A multi-group optical coaxial visual lighting device

Abstract

This utility model discloses a multi-group optical coaxial visual lighting device, including at least two groups of light-emitting modules, at least two first condensing lenses, and one second condensing lens. Each of the light-emitting modules has a first condensing lens disposed along its light-emitting path. The first light emitted by each light-emitting module is refracted by the corresponding first condensing lens and then focused and collimated into a second light. The second condensing lens is disposed on the side of the plurality of first condensing lenses facing away from the light-emitting modules, and is disposed along the emission path of all the second light rays so that the second condensing lens can receive all the second light rays. The second condensing lens is used to refract and focus all the second light rays to the same focal point. This application achieves low-power adjustment of light emission brightness and convenient and accurate adjustment of light emission color.

Description

Technical Field

[0001] This utility model relates to the technical field of lighting devices for machine vision, and more particularly to a vision lighting device with multiple sets of coaxial optical systems. Background Technology

[0002] With the development of technology, the demand for machine vision in object detection is increasing. Machine vision requires a lighting device to illuminate the object during detection, ensuring the camera can capture a clear image. Typically, lighting devices have brightness adjustment capabilities, but most change the brightness of the LEDs by altering external resistance, a technique that is energy-intensive. Currently, a small number of lighting devices also have color-adjustment capabilities, primarily achieved through two techniques. The first involves evenly arranging multiple LEDs together. For a single color, the large distance between LEDs of the same color results in poor uniformity of light emission; the more colors available, the worse the uniformity. The second technique involves fixing multiple LED panels on a rotating base. The position of the panels is changed by rotating the base, switching the desired color to the desired position. This method typically suffers from poor rotational accuracy, making it difficult to ensure the panel accurately illuminates the previously desired position after color switching. Furthermore, the rotating base contributes to the larger size of the lighting device. Therefore, existing lighting devices need to be improved. Utility Model Content

[0003] This invention provides a visual lighting device with multiple sets of coaxial optical systems, which mainly solves the technical problem of how to adjust the brightness of the emitted light in a low-power manner and how to adjust the color of the emitted light more conveniently and accurately.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A multi-group optical coaxial vision lighting device is used for illuminating objects detected by machine vision. The vision lighting device includes at least two groups of light-emitting modules, at least two first condenser lenses and one second condenser lens.

[0006] Each of the light-emitting modules has a first condensing lens on its light-emitting path. The first light emitted by each light-emitting module is refracted by the corresponding first condensing lens and then focused and collimated into a second light. The second condensing lens is disposed on the side of the plurality of first condensing lenses facing away from the light-emitting modules, and the second condensing lens is disposed on the emission path of all the second light rays so that the second condensing lens can receive all the second light rays. The second condensing lens is used to refract and focus all the second light rays to the same focal point.

[0007] In one of the technical solutions, the light-emitting surfaces of multiple sets of light-emitting modules all face the same direction, and the multiple sets of light-emitting modules are parallel to each other.

[0008] In one of the technical solutions, the first condensing lens is a circular condensing lens.

[0009] In one technical solution, the side of the second condensing lens facing the plurality of first condensing lenses is concave, the concave surface covering all the circular condensing lenses, and the side of the second condensing lens facing away from the plurality of first condensing lenses is convex, and all the second light rays are refracted sequentially through the concave surface and the convex surface and focused to the same focal point.

[0010] In one of the technical solutions, the light-emitting modules of multiple groups emit the same color.

[0011] In one of the technical solutions, the light-emitting modules of each group emit different colors.

[0012] In one of the technical solutions, the visual lighting device includes three sets of light-emitting modules and three first condensing lenses, with the three first condensing lenses arranged one-to-one on the light-emitting paths of the three light-emitting modules.

[0013] In one of the technical solutions, the visual lighting device further includes a housing, and multiple sets of light-emitting modules, multiple first condensing lenses and second condensing lenses are fixed inside the housing. The housing has a light outlet at the position corresponding to the second condensing lens.

