Large-view-field sunlight receiving and conducting system

Abstract

The invention discloses a large-view-field sunlight receiving and conducting system, and relates to the technical field of sunlight receiving and conducting. The system is formed by modularization cascade amplification of a plurality of independent light condensation devices, each independent light condensation device comprises a protection cover, a lens, a lens array and an optical fiber array, and the lenses, the lens arrays and the optical fiber arrays are sequentially arranged in the protection covers from top to bottom in an overlapped mode; the system further comprises a light splitting device composed of light transmission optical fibers, and the light splitting device is used for disordering and rearranging the optical fiber bundles from the multiple independent light condensation devices to achieve out-of-order uniform output of the optical fibers. Large-view-field sunlight collection is achieved through modular cascade amplification, damage of strong light to a device is reduced through spectral pupil design, the efficiency is improved through optical fiber array coupling, output light intensity uniformity is achieved through optical fiber out-of-order rearrangement, optical fiber light condensation energy can be effectively improved, end face damage is reduced, and the device is suitable for large-view-field sunlight collection. The system is suitable for various scenes such as indoor illumination and agricultural light supplement.

Description

Technical Field

[0001] This invention belongs to the field of sunlight receiving and conducting technology, and particularly relates to a large field-of-view sunlight receiving and conducting system. Background Technology

[0002] To reduce lighting energy consumption and improve the lighting environment, many lighting engineers both domestically and internationally have conducted extensive research in recent years, proposing numerous methods and ideas for guiding and transmitting sunlight. These can be summarized into the following main methods: 1. Reflector method: Using a reflector to reflect sunlight onto the indoor areas that need lighting in one go; this method has a significant effect on improving the uniformity of lighting through side windows, but it causes serious light pollution. 2. Light guide tube method: The light collected by the solar concentrator is transmitted to the indoor area that needs lighting through a light guide tube. However, its transmission efficiency for sunlight is relatively low. It is inexpensive and suitable for short-distance light guiding lighting. 3. Fiber Optic Method: This method combines a series of technologies such as solar tracking and lens focusing to significantly increase the brightness of sunlight at the focal point, and guides the light to the place where light is needed through high-transmittance fiber optics.

[0003] However, the aforementioned solar-guided light sources suffer from low solar coupling efficiency and limited light energy density. The receiver is easily damaged, has a limited field of view, is difficult to increase, and has uneven light intensity distribution in the end-use lighting environment, so there is room for improvement. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a large field-of-view sunlight receiving and transmission system. Its advantages include achieving a large aperture and wide field of view, increasing the total transmission volume, reducing harmful components, lowering maintenance costs, ensuring uniform illumination at the light-emitting end, effectively improving the focusing energy of the optical fiber, reducing end-face damage, and ensuring that the light ultimately enters a single energy-transmitting optical fiber for convenient transmission to the appropriate location.

[0005] To solve the above-mentioned technical problems, the specific technical solution of the present invention is as follows: In some embodiments of this application, a large field-of-view sunlight receiving and conducting system is provided, which is composed of multiple independent light-concentrating devices modularly cascaded and expanded to achieve sunlight collection over a larger field of view; Each of the independent focusing devices includes a protective cover, a lens, a lens array, and an optical fiber array, wherein the lens, lens array, and optical fiber array are stacked sequentially from top to bottom inside the protective cover; The system also includes a beam splitter, which is composed of optical fibers and is used to shuffle and rearrange the fiber bundles from multiple independent beam focusing devices to achieve uniform output of disordered optical fibers.

[0006] In some embodiments of this application, the individual focusing devices are distributed at equal distances.

[0007] In some embodiments of this application, the optical fiber is arranged in a randomized, bundled configuration for transmission.

[0008] In some embodiments of this application, the optical fibers in the optical fiber array are selected based on the application scenario, using optical fibers with different band transmission characteristics.

[0009] In some embodiments of this application, the optical fiber is a high-efficiency lighting optical fiber with high ultraviolet and infrared loss in the visible light band, or a low-loss agricultural supplemental lighting optical fiber in the yellow-green light band.

[0010] In some embodiments of this application, in each of the independent focusing devices, the lens is a Fresnel lens, used to focus light from multiple directions and angles onto the light guide end of the optical fiber.

[0011] In some embodiments of this application, in each of the independent focusing devices, the lens and lens array constitute a split-pupil imaging system for splitting incident sunlight into multiple parts and coupling them into the fiber array respectively.

[0012] In some embodiments of this application, the lens array adopts a hexagonal design.

[0013] In some embodiments of this application, the overall size of the fiber array end face is larger than the equivalent field of view of the sun on the ground, leaving a margin for aiming error during the sun aiming and tracking process.

[0014] In some embodiments of this application, a transmission device is also included, which includes a focusing optical cable and an optical cable splitter for converging and transmitting light collected by multiple independent focusing devices.

