A combined light source device
By integrating two mutually perpendicular coaxial light sources within the same light source device, the problem of difficulty in switching light color and light intensity in existing technologies is solved, enabling diversified applications and size optimization of the light source device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- OPT VISION TECH (SUZHOU) CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-31
AI Technical Summary
Existing coaxial light source devices can only use one structure, which cannot meet the user's need to quickly switch between different light colors or light intensities, and also have the problems of large structural volume or difficulty in applying them to the detection of highly reflective objects.
A combined light source device was designed, integrating two coaxial light sources that can be used independently. The light from one light source is perpendicular to the light from the other light source, and they share a beam splitter. They can be used individually or in combination to meet the needs of different light colors and light intensities.
It enables rapid switching between different light colors and light intensities within the same light source device, meeting diverse detection needs of users while reducing the device's size footprint.
Smart Images
Figure CN224580182U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of light source devices, and in particular to a combined light source device. Background Technology
[0002] Currently, visual inspection of reflective objects largely requires the use of coaxial light sources. Coaxial light sources emit light along the same axis as the camera, effectively reducing reflections from object surfaces (such as metal and glass), thereby improving image contrast and detection accuracy. There are two main types of existing coaxial light sources. The first type is a combination of a side-emitting coaxial light plate and a beam splitter. The beam splitter is positioned along the light path of the coaxial light plate at a 45° angle. The light emitted by the coaxial light plate is directly or reflected onto the object through the beam splitter, illuminating the object. The camera then captures the image of the object through the beam splitter. The second type is also a combination of a side-emitting coaxial light plate and a light guide plate. This second type is also called a coaxial surface light source or planar coaxial light source. The coaxial light plate is positioned on the outside of the light guide plate, which has densely packed holes. The light emitted from the coaxial light source on one side is refracted at a 90° angle through the hole walls. The refracted light then travels parallel to the camera, allowing the camera to capture the image of the object through the light guide plate. Specifically, the first type of coaxial light source can be used in the detection of highly reflective objects, but it suffers from a large structural volume due to the use of a 45° tilted beam splitter. The second type of coaxial light source is thinner, thus not occupying much space, but it is difficult to apply to the detection of highly reflective objects. Furthermore, different colors of coaxial light sources can significantly affect the visual detection of objects; some defects are more prominent under red coaxial light, while others are more prominent under blue coaxial light. Existing coaxial light source devices only employ one of these two structures, failing to meet users' needs for quickly switching between different colors or intensities of coaxial light during detection.
[0003] Therefore, existing coaxial light source devices need to be improved.
[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content
[0005] This utility model provides a combined light source device, which mainly solves the technical problem of how to integrate two independently usable coaxial light sources in one light source device.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A combined light source device includes a housing, a first coaxial light source, a second coaxial light source, and a beam splitter. The housing has a mounting cavity, and the beam splitter is fixed within the mounting cavity. A central hole communicating with the mounting cavity is provided on the outer wall of the housing. The first coaxial light source is a translucent planar coaxial light source located at the central hole. The second coaxial light source is located on one side of the mounting cavity, and a first coaxial ray emitted by the first coaxial light source and a second coaxial ray emitted by the second coaxial light source are perpendicular to each other. An opening communicating with the mounting cavity is provided at one end of the housing opposite to either the first or second coaxial light source. The beam splitter forms a 45° angle with both the first and second coaxial ray rays.
[0008] In one of the technical solutions, the housing has an opening at the end opposite to the second coaxial light source, and a light-absorbing plate is provided on the inner wall of the housing at the end opposite to the first coaxial light source.
[0009] In one of the technical solutions, the combined light source device further includes a backlight source, which is disposed on one side of the central hole and emits light toward the beam splitter.
[0010] In one of the technical solutions, a protruding post is provided on the inner wall of the housing towards the mounting cavity, and the central hole is provided in the protruding post. The backlight is disposed on the outside of the protruding post so that the protruding post separates the backlight and the first coaxial light source.