[0014] In one of the technical solutions, the visual lighting device further includes a control module disposed within the housing. The control module is electrically connected to multiple sets of light-emitting modules and is used to control the multiple sets of light-emitting modules to turn on or off respectively.

[0015] Compared with the prior art, the multi-coaxial visual lighting device provided by this utility model has at least the following beneficial effects:

[0016] This solution uses multiple light-emitting modules (which can be understood as multiple LED light panels). In use, the light emitted by these modules is refracted and collimated by their respective first focusing lenses. The collimated light is then refracted by a second focusing lens and converges at the same focal point. This design allows for adjustments to the brightness at the focal point by changing the number of light-emitting modules when the modules emit the same color. Compared to traditional methods that adjust external resistor values, this solution consumes less energy. When the modules emit different colors, the color can be changed by altering the operating state of each module. This method is easier to operate. Furthermore, because the position of the light-emitting modules remains constant during color adjustment, and the emitting area remains focused at the focal point, the emitting area is more accurately aligned, preventing optical axis misalignment and ensuring compatibility with applications requiring adjustable color but extremely high positional precision. 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 vision lighting device with multiple sets of coaxial optical arrays provided in an embodiment of this application.

[0019] Figure label:

[0020] 1. Light-emitting module; 2. First condensing lens; 3. Second condensing lens; 31. Concave surface; 32. Convex surface; 4. First light ray; 5. Second light ray; 6. Housing; 61. Light outlet. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Please see Figure 1This utility model embodiment provides a multi-group optical coaxial visual lighting device for illuminating objects requiring machine vision inspection. This visual lighting device mainly includes at least two groups of light-emitting modules 1, at least two first condensing lenses 2, and one second condensing lens 3. Each light-emitting module 1 has a first condensing lens 2 along its light-emitting path. Preferably, this embodiment includes three groups of light-emitting modules 1, and correspondingly, each of the three groups of light-emitting modules 1 has a first condensing lens 2 along its light-emitting path. That is, this embodiment includes three first condensing lenses 2. It is assumed that the first light rays 4 emitted by each light-emitting module 1 are refracted by the corresponding first condensing lens 2 and then focused and collimated into second light rays 5. The second condensing lens 3 is disposed on the side of the multiple first condensing lenses 2 facing away from the light-emitting modules 1, and is disposed along the emission path of all second light rays 5, so that the second condensing lens 3 can receive all second light rays 5. Specifically, the second condensing lens 3 is used to refract and focus all second light rays 5 to the same focal point F. With the above design, when the light emission colors of multiple light-emitting modules 1 are designed to be the same, the brightness at the focal point can be adjusted by changing the number of light-emitting modules 1. For example, when three light-emitting modules 1 emit light simultaneously, the brightness can be tripled. Compared with the traditional method of adjusting the external resistor value, this solution has lower energy consumption. When the light emission colors of multiple light-emitting modules 1 are designed to be different, the light emission color can be changed by changing the working state of different light-emitting modules 1. For example, three light-emitting modules 1 can emit red, blue, and green light respectively to obtain three different light emission colors, meeting the user's need to switch between red, blue, and green light. This adjustment of light emission color has the advantage of being easier to operate. Moreover, since the position of all light-emitting modules 1 remains unchanged during the adjustment of light emission color, and the light emission area is always concentrated at the focal point F, the light emission area can be more accurately focused at the same position during the adjustment of light emission color. That is, the light emission area is always concentrated at the same focal point F, avoiding optical axis deflection, which would prevent it from being applied to application scenarios where the light emission color needs to be adjustable but the light emission position accuracy is extremely high.

