Multi-angle light source

Abstract

The utility model provides a multi-angle light source which comprises a shell, a shell cover, a diffusion plate, a first LED light source and a second LED light source. A flange protruding inwards is arranged on the inner surface of the shell; the shell cover covers the upper end of the shell, and a diffusion film is arranged on the inner surface of the shell cover; the diffusion plate is connected to the lower end of the shell. The diffusion film and the diffusion plate are oppositely arranged. The first LED light source is connected to the upper surface of the flange, the light-emitting surface of the first LED light source is opposite to the diffusion film, and the diffusion film is used for uniformizing the first LED light source and emitting a first angle light source through the diffusion plate; the second LED light source is connected to the inner surface of the shell, the light-emitting face of the second LED light source is opposite to the diffusion plate, and the diffusion plate is used for processing the second LED light source and emitting a second angle light source. A multi-angle irradiation light source of 10-80 degrees is formed through lower-layer low-angle irradiation and upper-layer high-angle irradiation, multi-angle irradiation is achieved, a detected object is comprehensively illuminated, and the detection requirement is met.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial inspection lighting, and in particular to a multi-angle light source. Background Technology

[0002] In the field of industrial automation inspection, three-dimensional automated optical inspection (3D-AOI) technology is widely used in scenarios such as PCB soldering quality inspection and electronic component mounting accuracy inspection due to its advantages of non-contact and high precision. It achieves defect identification by acquiring the three-dimensional shape of the object, but existing lighting technologies have significant shortcomings.

[0003] Traditional ring light sources have a single illumination angle, making it impossible to fully present the three-dimensional information of the object being inspected. For example, when inspecting PCB solder joints, a single angle of light cannot simultaneously and clearly display the top, sides, and connection conditions of the solder joint, easily leading to missed defects such as cold solder joints and bridging. Furthermore, its unreasonable color distribution and insufficient brightness can easily produce reflections and shadows when inspecting colored components or large objects, or cause the loss of image details due to insufficient light intensity. At the same time, with the increasing demand for high-precision inspection in emerging fields such as semiconductor packaging, traditional light sources are increasingly unable to meet the diverse requirements for light source angle, spectrum, and light intensity in complex scenarios.

[0004] Therefore, there is an urgent need for a multi-angle light source that can achieve multi-angle, multi-spectral, and adjustable lighting effects through innovative structural and optical design, thereby improving the accuracy of 3D-AOI system in acquiring three-dimensional information of objects and its defect detection capabilities, and meeting the stringent requirements of modern industrial automated inspection. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a multi-angle light source.

[0006] This utility model provides a multi-angle light source, including a housing, a cover, a diffuser plate, a first LED light source, and a second LED light source; the inner surface of the housing is provided with an inwardly protruding flange; the cover is disposed on the upper end of the housing, and the inner surface of the cover is provided with a diffusion film; the diffuser plate is connected to the lower end of the housing, and the diffusion film is disposed opposite to the diffuser plate; the first LED light source is connected to the upper surface of the flange, the emitting surface of the first LED light source is opposite to the diffuser film, and the diffuser film is used to homogenize the first LED light source and emit a first angle light source through the diffuser plate; the second LED light source is connected to the inner surface of the housing, the emitting surface of the second LED light source is opposite to the diffuser plate, and the diffuser plate is used to process the second LED light source and emit a second angle light source.

[0007] Optionally, the diffusion film includes a first diffusion film and a second diffusion film. The first diffusion film is disposed on the top inner surface of the housing, and the second diffusion film is disposed on the side wall inner surface of the housing. A first light source forming cavity is formed between the first diffusion film, the second diffusion film, the upper surface of the flange, and the diffuser plate.

[0008] Optionally, the multi-angle light source further includes reflective paper, which is disposed on the lower surface of the flange, and the second LED light source is disposed on the inner surface of the housing. A second light source forming cavity is formed between the inner surface of the housing, the reflective paper, and the diffuser plate.

