Linear combined light source device

Abstract

The utility model discloses a linear combined light source device which comprises a shell, a first linear lamp panel, a spectroscope and a second linear lamp panel. The spectroscope is arranged on a light emitting path of the first linear lamp panel and refracts light emitted by the first linear lamp panel from the first direction to the second direction, a penetrating window is formed in the position, corresponding to the spectroscope, of the outer wall of the shell, an opening is formed in the face, back to the window, of the shell, a containing groove is formed in one side of the opening, and the containing groove is communicated with the spectroscope. The second linear lamp panel is contained in the corresponding containing groove, the second linear lamp panel is parallel to the first linear lamp panel, the groove wall of each containing groove is provided with an arc-shaped reflecting face, and the arc-shaped reflecting faces are arranged on the light-emitting path of the second linear lamp panel and used for reflecting all light rays emitted by the second linear lamp panel to the same focus. The focus is located in the second direction of the spectroscope, and the central optical axis of the light emitted by the first linear lamp panel after being refracted by the spectroscope coincides with the focus.

Description

Technical Field

[0001] This utility model relates to the technical field of light sources, and in particular to a linear combined light source device. Background Technology

[0002] Currently, linear light sources are widely used in machine vision inspection. The combination of a linear light source and a beam splitter can form a coaxial optical axis. A coaxial light source means that the light emitted by the linear light source, after refraction by the beam splitter, is coaxial with the camera lens. Coaxial light avoids shadow interference and can clearly reveal minute defects such as scratches and dents on the surface of objects. It is mainly used for defect detection on objects with high reflectivity surfaces. Alternatively, tilted linear light sources can be used to form multi-angle high-brightness focused light sources to solve the inspection problems of complex surfaces, deep hole structures, or multi-layered materials. However, existing light source devices do not integrate the coaxial light source and the multi-angle high-brightness focused light source together, failing to meet various visual inspection needs. Utility Model Content

[0003] This utility model provides a linear combined light source device, which mainly solves the technical problem of how to integrate a coaxial light source and a multi-angle high-brightness focusing light source together.

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

[0005] A linear combined light source device includes a housing and a first linear lamp plate, a beam splitter, and at least one second linear lamp plate, all fixed to the housing.

[0006] The beam splitter is positioned on the light-emitting path of the first linear light panel and refracts the light emitted by the first linear light panel from a first direction to a second direction. A window penetrating along the second direction is provided on the outer wall of the housing at a position corresponding to the beam splitter. An opening is provided on the side of the housing facing away from the window, and at least one receiving groove is provided on one side of the opening. The second linear light panel is housed within a corresponding receiving groove. Both the second linear light panels are parallel to the first linear light panel. An arc-shaped reflective surface is provided on the groove wall of the receiving groove. The arc-shaped reflective surface is positioned on the light-emitting path of the second linear light panel and is used to reflect all the light emitted by the second linear light panel outside the opening and to the same focal point. The focal point is located in the second direction of the beam splitter, and the central optical axis of the light emitted by the first linear light panel after refraction by the beam splitter coincides with the focal point.

[0007] In one of the technical solutions, the receiving groove is disposed in the second direction of the first linear light panel, the direction in which the second linear light panel emits light is upward, and the arc-shaped emitting surface arches in the opposite direction of the second direction.

[0008] In one of the technical solutions, the interior of the housing is provided with two receiving slots, and the second linear lamp plate is fixed in both receiving slots. The second linear lamp plates in the two receiving slots are symmetrically arranged about the central optical axis and are parallel to the first linear lamp plate. The light emitted by the second linear lamp plates in the two receiving slots is reflected by a corresponding arc-shaped reflective surface and focused to the same focal point.

[0009] In one of the technical solutions, a focusing rod is provided between the first linear light panel and the beam splitter, and the focusing rod is positioned on the light emission path of the first linear light panel, with the length direction of the focusing rod parallel to the length direction of the first linear light panel.

[0010] In one of the technical solutions, the housing is provided with a slot whose shape is adapted to the shape of the focusing rod. The depth direction of the slot is parallel to the length direction of the first linear light panel. The slot is located at an adjacent position of the first linear light panel along the first direction. The focusing rod is inserted into the housing from the slot.

[0011] In one of the technical solutions, the focusing rod has a cylindrical structure.

[0012] In one of the technical solutions, a light-absorbing plate is provided on the side of the beam splitter facing away from the first linear lamp plate.

[0013] In one of the technical solutions, the beam splitter is at a 45° angle to the first direction, making the first direction and the second direction perpendicular to each other.

[0014] In one of the technical solutions, a heat dissipation section is provided on the outer surface of the housing.