[0011] In one of the technical solutions, the backlight is arranged in a ring around the outer periphery of the protruding post, and an annular diffuser plate is provided between the backlight and the beam splitter, with the inner ring of the annular diffuser plate fixed to the protruding post.
[0012] In one of the technical solutions, a coaxial light diffuser is provided between the second coaxial light source and the beam splitter.
[0013] In one of the technical solutions, the housing has a plurality of protruding heat dissipation parts on the outer wall corresponding to the second coaxial light source.
[0014] In one of the technical solutions, the first coaxial light source includes a coaxial light lamp plate and a light guide plate. The coaxial light lamp plate is disposed on one side of the light guide plate. The light guide plate is transparent and refracts the light emitted by the coaxial light lamp plate at a 90° angle toward the beam splitter. The light guide plate and the beam splitter form a 45° angle.
[0015] Compared with the prior art, the combined light source device provided by this utility model has at least the following beneficial effects:
[0016] This solution incorporates two coaxial light sources. The first coaxial light source corresponds to the second coaxial light source described in the background section, and the second coaxial light source corresponds to the first coaxial light source described in the background section. This solution designs the first coaxial light emitted by the first coaxial light source and the second coaxial light emitted by the second coaxial light source to be perpendicular to each other. This allows the first and second coaxial light sources to share the same beam splitter and to illuminate the object being inspected outside the opening, either individually or in combination. During operation, the camera is simply placed outside the central aperture, and the image of the object being inspected is refracted by the beam splitter and captured by the camera. This solution integrates two independently usable coaxial light sources, allowing users to apply at least one of the two coaxial light sources. This satisfies the user's need to quickly switch between different colors or intensities of coaxial light during inspection. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of a combined light source device provided in an embodiment of this application;
[0019] Figure 2 This is a schematic diagram of a combined light source device provided in an embodiment of this application when working in conjunction with a camera and a detected object.
[0020] Figure label:
[0021] 1. Outer shell; 11. Mounting cavity; 12. Central hole; 13. Opening; 14. Protrusion; 15. Heat dissipation part; 2. First coaxial light source; 21. Coaxial light plate; 22. Light guide plate; 3. Second coaxial light source; 4. Beam splitter; 5. Object to be detected; 6. Camera; 7. Light absorbing plate; 8. Backlight; 9. Annular diffuser plate; 10. Coaxial light diffuser plate. Detailed Implementation
[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0024] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "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 application and simplifying the description, and are not intended to 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 application.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0026] 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.
[0027] Please refer to the following: Figure 1 and Figure 2This utility model provides a combined light source device, mainly including a housing 1, a first coaxial light source 2, a second coaxial light source 3, and a beam splitter 4. The housing 1 has a mounting cavity 11, and the beam splitter 4 is fixed inside the mounting cavity 11. The outer wall of the housing 1 has a central hole 12 and an opening 13, both of which connect to the interior of the mounting cavity 11. The first coaxial light source 2 is located at the central hole 12 and is transparent. The first coaxial light source 2 is a planar coaxial light source (i.e., the second type of coaxial light source described in the background art). The second coaxial light source 3 is located on one side of the mounting cavity 11. The housing 1 has multiple protruding heat dissipation parts 15 on the outer wall corresponding to the second coaxial light source 3 to improve the heat dissipation of the light source device. Regarding performance, the second coaxial light source 3 is the first type of coaxial light source described in the background art. Moreover, the first coaxial light emitted by the first coaxial light source 2 and the second coaxial light emitted by the second coaxial light source 3 are perpendicular to each other. The beam splitter 4 forms a 45° angle with the first coaxial light and the second coaxial light respectively. The beam splitter 4 is prior art. The beam splitter 4 has the characteristics of being semi-transparent and semi-reflective. That is, the beam splitter 4 has both the characteristics of transmitting light and reflecting light. When light passes through the beam splitter 4, part of the light will pass directly through the beam splitter 4 and be emitted outward, while another part of the light will be emitted by the beam splitter 4. The housing 1 is provided with the above-mentioned opening 13 at one end opposite to the second coaxial light source 3. One side of the opening 13 is used to place the object to be detected 5.
