Annular optical fiber lighting device
By designing a ring fiber lighting device with multi-angle lighting and adjustable lighting field size, the problem that existing devices cannot flexibly adjust and control lighting separately is solved, and efficient light source energy utilization and diverse detection requirements are achieved.
Patent Information
- Application Number
- CN202510314761.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-06-13
AI Technical Summary
The existing annular fiber illumination device cannot flexibly adjust the position of the exit head, cannot control the lighting of each exit head alone, and the angle of the incident beam is fixed, and the illumination field size cannot be adjusted according to the needs, which limits its adaptability and light source energy utilization in actual applications.
A ring fiber lighting device is designed, adopting multiple independent fiber conduction components and multiple light sources to adjust the beam divergence angle through the diffusion sheet to achieve multi-angle lighting and adjustable lighting field size. At the same time, a light source controller is used to independently control the switch and brightness of each light source to realize multi-space three-dimensional angle lighting.
The adaptability of multi-angle lighting is achieved, the energy utilization rate of light sources is optimized, and the universality and detection accuracy of the lighting system are improved.
Smart Images
Figure CN120140692A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of industrial vision technology, and particularly to an annular optical fiber lighting device. Background Art
[0002] In the field of industrial vision, annular light illumination is widely used in surface defect detection, and the performance of its illumination light is crucial for the detection result. Its working principle is to project the illumination beam onto the sample surface at a large incident angle, so that the reflected light at the surface defect position enters the imaging system, thus forming a bright area; while the defect-free area appears as a dark area due to the lack of scattered light entering the imaging system. The contrast between the two enhances the visibility of the defect, making it easier to detect surface defects. Therefore, the incident angle of the annular light plays a key role in the image effect required for defect detection.
[0003] In addition, in some application fields, due to the different scattering characteristics of the sample surface, especially for low-scattering samples, the energy requirement of the illumination light is relatively high, and the field of view size of the illumination light determines the energy utilization efficiency of the light source. However, the existing annular optical fiber lighting devices are usually installed at a fixed angle and cannot flexibly adjust the position of the emitting head during actual assembly and testing to optimize the illumination effect, which limits their adaptability in actual applications. At the same time, the existing annular optical fiber lighting systems usually cannot control the illumination of each emitting head separately and are difficult to meet the application requirements of multi-angle three-dimensional illumination. In addition, the incident beam angle of the existing annular optical fiber lighting device is fixed and cannot adjust the illumination field of view size according to requirements, thus affecting the energy utilization rate of the light source. Summary of the Invention
[0004] For this reason, the present invention provides an annular optical fiber lighting device, which has the advantages of multi-angle illumination, adjustable illumination field of view size, controllable multi-spatial solid angle illumination, etc.
[0005] To solve the above technical problems, the present invention provides an annular optical fiber lighting device, comprising: A plurality of optical fiber conduction components, each of the optical fiber conduction components includes an incident head, a transmission section and an emitting head connected in sequence; A plurality of diffuser plates for diffusing the incident light to a specific angle; A plurality of light sources, correspondingly arranged on one side of each of the diffuser plates, wherein the incident light emitted by each of the light sources is incident on the surface of the corresponding diffuser plate, and after the incident light is diffused to a specific angle by the diffuser plate, it is incident on the incident head, and then exits from the emitting head after passing through the transmission section; A fixing component, including a fixing member and a fixing bracket, a plurality of the fixing members are uniformly distributed and installed on the fixing bracket in an annular manner, and each of the fixing members is used for installing the emitting head and can make each of the emitting heads form different illumination angles with the horizontal plane; A light source controller is connected to a plurality of the light sources and is configured to independently control the on / off and brightness of each of the light sources.
[0006] In an embodiment of the present invention, the incident head includes a cylindrical section and a flange section connected thereto.
[0007] In an embodiment of the present invention, the fixing bracket includes a horizontal mounting surface, the fixing member includes a mounting section connected to the mounting surface and an inclined section extending from the mounting section, and the inclined section is inclined with respect to the mounting surface.
[0008] In an embodiment of the present invention, a circular through-hole for inserting the exit head is radially formed in the inclined section, and a fixing hole communicating with the circular through-hole extends axially in the inclined section.
[0009] In an embodiment of the present invention, the fixing hole is a threaded hole, and a set screw that abuts against the side end of the exit head is connected in the threaded hole.
[0010] In an embodiment of the present invention, the fixing member includes a first fixing member and a second fixing member, the first fixing member and the second fixing member are circumferentially spaced apart and have the same number, and the inclined sections of the first fixing member and the second fixing member have different inclination angles.
[0011] In an embodiment of the present invention, the inclination angle of the inclined section of the first fixing member is between 34° and 36°; the inclination angle of the inclined section of the second fixing member is between 14° and 16°.
