A light collecting device and a light collecting detection method

Abstract

This invention relates to a light-concentrating device and a light-concentrating detection method. The light-concentrating device includes a base, a primary mirror assembly, and a secondary mirror assembly. The primary mirror assembly includes multiple lenses, including a first lens and a second lens. The secondary mirror assembly receives the light beam reflected from the primary mirror assembly in a primary stage, and then performs secondary reflection after beam reduction to a first light-transmitting aperture. By setting a first driving unit connected to the first lens via a first transmission assembly, the feasibility and accuracy of the space solar concentrating system's deployment in space are verified. By setting the primary mirror assembly and the secondary mirror assembly, the light path reversal step of simulating the projection of a light beam onto the primary mirror lens on the ground, the reflection from the primary mirror lens to the secondary mirror lens, and the beam reduction by the secondary mirror lens to form a first light spot is achieved. This allows for the verification of the collimation and energy density of the first light spot after its formation, facilitating further in-depth research on the space solar concentrating system in space.

Description

Technical Field

[0001] This application relates to the field of optics, specifically to a light-concentrating device and a light-concentrating detection method. Background Technology

[0002] Because space is unaffected by the atmospheric environment, space-based solar converging systems have the potential to achieve higher energy efficiency than terrestrial solar energy. With the development of space technology and humanity's demand for new energy sources, space-based solar converging systems have already found practical applications. However, under current launch conditions, there are certain difficulties in the manufacturing and launch of space-based solar converging systems. To solve these technical problems, it is necessary to rationally divide the large-aperture reflector into individual sub-mirror units, which, after the space-based solar converging system is launched into orbit, are deployed to their predetermined positions via a deployment mechanism.

[0003] To verify the feasibility of a large-aperture deployable solar concentrator system in space, and to experimentally test the collimation of the emitted beam and the energy density at the beam spot, a scaled-down ground-based prototype needs to be designed to meet the testing requirements. The key technical challenge in developing a ground-based prototype of the large-aperture deployable solar concentrator system is how to achieve the required beam collimation and energy density at the beam spot after deployment. Summary of the Invention

[0004] In view of the above problems, this application provides a concentrating device and a concentrating detection method, which solves the problems that need to be solved when simulating a space solar concentrating system on the ground: realizing the deployment action and verifying the beam collimation and energy density at the spot after the deployment action is completed.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a light-concentrating device, including a base, a primary mirror assembly, a first transmission assembly, a first drive unit, and a secondary mirror assembly; the base is provided with a first light-transmitting hole; the primary mirror assembly includes a plurality of lenses, including at least one first lens and at least one second lens, the first lens and the second lens being distributed circumferentially along the first light-transmitting hole, the primary mirror assembly being used to receive a parallel light beam and perform first-order reflection on it; the first transmission assembly is disposed on the base, the output end of the first transmission assembly being movably connected to the first lens, and being used to drive the first lens to rotate to reach a first calibrated position; the first drive unit is used to drive the first transmission assembly to rotate, thereby driving the first lens to rotate;

[0006] The secondary mirror assembly includes a third lens. The reflective surface of the third lens is arranged opposite to the reflective surfaces of multiple lenses in the primary mirror assembly, and the central axis of the third lens coincides with the central axis of the first light-transmitting aperture. The third lens is used to receive the light beam reflected by the primary mirror assembly and then reflect it to the first light-transmitting aperture after beam contraction.

[0007] In some embodiments, the primary lens assembly further includes a first bracket and a first fine-tuning slide. One end of the first bracket is provided with a first mounting portion, and the output end of the first transmission component is hinged to the first mounting portion. The other end of the first bracket is provided with a second mounting portion, and the base is hinged to the first bracket through the second mounting portion. The first fine-tuning slide is disposed on the first bracket, and the first lens is disposed on the first fine-tuning slide. The first fine-tuning slide is used to adjust the reflection angle of the first lens.

[0008] In some embodiments, the back of the first lens has a first circular hole, and the primary lens assembly further includes a first adapter assembly; the first adapter assembly includes a first insert and a first adapter plate, the first insert has a flange portion and an insert portion, the insert portion is embedded in the first circular hole, and the flange portion protrudes from the first circular hole; the first adapter plate is connected to the first insert through the flange portion, and the first adapter plate is connected to the first fine-tuning slide.

[0009] In some embodiments, the first transmission assembly includes a first link group and a second link group. The first link group includes a first link and a second link, which are hinged together. The second link is hinged to a first mounting portion, and the other end of the first link is drive-connected to a first drive unit. The second link group includes a third link and a fourth link, which are hinged together. The fourth link is hinged to the first mounting portion, and the other end of the third link is drive-connected to the first drive unit.

[0010] In some embodiments, the focusing device further includes a second transmission component and a second drive unit. The second transmission component is disposed on the base, and its output end is movably connected to the second lens to drive the second lens to rotate to a second calibration position. The second drive unit is used to drive the second transmission component to drive the second lens to rotate. The main lens assembly further includes a second bracket and a second fine-tuning slide. One end of the second bracket is provided with a third mounting portion, and the output end of the second transmission mechanism is hinged to the third mounting portion. The other end of the second bracket is provided with a fourth mounting portion, and the base and the second bracket are hinged through the fourth mounting portion. The second fine-tuning slide is disposed on the second bracket, and the second lens is disposed on the second fine-tuning slide. The second fine-tuning slide is used to adjust the reflection angle of the second lens.

