, the support member being used to support the central region of the object to be measured, the reflective element being fixed to the platform, and the support member passing through the hollow region of the reflective element.

[0020] In one embodiment, the detection information includes one or more combinations of the position, shape, or size information of the region to be measured.

[0021] The present invention further provides a detection device, including the detection device described in any one of the above, and further including a detection component for detecting the object to be measured.

[0022] In one embodiment, the detection component is at least one of a chromatic confocal detection part, an interference detection component, a color camera, or a reflection spectrum detection part.

[0023] The beneficial effects of the technical solution of the present invention include: the detection beam emitted by the light source device is incident on the region to be measured and its peripheral region, and part of the detection light is reflected by the surface of the object to be measured to form part of the signal light (the second signal light), while part of the detection light passes through the peripheral region to form a re-inspection beam that passes through the peripheral region and irradiates the reflecting surface. During this process, due to the scattering and diffraction of the detection beam by the region to be measured, the propagation direction of the detection light is changed and it is not easily received by the detection device; since the reflecting surface is perpendicular to the central axis of the detection beam, the re-inspection beam is reflected by the reflecting surface and returns to the peripheral region, and the re-inspection light returning to the peripheral region passes through the peripheral region to form the first signal light. The detection device can receive the signal light twice, thereby increasing the image contrast between the peripheral region and the region to be measured, and further improving the detection accuracy. At the same time, since the detection light is used to receive the signal light, the signal light includes the first signal light emitted from the peripheral region in a direction perpendicular to the reflecting surface, and the central axis of the detection beam is perpendicular to the reflective element, so the parallelism of the detection beam forming the signal light is good, and the beam after the region to be measured changes the propagation direction of the detection beam is not easily received by the detection device, thereby further increasing the contrast of the formed image and improving the accuracy of detection. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 The structural transmission diagram of an embodiment of the detection device provided by this application;

[0026] Figure 2 The structural schematic diagram of another embodiment of the detection device provided by this application;

[0027] Figure 3 The structural schematic diagram of another embodiment of the detection device provided by this application. Detailed implementation manners

[0028] The core of the present invention is to provide a detection device, which can significantly improve the clarity and contrast of the edge of the object to be measured and improve the detection accuracy of the object to be measured.

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 The light transmission diagram of an implementation manner of the detection device provided by the present invention, Figure 2 The structural schematic diagram of an implementation manner of the detection device provided by the present invention.

[0033] In this embodiment, the detection device includes: a detection device 110, a light source device 120 and a reflecting element 130, the light source device 120 is used to emit a detection light beam to the area to be tested and its peripheral area, the detection light beam is incident on the area to be tested and its peripheral area along a direction perpendicular to the object to be tested, the detection light beam passes through the peripheral area to form a re-inspection light beam, and the area to be tested is used to change the propagation direction of the detection light beam; the reflecting element 130 has a reflecting surface, the central axis of the detection light beam is perpendicular to the reflecting element, the reflecting surface is used to reflect at least part of the re-inspection light beam to the peripheral area, the re-inspection light beam passes through the peripheral area to form a first signal light; the detection device 110 is used to receive signal light, the signal light includes the first signal light emitted from the peripheral area along a direction perpendicular to the reflecting surface of the reflecting element 130, to form detection information.

[0034] The beneficial effects of the technical solution of the present invention include: the detection light beam emitted by the light source device is incident on the area to be tested and its peripheral area, part of the detection light is reflected by the surface of the object to be tested to form part of the signal light (second signal light), and part of the detection light passes through the peripheral area to form a re-inspection light beam that passes through the peripheral area to irradiate the reflecting surface. In this process, due to the scattering and diffraction of the detection light beam by the area to be tested, the detection light changes its propagation direction and is not easily received by the detection device; since the reflecting surface is perpendicular to the central axis of the detection light beam, the re-inspection light beam is reflected by the reflecting surface and returns to the peripheral area, and the re-inspection light returned to the peripheral area passes through the peripheral area to form the first signal light. The detection device can receive the signal light twice, thereby increasing the image contrast between the peripheral area and the area to be tested, thereby improving the detection accuracy. At the same time, since the detection light is used to receive signal light, the signal light includes a first signal light emitted from the peripheral area in a direction perpendicular to the reflecting surface, and the central axis of the detection light beam is perpendicular to the reflecting element, the detection light beam that forms the signal light has good parallelism, and the light beam after the test area changes the propagation direction of the detection light beam is not easily received by the detection device, thereby further improving the contrast of the formed image and improving the accuracy of detection.