[0012] In an embodiment of the present invention, the inclination angle of the inclined section of the first fixing member is 35°; the inclination angle of the inclined section of the second fixing member is 15°.
[0013] In an embodiment of the present invention, a light passing hole is provided on the mounting surface of the fixing bracket, the center of the light passing hole serves as the center of annular illumination, a plurality of convex positioning blocks and a plurality of first mounting holes are circumferentially distributed on the mounting surface with the center of the light passing hole as the center, one end of the mounting section of the fixing member abuts against the convex positioning block, and a second mounting hole corresponding to the first mounting hole is provided on the mounting section.
[0014] In an embodiment of the present invention, the diffusion angle of the diffusion sheet is 20° or 50°.
[0015] The above technical solution of the present invention has the following advantages compared with the prior art: An annular optical fiber lighting device according to the present invention adopts a fiber optic conduction method with multiple incident heads and multiple exit heads, where each incident head corresponds to a different light source, and the exit heads are evenly distributed along the ring to achieve an annular lighting effect. By setting a diffuser to regulate the divergence angle of the light, the size of the illumination field of view can be adjusted to adapt to different detection requirements. The light source controller can independently adjust the on / off state and brightness of each light source to achieve lighting modes at different spatial solid angles. Therefore, this device not only has the adaptability of multi-angle lighting, but also can optimize the utilization rate of light source energy and improve the versatility of the lighting system. In addition, the device has a simple structural design, is convenient for assembly and debugging, and is suitable for a variety of industrial detection scenarios.
[0016] The present invention is also verified by optical simulation software, which proves that there are significant differences in the lighting effects at different diffusion angles (20° and 50°) under tilt angles (15° and 35°), and the optimization control of lighting energy and uniformity can be achieved. The 20° small-angle diffusion significantly improves the lighting energy density, while the 50° larger diffusion angle can provide a more uniform lighting area. It can be selected according to needs, can well meet diverse detection requirements, and improve lighting quality and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings.
[0018] Figure 1 It is a top view schematic diagram of the annular optical fiber lighting device of the present invention.
[0019] Figure 2 It is a schematic diagram of the annular optical fiber incident head and exit head.
[0020] Figure 3 It is a side view of the first fixing member tilted at 35 degrees.
[0021] Figure 4 It is a side view of the second fixing member tilted at 15 degrees.
[0022] Figure 5 It is a cross-sectional view of the annular optical fiber fixing member tilted at 15 degrees.
[0023] Figure 6 It is a cross-sectional view of the annular optical fiber fixing member tilted at 35 degrees.
[0024] Figure 7 It is a top view of the fixing bracket of the annular optical fiber device.
[0025] Figure 8 It is a simulation result diagram of the annular light illumination effect with the exit head tilted at 15 degrees and the beam divergence angle of 50°.
[0026] Figure 9 It is a simulation result diagram of the illumination effect of annular light with the exit head tilted at 15 degrees and the beam divergence angle of 20°.
[0027] Figure 10 It is a simulation result diagram of the illumination effect of annular light with the exit head tilted at 35 degrees and the beam divergence angle of 50°.
[0028] Figure 11 It is a simulation result diagram of the illumination effect of annular light with the exit head tilted at 35 degrees and the beam divergence angle of 20°.
[0029] Explanation of the reference numerals in the drawings of the specification: 1. Light source controller; 2. Light source; 3. Diffusion sheet; 4. Optical fiber transmission component; 401. Incident head; 402. Transmission section; 403. Exit head; 5. Fixing member; 501. First fixing member; 502. Second fixing member; 6. Fixing bracket; 601. Protruding positioning block; 602. Second mounting hole; 603. Light passing hole. Detailed implementation manners
[0030] The present invention will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the illustrated embodiments are not intended to limit the present invention.
[0031] In the present invention, when directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention.
[0032] In the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and "greater than", "less than", "exceeding", etc. are understood not to include the present number; "above", "below", "within", etc. are understood to include the present number. In the description of the present invention, if "first" and "second" are described, they are only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.
[0033] In the present invention, unless otherwise clearly defined, terms such as "arranged", "installed", "connected", etc. should be understood in a broad sense. For example, it can be directly connected, or indirectly connected through an intermediate medium; it can be a fixed connection, a detachable connection, or integrally formed; it can be a mechanical connection, an electrical connection or capable of communicating with each other; it can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in the present invention in combination with the specific content of the technical solution.