[0015] The beneficial effects of this invention are as follows: Firstly, a splitting pupil design is implemented at the sunlight receiving point. Before sunlight couples into the optical fiber, a lens array is used to achieve pupil splitting, allowing each lens to receive a portion of the sunlight, reducing damage to optical fibers and other components from strong sunlight. Secondly, the lens array can achieve 100% space fill rate, improving coupling efficiency, and utilizes the wavelength filtering effect of the optical fiber itself to reduce interference from infrared and ultraviolet light. Finally, during illumination, randomized beam splitting of the optical fiber ensures uniform output beams, achieving a large aperture, wide field of view, and increased total transmission volume. This reduces harmful components, lowers maintenance costs, and ensures uniform illumination at the light-emitting end, effectively improving the focusing energy of the optical fiber and reducing end-face damage. Simultaneously, the light ultimately enters a single energy-transmitting optical fiber for convenient transmission to the appropriate location. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the light-concentrating device structure of a large field-of-view sunlight receiving and conducting system proposed in this invention; Figure 2 This is a schematic diagram of the transmission device structure of a large field-of-view sunlight receiving and conducting system proposed in this invention; Figure 3 This is a schematic diagram of the optical path structure of a large field-of-view sunlight receiving and conducting system proposed in this invention; Figure 4 This is a schematic diagram of the working process structure of a large field-of-view sunlight receiving and conducting system proposed in this invention.

[0017] In the diagram: 10. Protective cover; 11. Lens; 12. Lens array; 13. Fiber optic array; 14. Optical cable; 21. Independent focusing device; 22. Focusing device optical cable; 23. Optical cable splitter; 24. Light transmission fiber; 31. Sunlight rays. Detailed Implementation

[0018] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0019] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0020] Reference Figure 1-3 A wide field-of-view sunlight receiving and transmission system includes a focusing device, a transmission device, and a beam splitting device. The focusing device consists of a protective cover 10, a lens 11, a lens array 12, and an optical fiber array 13. The lens 11, lens array 12, and optical fiber array 13 are all located inside the protective cover 10. The lens 11, lens array 12, and optical fiber array 13 are stacked sequentially from top to bottom. The focusing device is used to converge the collected light. The optical path structure of the focusing device includes sunlight rays 31, a beam splitting pupil imaging system composed of the lens 11 and lens array 12, an optical fiber array 13, and an optical cable 14, which allows sunlight to be split into multiple parts and coupled into the optical fiber respectively.

[0021] The transmission device consists of an independent focusing device 21, a focusing device optical cable 22, and an optical cable splitter 23. The focusing device optical cable 22 is located between the independent focusing device 21 and the optical cable splitter 23. One end of the focusing device optical cable 22 is connected to the independent focusing device 21, and the other end of the focusing device optical cable 22 is connected to the optical cable splitter 23. The beam splitter consists of optical fiber 24. The beam splitter is used to shuffle and rearrange the optical fiber bundle to achieve uniform output of disordered optical fibers.

[0022] In this embodiment, there are several lenses 12, which are distributed in an equidistant array inside the protective cover 10; there are several optical fibers 13, which are distributed in an equidistant array inside the protective cover 10; the optical fiber 13 is arranged in a randomized bundled combination for transmission; the independent focusing device 21 is composed of several focusing devices, which are distributed at equal distances.

[0023] In each independent light-gathering device, the end face of the fiber array 13 is designed to be installed at the imaging focal length of the combination of the Fresnel lens 11 and the lens array 12, thus enabling a beam splitting optical path design. The lens array adopts a hexagonal design, which can achieve a 100% space filling rate and avoid light leakage between the various beam splitting surfaces after beam splitting. Due to the high intensity of sunlight, the thermal effect after convergence is significant. In order to reduce the damage of the thermal effect of sunlight convergence to the laser device, including components such as the lens array 12 and the fiber array 13, a beam splitting optical path design is adopted to achieve the segmentation of sunlight intensity, reduce the light flux of each lens 12 and fiber 13, and reduce the damage caused by the thermal effect of sunlight convergence. In addition, the beam splitting optical path design not only achieves the segmentation of light intensity, but also achieves uniform segmentation of light intensity, ensuring that the total amount of sunlight collected by each lens is the same, that is, the light intensity input to each fiber 13 is the same, providing a prerequisite for the fiber 13 to achieve uniform light transmission.

[0024] Meanwhile, the overall size of the fiber array end face must meet the equivalent field of view of the sun on the ground. In the design, it can be larger than the field of view of the sun to leave a margin for the tracking error of the light collection device during the sun aiming and tracking process, so as to ensure that a larger field of view of sunlight can be collected within the tracking accuracy.