[0035] In this embodiment, there is at least one point on the surface of the object to be measured where the angle between the external normal and the reflection surface is less than 20°.

[0036] Specifically, in this embodiment, Figure 2 As shown, the object to be tested 150 is 2.5D or 3D glass, such as a mobile phone screen or a mobile phone case.

[0037] In this embodiment, the peripheral area of ​​the detection zone includes the area of ​​the object to be detected 150, and the peripheral area is a light-transmitting material relative to the detection beam, or it can be a light-impermeable material. In addition, the object to be detected 150 includes a central area, and the area to be detected is located outside the central area.

[0038] The area to be measured includes the edge line of the object to be measured or the edge line of the hole; the peripheral area includes the area of the object to be measured on one side of the edge line, and / or the spatial area on the other side of the edge line.

[0039] In this embodiment, the area to be measured is the edge line of the object to be measured; the peripheral area includes the area of the object to be measured on one side of the edge line and the spatial area on the other side of the edge line.

[0040] The spatial area refers to the part that does not belong to the object to be measured, such as the air near the edge line of the object to be measured in this embodiment.

[0041] The detection device further includes a bearing surface for placing the object to be measured.

[0042] In this embodiment, the light source device 120 includes a light source 121 and a beam splitter 122. Among them, the beam splitter 122 is arranged on the optical path between the light source 121 and the object to be measured 150, and is used to separate the detection beam and the signal light emitted by the light source 121. Through the above settings, the detection device has the advantage of small volume.

[0043] Specifically, the light source 121 is an LED light source array, which can be white light, blue light or light of other wavelengths, and can emit parallel detection beams; the beam splitter 122 is a semi-transparent and semi-reflective mirror, which can transmit part of the light and reflect part of the light.

[0044] In this embodiment, the light source 121 is used to emit a detection beam to the beam splitter 122, and the detection beam is incident on the area to be measured and its peripheral area in a direction perpendicular to the object to be measured 150 after being reflected or transmitted by the beam splitter.

[0045] In this embodiment, as Figure 1 shown, the beam splitter 122 can be used to reflect the detection beam emitted by the light source 121 and transmit the signal light. In another embodiment, as Figure 3 shown, the beam splitter 122 can be used to transmit the detection beam emitted by the light source 121 and reflect the signal light.

[0046] In another embodiment, the light source device 120 includes a telecentric parallel light source, and the parallelism of the detection beam emitted by this light source device is higher.

[0047] In this embodiment, the detection light beam emitted by the light source device 120 perpendicular to the reflection surface of the reflection element 130 has a central light beam at the center, and the central light beam and the optical axis of the detection device 110 pass through the same straight line. The fact that the central light beam and the optical axis of the detection device 110 pass through the same straight line can increase the intensity of the signal light parallel to the optical axis of the detection device detected by the detection device 110 to the maximum and reduce the intensity of the light beam with a divergence angle, so as to further increase the image contrast obtained.

[0048] For example: In this embodiment, the light source device 120 forms a solid light spot on the plane where the bearing surface is located, and the center of the field of view area of the detection device 110 on the plane where the bearing surface is located coincides with the solid light spot.

[0049] In other embodiments, the cross-section of the detection light beam on the bearing surface and the center of the field of view area of the detection device on the bearing surface deviate from each other.

[0050] In this embodiment, the light source device 120 and the reflection element 130 are respectively located on both sides of the bearing surface, and the light source device 120 and the detection device 110 are located on the same side of the bearing surface; and the optical axis of the detection device 110 is perpendicular to the reflection surface of the reflection element 130.

[0051] In this embodiment, the detection device 110 directly detects the signal light transmitted through the beam splitter 122; the detection light emitted by the light source is directly incident on the beam splitter 122. The structure of this detection device is compact and has a small volume.

[0052] In another implementation manner, please refer to Figure 3 again. The light emitting surface of the light source 121 is parallel to the reflection surface of the reflection element 130. The detection device 110 directly detects the signal light reflected by the beam splitter 122; the detection light emitted by the light source is directly incident on the beam splitter 122.

[0053] Figure 1 and Figure 3 The two detection devices shown both have the advantages of a compact structure and a small volume.

