Optical waveguide sheet detection mechanism and optical waveguide sheet detection and sorting equipment

Abstract

The present invention relates to the technical field of optical waveguide sheet detection equipment, and discloses an optical waveguide sheet detection mechanism and an optical waveguide sheet detection and sorting equipment. The optical waveguide sheet detection mechanism includes a frame body, a rotary placement module and a first shooting and detection module. The rotary placement module includes a rotary placement table, which is connected to the frame body. The rotary placement table is provided with a placement through hole, and an optical waveguide sheet is placed in the placement through hole. The first shooting and detection module includes a first detection camera and a first longitudinal linear module. The first longitudinal linear module extends along a set direction, and the depth of field distance of the first detection camera is less than the thickness of the optical waveguide sheet. For the light transmittance of the optical waveguide sheet, in the case of only using a single first detection camera to shoot from one side of the optical waveguide sheet, by moving the first detection camera to control the change of the focus point, the images of the upper surface and the lower surface of the optical waveguide sheet can be effectively obtained without repeatedly transporting or turning over the optical waveguide sheet, thus avoiding damage to the optical waveguide sheet.

Description

Technical Field

[0001] The present invention relates to the technical field of optical waveguide plate detection equipment, and in particular to an optical waveguide plate detection mechanism and an optical waveguide plate detection and sorting equipment. Background Art

[0002] As an important optical device, optical waveguide plays an important role in optical communication, optical biosensing, optical transistors, etc. Optical waveguides are light-transmitting and thin. During the front and back detection process, the background at the bottom interferes with the light to a certain extent, affecting the detection effect. There is a problem that optical waveguide detection mechanisms or equipment are prone to false detection, resulting in low detection efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an optical waveguide sheet detection mechanism and an optical waveguide sheet detection and sorting device, which can effectively improve the detection efficiency by reasonably configuring the depth of field distance of the first detection camera to reduce the interference of the bottom background on the light, and cooperate with the first longitudinal linear module to capture the images of the first surface and the second surface of the optical waveguide sheet.

[0004] On the one hand, an embodiment of the present invention provides an optical waveguide plate detection mechanism, comprising:

[0005] Frame;

[0006] A rotating placement module connected to the frame, the rotating placement module is provided with a placement through hole, an inner wall of the placement through hole is provided with a support portion extending toward the middle of the placement through hole, and the support portion is used to support the optical waveguide sheet;

[0007] A first shooting and detecting module is connected to the frame, the first shooting and detecting module includes a first detection camera and a first longitudinal linear module, the first detection camera is arranged above the placement through hole, the depth of field distance of the first detection camera is less than the thickness of the optical waveguide sheet, the first detection camera is used to capture the image of the first surface of the optical waveguide sheet, and move a preset distance toward the direction close to the optical waveguide sheet under the drive of the first longitudinal linear module to capture a partial or full image of the second surface of the optical waveguide sheet through the optical waveguide sheet.

[0008] The embodiments of the present invention have at least the following beneficial effects: the depth of field distance of the first detection camera is smaller than the thickness of the optical waveguide sheet, and the first and second surfaces of the optical waveguide sheet will not fall into the depth of field range of the first detection camera at the same time when capturing an image, that is, the first detection camera can only obtain a clear image of the corresponding surface when capturing the first or second surface of the optical waveguide sheet, and in view of the light transmittance of the optical waveguide sheet, when only a single first detection camera is used to capture images from one side of the optical waveguide sheet, a clear image of the second surface of the optical waveguide sheet can be effectively obtained by moving the first detection camera to control the change of the focus point, and the entire detection process does not require repeated transportation or turning over of the optical waveguide sheet, effectively avoiding damage to the optical waveguide sheet during transportation or turning over.

[0009] According to some embodiments of the present invention, the first shooting and detection module also includes a first transverse linear module, and the first detection camera is used to move along the length direction of the placement through hole under the drive of the first transverse linear module to adjust the shooting area of ​​the first detection camera.

[0010] According to some embodiments of the present invention, the rotating placement module includes a base and a rotating placement table, the base is connected to the frame, the rotating placement table is rotatably mounted on the base, the placement through hole is arranged on the rotating placement table, and the number of the placement through holes is multiple, and the position of the first detection camera is adapted to one of the multiple placement through holes.

