A light source module with uniform illumination

Abstract

This utility model discloses a light source module for uniform illumination, comprising: a circuit board, multiple sets of large-angle annular lens light groups, and multiple sets of small-angle annular lens light groups. A light-transmitting hole is provided at the center of the circuit board. The multiple sets of large-angle annular lens light groups are disposed on the circuit board, spaced apart from the inside to the outside along the periphery of the light-transmitting hole, with the central axis of the light-transmitting hole coinciding with the central axis of the multiple sets of large-angle annular lens light groups. Similarly, the multiple sets of small-angle annular lens light groups are disposed on the circuit board, spaced apart from the inside to the outside along the periphery of the light-transmitting hole, with the central axis of the light-transmitting hole coinciding with the central axis of the multiple sets of small-angle annular lens light groups. Each set of large-angle annular lens light groups is located between two adjacent small-angle annular lens light groups. This arrangement reduces the superposition of illuminance in mixed areas, thereby achieving uniform overall illumination distribution and improving the clarity and consistency of image acquisition.

Description

Technical Field

[0001] This utility model relates to the field of light source illumination, and in particular to a light source module with uniform illumination. Background Technology

[0002] In the fields of machine vision, industrial inspection and automated image acquisition, the light source module is a key component to ensure the quality of image acquisition. Uniform lighting can avoid image distortion caused by shadows, overexposure or uneven illumination, thereby improving detection accuracy and reliability.

[0003] However, when a camera needs to be integrated into the light source module, a light-transmitting hole is usually required in the center of the circuit board so that the camera can extend into it and capture an image of the object to be inspected below. This design prevents the placement of LED chips in the light-transmitting hole area, resulting in significantly lower illumination at the center of the illuminated surface compared to the surrounding areas, creating uneven illumination distribution. This unevenness severely affects image clarity and consistency, especially in high-precision inspection applications such as electronic component inspection and surface defect identification, where a highly uniform lighting environment is required.

[0004] In existing technologies, methods such as adding auxiliary light sources, adjusting the density of LED beads, or using diffuser materials are often used to solve the problem of insufficient center illumination. However, these methods have limitations. For example, increasing the number or power of light sources may exacerbate excessive edge illumination, leading to increased light contrast. Using diffuser materials may reduce overall brightness or introduce scattering loss, failing to fundamentally solve the problem of illuminance balance between the center and the edge. Therefore, improvements are urgently needed. Utility Model Content

[0005] The main purpose of this invention is to propose a light source module with uniform illumination, thereby solving the problem of uneven illumination caused by opening a hole in the center of the light source module in related technologies.

[0006] To achieve the above objectives, this utility model proposes a light source module with uniform illumination, the light source module with uniform illumination comprising: A circuit board, wherein a light-transmitting hole is provided in the center of the circuit board; Multiple sets of annular large-angle lens lamp groups are disposed on the circuit board. The multiple sets of annular large-angle lens lamp groups are arranged at intervals from the inside to the outside along the periphery of the light-transmitting hole. The central axis of the light-transmitting hole coincides with the central axis of the multiple sets of annular large-angle lens lamp groups. Multiple sets of annular small-angle lens lamp groups are disposed on the circuit board. The multiple sets of annular small-angle lens lamp groups are arranged at intervals from the inside to the outside along the periphery of the light-transmitting hole. The central axis of the light-transmitting hole coincides with the central axis of the multiple sets of annular small-angle lens lamp groups. Each set of annular large-angle lens lamp groups is located between two adjacent annular small-angle lens lamp groups.

[0007] In some embodiments, the lamp assembly adjacent to the light-transmitting hole is the annular large-angle lens lamp assembly.

[0008] In some embodiments, the second group of lamps adjacent to the light-transmitting hole is an alternating ring lamp group, which is formed by alternating and surrounding multiple large-angle lens lamps and multiple small-angle lens lamps.

[0009] In some embodiments, the lamp group adjacent to the edge of the circuit board is the annular small-angle lens lamp group.

[0010] In some embodiments, the annular large-angle lens lamp group is composed of multiple large-angle lens lamp beads arranged in a ring, and the annular small-angle lens lamp group is composed of multiple small-angle lens lamp beads arranged in a ring.

[0011] In some embodiments, the light-transmitting hole is circular in shape, and the annular large lens lamp group adjacent to the light-transmitting hole is composed of four large-angle lens lamp beads arranged in a ring around it. The four large-angle lens lamp beads are located at intervals on the periphery of the light-transmitting hole.

[0012] In some embodiments, the lens of the large-angle lens lamp bead is a 60-degree lens, and the lens of the small-angle lens lamp bead is a 30-degree lens.

[0013] In some embodiments, both the multiple sets of large-angle annular lens light groups and the multiple sets of small-angle annular lens light groups are arranged in a square annular shape.