[0011] In some embodiments, the second transmission assembly includes a third link group and a fourth link group. The third link group includes a fifth link and a sixth link, which are hinged together. The sixth link is hinged to a third mounting portion, and the other end of the fifth link is drive-connected to the second drive unit. The fourth link group includes a seventh link and an eighth link, which are hinged together. The eighth link is hinged to the third mounting portion, and the other end of the seventh link is drive-connected to the second drive unit.

[0012] In some embodiments, the second lens has a regular hexagonal structure, and the first lens and the second lens have the same shape and size. The first lens and the second lens are arranged in a ring around the circumference of the first light-transmitting hole.

[0013] In some embodiments, the secondary lens assembly further includes a third support and a third fine-tuning slide; the third fine-tuning slide is disposed on the third support, and the third lens is disposed on the third fine-tuning slide, the third fine-tuning slide being used to adjust the reflection angle of the third lens.

[0014] In some embodiments, the secondary lens assembly further includes a fourth support and a fourth fine-tuning slide. The fourth support is disposed on the base; the fourth fine-tuning slide is disposed between the fourth support and the third support, and the fourth fine-tuning slide is used to adjust the distance between the third lens and the lens of the primary lens assembly.

[0015] In a second aspect, the present invention also provides a method for detecting concentrated light, applied to the concentrated light device described in the first aspect, the method comprising:

[0016] Multiple lenses on the primary lens assembly receive the first parallel beam of light, perform a first-order reflection on the first parallel beam of light, and refract the beam of light after the first-order reflection onto the third lens.

[0017] The third lens reduces the first parallel beam after primary reflection and performs secondary reflection on the reduced beam, so that the beam after secondary reflection passes through the first light aperture to form the first light spot.

[0018] The collimation of the first parallel beam after secondary reflection and the energy density of the first spot were measured.

[0019] Unlike existing technologies, the above technical solution verifies the feasibility and accuracy of the space solar converging system's deployment in space by setting up a first drive unit connected to a first transmission component and a first mirror. At the same time, by setting up a primary mirror component and a secondary mirror component, it realizes the optical path reversal step of simulating the beam being projected onto the primary mirror on the ground, reflected by the primary mirror to the secondary mirror, and then condensed by the secondary mirror to form a first light spot. This allows for the verification of the collimation and energy density of the first light spot after its formation, facilitating further in-depth research on the space solar converging system in space.

[0020] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0021] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of the present invention and other related contents, and should not be considered as limitations on this application.

[0022] In the accompanying drawings of the instruction manual:

[0023] Figure 1 This is a schematic diagram of the focusing device described in a specific embodiment;

[0024] Figure 2 This is another schematic diagram of the focusing device described in the specific embodiment;

[0025] Figure 3 This is a schematic diagram of the primary mirror assembly described in a specific embodiment;

[0026] Figure 4 This is a cross-sectional view showing the connection between the first lens and the base in a specific embodiment;

[0027] Figure 5 This is a schematic diagram of the first lens retracting in a specific implementation method;

[0028] Figure 6 This is a schematic diagram of the secondary mirror assembly described in a specific embodiment;

[0029] Figure 7 This is a schematic diagram illustrating the principle of the first light spot formation in a specific implementation method.

[0030] Figure 8 This is a schematic diagram illustrating the steps of an exemplary concentrated light detection method.

[0031] The reference numerals in the accompanying drawings include: 1. Base; 11. First light-transmitting hole; 12. Hinge; 21. First lens; 22. Second lens; 23. First bracket; 231. First mounting part; 24. First fine-tuning slide; 251. First insert; 252. Wedge-shaped part; 253. Flat part; 26. Second bracket; 3. First transmission assembly; 311. First connecting rod; 312. Second connecting rod; 32. First shaft; 33. Coupling; 34. Reducer; 35. Bearing; 4. First drive unit; 5. Secondary lens assembly; 51. Third lens; 52. Third bracket; 53. Third fine-tuning slide; 54. Fourth bracket; 55. Fourth fine-tuning slide; 561. Third insert; 562. Third adapter plate; 571. Connector; 572. Circular tube; 6. First parallel beam. Detailed Implementation

[0032] In the following description, embodiments of the invention will be described with reference to the accompanying drawings. In the description below, the same modules are denoted by the same reference numerals. Where the same reference numerals are used, their names and functions are also the same. Therefore, their detailed description will not be repeated.

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute a limitation thereof.

[0034] Please see Figure 1 In a first aspect, the present invention provides a focusing device, comprising a base 1, a primary mirror assembly, a first transmission assembly 3, a first drive unit 4, and a secondary mirror assembly 5; the base 1 is provided with a first light-transmitting hole 11; the primary mirror assembly includes a plurality of lenses, including at least one first lens 21 and at least one second lens 22, the first lens 21 and the second lens 22 being distributed circumferentially along the first light-transmitting hole 11, the primary mirror assembly being used to receive a parallel light beam and perform a first-order reflection on it; the first transmission assembly 3 is disposed on the base 1, the output end of the first transmission assembly 3 being movably connected to the first lens 21, and being used to drive the first lens 21 to rotate to reach a first calibration position; the first drive unit 4 is used to drive the first transmission assembly 3 to rotate, thereby driving the first lens 21 to rotate; the secondary mirror assembly 5 includes a third lens 51, the reflective surface of the third lens 51 being disposed opposite to the reflective surfaces of the plurality of lenses in the primary mirror assembly, and the central axis of the third lens 51 coinciding with the central axis of the first light-transmitting hole 11, the third lens 51 being used to receive the light beam reflected by the primary mirror assembly and perform a second-order reflection after beam reduction to the first light-transmitting hole 11.