[0011] According to some embodiments of the present invention, the optical waveguide sheet detection mechanism further includes a second shooting and detection module, the second shooting and detection module includes a second detection camera, the position of the second detection camera is adapted to one of the plurality of placement through holes, and is located below the placement through hole.

[0012] According to some embodiments of the present invention, the second shooting and detection module also includes a second horizontal linear module, which is connected to the second detection camera and is used to drive the second detection camera to move along the length direction of the placement through hole to adjust the shooting area of ​​the second detection camera.

[0013] According to some embodiments of the present invention, the first shooting and detecting module further includes a first backlight source, and the first backlight source and the first detection camera are respectively located on two opposite sides of the placement through hole.

[0014] According to some embodiments of the present invention, there are multiple support parts, which are distributed on the inner walls of the two long sides of the placement through hole, and a support position is provided at one end of the support part away from the inside of the placement through hole, and the width of the support position and the distance between the edge of the optical waveguide sheet are within a set range.

[0015] According to some embodiments of the present invention, a vacuum channel is provided in the support position, and the vacuum channel is connected to an external vacuum source.

[0016] According to some embodiments of the present invention, the rotation placement module further includes a vacuum flow meter, which is disposed on a pipeline connecting the vacuum channel and the external vacuum source, and is used to detect a flow rate in the pipeline.

[0017] On the other hand, an embodiment of the present invention provides an optical waveguide plate detection and sorting device, comprising the optical waveguide plate detection mechanism as described above.

[0018] According to another aspect of the present invention, the optical waveguide sheet inspection and sorting equipment has at least the following beneficial effects: the depth of field distance of the first inspection camera is smaller than the thickness of the optical waveguide sheet, and the first and second surfaces of the optical waveguide sheet will not fall into the depth of field range of the first inspection camera at the same time when shooting the image, that is, the first inspection camera can only obtain a clear image of the corresponding surface when shooting the first or second surface of the optical waveguide sheet, and in view of the light transmittance of the optical waveguide sheet, when only a single first inspection camera is used to shoot from one side of the optical waveguide sheet, a clear image of the second surface of the optical waveguide sheet can be effectively obtained by moving the first inspection camera to control the change of the focus, and the entire inspection process does not require repeated transportation or turning over of the optical waveguide sheet, which effectively avoids damage to the optical waveguide sheet during transportation or turning over.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 A schematic diagram of the structure of an optical waveguide plate detection mechanism according to an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a rotating placement table according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 A magnified view of the part A in the middle;

[0024] Figure 4 for Figure 3 Enlarged view of part B in the middle.

[0025] Reference numerals:

[0026] 100, frame;

[0027] 210, rotating placement module; 211, rotating placement table; 2111, placement through hole; 2112, support part; 21121, vacuum channel; 21122, vacuum air hole; 2113, material loading and unloading station; 2114, overhead inspection station; 2115, downward inspection station; 2116, rotating base; 2117, vacuum support carrier; 212, platform; 220, first shooting and detection module; 221, first detection camera; 222, first backlight source; 223, first horizontal linear module; 224, first vertical linear module; 230, second shooting and detection module; 231, second detection camera; 234, second horizontal linear module. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which 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 invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to 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 invention.

[0030] In the description of the present invention, "several" means one or more, "multiple" means more than two, greater than, less than, and exceeding are understood as not including the number itself, and "above", "below", and "within" are understood as including the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, words such as “setting”, “installation” and “connection” should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0032] Please refer to Figures 1 to 4As shown, this embodiment discloses an optical waveguide sheet detection mechanism, including a frame 100, a rotating placement module 210 and a first shooting detection module 220, the rotating placement module 210 is connected to the frame 100, the rotating placement module 210 is provided with a placement through hole 2111, the inner wall of the placement through hole 2111 is extended with a support portion 2112 toward the middle of the placement through hole 2111, and the support portion 2112 is used to support the optical waveguide sheet; the first shooting detection module 220 is connected to the frame 100, the first shooting detection module 220 includes a first detection camera 221 and a first longitudinal linear module 224, the first detection camera 221 is arranged above the placement through hole 2111, the depth of field distance of the first detection camera 221 is less than the thickness of the optical waveguide sheet, the first detection camera 221 is used to capture an image of the first surface of the optical waveguide sheet, and move a preset distance toward the direction close to the optical waveguide sheet under the drive of the first longitudinal linear module 224, so as to capture a partial or full image of the second surface of the optical waveguide sheet through the optical waveguide sheet.