[0027] In this embodiment, the light-emitting surfaces of the multiple light-emitting modules 1 preferably all face the same direction, and the multiple light-emitting modules 1 are designed as parallel linear light panels. This design simplifies the structure of both the first condensing lens 2 and the second condensing lens 3 when achieving the function of focusing light to the same focal point F. The first condensing lens 2 is preferably a conventional circular condensing lens. The side of the second condensing lens 3 facing the multiple first condensing lenses 2 is preferably designed as a concave surface 31, which covers all the circular condensing lenses so that the concave surface 31 can receive the second light rays 5 refracted from each of the circular condensing lenses. In addition, the side of the second condensing lens 3 facing away from the multiple first condensing lenses 2 is a convex surface 32. In fact, all the second light rays 5 refracted from each of the circular condensing lenses are refracted sequentially by the concave surface 31 and the convex surface 32 and focused to the same focal point F.

[0028] Please refer to it again. Figure 1 The visual lighting device in this embodiment also includes a housing 6. Multiple light-emitting modules 1, multiple first condensing lenses 2, and second condensing lenses 3 are all fixed inside the housing 6. In fact, the housing 6 has a light outlet 61 at the position corresponding to the second condensing lens 3 so that light can be emitted outward. Preferably, the visual lighting device may also include a control module disposed inside the housing 6. The control module is designed to be electrically connected to the multiple light-emitting modules 1 respectively, and is specifically used to control the opening or closing of the multiple light-emitting modules 1 respectively. By setting the control module, it is convenient for the user to operate the working state of each light-emitting module 1. When the light emission color of each light-emitting module 1 is the same, the user can adjust the light emission brightness at the focal point F through the control module. When the light emission color of each light-emitting module 1 is different, the user can adjust the light emission color at the focal point F through the control module.

[0029] 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 visual lighting device with multiple sets of coaxial optical arrays, characterized in that, It is used for object lighting in machine vision inspection. The vision lighting device includes at least two sets of light-emitting modules, at least two first condenser lenses and one second condenser lens. Each of the light-emitting modules has a first condensing lens on its light-emitting path. The first light emitted by each light-emitting module is refracted by the corresponding first condensing lens and then focused and collimated into a second light. The second condensing lens is disposed on the side of the plurality of first condensing lenses facing away from the light-emitting modules, and the second condensing lens is disposed on the emission path of all the second light rays so that the second condensing lens can receive all the second light rays. The second condensing lens is used to refract and focus all the second light rays to the same focal point.

2. The multi-group optical coaxial visual lighting device as described in claim 1, characterized in that, The light-emitting surfaces of the multiple sets of light-emitting modules all face the same direction, and the multiple sets of light-emitting modules are parallel to each other.

3. The visual lighting device with multiple sets of coaxial optical arrays as described in claim 2, characterized in that, The first condensing lens is a circular condensing lens.

4. The multi-group optical coaxial visual lighting device as described in claim 3, characterized in that, The side of the second condensing lens facing the plurality of first condensing lenses is concave, and the concave surface covers all the circular condensing lenses. The side of the second condensing lens facing away from the plurality of first condensing lenses is convex, and all the second light rays are refracted sequentially through the concave surface and the convex surface and converge to the same focal point.

5. The visual lighting device with multiple sets of coaxial optical arrays as described in claim 1, characterized in that, All of the aforementioned light-emitting modules emit the same color.

6. The visual lighting device with multiple sets of coaxial optical arrays as described in claim 1, characterized in that, The light-emitting modules in each group emit different colors.

7. The visual lighting device with multiple sets of coaxial optical arrays as described in claim 1, characterized in that, The visual lighting device includes three sets of light-emitting modules and three first condensing lenses, with the three first condensing lenses arranged one-to-one on the light-emitting paths of the three light-emitting modules.

8. The visual lighting device with multiple sets of coaxial optical arrays as described in claim 1, characterized in that, The visual lighting device also includes a housing, and multiple sets of light-emitting modules, multiple first condensing lenses and second condensing lenses are fixed inside the housing. The housing has a light outlet at the position corresponding to the second condensing lens.

9. The visual lighting device with multiple sets of coaxial optical arrays as described in claim 8, characterized in that, The visual lighting device also includes a control module disposed within the housing. The control module is electrically connected to multiple sets of light-emitting modules and is used to control the multiple sets of light-emitting modules to turn on or off respectively.

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