[0034] Referring to Figure 1 As shown, a ring-shaped optical fiber lighting device of the present invention includes: A plurality of optical fiber conduction components 4, each of the optical fiber conduction components 4 includes an incident head 401, a transmission section 402 and an exit head 403 connected in sequence; A plurality of diffuser sheets 3 for diffusing incident light to a specific angle; A plurality of light sources 2 are correspondingly arranged on one side of each of the diffuser sheets 3. Among them, the incident light emitted by each of the light sources 2 is incident on the surface of the corresponding diffuser sheet 3, and after the incident light is diffused to a specific angle by the diffuser sheet 3, it is incident on the incident head 401 and exits from the exit head 403 after passing through the transmission section 402; A fixing component, including a fixing member 5 and a fixing bracket 6. A plurality of the fixing members 5 are uniformly distributed and installed on the fixing bracket 6 in a ring shape. Each of the fixing members 5 is used to install the exit head 403 and can make each of the exit heads 403 form different illumination angles with the horizontal plane; A light source controller 1 is connected to the plurality of light sources 2 and is used to independently control the on / off and brightness of each of the light sources 2.
[0035] Through the above arrangement, a plurality of independent optical fiber conduction components 4 are adopted. Each optical fiber conduction component 4 is provided with an independent incident head 401, a transmission section 402 and an exit head 403, and corresponds to a plurality of independently controlled light sources 2. The divergence angle of the light beam is controlled by the diffuser sheet 3, so as to form a flexible and adjustable ring-shaped illumination field of view. The structure is modularly designed, which is convenient for installation and maintenance and has strong versatility.
[0036] Referring to Figure 2 As shown, specifically, the incident head 401 (or the exit head 403) includes a cylindrical section and a flange section connected thereto. Exemplarily, the outer diameter of the cylindrical section of the incident head 401 is 12 mm, the light-emitting diameter is 10 mm, and the flange surface diameter is 14 mm, which is convenient for installation.
[0037] Referring to Figures 3 to 6As shown, in one embodiment, the fixed bracket 6 includes a horizontal mounting surface, and the fixing member 5 includes a mounting section connected to the mounting surface and an inclined section extending from the mounting section, and the inclined section is inclined with respect to the mounting surface.
[0038] Specifically, a circular through-hole for inserting the emitting head 403 is radially formed in the inclined section, and a fixing hole communicating with the circular through-hole extends axially in the inclined section.
[0039] Specifically, the fixing hole is a threaded hole, and a setscrew that abuts against the side end of the emitting head 403 is connected in the threaded hole. The emitting head 403 can be inserted into the circular through-hole and can move back and forth along the insertion direction to determine its position, and is fixed using the setscrew.
[0040] In one embodiment, the fixing member 5 includes a first fixing member 501 and a second fixing member 502. The first fixing member 501 and the second fixing member 502 are arranged at intervals in the circumferential direction and have the same number. The inclined sections of the first fixing member 501 and the second fixing member 502 have different inclination angles.
[0041] By alternately arranging the first fixing member 501 and the second fixing member 502 with different inclination angles in the circumferential direction, multiple lighting angle selections can be provided simultaneously to achieve compound lighting, further improving the detection adaptability of the device to samples with various surface features. In addition, the lighting combination mode with different spatial solid angles can be flexibly configured to meet the lighting requirements under different working conditions, while improving the energy usage efficiency of the light source 2.
[0042] Refer to Figure 3 、 Figure 4 As shown, specifically, the inclination angle of the inclined section of the first fixing member 501 is between 34° and 36°, and the preferred inclination angle is 35°; the inclination angle of the inclined section of the second fixing member 502 is between 14° and 16°, and the preferred inclination angle is 15°.
[0043] Refer to Figure 7 As shown, specifically, a light passing hole 603 is provided on the mounting surface of the fixed bracket 6. The center of the light passing hole 603 serves as the center of annular lighting. A plurality of convex positioning blocks 601 and a plurality of first mounting holes are circumferentially distributed on the mounting surface with the center of the light passing hole 603 as the center. One end of the mounting section of the fixing member 5 abuts against the convex positioning block 601, and a second mounting hole 602 corresponding to the first mounting hole is provided on the mounting section.
[0044] Exemplarily, the convex positioning block 601 is 1 mm higher than the plane and has a length of 12 mm.
[0045] It can be understood that by pressing one end of the installation section of the fixing member 5 against the positioning block and fixing it with screws in cooperation with the first installation hole and the second installation hole 602, the positional relationship of the fixing member 5 with respect to the light passing hole 603 is determined.
[0046] In one embodiment, the diffusion angle of the diffusion sheet 3 is 20° or 50°.