[0033] It should be noted that the optical waveguide is light-transmissive, generally thin and has a large number of inspection dimensions. Conventional single-sided inspection solutions require multiple suction and movement of the optical waveguide to complete double-sided inspection, increasing the risk of damage to the optical waveguide.

[0034] It can be understood that the images acquired by the first detection camera 221 at a certain distance on both sides of the focus point are clear, and this distance is the depth of field distance of the first detection camera 221. Due to the light transmittance of the optical waveguide sheet, when the depth of field distance is greater than the thickness of the optical waveguide sheet, the first surface and the second surface of the optical waveguide sheet may exist simultaneously within the depth of field range of the first detection camera 221. The first detection camera 221 captures an image in which the first surface and the second surface of the optical waveguide sheet overlap, affecting the detection effect of the defect position of the optical waveguide sheet.

[0035] According to the optical waveguide sheet detection mechanism of the embodiment of the present invention, taking the case where the first detection camera 221 is located above the placement through hole 2111, the first surface is the upper surface of the optical waveguide sheet, and the second surface is the lower surface of the optical waveguide sheet as an example, the optical waveguide sheet is placed on the support portion 2112 of the rotating placement module 210 for support, and the optical waveguide sheet detection mechanism controls the first longitudinal linear module 224 to drive the first detection camera 221 to approach or move away from the optical waveguide sheet until the upper surface of the optical waveguide sheet enters the depth of field range of the first detection camera 221 (i.e., the focus point is adjusted), and the first detection camera 221 captures the upper surface. After the upper surface image is captured, the first detection camera 221 moves down a preset distance (such as a distance equal to the thickness of the optical waveguide sheet) until the lower surface of the optical waveguide sheet enters the depth of field of the first detection camera 221 (i.e., the focus point is adjusted), and the image of the lower surface is captured (wherein, the image of the lower surface may be a partial image, specifically, the partial image may be an image of a partial range of the optical waveguide sheet blocked by the support portion 2112; of course, the image of the lower surface may also be the entire image of the lower surface) to achieve double-sided detection of the optical waveguide sheet.

[0036] Furthermore, the first detection camera 221 may use a lens with a medium magnification (magnification between 2 and 10 times, such as 4, 5 or 6 times). The greater the magnification, the clearer the details of the captured image. Generally speaking, the greater the magnification of the lens, the smaller the depth of field. In practical applications, a lens with a depth of field less than 1 / n of the thickness of the optical waveguide sheet may be selected, for example, the depth of field is less than 1 / 5 of the thickness of the optical waveguide sheet; or, the depth of field is less than 1 / 4 of the thickness of the optical waveguide sheet; or, the depth of field is less than 1 / 2 of the thickness of the optical waveguide sheet.

[0037] According to the optical waveguide sheet detection mechanism of the embodiment of the present invention, the depth of field distance of the first detection camera 221 is smaller than the thickness of the optical waveguide sheet, and the first and second surfaces of the optical waveguide sheet will not fall into the depth of field range of the first detection camera 221 at the same time when capturing images, that is, the first detection camera 221 can only obtain a clear image of the corresponding surface when capturing the first or second surface of the optical waveguide sheet, and in view of the light transmittance of the optical waveguide sheet, when only a single first detection camera 221 is used to capture images from one side of the optical waveguide sheet, clear images of the first and second surfaces of the optical waveguide sheet can be effectively obtained by moving the first detection camera 221 to control the change of the focus, and the entire detection process does not require repeated transportation or turning over of the optical waveguide sheet, effectively avoiding damage to the optical waveguide sheet during transportation or turning over.

[0038] In the present embodiment, "placing the optical waveguide sheet on the rotating placement table 211" can be done by manual placement or automatic placement. Automatic placement can use a transport module, and the transport module can be provided with a suction nozzle module to absorb and transport the optical waveguide sheet to reduce the force on the surface of the optical waveguide sheet.

[0039] In this embodiment, the first longitudinal linear module 224 can be a slide module, a movable screw module, a cylinder, etc., which is not limited here.

