Circuit board photographing device

Abstract

The embodiment of the utility model provides a circuit board photographing device, and the device comprises a pedestal which is used for bearing a to-be-detected circuit board; the photographing assembly is installed on the base, the photographing assembly comprises a camera, a dimmer and a polarization light source, the dimmer is arranged at a light inlet of the camera, the polarization light source is used for emitting polarization detection light to the circuit board to be detected, and the polarization detection light can be reflected on the circuit board to be detected and enters the camera through the dimmer; the polarization direction of the polarization detection light is different from the polarization direction of the dimmer. By arranging the polarized light source and the light reducing sheet, the light reducing sheet is arranged at the light inlet of the camera, and the polarization direction of the polarization detection light emitted by the polarized light source to the circuit board to be detected is different from the polarization direction of the light reducing sheet, so that part of light reflected by the circuit board to be detected can be filtered by the light reducing sheet, and the reflection interference is reduced; and the camera can obtain a clear picture of the circuit board to be detected, so that testing is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and in particular to a circuit board photographing device. Background Technology

[0002] After the circuit board design is completed, it needs to pass testing before it can be put into production. During the testing process, a camera is used to photograph the silkscreen and other structures on the circuit board to obtain magnified images, and then the circuit board is judged to determine whether it meets the requirements.

[0003] In existing technologies, supplementary lighting is usually used to illuminate the circuit board, and then a camera is used to take pictures of the circuit board. This process is prone to reflections, resulting in unclear photos and making it impossible to conduct tests properly. Utility Model Content

[0004] 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 a circuit board photographing device capable of obtaining clear photographs of the circuit board to be inspected.

[0005] This utility model provides a circuit board imaging device, which includes: a base for supporting a circuit board to be inspected; and an imaging component mounted on the base. The imaging component includes a camera, a neutral density filter (ND filter), and a polarizing light source. The ND filter is disposed at the light inlet of the camera. The polarizing light source emits polarized detection light onto the circuit board to be inspected. The polarized detection light can be reflected on the circuit board and passes through the ND filter to enter the camera. The polarization direction of the polarized detection light is different from that of the ND filter.

[0006] The circuit board imaging device provided by this utility model has at least the following beneficial effects:

[0007] By setting up a polarizing light source and a neutral density filter (ND filter), with the ND filter positioned at the camera's light inlet, the polarization direction of the polarized detection light emitted by the polarizing light source onto the circuit board under test differs from that of the ND filter. This allows the ND filter to filter out some of the light reflected from the circuit board, reducing glare interference. The camera can then capture a clear image of the circuit board under test for testing purposes.

[0008] In one embodiment of this implementation, the imaging component includes a mounting base connected to the base, and both the camera and the neutral density filter are disposed on the mounting base, with the neutral density filter located on the bottom side of the camera.

[0009] In one embodiment of this implementation, the mounting base has a light-transmitting hole, and the camera and the neutral density filter are located on opposite sides of the light-transmitting hole in the axial direction.

[0010] In one embodiment of this implementation, the imaging component includes a fixing base connected to the mounting base and having a fixing hole, and the light-reducing filter is disposed in the fixing hole.

[0011] In one embodiment of this implementation, the imaging component includes a fastener, the mounting base has a connecting hole that communicates with the mounting hole, the fastener passes through the connecting hole and abuts against the neutral density filter, so that the neutral density filter is fixed to the mounting hole.

[0012] In one embodiment of this implementation, the circuit board imaging device includes a motion mechanism mounted on the base and connected to the imaging component. The motion mechanism can drive the imaging component to move relative to the base.

[0013] In one embodiment of this implementation, the motion mechanism includes a first slide rail and a first drive member. The first slide rail is mounted on the base and slides in cooperation with the camera component. The first drive member is used to drive the camera component to slide along the first slide rail.

[0014] In one embodiment of this implementation, the motion mechanism includes a second slide rail and a second driving member. The second slide rail is mounted on the base and slides in cooperation with the first slide rail. The second driving member is used to drive the first slide rail to move the camera component along the second slide rail. The extension direction of the second slide rail intersects with the extension direction of the first slide rail.

[0015] In one embodiment of this implementation, the circuit board imaging device includes a carrier plate that is slidably connected to the base. The carrier plate is used to support the circuit board to be tested and can drive the circuit board to be tested to slide relative to the base.