[0054] In other embodiments, the light reflected or projected by the spectroscope can be received by the detection device after being reflected by one or more mirrors. And / or, the detection light emitted by the light source reaches the spectroscope after being reflected by one or more mirrors. In this embodiment, the detection device 110 includes a detector 111 and a lens 112. An industrial camera is used, which is convenient to obtain materials and has a low cost. The optical axis of the detection device 110 is perpendicular to the reflection surface of the reflection element 130, and the light source device 120 is located between the detection device 110 and the reflection element 130; specifically, the light source device 120 has an end face close to the bearing surface, and the distance between this end face and the bearing surface is 150 - 170 mm, preferably 160 mm; in addition, the distance between the bearing surface and the reflection surface of the reflection element is 18 mm - 22 mm, preferably 20 mm. Through the above settings, after the detection beam emitted by the light source device 120 is reflected by the object to be measured and / or the reflection surface, more light can be collected by the detection device, so that the contour map signal output by the detection device is stronger, thereby reducing the signal-to-noise ratio of the detection device.

[0055] In this embodiment, the reflection surface of the reflection element 130 is specular reflection, which can keep the detection beam irradiated thereon, especially the re-inspection beam, parallel after being reflected by the reflection surface, so that the re-inspection beam irradiates the edge of the object to be measured 150 in parallel.

[0056] The reflection element 130 is annular, that is, the middle area of the reflection element 130 is hollow. Please refer to again Figure 1 , this detection device further includes a platform 140 and a support 141 located on the platform 140. The support 141 is used to support the central area of the object to be measured 150. The reflection element 130 is fixed on the platform 140, and the support 141 passes through the hollow area of the reflection element 130.

[0057] The surface of the support 141 for contacting the object to be measured 150 is the bearing surface; the bearing surface is parallel to the reflection surface.

[0058] When the object to be measured 150 is placed on the bearing surface, the main plane of the object to be measured 150 is parallel to the bearing surface. For example, the main plane of the mobile phone case contacts the bearing surface.

[0059] In this embodiment, the support 141 includes a plurality of suction cups. The plurality of suction cups are used to directly contact the object to be measured 150 and play a role in supporting the object to be measured 150. The detection device 110 is used to obtain images of the area to be measured and the peripheral area according to the signal light; obtain detection information of the area to be measured according to the images.

[0060] The detection information includes one or a combination of more of the position, shape or size information of the area to be measured.

[0061] Specifically, in this embodiment, the detection information includes the edge profile of 2.5D or 3D glass. In other embodiments, the detection information includes the position of the edge line of the hole.

[0062] Please refer to again Figure 1 , the parallel detection light beams emitted by the light source 121 are reflected by the beam splitter 122 after passing through the beam splitter 122. The detection light beams are incident on the area to be measured and its peripheral area in a direction perpendicular to the bearing surface. Part of the detection light beams are reflected by the surface of the object to be measured 150 to form part of the signal light (second signal light). The detection light beams reaching the area to be measured are scattered or diffracted by the area to be measured, changing the propagation direction and being difficult to be detected by the detection device, so that the gray value of the image of the area to be measured is small; the second signal light enters the detection device 110 after passing through the beam splitter 122, so that the gray value of the image formed by the object to be measured in the peripheral area is high; part of the detection light beams pass through the object to be measured and the space in the peripheral area to form a re-inspection light beam. The re-inspection light beam is reflected by the reflecting surface of the reflecting element 130 and then irradiates the peripheral area again. The re-inspection light beam passing through the peripheral area forms the first signal light. The first signal light passes through the beam splitter 122 and is received by the detection device 110. Part of the first signal light passing through the object to be measured in the peripheral area further increases the gray value of the image of the area to be measured in the peripheral area, improving the contrast. Since the spatial area of the peripheral area changes the propagation direction of light very little, the re-inspection light incident perpendicular to the reflecting surface is received by the detection device after being perpendicular to the re-inspection light and exiting, so that the gray value of the image of the spatial area of the peripheral area is high. In summary, through the above settings, the contrast of the acquired image can be improved, and the detection device can form a clear contour map of the object to be measured. In this embodiment, the parallel detection light beams provided by the light source are reflected by the surface of the object to be measured, and transmitted by the object to be measured after being reflected by the reflecting surface, and are jointly collected by the detection device to form a contour map of the object to be measured, improving the clarity of the edge imaging of the object to be measured.

