PCB copper layer position detection device based on optical fiber light guide and FA lens convergence

Abstract

The application discloses a PCB copper layer position detection device based on optical fiber light guiding and FA lens convergence, and relates to the technical field of PCB copper layer position detection. The PCB copper layer position detection device based on optical fiber light guiding and FA lens convergence comprises an optical fiber light source, a plane mirror for receiving a light beam and reflecting the light beam, an FA converging lens for converging and collimating the incident light beam and compressing the light beam divergence angle to converge the light spot, a half-transmission half-reflection beam splitter, a detection camera and an oblique probe for receiving the light beam and reflecting the light beam to the copper layer. The light reflected by the copper layer is reversely injected into the oblique probe along the original light path, is folded back to the half-transmission half-reflection beam splitter, is transmitted through the half-transmission half-reflection beam splitter and is injected into the detection camera to complete imaging collection. The device further comprises a position adjusting device connected to the FA converging lens. The device can converge the light beam to reliably detect each position on the copper layer.

Description

Technical Field

[0001] This application relates to the technical field of PCB copper layer position detection, and in particular to a PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence. Background Technology

[0002] PCBs are the core conductive carriers of electronic devices. With the widespread adoption of HDI (High-Density Interconnect) boards and ultra-thin circuits, the positional accuracy of the copper layer directly determines the circuit impedance and conductivity reliability. Defects such as copper layer misalignment, missing copper, and alignment deviation can cause short circuits and signal distortion. Therefore, high-precision online positioning and inspection of the copper layer coordinates and edge contours are required during the production process. Existing conventional PCB vision inspection systems mostly use a ring-shaped diffuse surface light source paired with a common fixed-focus industrial lens. The light emitted by the light source is in a state of irregular scattering, and a large amount of stray light directly hits the PCB copper foil surface, forming a strong mirror reflection. The grayscale difference between the substrate and the copper layer is greatly weakened, and the edge contour of the copper layer is blurred. Ordinary lenses lack a targeted beam-converging design, and parallel incident light cannot be reliably focused onto the copper layer area to be tested. The effective imaging light throughput is low, and weak copper layer boundary features are easily covered by background noise. Small positional deviations can easily lead to missed or false detections. Summary of the Invention

[0003] In order to reliably detect various positions on the copper layer by focusing the light beam, this application provides a PCB copper layer position detection device based on fiber optic light guiding and FA lens focusing.

[0004] The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence provided in this application adopts the following technical solution: A PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence, comprising: Fiber optic light source, used to emit a beam of light; A plane mirror is disposed in the output optical path of the fiber optic light source to receive and reflect the light beam; A convergent FA lens is disposed on the outgoing light path of the plane mirror. The convergent FA lens is used to converge and collimate the incident light beam and compress the beam divergence angle to narrow the light spot. A semi-transparent, semi-reflective beam splitter is disposed in the output light path of the FA converging lens; A detection camera is located on one side of a semi-transparent, semi-reflective beam splitter. A beveled probe is used to receive and reflect a light beam to the copper layer. The beveled probe is located on the outgoing light path of the semi-transparent and semi-reflective beam splitter and is located on the side of the semi-transparent and semi-reflective beam splitter away from the detection camera. The copper layer reflects the light back and it enters the beveled probe in the opposite direction along the original light path. After being reflected back by the beveled probe, it enters the semi-transparent and semi-reflective beam splitter. The reflected light is transmitted through the semi-transparent and semi-reflective beam splitter and enters the detection camera to complete the imaging acquisition. It also includes an adjustment device, which is connected to the FA converging lens and is used to move the FA converging lens in a direction perpendicular to the optical path, thereby shifting the light spot projected onto the copper layer.