[0035] Please see Figure 1 and Figure 2 The base 1 is a specially shaped frame composed of multiple components, mainly used to fix the primary mirror assembly and the secondary mirror assembly 5. The base 1 is provided with a first light-passing hole 11, the central axis of which is the same as the projection direction of the first parallel beam 6. The central axis of the first light-passing hole 11 coincides with the central axis of the third mirror 51, so that the first light spot after beam reduction on the third mirror 51 can pass through the first light-passing hole 11 to reach the test instrument. As a preferred embodiment, the size of the first light-passing hole 11 can be set to a large aperture, which is convenient for collecting a larger first light spot and is more in line with the large-aperture simulation requirements of the space solar converging system.

[0036] Please see Figure 1 , Figure 4 and Figure 5 The primary mirror assembly includes multiple lenses, all of which are plane mirrors. The primary mirror assembly is used to perform first-order reflection of the first parallel beam 6. First-order reflection refers to the first reflection that occurs when the beam is projected onto the corresponding lens. Second-order reflection refers to the second reflection that occurs when the beam is projected onto the corresponding lens after the first reflection.

[0037] Multiple lenses are distributed circumferentially along the first light-transmitting aperture 11. In this embodiment, to reflect the first parallel beam 6 onto the third lens 51, multiple lenses on the primary mirror assembly need to be tilted circumferentially along the first light-transmitting aperture 11. Specifically, the tilting direction is such that the side of the primary mirror lens closest to the first light-transmitting aperture 11 approaches the edge of the aperture, while the side of the primary mirror lens furthest from the first light-transmitting aperture 11 extends outward. To simulate the feasibility of the space solar converging system deploying in space, the lenses include a first lens 21 and a second lens 22. The first lens 21 is used to complete the deployment test relative to the base 1. The first lens 21 is movably connected to the base 1 through a first transmission assembly 3 and a first drive unit 4. The first transmission assembly 3 can be a crank-rocker linkage mechanism, and the first drive unit 4 can be a motor. The first calibration position specifically refers to the tilt position corresponding to the reflection angle of the primary mirror lens during the test. This tilt position includes the tilt position of the first lens 21 and the tilt position of the second lens 22, wherein the tilt position of the first lens 21 is achieved through the first transmission assembly 3 and the first drive unit 4.

[0038] Please see Figure 1 and Figure 2 The secondary mirror assembly 5 includes a third mirror 51, which is a parabolic reflector that focuses the light beam. The third mirror 51 is positioned opposite the primary mirror and collects the light reflected from the primary mirror, concentrating it to form a first light spot. This first light spot originates from the center of the third mirror 51 and passes through the first light aperture 11. Data on the first light spot, including the emitted beam energy and the spot size, can be collected using appropriate testing instruments (e.g., an optical power meter, a CCD detector). The energy density and collimation of the first light spot can then be calculated.

[0039] Please see Figure 7 The first parallel beam 6 is projected onto the primary mirror lens. After primary reflection, it is refracted to the third lens 51. The third lens 51 reduces the beam after primary reflection and performs secondary reflection to the first light aperture 11. The dashed arrow in the figure indicates the direction of beam refraction.

[0040] By setting the first drive unit 4 to be connected to the first lens 21 via the first transmission component 3, the feasibility and accuracy of the space solar converging system in space are verified. At the same time, by setting the primary mirror component and the secondary mirror component 5, the optical path reversal step of simulating the beam being projected onto the primary mirror lens on the ground, reflected by the primary mirror lens to the secondary mirror lens, and then condensed by the secondary mirror lens to form the first light spot can be verified after the first light spot is formed, which is convenient for subsequent in-depth research on the space solar converging system in space.

[0041] Please see Figure 4 and Figure 5 In some embodiments, the primary lens assembly further includes a first bracket 23 and a first fine-tuning slide 24. One end of the first bracket 23 is provided with a first mounting part 231, and the output end of the first transmission component 3 is hinged to the first mounting part 231. The other end of the first bracket 23 is provided with a second mounting part, and the base 1 is hinged to the first bracket 23 through the second mounting part. The first fine-tuning slide 24 is disposed on the first bracket 23, and the first lens 21 is disposed on the first fine-tuning slide 24. The first fine-tuning slide 24 is used to adjust the reflection angle of the first lens 21.

[0042] The first bracket 23 is a right-angle bracket. The first mounting part 231 and the second mounting part are disposed on two mutually perpendicular planes of the right-angle bracket. The first mounting part 231 is an L-shaped rib. The output end of the first transmission assembly 3 is hinged to the first mounting part 231. The second mounting part is hinged to the base 1 through a hinge 12, which can be a hinged hinge 12.

[0043] The first fine-tuning slide 24 is mounted on the first bracket 23. The first fine-tuning slide 24 and the first mounting part 231 are located on opposite sides of the same flat plate of the first bracket 23. The specific mounting positions are as follows: Figure 4 As shown. The first fine-tuning slide 24 can achieve five degrees of freedom fine-tuning, specifically including rotation and translation along the x-axis, rotation and translation along the y-axis, and rotation along the z-axis. The first fine-tuning slide 24 can be a commercially available slide assembly, which can achieve five degrees of freedom fine-tuning through multi-stage connection and assembly.

