A multi-color adjustable parallel coaxial light source device

Abstract

The utility model discloses a multicolor adjustable parallel coaxial light source device, including first casing, first casing end portion is equipped with copper base PCB board, copper base PCB board one side is provided with a plurality of LED lamp, LED lamp front end is provided with the light splitting mirror, the light splitting mirror is set up and is inclined 45 DEG, copper base PCB board is equipped with the diffusion plate between the light splitting mirror and LED lamp, the light of diffusion plate and LED lamp is perpendicular, still be provided with the fresnel lens between diffusion plate and LED lamp, LED lamp is multicolor independent control array, first casing end portion still is equipped with the heat dissipation cover plate, and the heat dissipation cover plate and copper base PCB board between fill have the heat conduction component, the heat conduction component will copper base PCB board and the heat of LED lamp generation is transferred to the heat dissipation cover plate, the utility model discloses can export the light of a variety of colors to the outside, thereby adapts to different scenes, improves the heat dissipation efficiency, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of coaxial light source technology, and in particular to a multi-color adjustable parallel coaxial light source device. Background Technology

[0002] Coaxial light sources used in industrial automation have high requirements for their uniformity, brightness, and working distance.

[0003] During the manufacturing process, cards, flat metal objects, and reflective surfaces (such as acrylic glass and ceramics) often develop defects such as scratches, indentations, bumps, wrinkles, marks, and ripples. The severity of these defects varies depending on the maturity of the manufacturing process. To improve product quality, inspection equipment is typically used for defect detection to achieve quality control. Coaxial light sources can provide more uniform and collimated illumination than traditional light sources, while also preventing objects from emitting light themselves. Applying coaxial light sources to inspection equipment can improve the accuracy of the inspection process.

[0004] Existing coaxial light sources are often designed for a single application scenario, mostly using monochrome LEDs, and have relatively limited functionality, making them unsuitable for detecting various material surfaces (such as metal reflections and glass transparency). Changing the application scenario requires configuring a separate light source, which is costly and inconvenient. Furthermore, because coaxial light sources emit light outwards, they require internal energy conversion, generating significant heat. Insufficient heat dissipation results in impure light, prone to wavelength changes, and a shorter lifespan. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as single light source and insufficient heat dissipation, and to provide a multi-color adjustable parallel coaxial light source device that can output light of multiple colors to adapt to different scenarios; improve heat dissipation efficiency and extend service life.

[0006] To achieve the above objectives, this utility model provides a multi-color adjustable parallel coaxial light source device, including a first housing. A copper-based PCB board is mounted on the end of the first housing. Multiple LEDs are arranged on one side of the copper-based PCB board. A beam splitter is arranged at the front end of each LED, and the beam splitter is tilted at 45°. A diffuser is installed between the beam splitter and the LED, and the diffuser is perpendicular to the light from the LED. A Fresnel lens is also arranged between the diffuser and the LED. The LED is a multi-color independently controlled array. A heat dissipation cover is also mounted on the end of the first housing. A heat-conducting component is filled between the heat dissipation cover and the copper-based PCB board, and the heat-conducting component transfers the heat generated by the copper-based PCB board and the LEDs to the heat dissipation cover.

[0007] Preferably, the LED array is soldered to the front side of a copper-based PCB board; the copper-based PCB board has a thickness of ≥2mm and a thermal conductivity of ≥400W / (m·K).

[0008] Preferably, the thermally conductive component is thermally conductive silicone grease, and the back of the copper-based PCB board is coated with thermally conductive silicone grease, the thickness of the thermally conductive silicone grease is 0.1 mm, and the thermal resistance is <0.5℃ / W.

[0009] Preferably, the heat dissipation cover includes a third connecting plate and a plurality of arrayed heat dissipation columns mounted on the third connecting plate. The third connecting plate is fixedly connected to the first housing. The bottom surface of the third connecting plate is flat and coated with thermal grease. The thermal grease contacts the back of the copper-based PCB board. The heat dissipation cover is an aluminum material component.