[0005] By employing the above technical solution, the fiber optic light source emits a beam to a plane mirror, which reflects the beam to the FA converging lens. The FA converging lens converges and collimates the beam, compressing the beam divergence angle to narrow the beam spot. The beam then reaches a semi-transparent, semi-reflective beam splitter and is reflected by it to a bevel probe. The beam is then reflected again by the bevel probe to the copper layer. The reflected light from the copper layer travels back along the original optical path and enters the bevel probe. After being reflected back by the bevel probe, it enters the semi-transparent, semi-reflective beam splitter. The reflected light is transmitted through the semi-transparent, semi-reflective beam splitter and then enters the detection camera to complete the image acquisition. By driving the adjustment device, the position of the FA converging lens can be finely adjusted to change the position of the emitted beam, thereby changing the position of the beam spot projected onto the copper layer, thus enabling reliable detection of various locations on the copper layer.

[0006] The fiber optic light source with directional light output, combined with the FA converging lens, significantly suppresses stray light and eliminates the problem of insufficient grayscale difference in imaging caused by reflections on the copper layer, resulting in clear imaging of the copper layer edge contours. The coaxial folding optical path ensures that the incident light spot is coaxially aligned with the imaging field of view, and the position of the light spot is adjustable, which can accurately capture minute offsets and edge defects in the copper layer, reducing the probability of missed detections and false detections.

[0007] Preferably, it also includes a housing, in which the fiber optic light source, plane mirror, FA converging lens, and semi-transparent semi-reflective beam splitter are all integrated and installed. The interior of the housing forms a sealed channel along the optical path. The plane mirror is located below the fiber optic light source, the FA converging lens is located to the right of the plane mirror, the semi-transparent semi-reflective beam splitter is located to the right of the FA converging lens, the detection camera is located above the semi-transparent semi-reflective beam splitter, and the angled probe is located below the semi-transparent semi-reflective beam splitter.

[0008] By adopting the above technical solutions, the sealed channel isolates workshop dust, water vapor, and stray light from the environment, avoiding contamination of related components and optical path deviation, significantly improving long-term detection stability and reducing the frequency of equipment cleaning and maintenance.

[0009] Preferably, the positioning device includes a horizontal lead screw drive mechanism installed inside the housing and a vertical lead screw drive mechanism connected to the output end of the horizontal lead screw drive mechanism, and the FA converging lens is installed at the output end of the vertical lead screw drive mechanism.

[0010] By adopting the above technical solution, the horizontal lead screw drive mechanism and the vertical lead screw drive mechanism form a two-dimensional translation drive structure, which can drive the FA converging lens to be independently fine-tuned in two directions perpendicular to the optical path, resulting in higher adjustment accuracy.

[0011] Preferably, it also includes a drive component installed on the housing, the drive component being connected to a rotating disk, and multiple beveled probes being provided, each of the beveled probes being snapped into the rotating disk, the multiple beveled probes being distributed along the circumference of the rotating disk.

[0012] By adopting the above technical solution, the drive component drives the rotating disk to rotate, which can quickly switch between different specifications and angles of bevel probes. It can replace the appropriate probes for different PCB copper layer conditions such as thick copper, thin copper, micro-circuit, and large pads. There is no need to disassemble the whole machine, the switching efficiency is high, and the equipment is more versatile.

[0013] Preferably, the rotating disk includes a snap-fit ​​groove at the top end, and the rotating disk also has a mounting groove communicating with the snap-fit ​​groove. A pressing block is slidably connected to the mounting groove, and a pressing spring is provided in the mounting groove. The two ends of the pressing spring are respectively connected to the mounting groove and the pressing block.

[0014] By adopting the above technical solution, after the beveled probe is inserted into the snap-fit ​​slot, the pressure spring pushes the pressure block to press the outer wall of the beveled probe, thereby achieving quick snap-fit ​​and fixation of the beveled probe; during disassembly and assembly, only external force is needed to pull out the beveled probe to automatically loosen it, the beveled probe replacement operation is simple, it is firmly fixed without shaking, and avoids light spot displacement during detection.

[0015] Preferably, the pressing block has a pressing slope that slopes downwards toward the center of the locking groove.

[0016] By adopting the above technical solution, the inclined pressure slope can facilitate the insertion of the inclined probe.

[0017] Preferably, a lifting drive component is installed on the housing below the rotating disk, the lifting drive component is connected to a suction cup component, the snap-fit ​​groove is vertically through, and the lifting drive component can drive the suction cup component to adhere to the angled probe.