[0044] By setting the first support 23, the unfolding and rotation of the first lens 21 are facilitated; by setting the first fine-tuning slide 24, the first lens 21 can be finely adjusted after unfolding to accurately reach the first calibration position, eliminating the displacement error generated by the first transmission mechanism during transmission and ensuring the feasibility of subsequent experimental steps.

[0045] Please see Figure 4 In some embodiments, the back of the first lens 21 has a first circular hole, and the main lens assembly also includes a first adapter assembly; the first adapter assembly includes a first insert 251 and a first adapter plate, the first insert 251 has a flange portion and an insert portion, the insert portion is embedded in the first circular hole, and the flange portion protrudes from the first circular hole; the first adapter plate is connected to the first insert 251 through a third mounting portion, and the first adapter plate is connected to the first fine-tuning slide 24.

[0046] The first circular hole does not penetrate the first lens 21 and is a blind hole. In a preferred embodiment, there are multiple first circular holes, for example, three, arranged circumferentially on the back of the first lens 21. The first insert 251 can be a pin with a flange, the insert representing the end of the pin away from the flange. The insert is glued into the first circular hole with epoxy resin. The flange is threaded and connected to the first adapter plate by bolts. The first adapter plate is connected to the first fine-tuning slide 24. Specifically... Figure 4 As shown, the first adapter plate can be a wedge-shaped plate. The tilt angle of the wedge-shaped plate is manufactured according to experimental needs to meet the requirement that the first lens 21 is tilted and positioned at the first light-transmitting hole 11. In a preferred embodiment, the first adapter plate includes two parts: a wedge-shaped portion 252 and a flat portion 253. The wedge-shaped portion 252 and the flat portion 253 are fastened together by bolts, the wedge-shaped portion 252 is fastened to the flange portion by bolts, and the flat portion 253 is fastened to the first fine-tuning slide 24. By setting the first adapter plate into two detachable parts and rationally arranging the fastening sequence, the assembly and disassembly of the first lens 21 and the first fine-tuning slide 24 are facilitated. This embodiment, by setting the first insert 251 and the first adapter plate, minimizes the number of workpieces and reduces processing difficulty while ensuring the rigidity of the lens body connection of the first lens 21.

[0047] Please see Figure 4 and Figure 5 , Figure 4 This indicates that the first lens 21 is in the first calibrated position, and the first transmission component 3 is in the retracted state. Figure 5 This indicates the state after the first lens 21 is retracted, at which point the first transmission assembly 3 is in a fully extended state. In some embodiments, the first transmission assembly 3 includes a first link 311 group and a second link 312 group. The first link 311 group includes a first link 311 and a second link 312, which are hinged together. The second link 312 is hinged to the first mounting portion 231, and the other end of the first link 311 is connected to the first drive unit 4. The second link 312 group includes a third link and a fourth link, which are hinged together. The fourth link is hinged to the first mounting portion 231, and the other end of the third link is connected to the first drive unit 4.

[0048] The first link group 311 includes a first link 311 and a second link 312. The first link 311 is connected to the first drive unit 4 via a first optical axis. Specifically, the output end of the first drive unit 4 is fixed to the first optical axis via a coupling 33, and the first optical axis is fixed to the first link 311 via bolts. Under the drive of the first drive unit 4, the first optical axis drives the first link 311 to rotate, thereby driving the second link 312 and the first mounting part 231 to rotate together, thus realizing the unfolding action of the first lens 21 rotating to the first calibration position. The structure of the second link group 312 is the same as that of the first link group 311. The first link group 311 and the second link group 312 are arranged side by side, which can enhance the transmission stability of the first transmission assembly 3.

[0049] In some embodiments, the focusing device further includes a second transmission component and a second drive unit. The second transmission component is disposed on the base 1, and its output end is movably connected to the second lens 22 to drive the second lens 22 to rotate to a second calibration position. The second drive unit is used to drive the second transmission component to drive the second lens 22 to rotate. The main lens assembly further includes a second bracket 26 and a second fine-tuning slide. One end of the second bracket 26 is provided with a third mounting part, and the output end of the second transmission mechanism is hinged to the third mounting part. The other end of the second bracket 26 is provided with a fourth mounting part, and the base 1 and the second bracket 26 are hinged through the fourth mounting part. The second fine-tuning slide is disposed on the second bracket 26, and the second lens 22 is disposed on the second fine-tuning slide. The second fine-tuning slide is used to adjust the reflection angle of the second lens 22.

[0050] In this embodiment, the second lens 22 is movably connected to the base 1 in the same manner as the first lens 21. Both the second lens 22 and the first lens 21 can be deployed and retracted, facilitating a more accurate simulation of the deployment of the space solar converging system on the ground. The second lens 22 is movably connected to the base 1 via a second transmission assembly and a second drive unit. The second transmission assembly can be a crank-rocker linkage mechanism, and the second drive unit can be a motor. The second calibration position specifically refers to the tilt position corresponding to the reflection angle of the primary mirror lens during the test. The tilt position of the second lens 22 is achieved through the second transmission assembly and the second drive unit. The second bracket 26 is a right-angle bracket. The second mounting part and the second mounting part are set on two mutually perpendicular planes of the right-angle bracket. The second mounting part is an L-shaped rib, and the output end of the second transmission assembly is hinged to the second mounting part. The second mounting part is hinged to the base 1 via a hinge 12, which can be a hinged hinge 12. The second bracket 26 has the same structure as the first bracket 23.