[0040] In this embodiment, the preset distance that the first detection camera 221 moves downward is equal to the thickness of the optical waveguide sheet. The optical waveguide sheet detection mechanism does not need to adjust the moving distance of the first detection camera 221 for each optical waveguide sheet to be detected, but only needs to adjust the preset distance for different types of optical waveguide sheets (corresponding to different thicknesses), which effectively improves the debugging efficiency of the optical waveguide sheet detection mechanism. Of course, in other embodiments, the preset distance can also be set by the staff according to the use requirements. It should be noted that the first detection camera 221 can capture clear images within the depth of field range, so the depth of field distance of the first detection camera 221 can adapt to optical waveguide sheets of different thicknesses to a certain extent.

[0041] Combination Figure 1 As shown, the first shooting and detecting module 220 also includes a first transverse linear module 223 , and the first detecting camera 221 is used to move along the length direction of the placement through hole 2111 under the drive of the first transverse linear module 223 to adjust the shooting area of ​​the first detecting camera 221 .

[0042] In this embodiment, the first detection camera 221 is connected to the first longitudinal linear module 224 via the first transverse linear module 223, the free end of the first transverse linear module 223 is connected to the first detection camera 221, the fixed end of the first transverse linear module 223 is connected to the free end of the first longitudinal linear module 224, and the moving direction of the free end of the first transverse linear module 223 is the same as the length direction of the optical waveguide sheet corresponding to the first shooting detection module 220. In other embodiments, it can also be configured that the first longitudinal linear module 224 is connected to the frame 100 via the first transverse linear module 223, in which case the first transverse linear module 223 drives the first detection camera and the first longitudinal linear module 224 to move as a whole.

[0043] It can be understood that the greater the magnification of the camera, the clearer the details of the captured image are displayed, but the field of view is smaller. In this embodiment, the first detection camera 221 can be moved relative to the optical waveguide sheet driven by the first horizontal linear module 223. The first detection camera 221 can shoot the optical waveguide sheet multiple times along the moving direction of the first horizontal linear module 223 to obtain partial images of multiple optical waveguide sheets. By combining multiple partial images into an image of a complete optical waveguide sheet, higher clarity can be obtained, thereby effectively improving the detection accuracy of the optical waveguide sheet.

[0044] Furthermore, when the multiple local images acquired by the first detection camera 221 have overlapping areas, the multiple local images can be synthesized into an overall image of the optical waveguide plate, so as to facilitate subsequent manual re-inspection of the optical waveguide plate by combining the synthesized overall image; of course, the multiple local images acquired by the first detection camera 221 can also be discontinuous, such as taking pictures and spot checks on key defect areas of the optical waveguide plate.

[0045] Furthermore, the number of local images obtained by the first detection camera 221 on the first and second surfaces of the optical waveguide plate may be inconsistent. For example, the first detection camera 221 may obtain continuous local images on the first surface of the optical waveguide plate, while only obtaining images of the local range blocked by the support portion 2112 on the second surface of the optical waveguide plate.

[0046] In this embodiment, the first transverse linear module 223 can be a slide module, a movable screw module, a cylinder, etc., which is not limited here.

[0047] In this embodiment, the first detection camera 221, driven by the first horizontal linear module 223, takes 5 partial images of the optical waveguide sheet to synthesize an overall image; of course, based on the size of the detection field of view of the first detection camera 221 and the size of the optical waveguide sheet, the number of shots of the first detection camera 221 and the position of the acquired partial image can be adaptively adjusted.

[0048] In some embodiments, in combination Figures 1 to 4 As shown, the rotating placement module 210 includes a base 212 and a rotating placement table 211. The base 212 is connected to the frame 100. The rotating placement table 211 is rotatably mounted on the base 212. The placement through hole 2111 is arranged on the rotating placement table 211, and the number of the placement through holes 2111 is multiple. The position of the first detection camera 221 is adapted to one of the multiple placement through holes 2111.

[0049] In this embodiment, Figure 2 and Figure 3 As shown, four placement through holes 2111 are arranged on the rotating placement table 211. As the rotating placement table 211 rotates, the placement through holes 2111 can be rotated and switched between positions. By setting the first detection camera 221 above one of the placement through holes 2111, the remaining placement through holes 2111 can be used for other work processes. For example, the placement through hole 2111 before the placement through hole 2111 corresponding to the first detection camera 221 can be used as a material picking and placing station, so that the image shooting process of the first detection camera 221 and the material picking and placing process of other optical waveguide sheets are carried out synchronously, thereby effectively improving the detection efficiency of the optical waveguide sheet detection mechanism.