[0010] Preferably, the LED light includes a plurality of red LED lights, a plurality of blue LED lights, and a plurality of green LED lights; the wavelength of the red LED lights is 660nm, the wavelength of the blue LED lights is 450nm, and the wavelength of the green LED lights is 520nm.

[0011] Preferably, the first housing is provided with a first receiving groove for accommodating a copper-based PCB board, and a second receiving groove for accommodating a diffuser plate on the side of the first housing away from the LED lamp. A third receiving groove for accommodating a Fresnel lens is provided on one side of the second receiving groove. The Fresnel lens is closely disposed on one side of the diffuser plate and cooperates with the second receiving groove to fix the diffuser plate. Several fixing screws for fixing the Fresnel lens are provided on both sides of the first housing.

[0012] Preferably, the focal length of the Fresnel lens is between 50-100mm, and the diffuser plate converts the ring-shaped light spot output by the Fresnel lens into a uniform surface light source; the beam splitter is a coated beam splitter, and the transmittance:reflectance ratio of the beam splitter is 3:7, with the reflected light path coaxial with the lens.

[0013] Preferably, a second housing is inserted into one end of the first housing, and the beam splitter is installed between the first housing and the second housing. The first housing includes a first connecting plate installed on one side and a second connecting plate installed on the other side. The first connecting plate and the second connecting plate are arranged in parallel, with the second housing installed in the middle, and are fixedly connected by connecting bolts.

[0014] Preferably, a first inclined surface with a 45° angle is provided between the first connecting plate and the second connecting plate, and the beam splitter is mounted on the upper part of the first inclined surface; the second housing is provided with a second inclined surface that is adapted to the first inclined surface, and a fourth receiving groove for mounting one end of the beam splitter is provided at one end of the second inclined surface, and a fifth receiving groove for mounting the other end of the beam splitter is provided at the other end; the beam splitter is held between the fourth receiving groove and the fifth receiving groove.

[0015] Preferably, the second housing has openings on both the upper and lower sides, and the lower part of the beam splitter is equipped with an anti-reflection dustproof lens for dust prevention. The first housing has a sixth receiving groove for accommodating the anti-reflection dustproof lens. The sixth receiving groove cooperates with the second housing to fix the anti-reflection dustproof lens. The end of the second housing is also provided with a threaded connection hole for convenient fixing and installation.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The LED light of this utility model adopts a multi-color independent control array, which can output light of multiple colors to adapt to different scenarios; the multi-color light emitted by the LED light passes through a Fresnel lens, a diffuser plate and a beam splitter in sequence to achieve parallel light output, which can adapt to the surface inspection needs of objects of various materials and can clearly detect scratches, gaps and other defects on reflective surfaces.

[0018] 2. The first housing end of this utility model is equipped with a heat dissipation cover plate. A heat-conducting component is filled between the heat dissipation cover plate and the copper-based PCB board. The heat-conducting component transfers the heat generated by the copper-based PCB board and the LED light to the heat dissipation cover plate, and then to the first housing and the outside air through the heat dissipation cover plate to achieve air cooling, thereby improving heat dissipation efficiency, achieving cooling, ensuring the accuracy of the emitted light, and extending the service life of the light source. Attached Figure Description

[0019] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front structural diagram of a multi-color adjustable parallel coaxial light source device provided by this utility model;

[0021] Figure 2This is a schematic diagram of the bottom structure of a multi-color adjustable parallel coaxial light source device provided by this utility model;

[0022] Figure 3 This is a sectional view of a multi-color adjustable parallel coaxial light source device provided by this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of a multi-color adjustable parallel coaxial light source device provided by this utility model;

[0024] Figure 5 This is a front structural diagram of the first housing provided by this utility model;

[0025] Figure 6 This is a schematic diagram of the back structure of the first housing provided by this utility model;

[0026] Figure 7 This is a front structural diagram of the heat dissipation cover provided by this utility model;

[0027] Figure 8 This is a front structural diagram of the second housing provided by this utility model.