[0051] The second fine-tuning slide is mounted on the second bracket 26. The second fine-tuning slide and the second mounting part are located on opposite sides of the same flat plate of the second bracket 26. The second fine-tuning slide can achieve five degrees of freedom fine-tuning, specifically including rotation and translation along the x-axis, rotation and translation along the y-axis, and rotation along the z-axis. The second fine-tuning slide can be a commercially available slide assembly, which can be connected and assembled in multiple stages to achieve five degrees of freedom fine-tuning.

[0052] By setting the second support 26, the second lens 22 can be easily unfolded and rotated. By setting the second fine-tuning slide, the second lens 22 can be finely adjusted after unfolding to accurately reach the second calibration position, eliminating the displacement error generated by the second transmission mechanism during transmission and ensuring the feasibility of subsequent experimental steps.

[0053] In some embodiments, the back of the second lens 22 has a second circular hole, and the primary lens assembly further includes a second adapter assembly; the second adapter assembly includes a second insert and a second adapter plate, the shape and connection method of the second insert and the second adapter plate are the same as those of the first insert 251 and the first adapter plate, and will not be described here. This embodiment, by setting the second insert and the second adapter plate, minimizes the number of workpieces and reduces processing difficulty while ensuring the connection rigidity of the second lens 22.

[0054] In some embodiments, the second transmission assembly includes a third link group and a fourth link group. The third link group includes a fifth link and a sixth link, which are hinged together. The sixth link is hinged to a third mounting portion, and the other end of the fifth link is drive-connected to the second drive unit. The fourth link group includes a seventh link and an eighth link, which are hinged together. The eighth link is hinged to the third mounting portion, and the other end of the seventh link is drive-connected to the second drive unit.

[0055] The third linkage group includes a fifth linkage and a sixth linkage. The fifth linkage is connected to the second drive unit via the second optical axis. Specifically, the output end of the second drive unit is fixed to the second optical axis via a coupling 33, and the second optical axis is fixed to the fifth linkage via bolts. Under the drive of the second drive unit, the second optical axis drives the fifth linkage to rotate, thereby driving the sixth linkage and the second mounting part to rotate together, thus realizing the deployment action of the second lens 22 rotating to the second calibration position. The structure of the sixth linkage group is the same as that of the third linkage group. The third and sixth linkage groups are arranged side by side, which can enhance the transmission smoothness of the second transmission component.

[0056] Please see Figure 1In some embodiments, the second lens 22 has a regular hexagonal structure. The first lens 21 and the second lens 22 have the same shape and size. One side of adjacent first lenses 21 and second lenses 22 is connected. The first lenses 21 and the second lenses 22 are arranged in a ring around the circumference of the first light-transmitting hole 11. Both the first lenses 21 and the second lenses 22 are part of the primary mirror assembly. By setting the first lenses 21 and the second lenses 22 into a regular hexagonal structure, it is easy to form an inclined conical ring plane in the flat state, and it is also easy to process. When the first lenses 21 and the second lenses 22 are folded up, they can form a near-cylindrical shape, which is easy to store and is more in line with the application scenario of space solar converging system with limited deployment and operation space.

[0057] Please see Figure 6 In some embodiments, the secondary mirror assembly 5 further includes a third support 52 and a third fine-tuning slide 53; the third fine-tuning slide 53 is disposed on the third support 52, and the third lens 51 is disposed on the third fine-tuning slide 53. Optionally, the third lens 51 is disposed on the third adapter plate 562 via a third insert 561, and the third adapter plate 562 is disposed on the third fine-tuning slide 53. The connection relationship between the third lens 51, the third insert 561, and the third adapter plate 562 can be referred to the connection structure between the first lens 21, the first insert 251, and the first adapter plate, and will not be described here. The third fine-tuning slide 53 is used to adjust the reflection angle of the third lens 51. The third support 52 is a right-angle support. A third fine-tuning slide 53 is set on one side of the third support 52 in the vertical plane. The third fine-tuning slide 53 can realize four degrees of freedom fine-tuning, specifically including rotation and translation of the x-axis, and transmission and translation of the y-axis. By setting the third fine-tuning slide 53, after the primary mirror lens completes the unfolding action and refracts the light beam, the third mirror 51 can be finely adjusted to accurately collect and shrink the light beam after the first reflection and emit it through the center point of the third mirror 51, accurately passing through the first light-transmitting hole 11, eliminating the displacement error generated by the third mirror 51 during the installation process, and ensuring the feasibility of subsequent experimental steps.