[0018] By adopting the above technical solution, when the rotating disk drives one of its angled probes to rotate above the suction cup, the driving lifting mechanism can lift the suction cup and attach it to the angled probe. At this time, driving the lifting mechanism to move up and down can move the angled probe up and down, thereby changing the position of the light spot projected onto the copper layer.

[0019] Preferably, a dust-collecting component is provided on the housing on the side of the oblique probe.

[0020] By adopting the above technical solution, the dust extraction component continuously removes dust and ink debris from the bevel probe and the copper layer side, preventing impurities from obscuring the copper layer boundary and causing imaging noise, preventing dust from wearing down the bevel probe end face, extending the service life of the bevel probe, and continuously ensuring imaging clarity.

[0021] Preferably, both the plane mirror and the semi-transparent beam splitter are detachably connected to the housing via fasteners.

[0022] By adopting the above technical solutions, both the plane mirror and the semi-transparent beam splitter can be easily disassembled, cleaned, or replaced.

[0023] In summary, the present invention has at least one of the following beneficial technical effects: 1. This application enables the following detection actions: A fiber optic light source emits a beam to a plane mirror, which reflects the beam to an FA converging lens. The FA converging lens converges and collimates the beam, compressing the beam divergence angle to narrow the beam spot. The beam then reaches a semi-transparent, semi-reflective beam splitter and is reflected by the splitter to a bevel probe. The beam is then reflected again by the bevel probe to the copper layer. The reflected light from the copper layer travels back along the original optical path and enters the bevel probe. After being reflected back by the bevel probe, it enters the semi-transparent, semi-reflective beam splitter. The reflected light is transmitted through the splitter and then enters the detection camera to complete image acquisition. By driving the adjustment device, the position of the FA converging lens can be finely adjusted to change the position of the emitted beam, thereby changing the position of the beam spot projected onto the copper layer, thus enabling reliable detection of various locations on the copper layer. The fiber optic light source with directional light output, combined with the FA converging lens, significantly suppresses scattered stray light and eliminates the problem of insufficient grayscale difference in imaging caused by reflections on the copper layer, resulting in clear imaging of the copper layer edge contours. The coaxial folding optical path ensures that the incident light spot is coaxially aligned with the imaging field of view, and the position of the light spot is adjustable, which can accurately capture tiny offsets and edge defects in the copper layer, reducing the probability of missed detections and false detections. 2. The drive mechanism rotates the rotating disk, allowing for rapid switching between different specifications and angled probes. This enables adapting probes to different PCB copper layer conditions, such as thick copper, thin copper, micro-circuits, and large pads, without requiring complete machine disassembly. This results in high switching efficiency and greater equipment versatility. After the angled probe is inserted into the slot, a pressure spring pushes a pressure block to press against the outer wall of the probe, achieving rapid and secure locking. Disassembly is simple; the probe automatically releases itself by simply pulling it out with external force. The angled probe replacement is easy, and the secure fixation prevents light spot shifting during testing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the PCB copper layer position detection device based on optical fiber light guide and FA lens convergence in the embodiments of this application; Figure 2 This is a front cross-sectional view of a PCB copper layer position detection device based on fiber optic light guide and FA lens convergence. Figure 3 It is a cross-sectional view used to illustrate the pressure block.

[0025] The following components are labeled in the attached diagram: 1. Fiber optic light source; 2. Plane mirror; 3. FA converging lens; 4. Semi-transparent and semi-reflective beam splitter; 5. Inspection camera; 6. Angled probe; 7. Housing; 71. Sealed channel; 8. Driving component; 81. Rotating disk; 811. Snap-fit ​​groove; 812. Mounting groove; 82. Pressing block; 821. Pressing inclined surface; 83. Pressing spring; 84. Dust collection component; 85. Lifting drive component; 86. Suction cup component; 9. Positioning device; 91. Horizontal lead screw drive mechanism; 92. Vertical lead screw drive mechanism. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0028] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0029] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0030] This application discloses a PCB copper layer position detection device based on fiber optic light guiding and FA lens focusing. It is used to focus a light beam for reliable detection of various positions on the copper layer.