[0009] Optionally, the flange is located at the upper end of the inner surface of the housing, and the second LED light source is attached below the flange and fully covers the inner surface of the housing.

[0010] Optionally, the outer surface of the housing is provided with heat dissipation grooves.

[0011] Optionally, the diffuser plate includes a connecting portion and a diffuse reflection portion, the connecting portion being connected to the bottom surface of the housing, and the diffuse reflection portion being close to the inside of the housing in an inwardly concave arc shape.

[0012] Optionally, the housing is provided with a large through hole for the lens to pass through, and the diffuser plate is provided with a diffuser plate through hole that matches the position of the large through hole.

[0013] Optionally, the flange and the housing are integrally formed, and the first LED light source is connected to the groove of the flange.

[0014] Optionally, the housing is an annular housing, the cover is an annular cover, the diffuser plate is an inwardly recessed bowl-shaped circular plate, and the annular housing and the annular cover are connected by threads.

[0015] Optionally, the first LED light source is a ring light source, which is installed in a groove on the upper surface of the annular flange, and the second LED light source is a strip light source, which is arranged around the inner surface of the annular housing.

[0016] The beneficial effects of this plan are as follows:

[0017] This multi-angle light source solution has a two-layer structure. The lower layer provides low-angle illumination by energizing a second LED light source, which then diffuses the light through a diffuser plate to form the second angle light source. The upper layer provides high-angle illumination by energizing a first LED light source, which first passes through a diffuser film and then through a diffuser plate for further homogenization, achieving a 30°-80° high-angle illumination. The combination of the lower low-angle illumination and the upper high-angle illumination results in a 10°-80° multi-angle illumination light source, enabling multi-angle illumination and fully illuminating the object under test to meet testing requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first angle structure of the multi-angle light source in this scheme;

[0019] Figure 2 This is a schematic diagram of the second angle structure of the multi-angle light source in this scheme;

[0020] Figure 3 This is a cross-sectional view of the multi-angle light source in this scheme;

[0021] Figure 4 for Figure 3 A magnified view of a portion of circle A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Housing; 11. Flange; 12. Heat dissipation groove; 101. First light source forming cavity; 102. Second light source forming cavity; 20. Sheet; 21. Large through hole; 30. Diffuser plate; 31. Connecting part; 32. Diffuse reflection part; 33. Through hole of diffuse reflection plate; 40. First LED light source; 50. Second LED light source; 60. Diffuse film; 61. First diffuse film; 62. Second diffuse film; 70. Reflective paper. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. For those skilled in the art, the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0026] See Figure 1-4 This embodiment discloses a multi-angle light source, including a housing 10, a cover 20, a diffuser plate 30, a first LED light source 40, and a second LED light source 50. The inner surface of the housing 10 is provided with an inwardly protruding flange 11. The cover 20 is placed on the upper end of the housing 10, and the inner surface of the cover 20 is provided with a diffusion film 60. The diffuser plate 30 is connected to the lower end of the housing 10, and the diffusion film 60 is disposed opposite to the diffuser plate 30. The first LED light source 40 is connected to the upper surface of the flange 11, and the emitting surface of the first LED light source 40 is opposite to the diffuser film 60. The diffuser film 60 is used to homogenize the first LED light source 40 and emit a first angle light source through the diffuser plate 30. The second LED light source 50 is connected to the inner surface of the housing 10, and the emitting surface of the second LED light source 50 is disposed opposite to the diffuser plate 30. The diffuser plate 30 is used to process the second LED light source 50 and emit a second angle light source.