[0058] Please see Figure 6In some embodiments, the secondary mirror assembly 5 further includes a fourth support 54 and a fourth fine-tuning slide 55. The fourth support 54 is disposed on the base 1; the fourth fine-tuning slide 55 is disposed between the fourth support 54 and the third support 52, and is used to adjust the distance between the third lens 51 and the lens of the primary mirror assembly. The fourth support 54 specifically includes a fourth plane, a connector 571, and a circular tube 572, wherein the connector 571 is fixedly connected to the circular tube 572, the circular tube 572 is fixedly connected to the base 1, the fourth plane is disposed on the connector 571, and the fourth fine-tuning slide 55 is provided on the fourth plane. As a preferred embodiment, the number of circular tubes 572 can be multiple to improve the supporting rigidity of the circular tubes 572 and meet the requirements of the secondary mirror assembly 5. The tilt angle between the circular tube 572 and the base 1 is processed according to actual needs, and the ultimate goal is to ensure that the third lens 51 is parallel to the plane where the first light-transmitting aperture 11 is located, which facilitates subsequent data measurement of the beam after beam reduction. The fourth fine-tuning slide 55 is used to adjust the translational amount of the z-axis. By cooperating with the third fine-tuning slide 53, the fourth fine-tuning slide 55 can achieve five degrees of freedom adjustment of the secondary mirror assembly 5. The adjustment method of the fourth fine-tuning slide 55 is z-axis adjustment, which corresponds to the z-axis rotation adjustment in the first fine-tuning slide 24 on the primary mirror assembly, thus forming a six-degree-of-freedom adjustment of the entire focusing device, which meets the fine-tuning needs of various scenarios during the experiment.

[0059] Please see Figure 8 In a second aspect, the present invention also provides a method for detecting concentrated light, applied to the concentrated light device described in the first aspect, the method comprising the following steps:

[0060] S1. Multiple lenses on the primary lens assembly receive the first parallel beam, perform a first-order reflection on the first parallel beam, and refract the beam after the first-order reflection onto the third lens.

[0061] S2. The third lens reduces the first parallel beam after primary reflection and performs secondary reflection on the reduced beam, so that the beam after secondary reflection passes through the first light aperture to form the first light spot.

[0062] S3. Measure the collimation of the first parallel beam after secondary reflection and the energy density of the first spot.

[0063] The above technical solution verifies the feasibility and accuracy of the space solar converging system in space by setting the first drive unit 4 to be connected to the first lens 21 via the first transmission component 3. At the same time, by setting the primary mirror component and the secondary mirror component 5, the optical path reversal step of simulating the beam of light being projected onto the primary mirror lens on the ground, reflected by the primary mirror lens to the secondary mirror lens, and then reduced by the secondary mirror lens to form the first light spot can be realized. This allows the collimation and energy density of the first light spot to be verified after it is formed, which is convenient for subsequent in-depth research on the space solar converging system in space. Specific implementation examples:

[0065] A focusing device has a mechanical structure comprising a primary mirror assembly, a secondary mirror assembly 5, and a base 1. The base 1 includes a central mounting flange and a supporting fixture. A first lens 21 in the primary mirror assembly is movably mounted to the base 1; for ease of distinction, this is referred to as the deployable sub-mirror assembly. A second lens 22 in the primary mirror assembly is fixedly mounted to the base 1; for ease of distinction, this is referred to as the fixed sub-mirror assembly. The deployable sub-mirror assembly, the fixed sub-mirror assembly, and the secondary mirror assembly 5 are connected to the central mounting flange by screws. The supporting fixture supports all of the above components.

[0066] The central mounting flange has a first light-passing hole 11 with a diameter of 100mm. The rear of the central mounting flange is placed on the upper surface of the support fixture and connected with screws to ensure the overall stability of the focusing device. Six regular hexagonal sub-mirrors (first lens 21 and second lens 22) with a side-to-side distance of 160mm are evenly distributed around its front end. The central mounting flange is also used to support the unfolding mechanism (i.e., the first transmission component 3) and its drive component (i.e., the first drive unit 4) of the unfoldable sub-mirror assembly. The support fixture also includes a 155° circular tube 572 for fixing the secondary mirror assembly 5. The circular tube 572 is connected to the middle of the central mounting flange with screws. The third lens 51 in the secondary mirror assembly 5 has a diameter of 90mm. The circular tube 572 is made of three carbon fiber tubes with an outer diameter of 12mm arranged in a triangle to ensure the support rigidity of the secondary mirror.

[0067] The primary mirror assembly shown in this embodiment is divided into a deployable sub-mirror assembly and a fixed sub-mirror assembly. The deployable sub-mirror assembly includes a first lens 21, a first bracket 23, and a first fine-tuning slide 24. The first lens 21 is mounted on the first fine-tuning slide 24, which is a five-degree-of-freedom precision fine-tuning slide. Specifically, it can be assembled from commercially available single-degree-of-freedom precision fine-tuning slides. The fixed sub-mirror assembly has an aluminum alloy body and is fixed to the central mounting flange by a right-angled bent plate.

[0068] The specific method of using the focusing device is as follows: after the deployable sub-mirror assembly is deployed to the first calibration position, parallel light is perpendicularly irradiated onto the main mirror assembly. After two reflections by the main and secondary mirrors, the parallel beam after beam reduction is emitted from the light-passing hole of the central mounting flange Φ100mm. The feasibility of the deployment scheme of the large-aperture deployable solar converging system can be verified by measuring the collimation of the emitted beam and the energy density at the light spot.

[0069] In this embodiment, the back of the first lens 21 of the deployable sub-lens assembly is designed with a first circular hole. The first insert 251 is glued into the first circular hole with epoxy resin. The flange of the first insert 251 is attached to the back of the first lens 21 and connected to the first adapter plate by screws. In order to facilitate installation and disassembly, the screws connecting the first insert 251 and the first adapter plate are assembled from the bottom, and then the first adapter plate is connected to the first fine-tuning slide 24.

