Rapid optical imaging device based on mirror surface component detection
By combining a line scan camera with a combined light source, the problem of poor imaging in the inspection of mirror components is solved, and a fast and accurate inspection effect is achieved.
Patent Information
- Application Number
- CN202423085170.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing technologies struggle to effectively image mirror components, resulting in low detection efficiency, especially when the component's position and tilt angle differ, leading to poor imaging results.
A line scan camera combined with a combined light source, including a coaxial light source and a dome light source, is used to ensure that the mirror components are always located in the center of the imaging system during the scanning process. The combined light source forms light reflection within a 180° range, enabling effective imaging of components at any tilt angle.
It enables rapid and accurate detection of mirror components, and can detect defects such as breakage, misalignment and missing parts in a short time, thus improving detection efficiency.
Smart Images
Figure CN223581738U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mirror component detection technology, and in particular to a rapid optical imaging device based on mirror component detection. Background Technology
[0002] In PCB products, there are components with a mirror-like surface and strong reflectivity. During the production and soldering of such mirror-like components, due to differences in solder amount, temperature, and the components themselves, the position and tilt angle of the components on the PCB board will be different. Because the surface of the component is mirror-like, different tilt degrees result in different directions of light reflection.
[0003] Traditionally, a microscope is used manually to place each mirrored component on the PCB board at the exact center of the microscope in order to effectively detect defects such as breakage, misalignment, and missing parts. Because there are many such components on the PCB board, the overall detection efficiency is very low.
[0004] like Figure 1 As shown, in existing technologies, an area array camera is used in conjunction with a ring light source to image mirror components. Only when the mirror component is horizontal and centered on the ring light source can the light reflected from the component's surface be reflected into the camera, resulting in effective imaging (high brightness on the component's surface). Figure 2 As shown; when the components are offset or tilted, the angle of the light emitted by the ring light source is limited, and no light is reflected from the surface of the components into the camera, resulting in poor imaging (the components appear black), such as... Figure 3 As shown.
[0005] Neither of the above two methods can effectively achieve a uniform image on the surface of mirrored components. Summary of the Invention
[0006] The technical problem to be solved by this utility model is to provide a rapid optical imaging device based on the detection of mirror components in order to solve the problems existing in the prior art mentioned above.
[0007] The technical solution adopted by this utility model to solve its technical problem is: a rapid optical imaging device based on the detection of mirror components, including a mounting frame disposed on one side of the transmission line of the mirror component, a longitudinal linear module disposed on the upper part of the mounting frame, a line scanning camera mounted on the longitudinal linear module, and a combined light source mounted on the mounting frame below the longitudinal linear module. The combined light source includes a coaxial light source and a dome light source. The coaxial light source is coaxial with the lens of the line scanning camera. The dome light source is disposed below the coaxial light source, and the distance between the two is 10mm. The distance from the bottom surface of the dome light source to the surface of the mirror component is 20mm, and the distance from the bottom surface of the line scanning camera to the surface of the mirror component is 300mm.
[0008] Furthermore, a first connecting frame is connected to the slider of the longitudinal linear module, and the line scan camera is vertically mounted on the first connecting frame.
[0009] Furthermore, the line scan camera includes a camera body, a lens, and a control box. The camera body is mounted on the bottom surface of the first connecting frame, the lens is mounted on the bayonet of the camera body, and the control box is mounted on the surface of the first connecting frame. A cooling fan is installed on the surface of the control box.
[0010] Furthermore, a second connecting frame is connected to the mounting bracket, and one side of the dome light source is connected to the second connecting frame.
[0011] Furthermore, a third connecting frame is connected to the top surface of the second connecting frame. The third connecting frame includes a vertical plate and a horizontal plate. The vertical plate is fixed to the top surface of the second connecting frame, the horizontal plate is connected to the upper part of the vertical plate, and the coaxial light source is connected to the bottom surface of the horizontal plate.
[0012] Furthermore, the coaxial light source includes a housing, with a light inlet and a light outlet opposite to each other on the top and bottom surfaces of the housing. A light-transmitting lens is provided on the light inlet, and a beam splitter is obliquely arranged below the light-transmitting lens inside the housing. One end of the beam splitter is located on one side wall of the housing, and the other end is located on the top wall of the housing. A diffuser plate is vertically arranged on one side of the beam splitter, and an LED assembly is vertically arranged on one side of the diffuser plate near the other side wall of the housing.
[0013] Furthermore, the dome light source includes a housing, the top surface of which is provided with a light inlet corresponding to the light outlet of the coaxial light source, and a hemispherical reflector is provided inside the housing, with a ring-shaped LED assembly arranged around the bottom edge of the reflector.
[0014] Furthermore, both the LED assembly and the ring LED assembly use white LEDs.