[0028] Specifically, with Figure 1 or Figure 2 Taking the structure shown as an example, the first coaxial light source 2 is preferably located at the top of the housing 1, and the second coaxial light source 3 is preferably located at the left side of the housing 1. The direction of the first coaxial light emitted by the first coaxial light source 2 is downward, and the direction of the second coaxial light emitted by the second coaxial light source 3 is to the right. Before use, the object to be detected 5 is placed on the right side of the housing 1 and adjacent to the opening 13. At the same time, the camera 6 is placed on top of the central hole 12. The camera 6 can observe the object to be detected 5 through the first coaxial light source 2. In use, the first coaxial light source 2 and the second coaxial light source 3 can be used independently or in combination. Utilizing the reflective characteristics of the beam splitter 4, the first coaxial light emitted by the first coaxial light source 2 can be reflected onto the surface of the object to be detected 5 located on the right side of the housing 1 to illuminate the object to be detected 5. The image of the object to be detected 5 is captured by the camera 6 after being reflected by the beam splitter 4. Utilizing the direct illumination characteristic of the beam splitter 4, the second coaxial light emitted by the second coaxial light source 3 can directly pass through the surface of the object to be detected 5 located on the right side of the housing 1 to illuminate the object to be detected 5. The image of the object to be detected 5 can also be captured by the camera 6 after being reflected by the beam splitter 4.
[0029] In other embodiments, the object to be detected 5 can also be placed at the bottom of the housing 1, in which case the housing 1 is positioned at the end opposite to the first coaxial light source 2 (with...). Figure 1 For example, the opening 13 is provided at the bottom of the outer shell 1. At this time, the first coaxial light source 2 uses the light transmission characteristics of the beam splitter 4 to illuminate the object 5 being tested, and the second coaxial light source 3 uses the reflection characteristics of the beam splitter 4 to illuminate the object 5 being tested.
[0030] Specifically, this solution sets up two coaxial light sources. The first coaxial light source 2 is equivalent to the second coaxial light source described in the background technology, and the second coaxial light source 3 is equivalent to the first coaxial light source described in the background technology. This solution designs the first coaxial light emitted by the first coaxial light source 2 and the second coaxial light emitted by the second coaxial light source 3 to be perpendicular to each other, so that the first coaxial light source 2 and the second coaxial light source 3 can share the same beam splitter 4 and can illuminate the object 5 to be detected outside the opening 13 individually or in combination. During operation, the camera 6 only needs to be placed outside the central hole 12, and the image of the object 5 to be detected can be captured by the camera 6 after refraction through the beam splitter 4. This solution integrates two coaxial light sources that can be used independently, so that users can use at least one of the two coaxial light sources, thereby meeting the user's need to quickly switch between different colors or different light intensities of coaxial light during detection.
[0031] Please see Figure 1 or Figure 2 The first coaxial light source 2 specifically includes a coaxial light plate 21 and a light guide plate 22. The coaxial light plate 21 is disposed on one side of the light guide plate 22. The light guide plate 22 is transparent, so that the image of the object being detected 5 can pass through the light guide plate 22 and be acquired by the camera 6. The light guide plate 22 has multiple sealed micro-holes. Through the reflection of the arc-shaped hole walls of the micro-holes, the light emitted by the coaxial light plate 21 can be refracted at a 90° angle towards the beam splitter 4. The light guide plate 22 and the beam splitter 4 form a 45° angle, so that the light emitted by the coaxial light plate 21 can be coaxial with the camera 6 after being refracted by the light guide plate 22.