[0031] Reference Figure 1 and Figure 2The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence includes a fiber optic light source 1, a plane mirror 2, an FA converging lens 3, a semi-transparent and semi-reflective beam splitter 4, a detection camera 5, and a beveled probe 6. The fiber optic light source 1 emits a light beam. The plane mirror 2 is positioned on the output optical path of the fiber optic light source 1 and is used to receive and reflect the light beam. The FA converging lens 3 is positioned on the output optical path of the plane mirror 2 and is used to converge and collimate the incident light beam and compress the beam divergence angle to narrow the light spot. The semi-transparent and semi-reflective beam splitter 4 is positioned on the output optical path of the FA converging lens 3 and is used to reflect the light beam and transmit visible light. The detection camera 5 is positioned on one side of the semi-transparent and semi-reflective beam splitter 4. The beveled probe 6 is used to receive and reflect the light beam to the copper layer. The beveled probe 6 is positioned on the output optical path of the semi-transparent and semi-reflective beam splitter 4 and is located on the side of the semi-transparent and semi-reflective beam splitter 4 furthest from the detection camera 5. In other embodiments, the FA converging lens 3 can also be replaced by any one of a GRIN self-focusing lens, a C-lens spherical thick lens, or an aspherical collimating lens.

[0032] A beam of light is emitted from fiber optic source 1 to plane mirror 2. The beam is reflected by plane mirror 2 to FA converging lens 3. FA converging lens 3 converges and collimates the beam and compresses the beam divergence angle to narrow the beam spot. The beam then reaches semi-transparent and semi-reflective beam splitter 4 and is reflected by semi-transparent and semi-reflective beam splitter 4 to bevel probe 6. It is then reflected by bevel probe 6 to reach copper layer. The reflected light from copper layer is reversed along the original optical path and enters bevel probe 6. After being reflected by bevel probe 6, it enters semi-transparent and semi-reflective beam splitter 4. The reflected light is transmitted through semi-transparent and semi-reflective beam splitter 4 and enters detection camera 5 to complete the imaging acquisition.

[0033] Reference Figure 1 and Figure 2 To minimize the impact of dust, moisture, and other factors on the aforementioned components and prevent contamination, the PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence also includes a housing 7. The fiber optic light source 1, plane mirror 2, FA converging lens 3, and semi-transparent / semi-reflective beam splitter 4 are all integrated and installed within the housing 7. The interior of the housing 7 forms a sealed channel 71 along the optical path. Specifically, the plane mirror 2 is located below the fiber optic light source 1, which emits a beam downwards. The plane mirror 2 is tilted downwards at a 45° angle from left to right. The FA converging lens 3 is located to the right of the plane mirror 2 and is arranged horizontally. The semi-transparent / semi-reflective beam splitter 4 is located to the right of the FA converging lens 3 and is tilted downwards at a 45° angle from left to right. The detection camera 5 is located above the semi-transparent / semi-reflective beam splitter 4, facing downwards. The angled probe 6 is located below the semi-transparent / semi-reflective beam splitter 4.

[0034] Reference Figure 2In order to switch between different types of probes to adapt to different PCB copper layer conditions such as thick copper, thin copper, micro-circuit, and large pads, the housing 7 is equipped with a drive component 8, such as a servo motor. The drive component 8 is connected to a rotating disk 81. Multiple beveled probes 6 are provided, each of which is snapped into the rotating disk 81. The multiple beveled probes 6 are distributed along the circumference of the rotating disk 81.

[0035] Reference Figure 2 and Figure 3 Specifically, the rotating disk 81 includes a snap-fit ​​groove 811 at the top, and the rotating disk 81 also has a mounting groove 812 communicating with the snap-fit ​​groove 811. A pressing block 82 is slidably connected to the mounting groove 812, and a pressing spring 83 is provided in the mounting groove 812. The two ends of the pressing spring 83 are respectively connected to the mounting groove 812 and the pressing block 82. In order to facilitate the insertion of the beveled probe 6 into the snap-fit ​​groove 811, the pressing block 82 has a pressing slope 821 that slopes downwards towards the middle of the snap-fit ​​groove 811.