[0050] In this embodiment, the remaining two of the four placement through holes 2111 will be described in detail later. Of course, the number of placement through holes 2111 can be adjusted based on actual needs. For example, three placement through holes 2111 are set, and the three placement through holes 2111 are symmetrically spaced one hundred and twenty degrees around the rotation axis of the rotating placement table 211. A larger number of placement through holes 2111 can also be set, such as five placement through holes 2111. More placement through holes 2111 can adapt to more work processes. For example, in this embodiment, in addition to the placement through holes 2111 corresponding to the first inspection camera 221 and the placement through holes 2111 of the material loading and unloading station, other inspection equipment can be set on other placement through holes 2111, such as an appearance inspection camera for appearance re-inspection.

[0051] In some embodiments, in combination Figures 1 to 4 As shown, the optical waveguide sheet detection mechanism also includes a second shooting detection module 230, and the second shooting detection module 230 includes a second detection camera 231. The position of the second detection camera 231 is adapted to one of the multiple placement through holes 2111 and is located below the placement through hole 2111.

[0052] In this embodiment, for the convenience of description, different placement through holes 2111 on the rotating placement table 211 are distinguished as different workstations. Figure 2 and Figure 3 In this embodiment, four placement through holes 2111 are provided on the rotating placement table 211, three of which correspond to the material loading and unloading station, the overhead inspection station and the overhead inspection station. The optical waveguide sheet to be inspected is first placed in the material loading and unloading station 2113, and the rotating placement table 211 rotates to rotate the optical waveguide sheet to be inspected to the overhead inspection station 2115, and the image of the upper surface and part of the lower surface (the part blocked by the support part 2112) of the optical waveguide sheet is obtained by the first inspection camera 221. After the acquisition is completed, the rotating placement table 211 continues to rotate to rotate the optical waveguide sheet to the overhead inspection station 2114, and the image of all or part of the lower surface (the part not blocked by the support part 2112) of the optical waveguide sheet is obtained by the second inspection camera 231.

[0053] In this embodiment, through the cooperation of multiple placement through holes 2111 and the second detection camera 231, the material loading and unloading process, the overhead detection process and the overhead detection process of the optical waveguide sheet can be carried out simultaneously, which greatly shortens the debugging cycle and detection time of the optical waveguide sheet detection mechanism and effectively improves the production efficiency of the optical waveguide sheet.

[0054] In this embodiment, the detection field of the second detection camera 231 does not pass through the optical waveguide sheet when taking the lower surface image, which is clearer than the partial lower surface image obtained by the first detection camera 221, thereby improving the detection accuracy. By performing comprehensive detection on the image of the lower surface of the optical waveguide sheet taken by the second detection camera 231 and the partial image of the blocked portion of the lower surface of the optical waveguide sheet taken from top to bottom by the first detection camera 221, the lower surface of the optical waveguide sheet can be comprehensively detected, which is conducive to improving the detection accuracy.

[0055] In this embodiment, the upward shooting inspection station 2114 and the downward shooting inspection station 2115 are separately provided, that is, the placement holes 2111 corresponding to the first inspection camera 221 and the second inspection camera 231 are different; of course, in other embodiments, the first inspection camera 221 and the second inspection camera 231 can also be provided to correspond to the same placement hole 2111, and can be respectively provided on the upper and lower sides of the placement hole 2111.

[0056] In the present embodiment, the four placement through holes 2111 of the optical waveguide plate detection mechanism are spaced ninety degrees apart; of course, the specific number of placement through holes 2111 can be adjusted based on different needs. For example, if only one material loading and unloading station 2113, one overhead inspection station 2114 and one downward inspection station 2115 are set, the interval between the stations is controlled to be one hundred and twenty degrees. If there are other station requirements, the number of placement through holes 2111 is increased. For example, if five placement through holes 2111 are set, the interval between each placement through hole 2111 is seventy-two degrees.

