AOI angle adjustable condensation light source assembly

Abstract

The invention discloses an AOI angle adjustable condensation light source assembly which comprises a lamp box frame, a first light source, a second light source, a third light source, a first condensation piece, a second condensation piece, a first light diffusion plate and a semi-reflecting and semi-transmitting lens. At least the second light source, the third light source and the lamp box frame can rotate relatively to adjust the angle; the second light source and the third light source are arranged on the two sides of a camera connecting line of the visual camera and a detected product respectively, the first light source and the second light source or the third light source are arranged on the same side, the semi-reflecting and semi-transmitting lens is installed on the path of the camera connecting line, and the light emitting end of the first light source faces the reflecting face of the semi-reflecting and semi-transmitting lens; the first light condensing part and the second light condensing part are respectively arranged at the light emitting ends of the second light source and the third light source and are used for guiding direct illumination rays to a detected product; and the first light scattering plate is arranged at the light emitting end of the first light source and is used for guiding direct illumination rays to a detected product through the semi-reflecting and semi-transmitting lens.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of visual detection devices, and particularly relates to an AOI angle-adjustable spotlight assembly. BACKGROUND

[0002] There are various spotlight assemblies with auxiliary visual detection devices on the market, which can only provide light of one angle, and a diffuser plate is generally arranged at the last light-emitting end of each lamp source to achieve wide-angle light output. The corresponding output light effect is probably irradiated to a relatively small area. In other words, only one light beam can irradiate part of the position of the object, the low-angle light is small, the visual point is not focused, the display is planar, the limitation is large, and the object cannot be shot more realistically and stereoscopically. For example, when the detected object is a PCB, the problem of effectively distinguishing the frosted copper surface and the thread gray scale cannot be solved. SUMMARY

[0003] The application mainly aims at the above problems, and provides an AOI angle-adjustable spotlight assembly, which aims to solve the technical problems in the background art.

[0004] To achieve the above-mentioned purpose, the application provides an AOI angle-adjustable spotlight assembly, which comprises a light box frame, a first light source, a second light source, a third light source, a first light condensing piece, a second light condensing piece, a first diffuser plate and a half-reflective half-transmissive lens piece. The first light source, the second light source and the third light source are all installed on the light box frame, and at least the second light source and the third light source can be relatively rotated to adjust the angle with the light box frame. The second light source and the third light source are respectively arranged on the two sides of a visual camera and a shooting connection line of the detected product. The first light source is on the same side of the second light source or the third light source. The half-reflective half-transmissive lens piece is installed on the shooting connection line path, and the light-emitting end of the first light source faces the reflecting surface of the half-reflective half-transmissive lens piece. The first light condensing piece and the second light condensing piece are respectively arranged at the light-emitting end of the second light source and the third light source, and are used for guiding the direct light of the second light source and the third light source to the detected product. The first diffuser plate is arranged at the light-emitting end of the first light source, and is used for guiding the direct light of the first light source to the detected product through the half-reflective half-transmissive lens piece.

[0005] Further, a second diffuser plate is arranged between the second light source and the first light condensing piece, and a third diffuser plate is arranged between the third light source and the second light condensing piece.

[0006] Further, the half-reflective half-transmissive lens piece and the light box frame are adjustably connected through a support.

[0007] Further, the included angle between the direct light of the first light source and the shooting connection line is 90 degrees.

[0008] Furthermore, the first light source, the second light source, and the third light source each include an LED light strip and a heat dissipation device disposed on the back side of the LED light strip; a heat-conducting plate is connected between the LED light strip and the heat dissipation device.

[0009] Furthermore, mounting plates are provided on both sides of the heat dissipation device; a reflective layer is laid on the mounting plate corresponding to the first light source.

[0010] Furthermore, the heat dissipation device is a segmented water-cooled radiator, and the segmented water-cooled radiator is provided with a connector.

[0011] Furthermore, both the first and second focusing elements are focusing rods made of cylindrical glass.

[0012] Furthermore, the lightbox frame includes a side panel, a first protective cover, and a second protective cover, with an opening between the first and second protective covers to allow for the obstruction of a visual camera.

[0013] Furthermore, the semi-reflective mirror is connected to a light-leakage-proof baffle corresponding to the opening.

[0014] Compared with the prior art, the AOI angle-adjustable focusing light source assembly provided by the present invention can face the reflective surface of the semi-reflective mirror at the light-emitting end of the first light source; achieve 90-degree perpendicular light to the object being inspected; at least the second and third light sources and the light box frame can be rotated and adjusted relative to each other; the first and second focusing elements are respectively located at the light-emitting ends of the second and third light sources, and the angle is adjustable, which can concentrate relatively diffuse light, convert it into high-density lumen after focusing, and increase the brightness. The optical distribution of multiple low-angle light is gathered at the same point, and different planes present different brightness and darkness, making the object being inspected captured by the vision camera more three-dimensional. It realizes the ultimate representation and filtering of the PCB copper surface effect of the inspected product, realizes the filtering of the frosted texture of the outer PCB copper surface and the representation of the copper layer inside the hole, which is closer to the real situation of the inspected object. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an AOI angle-adjustable focusing light source component according to this application.