[0036] During the insertion of the beveled probe 6 into the snap-fit ​​slot 811, the beveled probe 6 presses against the beveled surface 821, causing the pressing block 82 to move away from the snap-fit ​​slot 811 to make room. The pressing spring 83 is compressed. After the beveled probe 6 is inserted into the snap-fit ​​slot 811, the pressing spring 83 pushes the pressing block 82 to press against the outer wall of the beveled probe 6, thereby achieving quick snap-fit ​​and fixation of the beveled probe 6. During disassembly and assembly, only external force is needed to pull out the beveled probe 6 to automatically release it. The replacement of the beveled probe 6 is simple.

[0037] Reference Figure 2 A dust-collecting component 84 is provided on the housing 7 on one side of the bevel probe 6. The specific structure of the dust-collecting component 84 is existing technology and will not be described in detail here. The dust-collecting component 84 can continuously remove dust and ink debris from the bevel probe 6 and the copper layer side, preventing impurities from obscuring the copper layer boundary and causing imaging noise, preventing dust from wearing down the end face of the bevel probe 6, extending the service life of the bevel probe 6, and continuously ensuring imaging clarity.

[0038] Reference Figure 2 Both the plane mirror 2 and the semi-transparent beam splitter 4 are detachably connected to the housing 7 by fasteners such as bolts. Both the plane mirror 2 and the semi-transparent beam splitter 4 can be easily disassembled for cleaning or replacement.

[0039] Reference Figure 2To facilitate adjustment of the beam position output by the FA converging lens 3 to change the position of the light spot projected onto the copper layer, the PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence also includes an adjustment device 9. The adjustment device 9 is installed inside the housing 7, and its output end is connected to the FA converging lens 3. Specifically, the adjustment device 9 includes a horizontal lead screw drive mechanism 91 installed inside the housing 7 and a vertical lead screw drive mechanism 92 connected to the output end of the horizontal lead screw drive mechanism 91. The specific structures of the horizontal lead screw drive mechanism 91 and the vertical lead screw drive mechanism 92 are existing technologies and will not be described in detail here. The FA converging lens 3 is installed at the output end of the vertical lead screw drive mechanism 92. The horizontal lead screw drive mechanism 91 is used to drive the FA converging lens 3 to move back and forth, and the vertical lead screw drive mechanism 92 is used to drive the FA converging lens 3 to move up and down. The horizontal lead screw drive mechanism 91 and the vertical lead screw drive mechanism 92 form a two-dimensional translation drive structure, which can drive the FA converging lens 3 to independently fine-tune along two directions perpendicular to the optical path.

[0040] Reference Figure 2 and Figure 3 To further fine-tune the position of the light spot projected onto the copper layer, a lifting drive component 85 is installed on the housing 7 below the rotating disk 81. The lifting drive component 85 is connected to a suction cup component 86, with a vertically extending locking groove 811. The lifting drive component 85 can drive the suction cup component 86 to adhere to the angled probe 6. When the rotating disk 81 rotates one of its angled probes 6 above the suction cup component 86, driving the lifting drive component 85 to lift the suction cup component 86 allows it to adhere to the angled probe 6. At this time, driving the lifting drive component 85 to move up and down will move the angled probe 6 up and down, thereby changing the position of the light spot projected onto the copper layer, i.e., changing the detection position.

[0041] The implementation principle of the PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence in the application embodiment is as follows: A beam of light is emitted from fiber optic source 1 to plane mirror 2. The beam is reflected by plane mirror 2 to FA converging lens 3. FA converging lens 3 converges and collimates the beam and compresses the beam divergence angle to narrow the beam spot. The beam then reaches semi-transparent and semi-reflective beam splitter 4 and is reflected by semi-transparent and semi-reflective beam splitter 4 to bevel probe 6. It is then reflected by bevel probe 6 to reach copper layer. The reflected light from copper layer is reversed along the original optical path and enters bevel probe 6. After being reflected by bevel probe 6, it enters semi-transparent and semi-reflective beam splitter 4. The reflected light is transmitted through semi-transparent and semi-reflective beam splitter 4 and enters detection camera 5 to complete the imaging acquisition.