[0057] In this embodiment, combined with Figures 2 to 4 As shown, there are four support parts 2112, each in a group of two, and the corresponding first detection camera 221 only needs to obtain two partial lower surface images corresponding to each group of support parts 2112; of course, the number of partial lower surface images obtained by the first detection camera 221 can be adaptively adjusted for different numbers of support parts 2112.

[0058] In some embodiments, in combination Figure 1 As shown, the second shooting and detection module 230 also includes a second horizontal linear module 234, which is connected to the second detection camera 231 and is used to drive the second detection camera 231 to move along the length direction of the placement through hole 2111 to adjust the shooting area of ​​the second detection camera 231.

[0059] It can be understood that the greater the magnification of the camera, the clearer the details of the captured image are displayed, but the field of view is smaller. In this embodiment, the second detection camera 231 can be moved relative to the optical waveguide sheet driven by the second horizontal linear module 234. The second detection camera 231 can shoot the optical waveguide sheet multiple times along the moving direction of the second horizontal linear module 234 to obtain local images of multiple optical waveguide sheets. By combining multiple local images into a complete optical waveguide sheet image, higher clarity can be obtained, effectively improving the detection accuracy of the optical waveguide sheet.

[0060] Furthermore, when the multiple local images acquired by the second detection camera 231 have overlapping areas, the multiple local images can be synthesized into an overall image of the optical waveguide sheet, so as to facilitate subsequent manual re-inspection of the optical waveguide sheet by combining the synthesized overall image; of course, the multiple local images acquired by the second detection camera 231 can also be discontinuous, and key defect areas of the optical waveguide sheet can be photographed and inspected.

[0061] In this embodiment, the second transverse linear module 234 can be a slide module, a movable screw module, a cylinder, etc., which is not limited here.

[0062] In this embodiment, the second detection camera 231, driven by the second horizontal linear module 234, takes 5 partial images of the lower surface of the optical waveguide sheet to synthesize an overall image; of course, the number of shots of the second detection camera 231 can be adaptively adjusted based on the size of the detection field of view of the second detection camera 231 and the size of the optical waveguide sheet.

[0063] In some embodiments, in combination Figure 1 As shown, the first shooting and detecting module 220 further includes a first backlight source 222 , and the first backlight source 222 and the first detecting camera 221 are respectively located at two opposite sides of the placement through hole 2111 .

[0064] In this embodiment, the first backlight source 222 uses a coaxial light source, and the first backlight source 222 is used to supplement light, which can improve the clarity of the first detection camera 221 while avoiding the interference of the bottom background in the image taken by the detection camera on the imaging result, so as to improve the repeatability accuracy of the optical waveguide sheet detection mechanism, reduce the frequency of re-inspection, and effectively improve the detection efficiency of the optical waveguide sheet. In addition, a clear image can be obtained by reasonably controlling the exposure parameters of the first detection camera 221.

[0065] Of course, the second detection camera 231 can also be provided with a second backlight source (not shown in the figure). Specifically, the second backlight source and the second detection camera 231 are respectively located on opposite sides of the placement through hole 2111. In addition, in combination with the multiple placement through holes 2111 provided on the rotating placement table 211 as mentioned above, when the first detection camera 221 and the second detection camera 231 correspond to different placement through holes 2111, it is effectively ensured that the spatial arrangements of the first detection camera 221, the second detection camera 231, the first backlight source 222 and the second backlight source will not interfere with each other.

[0066] In some embodiments, in combination Figures 1 to 4 As shown, there are multiple support parts 2112, and the multiple support parts 2112 are distributed on the inner walls of the two long sides of the placement through hole 2111. A support position is set at one end of the support part 2112 away from the inside of the placement through hole 2111, and the width of the support position and the distance between the edge of the optical waveguide plate are within a set range.

[0067] In the present embodiment, a plurality of support portions 2112 are symmetrically arranged in groups of two on both sides of the through hole 2111; the symmetrically arranged support portions 2112 ensure that the optical waveguide sheet can be stably supported; of course, in other embodiments, an odd number of support portions 2112 may also be arranged, such as three support portions 2112, two of which are located on the same inner wall, and the remaining one is located on the other inner wall, so as to form a triangular structure to stably support the optical waveguide sheet.