[0014] The beneficial effects of this utility model's technical solution are as follows: This utility model's uniformly illuminated light source module features a light-transmitting hole on a circuit board, with multiple sets of large-angle ring-shaped lens lamp groups and multiple sets of small-angle ring-shaped lens lamp groups arranged alternately from the inside out around the light-transmitting hole. This allows the wide beam of the large-angle lens to effectively illuminate the central area, increasing the central illuminance. Furthermore, the alternating arrangement reduces the superposition of illuminance in mixed areas, thereby achieving a uniform overall illumination distribution and improving the clarity and consistency of image acquisition. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure and installation of a uniformly illuminated light source module according to an embodiment of the present invention. Figure 2 This is a top view of a uniformly illuminated light source module according to an embodiment of the present invention. Figure 3 for Figure 2 A magnified view of part A in the middle.

[0016] Explanation of icon numbers: 100. Circuit board; 110. Light-transmitting hole; 200. Ring-shaped large-angle lens lamp assembly; 210. Large-angle lens lamp bead; 300. Ring-shaped small-angle lens lamp assembly; 310. Small-angle lens lamp bead. Detailed Implementation

[0017] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. In addition, the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0018] To address the technical deficiencies in related technologies, this utility model provides a light source module with uniform illumination. Please refer to [link / reference]. Figures 1 to 3 The uniformly illuminated light source module includes: a circuit board 100, multiple sets of annular large-angle lens lamp groups 200 and multiple sets of annular small-angle lens lamp groups 300. The circuit board 100 has a light-transmitting hole 110 at its center. The light-transmitting hole 110 can be square, circular, or other shapes. Specifically, the shape of the light-transmitting hole 110 can be adapted to the shape of the camera module used together with the light source module of this utility model.

[0019] Multiple sets of annular large-angle lens lamp groups 200 are disposed on the circuit board 100. The multiple sets of annular large-angle lens lamp groups 200 are arranged at intervals from the inside to the outside along the periphery of the light-transmitting hole 110. Each annular large-angle lens lamp group 200 is composed of multiple large-angle lens lamp beads 210 arranged around it. Furthermore, the central axis of the light-transmitting hole 110 coincides with the central axis of the multiple sets of annular large-angle lens lamp groups 200. That is, the multiple sets of annular large-angle lens lamp groups 200 surround the light-transmitting hole 110 from the inside to the outside and are arranged at intervals.

[0020] Similarly, multiple sets of annular small-angle lens lamp groups 300 are disposed on the circuit board 100. These groups are spaced apart from the inside out along the periphery of the light-transmitting hole 110, with the central axis of the light-transmitting hole 110 coinciding with the central axis of each group. Each annular small-angle lens lamp group 300 is composed of multiple small-angle lens LEDs 310 arranged in a ring around the light-transmitting hole 110, forming a series of rings spaced apart from the inside out. Each annular large-angle lens lamp group 200 is located between two adjacent annular small-angle lens lamp groups 300. This arrangement ensures that the multiple annular large-angle lens lamp groups 200 and the multiple annular small-angle lens lamp groups 300 are arranged alternately from the inside out.

[0021] It should be noted that the lens angle setting of the large-angle lens LED 210 is larger than that of the small-angle lens LED 310. For example, the lens angle of the large-angle lens LED 210 can be 60°, 70°, or 80°, while the lens angle of the small-angle lens LED 310 can be 30°, 40°, or 50°, etc. The lens angle settings of the large-angle lens LED 210 and the small-angle lens LED 310 can be set according to specific working conditions and are not limited here.

[0022] Through the above technical solution, the light source module with uniform illumination of this utility model sets a light-transmitting hole 110 on the circuit board 100, and sets multiple sets of annular large-angle lens lamp groups 200 and multiple sets of annular small-angle lens lamp groups 300 are arranged alternately from the inside to the outside around the light-transmitting hole 110. This allows the wide beam of the large-angle lens to effectively illuminate the central area, improve the central illuminance, and the alternating arrangement can reduce the superposition of illuminance in the mixed area, thereby achieving uniform overall illumination and improving the clarity and consistency of image acquisition.

[0023] Since the area inside the light-transmitting hole 110 is not covered by LEDs, to avoid insufficient illumination in this area leading to inadequate image clarity, in this embodiment, the lamp assembly adjacent to the light-transmitting hole 110 is a ring-shaped large-angle lens lamp assembly 200. This configuration, using a ring-shaped large-angle lens lamp assembly 200 adjacent to the light-transmitting hole 110, allows for direct illumination compensation for the area with the lowest central illuminance. Utilizing the wide-angle characteristic of the large-angle lens, light is extended to the central light-deficient area, significantly improving the problem of central darkness and enhancing illumination uniformity.