[0025] The fiber array 13 forms an optical cable, in which multiple optical fibers can transmit to different application scenarios. At the same time, appropriate optical fibers can be selected according to the application scenario. The spectral transmission characteristics of the optical fibers themselves can be used to achieve filtering and selection of different bands. For example, in the scenario requiring lighting, optical fibers with high efficiency in the visible light band and high loss in the ultraviolet and infrared bands can be selected; if it is used for agricultural or green plant supplemental lighting applications, optical fibers with low loss in the yellow-green light bands can be selected. At the same time, a combination of optical fibers suitable for multiple scenarios can be used, or broadband transmission optical fibers can be used, and independent filtering systems can be used in specific application scenarios to select and filter the effective optical band components.

[0026] Then, in specific optical energy application scenarios, by selecting an appropriate number of optical fibers from the multiple optical cables of the expanded optical collection devices, the output light intensity distribution can be optimized. Due to potential deviations in optical cable transmission efficiency and the light collection efficiency of each independent unit, if optical fibers are output from only one optical collection device, the light intensity will be uneven. Therefore, by selecting an appropriate number of optical fibers from multiple optical collectors, the output light intensity of the optical fibers in each application scenario can be adjusted, while further ensuring the uniformity of light intensity.

[0027] Reference Figure 4 A method for using a wide field-of-view sunlight receiving and conducting system includes the following steps: Step 1: A large field-of-view sunlight receiving and transmission system consists of multiple focusing devices, which are modularly cascaded and expanded from multiple individual integrated independent focusing devices to achieve sunlight collection over a larger field of view; Step 2: Place a Fresnel lens 11 inside each sunlight receiver. Through the light-gathering effect of the Fresnel lens 11, light rays from multiple directions and angles are focused onto the light guide end of the optical fiber. Step 3: Each Fresnel lens 11 corresponds to a set of microlens arrays 12, and the microlens arrays 12 correspond to fiber arrays 13. The light-guiding end of the fiber array 13 should be located at the focal length of the imaging system composed of the Fresnel lens 11 and the microlens, that is, on the image plane. The light-emitting end extends infinitely. Numerous fiber arrays 13 form an optical cable. After transmission over a certain distance, the light is converged by a focusing optical fiber and finally evenly split to achieve indoor lighting.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A large field-of-view sunlight receiving and conducting system, characterized in that, It consists of multiple independent light-gathering devices (21) modularly cascaded and expanded to achieve a larger field of view for sunlight collection; Each of the independent focusing devices (21) includes a protective cover (10), a lens (11), a lens array (12), and an optical fiber array (13), wherein the lens (11), the lens array (12), and the optical fiber array (13) are stacked sequentially from top to bottom inside the protective cover (10); The system also includes a beam splitter, which is composed of optical fiber (24) and is used to shuffle and rearrange the fiber bundles from multiple independent beam focusing devices (21) to achieve uniform output of disordered optical fibers.

2. The large field-of-view sunlight receiving and conducting system according to claim 1, characterized in that, The independent focusing devices (21) are distributed at equal distances.

3. The large field-of-view sunlight receiving and conducting system according to claim 1, characterized in that, The optical fiber (24) is arranged in a randomized bundled configuration for transmission.

4. The large field-of-view sunlight receiving and conducting system according to claim 1, characterized in that, The optical fiber (24) is arranged in a randomized bundled configuration for transmission.

5. A large field-of-view sunlight receiving and conducting system according to claim 4, characterized in that, The optical fiber is either a high-efficiency lighting optical fiber in the visible light band and a high-loss ultraviolet-infrared optical fiber, or a low-loss agricultural supplemental lighting optical fiber in the yellow-green light band.

6. The large field-of-view sunlight receiving and conducting system according to claim 1, characterized in that, In each of the independent focusing devices (21), the lens (11) is a Fresnel lens, used to focus light from multiple directions and angles onto the light guide end of the optical fiber.

7. A large field-of-view sunlight receiving and conducting system according to claim 1, characterized in that, In each of the independent focusing devices (21), the lens (11) and the lens array (12) constitute a split-pupil imaging system for splitting incident sunlight into multiple parts and coupling them into the fiber array (13) respectively.

8. A large field-of-view sunlight receiving and conducting system according to claim 7, characterized in that, The lens array (12) adopts a hexagonal design.

9. A large field-of-view sunlight receiving and conducting system according to claim 1, characterized in that, The overall size of the fiber array (13) end face is larger than the equivalent field of view of the sun on the ground, leaving a margin for aiming error during the sun aiming and tracking process.

10. A large field-of-view sunlight receiving and conducting system according to claim 1, characterized in that, It also includes a transmission device, which includes a focusing optical cable (22) and an optical cable splitter (23) for converging and transmitting the light collected by multiple independent focusing devices (21).

Images