[0068] In this embodiment, the part of each support portion 2112 located below the optical waveguide sheet is a support position, which will contact the optical waveguide sheet and may cause damage to the optical waveguide sheet. It is understandable that the optical waveguide sheet usually uses a certain range of the central area as an effective use area. By controlling the width of the support position and the distance between the edge of the optical waveguide sheet within a set range, the support position is effectively prevented from contacting the effective use area of ​​the optical waveguide sheet, and the support position is prevented from blocking or damaging the detection of the effective use area. It should be noted that the detection requirements of other areas on the optical waveguide sheet except the effective use area are relatively low.

[0069] In this embodiment, the image captured by the first detection camera 221 can also be used to determine the relationship between the width of the support position and the edge of the optical waveguide and the set range (i.e., edge distance detection) to determine whether the optical waveguide is placed correctly.

[0070] In this embodiment, the optical waveguide sheet detection mechanism may be provided with an alarm module, and the first detection camera 221 may be electrically connected to the alarm module. When the image result of the first detection camera 221 determines that the optical waveguide sheet is not correctly placed, the alarm module is controlled to alarm the staff.

[0071] In this embodiment, the placement through hole 2111 is in a strip shape. Of course, based on the optical waveguide sheet of different shapes, the shape of the placement through hole 2111 and the arrangement of the support part 2112 can be adaptively changed. For example, if it is a circle, the placement through hole 2111 can be set to a circle, and a plurality of support parts 2112 can be symmetrically arranged around the center of the circle of the placement through hole 2111.

[0072] In this embodiment, the maximum value of the setting range is 0.36 mm, and the width of the support position is 0.28 mm; of course, the setting range and the width of the support position can be adaptively adjusted based on optical waveguide sheets of different specifications.

[0073] In some embodiments, in combination Figures 2 to 4 As shown, a vacuum channel 21121 is provided in the support position, and the vacuum channel 21121 is connected to an external vacuum source. By starting the external vacuum source, a negative pressure state is formed in the vacuum channel, so that the optical waveguide sheet is stably adsorbed on the support position.

[0074] In this embodiment, a plurality of vacuum air holes 21122 are provided at the bottom of the vacuum channel 21121, and the vacuum air holes 21122 connect the vacuum channel 21121 with an external vacuum source. The vacuum channel 21121 integrates and buffers the airflow in the plurality of vacuum air holes 21122, so as to avoid excessive local pressure on the surface where the optical waveguide sheet contacts the vacuum channel 21121 and thus causing damage.

[0075] In this embodiment, vacuum adsorption effectively reduces the contact between the surface of the optical waveguide and the support portion 2112, thereby reducing damage to the surface of the optical waveguide. The arrangement of the vacuum channel 21121 can be adjusted according to the size and shape of the optical waveguide to meet the fixing requirements of optical waveguides of different specifications.

[0076] In some embodiments, the rotation placement module 210 further includes a vacuum flow meter (not shown in the figure), which is disposed on a pipeline connecting the vacuum channel 21121 and an external vacuum source, and is used to detect the flow in the pipeline.

[0077] It is understandable that when the optical waveguide is adsorbed on the vacuum channel 21121 , the flow rates detected by the vacuum flowmeter corresponding to the optical waveguide in the fully adsorbed state and the partially adsorbed state are different, thereby determining whether the optical waveguide is stably placed on the support portion 2112 .

[0078] Furthermore, as mentioned in the above embodiments, the placement state of the optical waveguide sheet can also be determined in combination with the image detected by the first detection camera 221 .

[0079] In this embodiment, the optical waveguide sheet detection mechanism can be provided with an alarm module, and the vacuum flow meter and the first detection camera 221 can be electrically connected to the alarm module. When any one of the flow rate detected by the vacuum flow meter and the image of the first detection camera 221 determines that the optical waveguide sheet is not correctly placed, the alarm module is controlled to alarm and prompt the staff.

[0080] Combination Figures 2 to 4 As shown, the rotating placement table 211 includes a detachably connected rotating base 2116 and a vacuum support carrier 2117, the rotating base 2116 can rotate relative to the base 212, and the vacuum support carrier 2117 is provided with a placement through hole 2111. A groove is provided on the rotating base 2116 to match the vacuum support carrier 2117, and by replacing the vacuum support carrier 2117 with different placement through holes 2111 specifications to adapt to optical waveguides of different specifications, the adaptability of the optical waveguide detection mechanism is improved while reducing the debugging cost of the optical waveguide detection mechanism.