[0063] In this embodiment, the detection device further includes a moving stage 140 for moving and / or rotating the object to be measured 150 relative to the detection device 110 and the light source device 120; specifically, the object to be measured 150 is arranged on the moving stage 140, and by moving the moving stage 140, the object to be measured 150 can be located within the irradiation range of the light source device 120. In other embodiments, the object to be measured 150 and the reflecting element 130 can also be arranged on the moving stage 140, so that the moving stage 140 drives the object to be measured 150 and the reflecting element 130 to move simultaneously.

[0064] This application also provides a detection device, which includes the above-mentioned detection device, and further includes: a detection component for optically detecting the object to be measured 150. The detection component can be at least one of a chromatic confocal detection part, an interference detection component, a color camera or a reflection spectrum detection part.

[0065] Although the present invention has been described with reference to specific examples, which are merely illustrative and not restrictive of the present invention, it will be apparent to those of ordinary skill in the art that changes, additions, or deletions can be made to the disclosed embodiments without departing from the spirit and scope of the present invention.

Claims

1. A detection device, characterized in that, it includes: a light source device for emitting a detection beam to the area to be measured and its peripheral area, the detection beam is incident on the area to be measured and its peripheral area in a direction perpendicular to the object to be measured, the detection beam passes through the peripheral area to form a re-inspection beam, and the area to be measured is used to change the propagation direction of the detection beam; part of the detection beam is reflected by the surface of the object to be measured to form a second signal light; the area to be measured includes the edge line of the edge of the object to be measured or the edge line of the hole; the peripheral area includes the area of the object to be measured on one side of the edge line, or / and the space area on the other side of the edge line; a reflection element having a reflection surface, the central axis of the detection beam is perpendicular to the reflection element, and the reflection surface is used to reflect at least part of the re-inspection beam to the peripheral area, and the re-inspection beam passes through the peripheral area to form a first signal light; and a detection device for receiving the signal light, the signal light includes the first signal light and the second signal light that exit from the peripheral area in a direction perpendicular to the reflection surface, and forms detection information; a platform and a support member located on the platform, the support member is used to support the central area of the object to be measured, the reflection element is fixed to the platform, and the support member passes through the hollow area of the reflection element.

2. The detection device according to claim 1, characterized in that, the light source device includes a light source and a beam splitter, and the beam splitter is arranged on the optical path between the light source and the object to be measured to separate the detection beam and the signal light emitted by the light source.

3. The detection device according to claim 2, characterized in that, the light source is an LED light source array, and the beam splitter is a semi-transparent and semi-reflective mirror.

4. The detection device according to claim 2, characterized in that, the beam splitter is used to reflect the detection beam emitted by the light source and transmit the signal light; or, the beam splitter is used to transmit the detection beam emitted by the light source and reflect the signal light.

5. The detection device according to claim 1, characterized in that, it further includes a bearing surface for placing the object to be measured; the light source device and the reflection element are respectively located on both sides of the bearing surface, and the light source device and the detection device are located on the same side of the bearing surface; the optical axis of the detection device is perpendicular to the reflection surface, or the light-emitting surface of the light source is parallel to the reflection surface.

6. The detection device according to claim 5, characterized in that, the optical axis of the detection device is perpendicular to the reflection surface, the light source device is located between the detection device and the reflection element, the light source device has an end face close to the bearing surface, and the distance between the end face and the bearing surface is 150-170 mm, and the distance between the bearing surface and the reflection surface is 18-22 mm.

7. The detection device according to claim 1, characterized in that, the detection beam perpendicular to the reflection surface has a central beam at the center; the central beam and the optical axis of the detection device pass through the same straight line.

8. The detection device according to claim 6, characterized in that, the included angle between the outer normal at at least one point on the surface of the object to be measured and the reflection surface is less than 20°.

9. The detection device according to claim 1, characterized in that, the peripheral area includes the area of the object to be measured, and the peripheral area is a light-transmitting material or a light-impermeable material with respect to the detection beam.

10. The detection device according to claim 1, characterized in that, the reflection element is a specular mirror.

11. The detection device according to claim 1, characterized in that, the light source device includes a telecentric collimated light source.

12. The detection device according to claim 1, characterized in that, the detection information includes one or more combinations of the position, shape or size information of the area to be measured.

13. A detection device, characterized in that, it includes the detection device according to any one of claims 1 to 12, and further includes a detection component for detecting the object to be measured.

14. The detection device according to claim 13, characterized in that, the detection component is at least one of a chromatic confocal detection part, an interference detection component, a color camera or a reflection spectrum detection part.

Images