[0042] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence, characterized in that: include Fiber optic light source (1) is used to emit a light beam; A plane mirror (2) is disposed on the outgoing optical path of the fiber optic light source (1) to receive and reflect the light beam; The FA converging lens (3) is disposed on the outgoing light path of the plane mirror (2). The FA converging lens (3) is used to converge and collimate the incident beam and compress the beam divergence angle to close the light spot. A semi-transparent and semi-reflective beam splitter (4) is disposed on the outgoing light path of the FA converging lens (3); The detection camera (5) is located on one side of the semi-transparent and semi-reflective beam splitter (4); A beveled probe (6) is used to receive and reflect the light beam to the copper layer. The beveled probe (6) is located on the outgoing light path of the semi-transparent and semi-reflective beam splitter (4) and on the side of the semi-transparent and semi-reflective beam splitter (4) away from the detection camera (5). The copper layer reflects the light back and it enters the beveled probe (6) in the opposite direction along the original light path. After being reflected back by the beveled probe (6), it enters the semi-transparent and semi-reflective beam splitter (4). The reflected light is transmitted through the semi-transparent and semi-reflective beam splitter (4) and then enters the detection camera (5) to complete the imaging acquisition. It also includes a positioning device (9), which is connected to the FA converging lens (3). The positioning device (9) is used to drive the FA converging lens (3) to move in a direction perpendicular to the optical path, thereby shifting the light spot projected onto the copper layer.

2. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 1, characterized in that: It also includes a housing (7), in which the fiber optic light source (1), plane mirror (2), FA converging lens (3), and semi-transparent and semi-reflective beam splitter (4) are all integrated and installed. The interior of the housing (7) forms a closed channel (71) along the optical path. The plane mirror (2) is located below the fiber optic light source (1), the FA converging lens (3) is located to the right of the plane mirror (2), the semi-transparent and semi-reflective beam splitter (4) is located to the right of the FA converging lens (3), the detection camera (5) is located above the semi-transparent and semi-reflective beam splitter (4), and the angled probe (6) is located below the semi-transparent and semi-reflective beam splitter (4).

3. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 2, characterized in that: The adjustment device (9) includes a horizontal lead screw drive mechanism (91) installed inside the housing (7) and a vertical lead screw drive mechanism (92) connected to the output end of the horizontal lead screw drive mechanism (91). The FA converging lens (3) is installed at the output end of the vertical lead screw drive mechanism (92).

4. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 2, characterized in that: It also includes a drive component (8) installed on the housing (7), the drive component (8) is connected to a rotating disk (81), and multiple oblique probes (6) are provided, each of the oblique probes (6) is snapped into the rotating disk (81), and the multiple oblique probes (6) are distributed along the circumference of the rotating disk (81).

5. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 4, characterized in that: The rotating disk (81) includes a snap-fit ​​groove (811) at the top end. The rotating disk (81) also has a mounting groove (812) communicating with the snap-fit ​​groove (811). A pressing block (82) is slidably connected to the mounting groove (812). A pressing spring (83) is provided in the mounting groove (812). The two ends of the pressing spring (83) are respectively connected to the mounting groove (812) and the pressing block (82).

6. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 5, characterized in that: The pressing block (82) has a pressing slope (821) that is inclined from top to bottom toward the middle of the snap-fit ​​groove (811).

7. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 5, characterized in that: A lifting drive component (85) is installed on the housing (7) below the rotating disk (81). The lifting drive component (85) is connected to a suction cup component (86). The snap-fit ​​groove (811) is vertically through. The lifting drive component (85) can drive the suction cup component (86) to be adsorbed on the oblique probe (6).

8. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 2, characterized in that: A dust-collecting component (84) is provided on the housing (7) on one side of the oblique probe (6).

9. The PCB copper layer position detection device based on fiber optic light guiding and FA lens convergence according to claim 2, characterized in that: Both the plane mirror (2) and the semi-transparent beam splitter (4) are detachably connected to the housing (7) by fasteners.

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