[0016] In one embodiment of this implementation, the polarized light source includes a supplementary light and a polarizer. The polarizer is disposed at the light-emitting position of the supplementary light, and the supplementary light emits light toward the polarizer. The light passes through the polarizer to form the polarization detection light.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a circuit board photographing device according to one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A three-dimensional structural diagram of the circuit board imaging device from another perspective;

[0021] Figure 3 yes Figure 1 A 3D structural diagram of some of the camera components;

[0022] Figure 4 yes Figure 3 A three-dimensional structural diagram of the fixing base;

[0023] Figure 5 yes Figure 1 A three-dimensional structural diagram of the photographing components and some motion mechanisms of the circuit board photographing device.

[0024] Figure label:

[0025] Circuit board imaging device 100; base 10; imaging component 20; camera 21; neutral density filter 22; polarizing light source 23; mounting base 24; light-transmitting hole 241; fixing base 25; fixing hole 251; connecting hole 252; lamp holder 26; motion mechanism 30; first slide rail 31; first drive component 32; second slide rail 33; second drive component 34; material carrier plate 40; drawer plate 41; third drive component 42. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Please see Figure 1 , Figure 1 This is a three-dimensional structural diagram of a circuit board imaging device 100 according to one embodiment of the present invention. The present invention provides a circuit board imaging device 100, which includes a base 10 and an imaging component 20. The base 10 supports the circuit board to be inspected, and the imaging component 20 is mounted on the base 10. The imaging component 20 includes a camera, a neutral density filter (NDF), and a polarizing light source. It should be noted that the camera, NDF, and polarizing light source are not shown in the figure; for ease of understanding, they are designated as 21, 22, and 23 to indicate their respective mounting positions. The NDF 22 is located at the light inlet of the camera 21. The polarizing light source 23 emits polarized detection light onto the circuit board to be inspected. The polarized detection light can be reflected on the circuit board and passes through the NDF 22 to enter the camera 21. The polarization direction of the polarized detection light is different from that of the NDF 22.

[0032] Specifically, the polarization detection light is linearly polarized, and the neutral density filter 22 is a linear polarizer. The polarization direction of the polarization detection light can be perpendicular to the polarization direction of the neutral density filter 22. It can be understood that when the partially polarized detection light emitted from the polarization source 23 undergoes specular reflection on the circuit board under test, the polarization direction of this portion of the light remains unchanged (the same as when it was emitted). Due to the different polarization direction of the neutral density filter 22, this portion of the light is difficult to pass through the neutral density filter 22 and enter the camera 21, thus reducing the interference of reflection. Conversely, the partially polarized detection light emitted from the polarization source 23 undergoes diffuse reflection on the circuit board under test, forming diffusely reflected light with inconsistent polarization directions. Most of the diffusely reflected light can pass through the neutral density filter 22 and enter the camera 21 for normal imaging. The camera 21 can be electrically connected to a display (not shown) to send image information to the display for workers to observe.

[0033] By setting up a polarizing light source 23 and a neutral density filter 22, with the filter 22 positioned at the light inlet of the camera 21, the polarization direction of the polarized detection light emitted by the polarizing light source 23 onto the circuit board under test is different from that of the neutral density filter 22. This allows the filter 22 to filter out some of the light reflected from the circuit board under test, reducing reflection interference. The camera 21 can then obtain a clear photograph of the circuit board under test for testing purposes.

[0034] In one embodiment of this implementation, please refer to Figure 1 and Figure 2 , Figure 2 yes Figure 1 The diagram shows a three-dimensional view of the circuit board imaging device 100 from another perspective. The circuit board imaging device 100 includes a carrier plate 40, which is slidably connected to a base 10. The carrier plate 40 carries the circuit board to be inspected and can cause the circuit board to slide relative to the base 10. Specifically, the carrier plate 40 is located on the bottom side of the imaging assembly 20. By setting the carrier plate 40 to be slidably connected to the base 10, the circuit board to be inspected can slide relative to the base 10, facilitating the loading and unloading of the circuit board.

[0035] In this embodiment, the circuit board imaging device 100 includes a drawer plate 41 and a third driving member 42. The drawer plate 41 is connected to the carrier plate 40 and is used for the user to pull out or push in the carrier plate 40. The third driving member 42 is mounted on the base 10 and connected to the carrier plate 40 to drive the carrier plate 40 to slide relative to the base 10, so as to improve the testing efficiency.

[0036] In one embodiment of this implementation, please refer to Figure 1 The polarization light source 23 includes a supplementary light lamp (not shown) and a polarizer (not shown). The polarizer is positioned at the light-emitting end of the supplementary light lamp, and the lamp emits light towards the polarizer. The light passes through the polarizer to form polarized detection light. Specifically, the light emitted from the supplementary light lamp is natural light, which is converted into linearly polarized light by the polarizer. The polarization directions of the polarizer and the neutral density filter 22 are perpendicular to each other, so that the light that undergoes specular reflection on the circuit board under test can be adequately filtered. With this configuration, the supplementary light lamp and the polarizer work together to form polarized detection light. The structure of the polarization light source 23 is relatively simple and the cost is low.