[0028] The diagram includes:

[0029] 1. First housing; 2. Copper-based PCB board; 3. LED light; 4. Beam splitter; 5. Diffuser plate; 6. Fresnel lens; 7. Heat sink cover; 71. Third connecting plate; 72. Heat sink column; 11. First receiving groove; 12. Second receiving groove; 13. Third receiving groove; 8. Fixing screw; 24. Second housing; 91. First connecting plate; 92. Second connecting plate; 93. Connecting bolt; 94. First inclined slope; 95. Second inclined slope; 41. Fourth receiving groove; 42. Fifth receiving groove; 21. Opening; 23. Anti-reflective dustproof lens; 43. Sixth receiving groove; 22. Threaded connection hole. Detailed Implementation

[0030] The technical solution of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please refer to Figures 1 to 8 This utility model provides a multi-color adjustable parallel coaxial light source device.

[0032] like Figure 1As shown, the multi-color adjustable parallel coaxial light source device includes a first housing 1 and a second housing 24 inserted inside the first housing 1. A copper-based PCB board 2 is installed at the end of the first housing 1. Multiple LEDs 3 are arranged on one side of the copper-based PCB board 2. The copper-based PCB board 2 is also connected to a light source line 99, which provides power to the copper-based PCB board 2. The copper-based PCB board 2 controls the LEDs 3 to emit light. Furthermore, the LEDs 3 are multi-color independently controlled arrays, which can output different colors of light. The copper-based PCB board 2 controls the LEDs 3 to light up, thereby controlling the color of the light output by the LEDs 3; for example: red light, blue light, green light, or white light.

[0033] like Figure 4 As shown, a beam splitter 4 is provided at the front end of the LED light 3. The beam splitter 4 is tilted at 45°. A diffuser plate 5 is installed between the beam splitter 4 and the LED light 3. The diffuser plate 5 is perpendicular to the light from the LED light 3. A Fresnel lens 6 is also provided between the diffuser plate 5 and the LED light 3. The light emitted by the LED light 3 passes through the Fresnel lens 6 and is evenly dispersed by the diffuser plate 5. The beam splitter 4 reflects the light to the lower part. An object to be illuminated is placed below. The object will then show clear scratches, gaps, and other defects on the reflective surface through the beam splitter 4. The image can be taken directly above the anti-reflective dustproof lens 23.

[0034] The LED lights 3 are multi-color independently controlled arrays, employing multiple LED lights 3 of various colors, resulting in significant heat generation and necessitating heat dissipation. Specifically, a heat dissipation cover 7 is installed at the end of the first housing 1. A heat-conducting component is filled between the heat dissipation cover 7 and the copper-based PCB board 2. The heat-conducting component transfers the heat generated by the copper-based PCB board 2 and the LED lights 3 to the heat dissipation cover 7. The heat dissipation cover 7 then transfers the heat to the first housing 1 and the external air, achieving air cooling, thereby improving heat dissipation efficiency, ensuring accurate light emission, and extending the lifespan of the light source.

[0035] In this embodiment, the thermally conductive component is thermally conductive silicone grease, and the back of the copper-based PCB board 2 is coated with thermally conductive silicone grease. The thickness of the thermally conductive silicone grease is 0.1 mm, and the thermal resistance is <0.5℃ / W. In other embodiments, the thermally conductive component can be thermally conductive adhesive, thermally conductive pipe, or liquid crystal, etc. It can transfer the heat inside the copper-based PCB board 2 in a timely manner to achieve heat exchange.

[0036] In this embodiment, the LED lamps 3 are arranged in an array and soldered to the front side of the copper-based PCB board 2; in order to enhance heat transfer, the thickness of the copper-based PCB board 2 is ≥2mm and the thermal conductivity is ≥400W / (m·K).

[0037] like Figure 7 As shown, the heat dissipation cover 7 includes a third connecting plate 71 and a plurality of arrayed heat dissipation columns 72 mounted on the third connecting plate 71. The third connecting plate 71 is fixedly connected to the first housing 1 by bolts. The bottom surface of the third connecting plate 71 is flat and coated with thermally conductive silicone grease, which contacts the back of the copper-based PCB board 2. In this embodiment, the heat dissipation cover 7 is preferably made of aluminum or copper. In order to enhance heat dissipation, the first housing 1 is also preferably made of aluminum or copper, thereby increasing heat exchange efficiency and heat exchange capacity.