[0027] Compared to existing technologies, this solution features a two-layer structure for its multi-angle light source. The lower layer provides low-angle illumination, where the light from the second LED light source is diffused through a diffuser plate 30 to form the second angle light source. The upper layer provides high-angle illumination, where the light from the first LED light source is diffused through a diffuser film 60 and then through the diffuser plate 30 for further homogenization, resulting in a 30°-80° high-angle illumination first angle light source. By combining the lower low-angle illumination and the upper high-angle illumination, a multi-angle illumination source ranging from 10° to 80° is achieved, providing comprehensive illumination of the object under test and meeting testing requirements.

[0028] In this embodiment, the diffusion film 60 includes a first diffusion film 61 and a second diffusion film 62. The first diffusion film 61 is disposed on the top inner surface of the housing 20, and the second diffusion film 62 is disposed on the inner surface of the side wall of the housing 20. The first diffusion film 61, the second diffusion film 62, the upper surface of the flange 11, and the diffuser plate 30 form a first light source forming cavity 101. The first diffusion film 61 and the second diffusion film 62 are respectively disposed on the inner ring surface and the top surface of the annular housing 20 to homogenize the light emitted by the first LED light source 40, reduce the directional difference of the light, and improve the illumination effect.

[0029] In this embodiment, the multi-angle light source also includes reflective paper 70, which is disposed on the lower surface of the flange 11. The second LED light source 50 is disposed on the inner surface of the housing 10. A second light source forming cavity 102 is formed between the inner surface of the housing 10, the reflective paper 70, and the diffuser plate 30. When illuminated at close range, the reflective paper 70 reflects the light to the area to be detected, improving the utilization rate of the light source and enhancing the lighting effect.

[0030] In this embodiment, the flange 11 is located at the upper end of the inner surface of the housing 10, and the second LED light source 50 is attached below the flange 11 and fully covers the inner surface of the housing 10.

[0031] In this embodiment, the outer surface of the housing 10 is provided with heat dissipation grooves 12. The housing 10, as the main frame of the light source, is made of aluminum alloy. Its outer ring surface is provided with heat dissipation grooves 12. By utilizing the good thermal conductivity of aluminum alloy and the structure of the heat dissipation grooves 12, air convection heat dissipation is enhanced, ensuring stable operation of the light source.

[0032] In this embodiment, the diffuser plate 30 includes a connecting part 31 and a diffuse reflection part 32. The connecting part 31 is connected to the bottom surface of the housing 10, and the diffuse reflection part 32 is close to the inside of the housing 20 with an inwardly concave arc shape.

[0033] In this embodiment, the housing 20 has a large through-hole 21 for the lens to pass through, and the diffuser plate 30 has a diffuse reflection plate through-hole 33 that matches the position of the large through-hole 21. The large through-hole 21 is located at the center of the annular housing 20 for the lens to pass through, and threaded mounting holes are provided around the large through-hole 21 for fixing the light source to the detection equipment. The through-holes in the diffuser plate 30 enable uniform light diffusion, initially optimizing the light distribution.

[0034] In this embodiment, the flange 11 and the housing 10 are integrally formed, and the first LED light source 40 is connected to the groove of the flange 11.

[0035] In this embodiment, the housing 10 is an annular housing 10, the cover 20 is an annular cover 20, the diffuser plate 30 is an inwardly recessed bowl-shaped circular plate, and the annular housing 10 and the annular cover 20 are connected by threads.

[0036] In this embodiment, the first LED light source 40 is a ring light source, which is installed in the groove on the upper surface of the annular flange 11. The second LED light source 50 is a strip light source, which is arranged around the inner surface of the annular housing 10. Both serve as light sources, emitting light from different positions and angles to achieve multi-angle illumination.

[0037] Component Connections and Spatial Relationships: The annular housing 20 is tightly connected to the annular housing 10 via threads. One end of the diffuser plate 30 contacts the recessed surface of the lower end face of the annular housing 10, forming a stable mounting structure. The annular LED light source is located in the groove of the annular flange 11, and the strip LED light source is located on the inner annular surface of the annular housing 10. The first diffuser film 61 and the second diffuser film 62 are respectively installed on the inner annular surface and the top surface of the annular housing 20. The reflective paper 70 is attached to the lower end face of the annular flange 11. All components are closely fitted in space to jointly form a multi-angle annular light source.