[0015] The beneficial effects of this utility model are as follows: This utility model uses a line scan camera combined with a combined light source. During the scanning process, the mirror component is always placed at the center of the imaging system. Through the combined light source, light rays at any angle within a 180° range are formed on the upper surface of the component. For any tilted component, light rays at a corresponding angle are reflected into the camera, thereby effectively imaging the surface of the component in bright field and forming a high contrast difference with the background. Ultimately, it can effectively detect defects such as breakage, misalignment, and missing parts, and can quickly image and efficiently and accurately detect the corresponding defects. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0017] Figure 1 This is a schematic diagram of optical imaging for the inspection of mirror components in existing technology; among which, Figure 1 (a) is a schematic diagram of optical imaging with the mirror component horizontally centered; Figure 1 (b) is a schematic diagram of optical imaging with horizontal offset of the mirror components; Figure 1 (c) is a schematic diagram of optical imaging with the mirror component tilted and centered.
[0018] Figure 2 This is the imaging effect of existing technology where the mirror component is located at the center of the ring light source.
[0019] Figure 3 This is the imaging effect of existing technology where mirror components are offset from the center of the ring light source.
[0020] Figure 4 This is a schematic diagram of the structure of this utility model.
[0021] Figure 5 yes Figure 4 The main view.
[0022] Figure 6 yes Figure 4 Side view.
[0023] Figure 7 This is a schematic diagram of the coaxial light source in this utility model.
[0024] Figure 8 This is a schematic diagram of the structure of the dome light source in this utility model.
[0025] Figure 9 This is a schematic diagram of the optical imaging of this utility model; wherein, Figure 9 (a) is a schematic diagram of optical imaging with the mirror component horizontally centered; Figure 9 (b) is a schematic diagram of optical imaging with horizontal offset of the mirror components; Figure 9 (c) is a schematic diagram of optical imaging with the mirror component tilted and centered.
[0026] Figure 10 This is an image of the imaging effect of this utility model.
[0027] In the diagram: 1. Mounting bracket; 2. Longitudinal linear module; 3. Linear scanning camera; 31. Camera body; 32. Lens; 33. Control box; 34. Cooling fan; 4. Coaxial light source; 41. Housing; 42. Light transmission mirror; 43. Beam splitter; 44. Diffuser plate; 45. LED assembly; 5. Dome light source; 51. Housing; 52. Reflector plate; 53. Ring LED assembly; 6. First connecting bracket; 7. Second connecting bracket; 8. Third connecting bracket; 81. Vertical plate; 82. Horizontal plate. Detailed Implementation
[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0029] like Figures 4-6 As shown, a rapid optical imaging device based on the detection of mirror components includes a mounting frame 1 disposed on one side of the mirror component transmission line. A longitudinal linear module 2 is disposed on the upper part of the mounting frame 1, and a line scanning camera 3 is mounted on the longitudinal linear module 2. A combined light source is mounted on the mounting frame 1 below the longitudinal linear module 2. The combined light source includes a coaxial light source 4 and a dome light source 5. The coaxial light source 4 is coaxial with the lens 32 of the line scanning camera 3. The dome light source 5 is disposed below the coaxial light source 4, and the distance between the two is 10mm. The distance from the bottom surface of the dome light source 5 to the surface of the mirror component is 20mm, and the distance from the bottom surface of the line scanning camera to the surface of the mirror component is 300mm.
[0030] Specifically, a first connecting bracket 6 is connected to the slider of the vertical linear module 2, and the line scan camera 3 is vertically mounted on the first connecting bracket 6. The line scan camera 3 includes a camera body 31, a lens 32, and a control box 33. The camera body 31 is mounted on the bottom surface of the first connecting bracket 6, the lens 32 is mounted on the bayonet of the camera body 31, and the control box 33 is mounted on the surface of the first connecting bracket 6. A cooling fan 34 is mounted on the surface of the control box 33.
[0031] A second connecting frame 7 is connected to the mounting bracket 1, and one side of the dome light source 5 is connected to the second connecting frame 7. A third connecting frame 8 is connected to the top surface of the second connecting frame 7. The third connecting frame 8 includes a vertical plate 81 and a horizontal plate 82. The vertical plate 81 is fixed to the top surface of the second connecting frame 7, and the horizontal plate 82 is connected to the upper part of the vertical plate 81. The coaxial light source 4 is connected to the bottom surface of the horizontal plate 82.
[0032] like Figure 7 As shown, the coaxial light source 4 includes a housing 41. The top and bottom surfaces of the housing 41 are provided with a light inlet and a light outlet, respectively. A light-transmitting lens 42 is provided on the light inlet. A beam splitter 43 is obliquely arranged below the light-transmitting lens 42 inside the housing 41. One end of the beam splitter 43 is located on one side wall of the housing 41, and the other end is located on the top wall of the housing 41. A diffuser plate 44 is vertically arranged on one side of the beam splitter 43. An LED assembly 45 (PCB board and LEDs mounted on the PCB board) is vertically arranged on one side of the diffuser plate 44 near the other side wall of the housing 41.