[0047] Exemplarily, the light source controller 1 independently controls the light source 2. The light source controller 1 can adopt an existing general light source controller. Preferably, the number of light sources 2 is 16; among them, 8 correspond to the light emitting heads 403 installed on the first fixing member 501, and 8 correspond to the light emitting heads 403 installed on the second fixing member 502; the light source controller 1 controls the light source 2 of the light emitting heads 403 installed on the first fixing member 501 to turn on, forming a large-angle annular illumination; the light source controller 1 controls the light source 2 of the light emitting heads 403 installed on the second fixing member 502 to turn on, forming a small-angle annular illumination; the light source controller 1 controls any one or several of the light sources 2 to turn on, forming illuminations with different spatial solid angles.
[0048] According to the above configuration, in order to verify the annular illumination effect of the present invention, a simulation test was carried out using optical simulation software. Refer to Figure 8 And Figure 9 As shown, it is the illumination effects of a diffusion angle of 50° and a diffusion angle of 20° under a 15° tilt angle illumination. Refer to Figure 10 And Figure 11 As shown, it is the illumination effects of a diffusion angle of 50° and a diffusion angle of 20° under a 35° tilt angle illumination. When the diffusion angle is 50°, the light spot is larger, and an effective illumination area with a diameter of 10 mm can be achieved. At the same time, the non-uniformity is controlled within 4.8%. The illumination light spot of the diffusion angle of 20° decreases, and its illumination energy is increased by 2 times compared with the diffusion angle of 50°. It can be seen from the simulation that the change of the illumination field of different diffusion angles plays a key role in improving the light source utilization rate.
[0049] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.
Claims
1. A ring-shaped optical fiber lighting device, characterized in that: include: A plurality of optical fiber transmission components (4), each of the optical fiber transmission components (4) comprising an incident head (401), a transmission section (402) and an output head (403) connected in sequence; A plurality of diffusion sheets (3) for diffusing incident light to a specific angle; A plurality of light sources (2) are correspondingly arranged on one side of each of the diffusers (3), wherein incident light emitted by each of the light sources (2) is incident on the surface of the corresponding diffuser (3), the incident light is diffused to a specific angle by the diffuser (3), and then incident on the incident head (401), and then emitted from the emission head (403) after passing through the transmission section (402); A fixing assembly, comprising a fixing member (5) and a fixing bracket (6), wherein a plurality of the fixing members (5) are evenly distributed and mounted on the fixing bracket (6) in a ring-shaped manner, and each of the fixing members (5) is used to mount the emission head (403), and can enable each of the emission heads (403) to form a different lighting angle with a horizontal plane; A light source controller (1) is connected to the plurality of light sources (2) and is used to independently control the switching and brightness of each of the light sources (2).
2. The annular optical fiber lighting device according to claim 1, characterized in that: The incident head (401) comprises a cylindrical section and a flange section connected thereto.
3. The annular optical fiber lighting device according to claim 1, characterized in that: The fixing bracket (6) comprises a horizontal mounting surface, and the fixing member (5) comprises a mounting section connected to the mounting surface and an inclined section extending from the mounting section, wherein the inclined section is inclined to the mounting surface.
4. The annular optical fiber lighting device according to claim 3, characterized in that: A circular through hole for inserting the emission head (403) is radially provided along the inclined section, and a fixing hole connected to the circular through hole is axially extended from the inclined section.
5. The annular optical fiber lighting device according to claim 4, characterized in that: The fixing hole is a threaded hole, and a top screw that abuts against a side end of the emission head (403) is connected to the threaded hole.
6. The annular optical fiber lighting device according to claim 3, characterized in that: The fixing member (5) comprises a first fixing member (501) and a second fixing member (502); the first fixing member (501) and the second fixing member (502) are arranged at intervals along the circumferential direction and are the same in number; and the inclined sections of the first fixing member (501) and the second fixing member (502) respectively present different inclined angles.
7. The annular optical fiber lighting device according to claim 3, characterized in that: The inclination angle of the inclined section of the first fixing member (501) is between 34° and 36°; the inclination angle of the inclined section of the second fixing member (502) is between 14° and 16°.
8. The annular optical fiber lighting device according to claim 4, characterized in that: The inclination angle of the inclined section of the first fixing member (501) is 35°; the inclination angle of the inclined section of the second fixing member (502) is 15°.
9. The annular optical fiber lighting device according to claim 3, characterized in that: A light-through hole (603) is provided on the mounting surface of the fixing bracket (6), the center of the light-through hole (603) serving as the center of the annular lighting, a plurality of raised positioning blocks (601) and a plurality of first mounting holes are distributed in a circumferential direction around the center of the light-through hole (603) on the mounting surface, one end of the mounting section of the fixing member (5) abuts against the raised positioning block (601), and the mounting section is provided with a second mounting hole (602) corresponding to the first mounting hole.
10. The annular optical fiber lighting device according to claim 1, characterized in that: The diffusion angle of the diffusion sheet (3) is 20° or 50°.