[0070] In this embodiment, the first bracket 23 is a right-angle bracket, including a first horizontal plane and a first vertical plane. The first vertical plane is used to support the first fine-tuning slide 24. The outer side of the first vertical plane is connected to the output end of the first connecting rod 311 group through an L-shaped hinge 12 (i.e., the first mounting part 231). The first connecting rod 311 group includes a first connecting rod 311 and a second connecting rod 312. The second connecting rod 312 is engaged with the first mounting part 231 through a Φ12 rotating shaft. The end of the first horizontal plane is also connected to the base 1 through a hinge 12. The first bracket 23 can rotate under the drive of the first transmission assembly 3. The other end of the second connecting rod 312 is also engaged with the first connecting rod 311 through a Φ12 rotating shaft. The first connecting rod 311 is locked to the first shaft 32 by a locking screw. The first shaft 32 is supported by a double deep groove ball bearing 35 with double support points and unidirectional fixation. Each bearing 35 has a retaining ring on its outer side to restrict the axial movement of the first shaft 32. One end of the first shaft 32 transmits torque through a high-rigidity diaphragm coupling 33, which allows for a 0.6° deflection angle and 0.2mm eccentricity. A stepper motor (i.e., the first drive unit 4) and a reducer 34 with a reduction ratio of 50:1 are mounted on one side of the base 1. The reducer 34 is keyed to the high-rigidity diaphragm coupling 33. The deployable sub-mirror assembly unfolds from its retracted position to the first calibration position, i.e., the first bracket 23 rotates 84° clockwise around the hinge 12. The stepper motor operates, and through the aforementioned transmission chain, the first shaft 32 rotates 140° to complete the unfolding action. The stepper motor brake locks the first shaft 32 in place.

[0071] The first transmission component 3 of the deployable sub-mirror assembly is a crank-rocker linkage mechanism. The crank is the first connecting rod 311, which serves as the driving element and is designed as a double fixed clamp type connecting rod with a length of 150mm. The mirror mount (i.e., the first support 23) is equivalent to a rocker with a length of 213mm. Here, the rod length specifically refers to the distance between the hinge point between the first support and the base and the hinge point between the first support and the second connecting rod. The second connecting rod 312 is designed as a double-sided bearing connecting rod with a length of 198mm. The deployable sub-mirror assembly can complete the deployment action by rotating the third connecting rod around the hinge 12 by 84° and the crank around the input shaft by 140° from the retracted position to the first calibration position.

[0072] The unfoldable sub-mirror (first lens 21) shown in this embodiment is rear-mounted with a five-degree-of-freedom first fine-tuning slide 24. With the rotation axis as the z-axis, the sub-mirror can achieve precise adjustments of rotation around the x, y, and z axes and translation around the x and y axes. The third lens 51 is rear-mounted with a four-degree-of-freedom third fine-tuning slide 53 and is placed on a single-degree-of-freedom fourth fine-tuning slide 55 via a right-angled support plate. The secondary mirror (i.e., the third lens 51) can achieve precise adjustments of rotation around the x and y axes and translation around the x, y, and z axes. The distance between the primary and secondary mirrors can be adjusted by the translation around the z-axis of the secondary mirror, reducing the number of degrees of freedom that need to be adjusted.

[0073] This embodiment has at least the following advantages:

[0074] (1) The main mirror assembly is designed in a modular way. The main mirror assembly includes a set of deployable sub-mirror assemblies and five sets of fixed sub-mirror assemblies. In the design, since the deployment mechanism of each sub-mirror unit adopts a crank-rocker linkage mechanism, the feasibility of the deployment mechanism can be verified by a set of deployable sub-mirror assemblies, which reduces the overall processing and assembly difficulty of the focusing device.

[0075] (2) The first lens 21 of the expandable sub-lens assembly adopts a three-point support method on the back. The first insert 251 is glued to the round hole on the back of the first lens 21 with epoxy resin. The bottom flange of the first insert 251 is attached to the lens body of the first lens 21 and connected to the first adapter plate with screws. While ensuring the lens body connection rigidity of the first lens 21, the number of workpieces is reduced as much as possible, and the processing difficulty is reduced.

[0076] (3) The unfolding mechanism of the unfoldable sub-mirror assembly is a crank-rocker linkage mechanism, wherein the first linkage 311 is designed as a double fixed clamp type connecting rod, and the mirror mount is equivalent to a rocker in the crank-rocker mechanism. The unfoldable sub-mirror assembly unfolds from the folded position to the first calibration position, that is, the rocker rotates 84° around the hinge 12 and the crank rotates 140° around the input shaft to complete the unfolding action.

[0077] (4) The first shaft 32 of the unfoldable sub-mirror assembly unfolding mechanism is supported by a double deep groove ball bearing 35 with double support points and unidirectional fixation to ensure that the first shaft 32 will not bend or deform. The drive motor is placed outside the linkage mechanism. The coaxiality of the output shaft of the motor and reducer 34 and the input shaft of the crank rocker mechanism is ensured by the support fixture. The torque is transmitted by connecting the rotating shaft through a high rigidity diaphragm coupling 33. The coupling 33 can tolerate a 0.6° deflection angle and a 0.2mm eccentricity to avoid the rotation accuracy of the input shaft of the crank rocker mechanism due to the machining error of the fixture.