[0037] In one embodiment of this implementation, please refer to Figure 1 and Figure 3 , Figure 3 yes Figure 1A three-dimensional structural diagram of part of the imaging component 20 is shown. The imaging component 20 includes a mounting base 24, which is connected to the base 10. Both the camera 21 and the neutral density filter 22 are mounted on the mounting base 24, with the neutral density filter 22 located on the bottom side of the camera 21. Specifically, the camera 21 is fixed to the mounting base 24 with screws. By setting the mounting base 24, both the camera 21 and the neutral density filter 22 are mounted on it, and the neutral density filter 22 is located on the bottom side of the camera 21, so that light can be filtered through the neutral density filter 22 to reduce reflection interference.

[0038] In one embodiment of this implementation, please refer to Figure 1 and Figure 3 The mounting base 24 has a light-transmitting hole 241, with the camera 21 and the neutral density filter 22 located on opposite sides of the light-transmitting hole 241 along the axial direction. Specifically, the camera 21 is located on the top side of the light-transmitting hole 241, and the neutral density filter 22 is located on the bottom side of the light-transmitting hole 241. This arrangement ensures that the light inlets of the neutral density filter 22 and the camera 21 are aligned.

[0039] In one embodiment of this implementation, please refer to Figure 1 and Figure 3 The imaging component 20 includes a mounting base 25, which is connected to a mounting base 24 and has a mounting hole 251. A neutral density filter 22 is disposed in the mounting hole 251. Specifically, the light-transmitting hole 241 and the mounting hole 251 are arranged opposite each other. The mounting base 25 is fixed to the mounting base 24 with screws. By setting the mounting base 25, the neutral density filter 22 is mounted to the mounting base 24 via the mounting base 25, and the neutral density filter 22 is disposed in the mounting hole 251 of the mounting base 25. This helps ensure the consistency of the installation of the camera 21 and the neutral density filter 22, and ensures that the neutral density filter 22 can effectively filter specular reflection light.

[0040] In one embodiment of this implementation, please refer to Figure 1 , Figure 3 and Figure 4 , Figure 4 yes Figure 3A three-dimensional structural diagram of the mounting base 25 is provided. The imaging component 20 includes a fastener (not shown). The mounting base 25 has a connecting hole 252, which communicates with the fixing hole 251. The fastener passes through the connecting hole 252 and abuts against the neutral density filter 22, thereby fixing the neutral density filter 22 to the fixing hole 251. Specifically, the connecting hole 252 has an outer peripheral side of the mounting base 25 and extends radially along the fixing hole 251. The connecting hole 252 is constructed as a threaded hole, and the fastener is threadedly engaged with the threaded hole. The fastener can rotate relative to the mounting base 25 to adjust the length of the fastener extending into the fixing hole 251. By setting the fastener, the fastener can pass through the connecting hole 252 and abut against the neutral density filter 22 in the fixing hole 251, which can both complete the installation of the neutral density filter 22 and limit the position of the neutral density filter 22, preventing the neutral density filter 22 from rotating relative to the mounting base 25 and weakening the filtering effect.

[0041] In one embodiment of this implementation, please refer to Figure 1 and Figure 2 The circuit board imaging device 100 includes a motion mechanism 30, which is mounted on a base 10 and connected to an imaging component 20. The motion mechanism 30 can drive the imaging component 20 to move relative to the base 10. With this configuration, the imaging component 20 can move to a suitable position relative to the base 10 to better image the circuit board to be tested on the base 10.

[0042] In one embodiment of this implementation, please refer to Figure 1 and Figure 2 The motion mechanism 30 includes a first slide rail 31 and a first drive member 32. The first slide rail 31 is mounted on the base 10 and slides in cooperation with the camera component 20. The first drive member 32 is used to drive the camera component 20 to slide along the first slide rail 31. This configuration allows the camera component 20 to slide relative to the base 10, so that the camera component 20 can move to a suitable position relative to the base 10.

[0043] Specifically, the mounting base 24 is slidably engaged with the first slide rail 31. The first drive component 32 is mounted on the first slide rail 31 and drives the mounting base 24 to slide relative to the first slide rail 31 via a conveyor belt.