[0032] Please see Figure 1 or Figure 2 Based on the structural design of the housing 1 having an opening 13 at the end opposite to the second coaxial light source 3, a light-absorbing plate 7 is provided on the inner wall of the housing 1 at the end opposite to the first coaxial light source 2. The light-absorbing plate 7 can absorb the light that is directly shone downward from the first coaxial light source 2 after passing through the beam splitter 4, and prevent the light from being irregularly reflected on the bottom wall inside the housing 1, so as to prevent non-coaxial light from hitting the object being detected 5.
[0033] Please refer to it again. Figure 1 or Figure 2The combined light source device in this embodiment also includes a backlight 8, which is disposed on one side of the central hole 12 and emits light downward toward the beam splitter 4. The backlight 8 can be used independently to meet the lighting requirements of the object 5 to be tested, which has a non-reflective surface. Preferably, the inner wall of the housing 1 has a protruding post 14 protruding toward the mounting cavity 11, and the aforementioned central hole 12 is disposed inside the protruding post 14. The backlight 8 is disposed on the outside of the protruding post 14 so that the protruding post 14 separates the backlight 8 and the first coaxial light source 2. With this design, when the backlight 8 and the first coaxial light source 2 are used in combination, the corner parts of the surface edge of the object 5 to be tested can be detected. More preferably, the backlight 8 is arranged in a ring around the outer periphery of the protrusion 14. The ring-shaped backlight 8 can provide omnidirectional illumination for the corner of the object 5 being inspected. The first coaxial light source 2 located in the middle of the backlight 8 can eliminate the dark light in the area of the central hole 12, thereby improving the accuracy of defect detection at the corner. An annular diffuser plate 9 is provided between the backlight 8 and the beam splitter 4. The inner ring of the annular diffuser plate 9 is fixed on the protrusion 14. In addition, a coaxial light diffuser plate 10 is provided between the second coaxial light source 3 and the beam splitter 4.
[0034] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.
Claims
1. A combined light source arrangement, characterized by The device includes a housing, a first coaxial light source, a second coaxial light source, and a beam splitter. The housing has a mounting cavity, and the beam splitter is fixed within the mounting cavity. A central hole communicating with the mounting cavity is provided on the outer wall of the housing. The first coaxial light source is disposed at the central hole and is a translucent planar coaxial light source. The second coaxial light source is disposed on one side of the mounting cavity, and the first coaxial ray emitted by the first coaxial light source and the second coaxial ray emitted by the second coaxial light source are perpendicular to each other. An opening communicating with the mounting cavity is provided at one end of the housing opposite to either the first or second coaxial light source. The beam splitter forms a 45° angle with both the first and second coaxial ray rays.
2. The combined light source apparatus according to claim 1, wherein The housing has an opening at one end opposite to the second coaxial light source, and a light-absorbing plate is provided on the inner wall of the housing at the end opposite to the first coaxial light source.
3. The combined light source apparatus according to claim 1, wherein The combined light source device also includes a backlight source, which is disposed on one side of the central hole and emits light toward the beam splitter.
4. The combined light source apparatus according to claim 3, wherein The inner wall of the housing is provided with a protruding post protruding towards the mounting cavity. The protruding post is provided with the central hole. The backlight is disposed on the outside of the protruding post so that the protruding post separates the backlight and the first coaxial light source.
5. The combined light source apparatus according to claim 4, wherein The backlight is arranged in a ring around the outer periphery of the protruding post, and an annular diffuser plate is provided between the backlight and the beam splitter. The inner ring of the annular diffuser plate is fixed to the protruding post.
6. The combined light source apparatus according to claim 1, wherein A coaxial light diffuser is disposed between the second coaxial light source and the beam splitter.
7. The combined light source apparatus according to claim 1, wherein The outer casing has multiple protruding heat dissipation parts on the outer wall corresponding to the second coaxial light source.
8. The combined light source apparatus according to claim 1, wherein The first coaxial light source includes a coaxial light lamp plate and a light guide plate. The coaxial light lamp plate is disposed on one side of the light guide plate. The light guide plate is transparent and refracts the light emitted by the coaxial light lamp plate at a 90° angle toward the beam splitter. The light guide plate and the beam splitter form a 45° angle.