[0015] Compared with the prior art, the linear combined light source device provided by this utility model has at least the following beneficial effects:

[0016] This design incorporates a first linear light panel and a beam splitter. The light emitted by the first linear light panel is refracted by the beam splitter and becomes coaxial light parallel to the center line of the camera lens. The design also includes a receiving slot within the housing, within which a second linear light panel is placed. An arc-shaped reflective surface is provided on the wall of the receiving slot, causing the light emitted by the second linear light panel to converge at a single focal point after reflection by the arc-shaped reflective surface. This achieves multi-angle high-brightness focused illumination. In summary, this linear combined light source device can emit both coaxial light and multi-angle high-brightness focused light, thus facilitating the rapid fulfillment of various visual inspection needs. Furthermore, the first and second linear light panels in this design are parallel to each other, and the central optical axis of the light emitted by the first linear light panel after refraction by the beam splitter coincides with the focal point of the multi-angle high-brightness focused light emitted by the second linear light panel. On the one hand, this structure allows for quick switching between coaxial light and multi-angle high-brightness focused light for individual use, thereby improving the efficiency of visual inspection. On the other hand, coaxial light and multi-angle high-brightness focused light can also be used simultaneously for illumination, which helps to meet more visual inspection needs. 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 An internal structural diagram of a linear combined light source device provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of a linear combined light source device provided in this application when used in conjunction with a camera and an object to be detected;

[0020] Figure label:

[0021] 1. Outer shell; 11. Window; 12. Opening; 13. Receiving groove; 131. Curved reflective surface; 14. Heat dissipation part; 15. Slot; 2. First linear light panel; 3. Beam splitter; 4. Second linear light panel; 5. Camera; 6. Object to be detected; 7. Focusing rod; 8. Light absorbing 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 see Figure 1This utility model embodiment provides a linear combined light source device, mainly including a housing 1, a first linear light plate 2, a beam splitter 3, and at least one second linear light plate 4, wherein the first linear light plate 2, the beam splitter 3, and the second linear light plate 4 are all fixed inside the housing 1. The beam splitter 3 is disposed on the light emission path of the first linear light plate 2. When the first linear light plate 2 emits light along a first direction X towards the beam splitter 3, the beam splitter 3 refracts the light in a second direction Y. Preferably, the beam splitter 3 forms a 45° angle with the first direction X, making the first direction X and the second direction Y perpendicular to each other, so that the direction in which the camera 5 acquires the image is in the vertical direction. A window 11 is provided on the outer wall of the outer casing 1 at the position corresponding to the beam splitter 3, extending along the second direction Y. An opening 12 is provided on the side of the outer casing 1 facing away from the window 11. At least one receiving groove 13 is provided on one side of the opening 12. The number of receiving grooves 13 is the same as the number of the second linear lamp panels 4. The second linear lamp panels 4 are housed in a corresponding receiving groove 13. The second linear lamp panels 4 are parallel to the first linear lamp panels 2. An arc-shaped reflective surface 131 is provided on the groove wall of the receiving groove 13. The arc-shaped reflective surface 131 is located on the light emission path of the second linear lamp panels 4. The arc-shaped reflective surface 131 is used to reflect all the light emitted by the second linear lamp panels 4 outside the opening 12 and reflect it to the same focal point A. The focal point A is located in the second direction Y of the beam splitter 3, and the central optical axis L of the light emitted by the first linear lamp panels 2 after refraction by the beam splitter 3 coincides with the focal point A. In fact, the receiving groove 13 is set on the second direction Y of the first linear lamp plate 2, the direction of light emitted by the second linear lamp plate 4 is upward, and the arc-shaped reflective surface 131 arches in the opposite direction of the second direction Y.

[0028] Please see Figure 2 In actual operation, the camera 5 needs to be placed in the opposite direction of the second direction Y of the window 11, and the object to be detected 6 needs to be placed in the second direction Y of the opening 12. The camera 5 will capture images of the upper surface of the object to be detected 6 through the window 11, the beam splitter 3 and the opening 12 respectively. During the image acquisition process, at least one of the first linear light panel 2 or the second linear light panel 4 will illuminate the object to be detected 6.

[0029] Specifically, this solution includes a first linear light panel 2 and a beam splitter 3. The light emitted by the first linear light panel 2 is refracted by the beam splitter 3 and can be used as coaxial light parallel to the center line of the camera lens. This solution also includes a receiving groove 13 inside the housing 1, and a second linear light panel 4 is installed inside the receiving groove 13. An arc-shaped reflective surface 131 is installed on the groove wall of the receiving groove 13, so that the light emitted by the second linear light panel 4 is focused on the same focal point A after being reflected by the arc-shaped reflective surface 131. This focal point A needs to coincide with the upper surface of the object being tested 6, thereby realizing the function of multi-angle high-brightness focused illumination of the upper surface of the object being tested 6.

[0030] In summary, the linear combined light source device of this scheme can emit both coaxial light and multi-angle high-brightness focused light, thus facilitating the rapid fulfillment of various visual inspection needs. Furthermore, the first linear light panel 2 and the second linear light panel 4 of this scheme are parallel to each other, and the central optical axis L of the light emitted by the first linear light panel 2 after refraction by the beam splitter 3 coincides with the focal point A of the multi-angle high-brightness focused light emitted by the second linear light panel 4. On the one hand, this allows for rapid switching between coaxial light and multi-angle high-brightness focused light, thereby improving the efficiency of visual inspection; on the other hand, it also enables the simultaneous application of coaxial light and multi-angle high-brightness focused light, better highlighting the defect features on the surface of the object 6 being inspected, thus facilitating the fulfillment of more visual inspection needs.