[0024] Furthermore, the second group of lights adjacent to the light-transmitting hole 110 is an alternating ring light group, which is formed by alternating arrangement of multiple large-angle lens LEDs 210 and multiple small-angle lens LEDs 310. This alternating ring light group, with its alternating arrangement of large-angle lens LEDs 210 and small-angle lens LEDs 310, creates a smooth illuminance transition zone around the central area, avoiding jumps in illuminance caused by abrupt changes in light group type, further refining uniformity and enhancing the natural gradation effect of the light.

[0025] In some embodiments, in order to ensure that the outer contour edge of the object under test can be clearly imaged, the lamp group adjacent to the edge of the circuit board 100 is a ring-shaped small-angle lens lamp group 300. By defining the lamp group adjacent to the edge of the circuit board 100 as a ring-shaped small-angle lens lamp group 300, the focusing characteristics of the small-angle lens can be used to control the light, thereby improving the brightness of the edge of the object under test and improving the image clarity of the outer contour of the object under test.

[0026] In this embodiment, the light-transmitting aperture 110 is circular. The annular large-lens lamp assembly adjacent to the light-transmitting aperture 110 is composed of four large-angle lens lamp beads 210 arranged in a ring around it. The four large-angle lens lamp beads 210 are spaced apart and located around the periphery of the light-transmitting aperture 110. By placing four large-angle lens lamp beads 210 at the four corners of the circular light-transmitting aperture 110, the central illumination can be optimized. The spaced arrangement of the four lamp beads ensures uniform light coverage of the central area. The structure is simple, compact, and has high light efficiency.

[0027] In this embodiment, the large-angle lens lamp 210 has a 60-degree lens, and the small-angle lens lamp 310 has a 30-degree lens. The 60-degree lens provides sufficient central coverage, while the 30-degree lens precisely controls the edge light intensity, making the illuminance distribution more in line with theoretical optimization and enhancing the feasibility of uniformity.

[0028] In some embodiments, the multiple sets of large-angle annular lens lamp groups 200 and the multiple sets of small-angle annular lens lamp groups 300 are all arranged in a square annular shape. The square annular shape of the large-angle annular lens lamp group 200 and the small-angle annular lens lamp group 300 expands the applicability of the light source module, which can be applied to square or rectangular imaging areas, providing layout flexibility, adapting to diverse application scenarios, while maintaining illumination uniformity.

[0029] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A light source module with uniform illumination, characterized in that, The uniformly illuminated light source module includes: A circuit board (100) having a light-transmitting hole (110) at its center; Multiple sets of annular large-angle lens lamp groups (200) are disposed on the circuit board (100). The multiple sets of annular large-angle lens lamp groups (200) are arranged at intervals from the inside to the outside along the periphery of the light-transmitting hole (110). The central axis of the light-transmitting hole (110) coincides with the central axis of the multiple sets of annular large-angle lens lamp groups (200). Multiple sets of annular small-angle lens lamp groups (300) are disposed on the circuit board (100). The multiple sets of annular small-angle lens lamp groups (300) are arranged at intervals from the inside to the outside along the periphery of the light-transmitting hole (110). The central axis of the light-transmitting hole (110) coincides with the central axis of the multiple sets of annular small-angle lens lamp groups (300). Each set of annular large-angle lens lamp groups (200) is located between two adjacent annular small-angle lens lamp groups (300).

2. The uniformly illuminated light source module according to claim 1, characterized in that, The lamp assembly adjacent to the light-transmitting hole (110) is the annular large-angle lens lamp assembly (200).

3. The uniformly illuminated light source module according to claim 2, characterized in that, The second group of lamps adjacent to the light-transmitting hole (110) is an alternating ring lamp group, which is formed by alternating arrangement of multiple large-angle lens lamp beads (210) and multiple small-angle lens lamp groups.

4. The uniformly illuminated light source module according to claim 1, characterized in that, The lamp assembly adjacent to the edge of the circuit board (100) is the annular small-angle lens lamp assembly (300).

5. The uniformly illuminated light source module according to claim 1, characterized in that, The annular large-angle lens lamp group (200) is composed of multiple large-angle lens lamp beads (210) arranged in a ring, and the annular small-angle lens lamp group (300) is composed of multiple small-angle lens lamp beads (310) arranged in a ring.

6. The uniformly illuminated light source module according to claim 5, characterized in that, The light-transmitting hole (110) is circular in shape. The annular large lens lamp group adjacent to the light-transmitting hole (110) is composed of four large-angle lens lamp beads (210) arranged around it. The four large-angle lens lamp beads (210) are located at intervals around the light-transmitting hole (110).

7. The uniformly illuminated light source module according to claim 5, characterized in that, The large-angle lens lamp bead (210) has a 60-degree lens, and the small-angle lens lamp bead (310) has a 30-degree lens.

8. The uniformly illuminated light source module according to claim 2, characterized in that, Both the multiple sets of large-angle annular lens light groups (200) and the multiple sets of small-angle annular lens light groups (300) are arranged in a square annular shape.

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