[0033] like Figure 8As shown, the dome light source 5 includes a housing 51. The top surface of the housing 51 has a light inlet corresponding to the light outlet of the coaxial light source 4. Inside the housing 51, there is a hemispherical reflector 52, and a ring-shaped LED assembly 53 is arranged around the bottom edge of the reflector 52. Preferably, both the LED assembly 45 and the ring-shaped LED assembly 52 are white LEDs.
[0034] like Figure 9 As shown, Figure 9 (a) The mirrored components are horizontally centered. Figure 9 (b) The mirrored components are horizontally offset. Figure 9 (c) The mirror component is tilted and centered. Regardless of whether the mirror component is offset or tilted, light rays at a corresponding angle are reflected from the surface of the mirror component into the line scan camera 3, forming an effective image. That is, the surface of the mirror component reflects bright light, such as... Figure 10 As shown, the product is scanned and imaged in one scan using the line scan camera 3. The imaging time is fast, and it can achieve good imaging of mirror components at any location on the product.
[0035] The rapid optical imaging device based on mirror component detection in this embodiment combines a coaxial light source 4 with a dome light source 5, providing 180° light coverage above the mirror component. Therefore, as long as the mirror component is within the coverage area of the light source, regardless of whether the mirror component is offset or tilted, light of the corresponding angle will be reflected from the surface of the mirror component into the line scan camera 3, forming an effective image (high brightness of the mirror component surface). This allows for rapid and stable imaging within a limited time.
[0036] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A rapid optical imaging device based on the detection of mirror components, comprising a mounting bracket (1) disposed on one side of the transmission line of the mirror components, characterized in that: The upper part of the mounting bracket (1) is provided with a longitudinal linear module (2), and a line scan camera (3) is installed on the longitudinal linear module (2). A combined light source is installed on the mounting bracket (1) below the longitudinal linear module (2). The combined light source includes a coaxial light source (4) and a dome light source (5). The coaxial light source (4) is coaxial with the lens (32) of the line scan camera (3). The dome light source (5) is located below the coaxial light source (4), and the distance between the two is 10mm. The distance from the bottom surface of the dome light source (5) to the surface of the mirror component is 20mm, and the distance from the bottom surface of the line scan camera (3) to the surface of the mirror component is 300mm.
2. The rapid optical imaging device based on mirror component detection according to claim 1, characterized in that: The slider of the longitudinal linear module (2) is connected to the first connecting frame (6), and the line scan camera (3) is vertically mounted on the first connecting frame (6).
3. The rapid optical imaging device based on mirror component detection according to claim 2, characterized in that: The line scan camera (3) includes a camera body (31), a lens (32) and a control box (33). The camera body (31) is mounted on the bottom surface of the first connecting frame (6). The lens (32) is mounted on the bayonet of the camera body (31). The control box (33) is mounted on the surface of the first connecting frame (6). A cooling fan (34) is mounted on the surface of the control box (33).
4. The rapid optical imaging device based on mirror component detection according to claim 1, characterized in that: A second connecting frame (7) is connected to the mounting frame (1), and one side of the dome light source (5) is connected to the second connecting frame (7).
5. The rapid optical imaging device based on mirror component detection according to claim 4, characterized in that: The top surface of the second connecting frame (7) is connected to a third connecting frame (8). The third connecting frame (8) includes a vertical plate (81) and a horizontal plate (82). The vertical plate (81) is fixed to the top surface of the second connecting frame (7). The horizontal plate (82) is connected to the upper part of the vertical plate (81). The coaxial light source (4) is connected to the bottom surface of the horizontal plate (82).
6. The rapid optical imaging device based on mirror component detection according to claim 1, characterized in that: The coaxial light source (4) includes a housing (41). The top and bottom surfaces of the housing (41) are provided with light inlets and light outlets respectively. A light inlet is provided with a light-transmitting lens (42). A beam splitter (43) is obliquely arranged below the light-transmitting lens (42) inside the housing (41). One end of the beam splitter (43) is located on one side wall of the housing (41), and the other end is located on the top wall of the housing (41). A diffuser plate (44) is vertically arranged on one side of the beam splitter (43). An LED assembly (45) is vertically arranged on one side of the diffuser plate (44) near the other side wall of the housing (41).
7. The rapid optical imaging device based on mirror component detection according to claim 6, characterized in that: The dome light source (5) includes a housing (51), the top surface of which is provided with a light inlet corresponding to the light outlet of the coaxial light source (4), and a hemispherical reflector (52) is provided inside the housing (51), with a ring LED assembly (53) arranged around the bottom edge of the reflector (52).
8. The rapid optical imaging device based on mirror component detection according to claim 7, characterized in that: Both the LED assembly (45) and the ring LED assembly (53) use white LEDs.