[0038] By improving heat dissipation efficiency, the temperature of the copper-based PCB board is ≤60℃ (20℃ lower than that of the traditional aluminum substrate), and its lifespan is extended by 2 times.

[0039] like Figure 7 As shown, the LED light 3 includes several red LEDs, several blue LEDs, and several green LEDs; the wavelength of the red LEDs is 660nm, the wavelength of the blue LEDs is 450nm, and the wavelength of the green LEDs is 520nm; pure color light, such as blue light, is output by independently controlling each color LED; white light is output by combining RGB.

[0040] like Figure 6 As shown, the first housing 1 is provided with a first receiving groove 11 for accommodating the copper-based PCB board 2. The copper-based PCB board 2 is installed inside the first receiving groove 11 and pressed by the heat dissipation cover plate 7, and fixed together with the first housing 1, so as to realize the installation and fixation of the copper-based PCB board 2.

[0041] like Figure 3 As shown, the first housing 1 has a second receiving groove 12 for accommodating the diffuser plate 5 on the side away from the LED lamp 3, and a third receiving groove 13 for accommodating the Fresnel lens 6 on the side of the second receiving groove 12. The Fresnel lens 6 is closely attached to one side of the diffuser plate 5 and cooperates with the second receiving groove 12 to fix the diffuser plate 5. Several fixing screws 8 for fixing the Fresnel lens 6 are provided on both sides of the first housing 1.

[0042] The Fresnel lens 6 has a focal length between 50-100mm and a ring tilt gradient design (5° at the center → 45° at the edge) to eliminate spherical aberration. In this embodiment, the model of the Fresnel lens 6 is 7707-5.

[0043] The diffuser plate 5 has a haze value of ≥90%, which transforms the annular light spot output by the Fresnel lens 6 into a uniform surface light source; the uniformity of the output light: the combination of the Fresnel lens 6 and the diffuser plate 5 makes the light spot uniformity >95% (measured standard deviation <3%).

[0044] like Figure 3 As shown, the beam splitter 4 is a coated beam splitter, installed at a 45° angle. The transmittance:reflectance ratio of the beam splitter 4 is 3:7, and the reflected light path is coaxial with the lens.

[0045] like Figure 1 As shown, a second housing 24 is inserted into one end of the first housing 1, as... Figure 3 As shown, the beam splitter 4 is installed between the first housing 1 and the second housing 24, as... Figure 5 As shown, the first housing 1 includes a first connecting plate 91 mounted on one side and a second connecting plate 92 mounted on the other side; the first connecting plate 91 and the second connecting plate 92 are arranged in parallel, with the second housing 24 mounted in the middle, and are fixedly connected by connecting bolts 93. The second housing 24 is assembled and fixed by insert and connecting bolts 93.

[0046] Specifically, such as Figure 5 As shown, a first inclined plane 94 is provided between the first connecting plate 91 and the second connecting plate 92. The first inclined plane 94 is at a 45° angle, and the beam splitter 4 is mounted on the upper part of the first inclined plane 94; Figure 8 As shown, the second housing 24 is provided with a second inclined surface 95, which is adapted to the first inclined surface 94. One end of the second inclined surface 95 is provided with a fourth receiving groove 41 for mounting one end of the beam splitter 4, and the other end is provided with a fifth receiving groove 42 for mounting the other end of the beam splitter 4; Figure 3 As shown, the beam splitter 4 is positioned between the fourth receiving groove 41 and the fifth receiving groove 42, thereby achieving stable installation of the beam splitter 4.

[0047] like Figure 1 and Figure 2 As shown, the second housing 24 has openings 21 on both the upper and lower sides, and the lower part of the beam splitter 4 is equipped with an anti-reflective dustproof lens 23 for dust prevention, as shown. Figure 6 As shown, the first housing 1 is provided with a sixth receiving groove 43 for accommodating the anti-reflective dustproof lens 23. The sixth receiving groove 43 cooperates with the second housing 24 to fix the anti-reflective dustproof lens 23, thereby achieving stable installation of the anti-reflective dustproof lens 23.