[0016] The reference numerals in the figure are as follows: 1. Side plate; 2. Heat dissipation device; 3. Heat-conducting plate; 4. Connector; 5. Mounting plate; 6. Third diffuser; 7. First condenser; 8. Mounting plate for the first light source; 9. First diffuser; 10. Reflective layer; 11. Reflective connecting plate; 12. Semi-reflective lens; 14. First protective cover; 15. Second protective cover; 17. Light leakage prevention baffle; 18. Bracket; 19. First light source; 20. Second light source; 21. Third light source; 22. Second condenser; 23. Illumination connection line; 24. Second diffuser. Detailed Implementation

[0017] Please refer to Figure 1 This embodiment provides an AOI angle-adjustable focusing light source assembly, including: a light box frame, a first light source 19, a second light source 20, a third light source 21, a first focusing element 7, a second focusing element 22, a first diffuser 9, and a semi-reflective mirror 12; the first light source 19, the second light source 20, and the third light source 21 are all mounted on the light box frame, and at least the second light source 20 and the third light source 21 can rotate relative to the light box frame to adjust their angle; the second light source 20 and the third light source 21 are respectively located on both sides of the connection line 23 between the visual camera and the product being inspected. The first light source 19 is on the same side as the second light source 20 or the third light source 21. The semi-reflective mirror 12 is installed on the path of the imaging connection line 23. The light-emitting end of the first light source 19 faces the reflective surface of the semi-reflective mirror 12. The first condenser 7 and the second condenser 22 are respectively disposed at the light-emitting ends of the second light source 20 and the third light source 21, and are used to guide their direct light rays to the product being tested. The first diffuser 9 is disposed at the light-emitting end of the first light source 19, and is used to guide its direct light rays through the semi-reflective mirror 12 to the product being tested.

[0018] By installing the semi-reflective mirror 12 along the path of the imaging connection line 23, with the light-emitting end of the first light source 19 facing the reflective surface of the semi-reflective mirror 12, the object being inspected is illuminated at a perpendicular 90-degree angle. At least the second light source 20 and the third light source 21 can rotate relative to the light box frame to adjust their angles. The first focusing element 7 and the second focusing element 22 are respectively located at the light-emitting ends of the second light source 20 and the third light source 21, and their angles are adjustable. This concentrates the relatively diffused light, converting it into high-density lumens and increasing brightness. Multiple low-angle light distributions are simultaneously gathered at the same point, and different planes exhibit different levels of brightness. The object being inspected, captured by the visual camera, appears more three-dimensional, achieving the ultimate representation and filtering of the PCB copper surface effect of the inspected product. This achieves the filtering of the frosted texture of the outer PCB copper surface and the representation of the copper layer inside the holes, making it closer to the true condition of the inspected object.

[0019] Thus, this angle-adjustable focusing light source assembly solves the problem of existing industry light sources that only provide a wide-angle, low-angle light, resulting in unfocused viewpoints and an inability to effectively distinguish the grayscale of textures after the copper surface has been frosted. Furthermore, the first light source 19 eliminates the focusing device traditionally used in light sources, saving costs while still achieving its intended function. It only requires the semi-reflective mirror 12 to be installed along the path of the imaging connection line 23, allowing the light from the first light source 19 to be projected perpendicularly and coaxially onto the object being inspected along the imaging connection line 23.

[0020] Please refer to Figure 1It includes a second diffuser plate 24 disposed between the second light source 20 and the first light-concentrating element 7, and a third diffuser plate 6 disposed between the third light source 21 and the second light-concentrating element 22.

[0021] Please refer to Figure 1 The semi-reflective lens 12 and the light box frame are rotatably and adjustablely connected via bracket 18.

[0022] Furthermore, a reflective connecting plate 11 is provided, and the semi-reflective lens 12 is connected to the bracket 18 through the reflective connecting plate 11.

[0023] Please refer to Figure 1 The angle between the direct light from the first light source 19 and the illumination connection line 23 is 90°.

[0024] Please refer to Figure 1 The first light source 19, the second light source 20, and the third light source 21 each include an LED light strip and a heat dissipation device 2 disposed on the back side of the LED light strip; a heat-conducting plate 3 is connected between the LED light strip and the heat dissipation device 2.

[0025] Please refer to Figure 1 The heat dissipation device 2 has mounting plates 5 on both sides; a reflective layer 10 is laid on the mounting plate 8 corresponding to the first light source.