[0081] This embodiment further provides an optical waveguide plate detection and sorting device, including the optical waveguide plate detection mechanism of the above embodiment. Its beneficial effects refer to the optical waveguide plate detection mechanism of the above embodiment, which will not be described again here.

[0082] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An optical waveguide sheet detection mechanism for detecting an optical waveguide sheet, characterized in that: include: Frame (100); A rotating placement module (210) connected to the frame (100), the rotating placement module (210) being provided with a placement through hole (2111), the inner wall of the placement through hole (2111) being provided with a support portion (2112) extending toward the middle of the placement through hole (2111), the support portion (2112) being used to support the optical waveguide sheet; a first shooting and detecting module (220) connected to the frame (100), the first shooting and detecting module (220) comprising a first detecting camera (221) and a first longitudinal linear module (224), the first detecting camera (221) being arranged above the placement through hole (2111), the depth of field of the first detecting camera (221) being less than the thickness of the optical waveguide sheet, the first detecting camera (221) being used to shoot an image of a first surface of the optical waveguide sheet, and to move a preset distance in a direction close to the optical waveguide sheet under the drive of the first longitudinal linear module (224) so ​​as to shoot a partial or full image of a second surface of the optical waveguide sheet through the optical waveguide sheet; The number of the support parts (2112) is multiple, and the multiple support parts (2112) are distributed on the inner walls of the two long sides of the placement through hole (2111); a support position is provided at one end of the support part (2112) away from the inside of the placement through hole (2111); a vacuum channel (21121) is provided in the support position, and the vacuum channel (21121) is connected to an external vacuum source. By starting the external vacuum source, a negative pressure state is formed in the vacuum channel (21121), so that the optical waveguide sheet is stably adsorbed on the support position; a plurality of vacuum air holes (21122) are provided at the bottom of the vacuum channel (21121), and the vacuum air holes (21122) are connected to the vacuum channel (21121) and the external vacuum source; The optical waveguide sheet detection mechanism further comprises a second shooting detection module (230), wherein the second shooting detection module (230) comprises a second detection camera (231), and the second detection camera (231) is located below the placement through hole (2111); The second shooting detection module (230) further comprises a second transverse linear module (234), which is connected to the second detection camera (231) and is used to drive the second detection camera (231) to move along the length direction of the placement through hole (2111) to adjust the shooting area of ​​the second detection camera (231).

2. The optical waveguide plate detection mechanism according to claim 1, characterized in that: The first shooting detection module (220) further comprises a first transverse linear module (223), and the first detection camera (221) is used to move along the length direction of the placement through hole (2111) under the drive of the first transverse linear module (223) to adjust the shooting area of ​​the first detection camera (221).

3. The optical waveguide plate detection mechanism according to claim 1, characterized in that: The rotating placement module (210) comprises a pedestal (212) and a rotating placement table (211); the pedestal (212) is connected to the frame (100); the rotating placement table (211) is rotatably mounted on the pedestal (212); the placement through holes (2111) are arranged on the rotating placement table (211), and the number of the placement through holes (2111) is multiple; the position of the first detection camera (221) is adapted to one of the multiple placement through holes (2111).

4. The optical waveguide plate detection mechanism according to claim 3, characterized in that: The position of the second detection camera (231) is adapted to one of the plurality of placement through holes (2111).

5. The optical waveguide plate detection mechanism according to claim 4, characterized in that: The first shooting detection module (220) further comprises a first backlight source (222), wherein the first backlight source (222) and the first detection camera (221) are respectively located on two opposite sides of the placement through hole (2111).

6. The optical waveguide plate detection mechanism according to any one of claims 1 to 5, characterized in that: The width of the support position and the distance between the edge of the optical waveguide sheet are within a set range.

7. The optical waveguide plate detection mechanism according to claim 6, characterized in that: The rotation placement module (210) further comprises a vacuum flow meter, which is arranged on a pipeline connecting the vacuum channel (21121) and the external vacuum source, and is used to detect the flow in the pipeline.

8. An optical waveguide plate detection and sorting device, characterized in that: The optical waveguide plate detection mechanism comprises the optical waveguide plate detection mechanism as claimed in any one of claims 1 to 7.

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