[0048] like Figure 2 As shown, the second housing 24 is also provided with a threaded connection hole 22 at its end for easy fixed installation.

[0049] The specific implementation of the multi-color adjustable parallel coaxial light source device is: used for detecting glass scratches;

[0050] The copper-based PCB board 2 controls the LED light 3 to light up, turns on the blue LED light 3 (450nm), and emits blue light outward. The current drive is 500mA and the duty cycle is 80%.

[0051] The optical path of the blue light: the light is focused by Fresnel lens 6 → uniformly scattered by diffuser plate 5 → reflected at 45° by beam splitter 4 → perpendicularly illuminates the glass surface.

[0052] Heat dissipation verification: After 8 hours of continuous operation, the infrared thermal imager showed that the highest temperature of the copper-based PCB board 2 was 58℃, and the temperature of the heat sink 72 was 42℃.

[0053] Imaging performance: The contrast of images captured by the industrial camera is improved by 40%, and the scratch recognition accuracy reaches 0.01mm.

[0054] Assembly steps of the multi-color adjustable parallel coaxial light source device:

[0055] Step S1: Place the diffuser plate 5 into the second receiving groove 12 and place the Fresnel lens 6 into the third receiving groove 13. The Fresnel lens 6 is closely attached to one side of the diffuser plate 5 and cooperates with the second receiving groove 12 to fix the diffuser plate 5.

[0056] Step S2: Fixing screws 8 are installed on both sides of the first housing 1 to fix the Fresnel lens 6;

[0057] Step S3: The LED lamp 3 array is set and soldered to the front side of the copper-based PCB board 2;

[0058] Step S4: Place the soldered copper-based PCB board 2 inside the first housing 1;

[0059] Step S5: One end of the light source line 99 passes through the first housing 1 and is soldered to the internal copper-based PCB board 2;

[0060] Step S6: Apply thermal grease to one side of the copper-based PCB board 2, install the copper-based PCB board 2 inside the first receiving groove 11, and press it tightly with the heat dissipation cover plate 7, and fix it together with the first housing 1, thereby realizing the installation and fixation of the copper-based PCB board 2.

[0061] Step S7: Place the anti-reflective dustproof lens 23 inside the sixth receiving groove 43; place the beam splitter 4 between the fourth receiving groove 41 and the fifth receiving groove 42;

[0062] Step S8: Place the anti-reflective dustproof lens 23 and the second housing 24 on the upper part of the first inclined slope 94 to install and fix the beam splitter 4 and the anti-reflective dustproof lens 23; use the connecting bolts 93 to fix and assemble the first housing 1 and the second housing 24 together, thereby completing the final assembly.

[0063] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A multi-color adjustable parallel coaxial light source device, characterized in that: The device includes a first housing (1), a copper-based PCB board (2) is mounted on the end of the first housing (1), a plurality of LED lights (3) are arranged on one side of the copper-based PCB board (2), a beam splitter (4) is arranged at the front end of the LED lights (3), the beam splitter (4) is tilted at 45°, a diffuser plate (5) is installed between the beam splitter (4) and the LED lights (3), the diffuser plate (5) is perpendicular to the light of the LED lights (3); a Fresnel lens (6) is also arranged between the diffuser plate (5) and the LED lights (3); the LED lights (3) are multi-color independent control arrays, a heat dissipation cover plate (7) is also mounted on the end of the first housing (1), a heat-conducting component is filled between the heat dissipation cover plate (7) and the copper-based PCB board (2), the heat-conducting component transfers the heat generated by the copper-based PCB board (2) and the LED lights (3) to the heat dissipation cover plate (7).

2. The multi-color adjustable parallel coaxial light source device according to claim 1, characterized in that: The LED lamps (3) are arranged in an array and soldered to the front of the copper-based PCB board (2); the thickness of the copper-based PCB board (2) is ≥2mm and the thermal conductivity is ≥400W / (m·K).