[0044] In one embodiment of this implementation, please refer to Figure 1 and Figure 2The motion mechanism 30 includes a second slide rail 33 and a second drive member 34. The second slide rail 33 is mounted on the base 10 and slides in cooperation with the first slide rail 31. The second drive member 34 drives the first slide rail 31 to move the imaging component 20 along the second slide rail 33. The extension direction of the second slide rail 33 intersects the extension direction of the first slide rail 31. Specifically, the extension direction of the second slide rail 33 is perpendicular to the extension direction of the first slide rail 31. By setting the second slide rail 33 and the second drive member 34, the imaging component 20 can be driven in two axial directions in cooperation with the first slide rail 31 and the first drive member 32, so that the imaging component 20 can better capture images of the circuit board under test.

[0045] Please refer to the following in this embodiment: Figure 5 , Figure 5 yes Figure 1 A three-dimensional structural diagram of the imaging component 20 and part of the motion mechanism 30 of the circuit board imaging device 100 is shown. The imaging component 20 includes a lamp holder 26, which is mounted on a first slide rail 31. A polarized light source 23, constructed as a light strip, is mounted on the lamp holder 26, and the extension direction of the polarized light source 23 is the same as the extension direction of the first slide rail 31. By setting the light strip-shaped polarized light source 23, the polarized light source 23 can fully illuminate the circuit board to be inspected, so that the camera 21 can take better pictures. At the same time, the polarized light source 23 is mounted on the first slide rail 31 through the lamp holder 26 to ensure that the relative position of the polarized light source 23 and the camera 21 remains unchanged in the extension direction of the second slide rail 33, so that the polarized light source 23 and the camera 21 can move synchronously along the second slide rail 33 for supplementary lighting and picture taking.

[0046] It is understandable that the first driving component 32, the second driving component 34, and the third driving component 42 can be selected as driving components such as cylinders and motors, and the transmission method can be selected as belt drive, screw drive, worm gear drive, and gear drive.

[0047] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A circuit board imaging device, characterized in that, include: The base is used to support the circuit board to be tested; An imaging component is mounted on the base. The imaging component includes a camera, a neutral density filter (ND filter), and a polarizing light source. The ND filter is disposed at the light inlet of the camera. The polarizing light source is used to emit polarized detection light to the circuit board under test. The polarized detection light can be reflected on the circuit board under test and enter the camera through the ND filter. The polarization direction of the polarized detection light is different from the polarization direction of the ND filter.

2. The circuit board imaging device according to claim 1, characterized in that, The imaging component includes a mounting base connected to the base. The camera and the neutral density filter are both mounted on the mounting base, with the neutral density filter located on the bottom side of the camera.

3. The circuit board imaging device according to claim 2, characterized in that, The mounting base has a light-transmitting hole, and the camera and the light-reducing filter are located on opposite sides of the light-transmitting hole in the axial direction.

4. The circuit board imaging device according to claim 2, characterized in that, The camera assembly includes a mounting base connected to the mounting base and having a fixing hole, wherein the neutral density filter is disposed in the fixing hole.

5. The circuit board imaging device according to claim 4, characterized in that, The camera assembly includes a fastener. The mounting base has a connecting hole that communicates with the mounting hole. The fastener passes through the connecting hole and abuts against the neutral density filter to fix the neutral density filter in the mounting hole.

6. The circuit board imaging device according to claim 1, characterized in that, The circuit board imaging device includes a motion mechanism, which is mounted on the base and connected to the imaging component. The motion mechanism can drive the imaging component to move relative to the base.

7. The circuit board imaging device according to claim 6, characterized in that, The motion mechanism includes a first slide rail and a first drive member. The first slide rail is mounted on the base and slides in cooperation with the camera component. The first drive member is used to drive the camera component to slide along the first slide rail.

8. The circuit board photographing device according to claim 7, characterized in that, The motion mechanism includes a second slide rail and a second drive member. The second slide rail is mounted on the base and slides in cooperation with the first slide rail. The second drive member is used to drive the first slide rail to move the camera component along the second slide rail. The extension direction of the second slide rail intersects with the extension direction of the first slide rail.

9. The circuit board imaging device according to claim 1, characterized in that, The circuit board imaging device includes a carrier plate, which is slidably connected to the base. The carrier plate is used to support the circuit board to be tested and can drive the circuit board to be tested to slide relative to the base.

10. The circuit board imaging device according to claim 1, characterized in that, The polarized light source includes a supplementary light and a polarizer. The polarizer is disposed at the light-emitting position of the supplementary light. The supplementary light emits light towards the polarizer, and the light passes through the polarizer to form the polarization detection light.

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