[0031] Please refer to it again. Figure 1 The housing 1 of this design has two receiving slots 13 inside, each containing a second linear light plate 4. The second linear light plates 4 in the two receiving slots 13 are symmetrically arranged about the central optical axis L and are parallel to the first linear light plate 2. The light emitted by the second linear light plates 4 in the two receiving slots 13 is reflected by a corresponding arc-shaped reflective surface 131 and focused onto the same focal point A. This design allows for multi-angle focusing of light on the object 6 from both sides, better highlighting defects on the surface of the object 6 and thus improving the accuracy of visual inspection. Furthermore, the housing 1 is equipped with a heat dissipation unit 14 to improve the heat dissipation efficiency of the light source device and extend the service life of the first linear light plate 2 and all second linear light plates 4.

[0032] Please refer to it again. Figure 1 A focusing rod 7 is positioned between the first linear light panel 2 and the beam splitter 3. The focusing rod 7 is positioned along the light emission path of the first linear light panel 2, with its length parallel to that of the first linear light panel 2. The focusing rod 7 used in conjunction with the linear light panel is typically a cylindrical structure. By using the focusing rod 7, a high-energy-density strip illumination area can be formed, which is beneficial for improving the contrast of minute defects and enhancing the transmittance of transparent or translucent materials, thereby improving the accuracy of visual inspection. Furthermore, during the process of the first linear light panel 2 reflecting light through the beam splitter 3 to form coaxial light, some light rays will be reflected multiple times, forming stray light. Therefore, this solution provides a light-absorbing plate 8 on the side of the beam splitter 3 facing away from the first linear light panel 2. The light-absorbing plate 8 absorbs light rays from non-target directions, preventing stray light from entering the imaging system. This can improve the image signal-to-noise ratio by 30-50% and increase the contrast of the drawing, which is beneficial for highlighting the defect features on the inspected object 6.

[0033] Please refer to it again. Figure 1The housing 1 is provided with a slot 15 whose shape is adapted to the shape of the spotlight rod 7. The depth direction of the slot 15 is parallel to the length direction of the first linear lamp plate 2. The slot 15 is located at an adjacent position of the first linear lamp plate 2 along the first direction X. The spotlight rod 7 is inserted into the housing 1 through the slot 15 to facilitate the installation and removal of the spotlight rod 7.

[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 linear combined light source device, characterized in that, It includes a housing, a first linear lamp plate, a beam splitter, and at least one second linear lamp plate, all fixed to the housing; The beam splitter is positioned on the light-emitting path of the first linear lamp panel and refracts the light emitted by the first linear lamp panel from a first direction to a second direction. A window penetrating along the second direction is provided on the outer wall of the housing at a position corresponding to the beam splitter. An opening is provided on the side of the housing facing away from the window, and at least one receiving groove is provided on one side of the opening. The second linear lamp panel is housed within one of the receiving grooves. The second linear lamp panel is parallel to the first linear lamp panel. An arc-shaped reflective surface is provided on the groove wall of the receiving groove. The arc-shaped reflective surface is positioned on the light-emitting path of the second linear lamp panel and is used to reflect all the light emitted by the second linear lamp panel outside the opening and to the same focal point. The focal point is located in the second direction of the beam splitter, and the central optical axis of the light emitted by the first linear lamp panel after refraction by the beam splitter coincides with the focal point.

2. The linear combined light source device as described in claim 1, characterized in that, The receiving groove is disposed in the second direction of the first linear light panel, the direction in which the second linear light panel emits light is upward, and the arc-shaped emitting surface arches in the opposite direction of the second direction.

3. The linear combined light source device as described in claim 2, characterized in that, The housing has two receiving slots inside, and the second linear lamp plate is fixed in both receiving slots. The second linear lamp plates in the two receiving slots are symmetrically arranged about the central optical axis and are parallel to the first linear lamp plate. The light emitted by the second linear lamp plates in the two receiving slots is reflected by a corresponding arc-shaped reflective surface and focused to the same focal point.

4. The linear combined light source device as described in claim 1, characterized in that, A focusing rod is disposed between the first linear light panel and the beam splitter, and the focusing rod is disposed on the light emission path of the first linear light panel, with the length direction of the focusing rod being parallel to the length direction of the first linear light panel.

5. The linear combined light source device as described in claim 4, characterized in that, The housing has a slot whose shape is adapted to the shape of the spotlight rod. The depth direction of the slot is parallel to the length direction of the first linear light panel. The slot is located at an adjacent position of the first linear light panel along the first direction. The spotlight rod is inserted into the housing through the slot.

6. The linear combined light source device as described in claim 4, characterized in that, The focusing rod has a cylindrical structure.

7. The linear combined light source device as described in claim 1, characterized in that, A light-absorbing plate is provided on the side of the beam splitter facing away from the first linear lamp plate.

8. The linear combined light source device as described in claim 1, characterized in that, The beam splitter is at a 45° angle to the first direction, making the first direction and the second direction perpendicular to each other.

9. The linear combined light source device as described in claim 1, characterized in that, The outer surface of the housing is provided with a heat dissipation section.

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