[0026] The mounting plates 5 on both sides of the heat dissipation device 2 to which the second light source 20 is connected also clamp and connect the first light-concentrating element 7 and the second light-diffusing plate 24. The mounting plates 5 on both sides of the heat dissipation device 2 connected to the third light source 21 also clamp and connect the second light-concentrating element 22 and the third light-diffusing plate 6.

[0027] Please refer to Figure 1 The heat dissipation device 2 is a segmented water-cooled radiator, and the segmented water-cooled radiator is provided with a connector 4.

[0028] The segmented water-cooled heat sink connected to the back of the LED light strip uses circulating cold water to achieve reasonable heat overflow, reduce the temperature of the LED light, and increase its service life.

[0029] Please refer to Figure 1 Both the first focusing element 7 and the second focusing element 22 are cylindrical glass focusing rods.

[0030] Please refer to Figure 1 The lightbox frame includes a side plate 1, a first protective cover 14, and a second protective cover 15, with an opening between the first protective cover 14 and the second protective cover 15 to allow the visual camera to pass.

[0031] The first protective cover 14 and the second protective cover 15 are located on both sides of the camera connection line 23, and the two ends of the first protective cover 14 and the second protective cover 15 are respectively connected to two side plates 1 to form a light box frame.

[0032] The semi-reflective mirror 12 is connected to the side plate 1 via a bracket 18.

[0033] Please refer to Figure 1 The semi-reflective mirror 12 is connected to a light-blocking baffle 17 corresponding to the opening.

[0034] In summary, the second light source 20, the third light source 21, and the light box frame can rotate relative to each other to adjust the angle of the light path. The first light source 19 transmits light through the first diffuser 9 to achieve multiple angles of light and reflection from the semi-reflective mirror 12. Combined with the fixed gap, this effectively illuminates the inspected object between 90 and 10 degrees. The use of a 60-degree high-focus light, more suitable for existing products, is more conducive to imaging the frosted texture of copper sheets. Combined with thermal improvements, optical inspection capabilities are enhanced. The light source provided by this invention is applied in optical inspection industries such as AVI and AOI, improving the detection performance of fine texture defects on PCB boards.

Claims

1. An AOI angle-adjustable focusing light source assembly, characterized in that, include: Lightbox frame, first light source, second light source, third light source, first focusing element, second focusing element, first diffuser, semi-reflective mirror; The first, second, and third light sources are all mounted on the lightbox frame, and at least the second and third light sources can rotate relative to the lightbox frame to adjust their angles. The second and third light sources are respectively located on both sides of the connection line between the visual camera and the product being inspected, with the first light source on the same side as the second or third light source. The semi-reflective mirror is mounted on the path of the connection line, with the light-emitting end of the first light source facing the reflective surface of the semi-reflective mirror. The first and second light-concentrating elements are respectively located at the light-emitting ends of the second and third light sources, and are used to guide their direct light rays to the product being inspected. The first diffuser is located at the light-emitting end of the first light source, and is used to guide its direct light rays through the semi-reflective mirror to the product being inspected.

2. The AOI angle-adjustable focusing light source assembly according to claim 1, characterized in that, It includes a second diffuser plate disposed between the second light source and the first light-concentrating element, and a third diffuser plate disposed between the third light source and the second light-concentrating element.

3. The AOI angle-adjustable focusing light source assembly according to claim 1, characterized in that, The semi-reflective mirror and the light box frame are connected in an adjustable and rotatable manner via a bracket.

4. The AOI angle-adjustable focusing light source assembly according to claim 1, characterized in that, The angle between the direct light from the first light source and the illumination connection line is 90°.

5. The AOI angle-adjustable focusing light source assembly according to claim 1, characterized in that, The first light source, the second light source, and the third light source all include LED light strips and a heat dissipation device disposed on the back side of the LED light strips; a heat-conducting plate is connected between the LED light strips and the heat dissipation device.

6. The AOI angle-adjustable focusing light source assembly according to claim 5, characterized in that, The heat dissipation device has mounting plates on both sides; a reflective layer is laid on the mounting plate corresponding to the first light source.

7. The AOI angle-adjustable focusing light source assembly according to claim 5, characterized in that, The heat dissipation device is a segmented water-cooled radiator, and the segmented water-cooled radiator is equipped with a connector.

8. The AOI angle-adjustable focusing light source assembly according to claim 1, characterized in that, Both the first and second focusing elements are focusing rods made of cylindrical glass.

9. The AOI angle-adjustable focusing light source assembly according to claim 1, characterized in that, The lightbox frame includes a side panel, a first protective cover, and a second protective cover, with an opening between the first and second protective covers to allow for the obstruction of a visual camera.

10. An AOI angle-adjustable focusing light source assembly according to claim 9, characterized in that, The semi-reflective mirror is connected to a light-leakage baffle corresponding to the opening.

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