3. The multi-color adjustable parallel coaxial light source device according to claim 2, characterized in that: The thermally conductive component is thermally conductive silicone grease. The back of the copper-based PCB board (2) is coated with thermally conductive silicone grease. The thickness of the thermally conductive silicone grease is 0.1 mm and the thermal resistance is <0.5℃ / W.

4. The multi-color adjustable parallel coaxial light source device according to claim 3, characterized in that: The heat dissipation cover (7) includes a third connecting plate (71) and a plurality of array heat dissipation columns (72) mounted on the third connecting plate (71). The third connecting plate (71) is fixedly connected to the first housing (1). The bottom surface of the third connecting plate (71) is a plane and is coated with thermal grease. It contacts the back of the copper-based PCB board (2) through the thermal grease. The heat dissipation cover (7) is an aluminum material component.

5. The multi-color adjustable parallel coaxial light source device according to claim 2, characterized in that: The LED lamp (3) includes several red LED lamps, several blue LED lamps and several green LED lamps; the wavelength of the red LED lamp is 660nm, the wavelength of the blue LED lamp is 450nm and the wavelength of the green LED lamp is 520nm.

6. The multi-color adjustable parallel coaxial light source device according to claim 4, characterized in that: The first housing (1) is provided with a first receiving groove (11) for accommodating a copper-based PCB board (2), and a second receiving groove (12) for accommodating a diffuser plate (5) is provided on the side of the first housing (1) away from the LED lamp (3). A third receiving groove (13) for accommodating a Fresnel lens (6) is provided on the side of the second receiving groove (12). The Fresnel lens (6) is closely attached to the side of the diffuser plate (5) and cooperates with the second receiving groove (12) to fix the diffuser plate (5). Several fixing screws (8) for fixing the Fresnel lens (6) are provided on both sides of the first housing (1).

7. The multi-color adjustable parallel coaxial light source device according to claim 6, characterized in that: The focal length of the Fresnel lens (6) is between 50-100mm. The diffuser plate (5) converts the ring-shaped light spot output by the Fresnel lens (6) into a uniform surface light source. The beam splitter (4) is a coated beam splitter. The transmittance: reflectance of the beam splitter (4) is 3:

7. The reflected light path is coaxial with the lens.

8. The multi-color adjustable parallel coaxial light source device according to claim 1, characterized in that: The first housing (1) has a second housing (24) inserted at one end. The beam splitter (4) is installed between the first housing (1) and the second housing (24). The first housing (1) includes a first connecting plate (91) installed on one side and a second connecting plate (92) installed on the other side. The first connecting plate (91) and the second connecting plate (92) are arranged in parallel, and the second housing (24) is installed in the middle and fixedly connected by connecting bolts (93).

9. A multi-color adjustable parallel coaxial light source device according to claim 8, characterized in that: A first inclined surface (94) is provided between the first connecting plate (91) and the second connecting plate (92). The first inclined surface (94) is 45°. The beam splitter (4) is installed on the upper part of the first inclined surface (94). The second housing (24) is provided with a second inclined surface (95). The second inclined surface (95) is adapted to the first inclined surface (94). One end of the second inclined surface (95) is provided with a fourth receiving groove (41) for installing one end of the beam splitter (4), and the other end is provided with a fifth receiving groove (42) for installing the other end of the beam splitter (4). The beam splitter (4) is locked between the fourth receiving groove (41) and the fifth receiving groove (42).

10. A multi-color adjustable parallel coaxial light source device according to claim 9, characterized in that: The second housing (24) has openings (21) on both the upper and lower sides. The lower part of the beam splitter (4) is equipped with an anti-reflection dustproof lens (23) for dust prevention. The first housing (1) is provided with a sixth receiving groove (43) for accommodating the anti-reflection dustproof lens (23). The sixth receiving groove (43) cooperates with the second housing (24) to fix the anti-reflection dustproof lens (23). The end of the second housing (24) is also provided with a threaded connection hole (22) for easy fixing and installation.

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