[0038] The beneficial effects of this plan are:

[0039] 1. Multi-angle illumination function: Through a unique structural design, the same light source can illuminate from multiple angles at different heights, solving the problem of single illumination angle in existing technologies;

[0040] 2. Improve light source utilization: When illuminating at close range, the light is reflected by the reflective paper 70, allowing the light source to play an effective role;

[0041] 3. Simplified equipment configuration: It eliminates the need for multiple light source devices at different angles, reducing the cost and complexity of the detection equipment;

[0042] 4. Improved detection results: Multi-angle illumination can capture the surface features of the object being tested more comprehensively and reduce blind spots.

[0043] The multi-angle light source of this solution can be applied to the following fields:

[0044] 1. Industrial inspection: Used for detecting surface defects and measuring dimensions of products;

[0045] 2. Machine vision: Provides multi-angle illumination for machine vision systems to improve image acquisition quality;

[0046] 3. Automated testing equipment: Applied to the testing stage of automated production lines.

[0047] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A multi-angle light source, characterized in that, include: A housing, wherein the inner surface of the housing is provided with an inwardly protruding flange; A housing, which covers the upper end of the housing, and the inner surface of the housing is provided with a diffusion film; A diffuser plate is connected to the lower end of the housing, and the diffusion film is disposed opposite to the diffuser plate; A first LED light source is connected to the upper surface of the flange, and the emitting surface of the first LED light source is opposite to the diffusion film. The diffusion film is used to homogenize the first LED light source and emit a first angle light source through the diffuser plate. The second LED light source is connected to the inner surface of the housing. The emitting surface of the second LED light source is disposed opposite to the diffuser plate, which is used to process the second LED light source and emit a second angle light source.

2. The multi-angle light source according to claim 1, characterized in that, The diffusion film includes a first diffusion film and a second diffusion film. The first diffusion film is disposed on the top inner surface of the housing, and the second diffusion film is disposed on the side wall inner surface of the housing. A first light source forming cavity is formed between the first diffusion film, the second diffusion film, the upper surface of the flange, and the diffuser plate.

3. The multi-angle light source according to claim 1, characterized in that, The multi-angle light source also includes reflective paper, which is disposed on the lower surface of the flange. The second LED light source is disposed on the inner surface of the housing. A second light source forming cavity is formed between the inner surface of the housing, the reflective paper, and the diffuser plate.

4. The multi-angle light source according to claim 1, characterized in that, The flange is located at the upper end of the inner surface of the housing, and the second LED light source is attached below the flange and completely covers the inner surface of the housing.

5. The multi-angle light source according to claim 1, characterized in that, The outer surface of the housing is provided with heat dissipation grooves.

6. The multi-angle light source according to claim 1, characterized in that, The diffuser plate includes a connecting part and a diffuse reflection part. The connecting part is connected to the bottom surface of the housing, and the diffuse reflection part is close to the inside of the housing in an inwardly concave arc shape.

7. The multi-angle light source according to claim 1, characterized in that, The housing has a large through hole for the lens to pass through, and the diffuser plate has a diffuser plate through hole that matches the position of the large through hole.

8. The multi-angle light source according to claim 1, characterized in that, The flange and the housing are integrally formed, and the first LED light source is connected to the groove of the flange.

9. The multi-angle light source according to claim 1, characterized in that, The housing is an annular housing, the cover is an annular cover, the diffuser plate is an inwardly concave bowl-shaped circular plate, and the annular housing and the annular cover are connected by threads.

10. The multi-angle light source according to claim 9, characterized in that, The first LED light source is a ring light source, which is installed in the groove on the upper surface of the annular flange. The second LED light source is a strip light source, which is arranged around the inner surface of the annular shell.

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