[0078] (5) The back plates of the sub-mirror and the secondary mirror of the expandable sub-mirror assembly are both equipped with a five-degree-of-freedom precision adjustment slide. With the rotation axis as the z-axis, the sub-mirror can achieve precise adjustment of rotation around the x, y, and z axes and translation around the x and y axes. The secondary mirror can achieve precise adjustment of rotation around the x and y axes and translation around the x, y, and z axes. The secondary mirror is circular and does not need to be designed for rotation adjustment around the z-axis. The distance between the primary and secondary mirrors can be adjusted by translation around the z-axis of one of the mirrors, reducing the number of degrees of freedom that need to be adjusted.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0081] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A light collecting device, characterized by The utility model relates to a kind of optical system, including: Base, is equipped with first light hole; Main mirror assembly, including multiple lenses, the lens includes at least one first lens and at least one second lens, the first lens and the second lens are distributed along the first light hole circumference, the main mirror assembly is used to receive parallel light beam and carry out first reflection;The main mirror assembly further includes: first support, one end of the first support is equipped with first mounting portion, the output end of first transmission component is hinged with the first mounting portion, the other end of the first support is equipped with second mounting portion, and the base is hinged with the first support by the second mounting portion;First fine adjustment sliding table is arranged on the first support, and the first lens is arranged on the first fine adjustment sliding table, and the first fine adjustment sliding table is used to adjust the reflection angle of the first lens; First transmission component is arranged on base, and the output end of the first transmission component is movably connected with the first lens, for driving the first lens to rotate to reach first calibration position; First drive unit is used to drive the first transmission component to rotate, to drive the first lens to rotate; Sub-mirror assembly, including third lens, the reflection surface of the third lens is oppositely arranged with the reflection surface of multiple lenses in the main mirror assembly, and the central axis of the third lens coincides with the central axis of the first light hole, the third lens is used to receive light beam via first reflection of the main mirror assembly and carry out second reflection to first light hole after beam shrinkage.

2. A light collecting device according to claim 1, characterized in that The back of the first lens has a first circular hole, and the main mirror assembly further includes a first adapter component; The first adapter component includes: First inlay has flange portion and inlay portion, the inlay portion is embedded in the first circular hole, and the flange portion is arranged protruding from the first circular hole; First adapter plate is connected with the first inlay through the flange portion, and the first adapter plate is connected with the first fine adjustment sliding table.

3. A light collecting device according to claim 1, characterized in that The first transmission component includes: First connecting rod group includes first connecting rod and second connecting rod, the first connecting rod is hinged with the second connecting rod, the second connecting rod is hinged with the first mounting portion, and the other end of the first connecting rod is drivingly connected with the first drive unit; Second connecting rod group includes third connecting rod and fourth connecting rod, the third connecting rod is hinged with the fourth connecting rod, the fourth connecting rod is hinged with the first mounting portion, and the other end of the third connecting rod is drivingly connected with the first drive unit.

4. A light collecting device according to claim 1, characterized in that Further including: Second transmission component is arranged on the base, and the output end of the second transmission component is movably connected with the second lens, for driving the second lens to rotate to second calibration position; Second drive unit is used to drive the second transmission component to drive the second lens to rotate; The main mirror assembly further includes: Second support, one end of the second support is equipped with third mounting portion, the output end of the second transmission component is hinged with the third mounting portion, the other end of the second support is equipped with fourth mounting portion, and the base is hinged with the second support by the fourth mounting portion. A second fine adjustment sliding table is arranged on the second support, and the second lens is arranged on the second fine adjustment sliding table, and the second fine adjustment sliding table is used for adjusting the reflection angle of the second lens.

5. A light collecting device according to claim 4, characterized in that The second transmission assembly comprises: A third linkage group comprises a fifth linkage and a sixth linkage, the fifth linkage and the sixth linkage are hinged, the sixth linkage is hinged with the third mounting part, and the other end of the fifth linkage is in transmission connection with the second driving unit; A fourth linkage group comprises a seventh linkage and an eighth linkage, the seventh linkage and the eighth linkage are hinged, the eighth linkage is hinged with the third mounting part, and the other end of the seventh linkage is in transmission connection with the second driving unit.

6. A light collecting device according to claim 1, characterized in that The second lens is a regular hexagonal structure, the first lens and the second lens have the same shape and size, and the first lens and the second lens are arranged in a ring shape on the circumference of the first light transmission hole.

7. A light collecting device according to claim 1, characterized in that The secondary mirror assembly further comprises: A third support; A third fine adjustment sliding table is arranged on the third support, and the third lens is arranged on the third fine adjustment sliding table, and the third fine adjustment sliding table is used for adjusting the reflection angle of the third lens.

8. A light collecting device according to claim 7, characterized in that The secondary mirror assembly further comprises: A fourth support is arranged on the base; A fourth fine adjustment sliding table is arranged between the fourth support and the fourth support, and the fourth fine adjustment sliding table is used for adjusting the distance between the third lens and the lens of the primary mirror assembly.

9. A light condensing detection method characterized by, The method is applied to the light condensing device of any one of claims 1-8, and the method comprises: A plurality of lenses on the primary mirror assembly receive a first parallel light beam, perform first-order reflection on the first parallel light beam, and fold the light beam after first-order reflection to the third lens; The third lens performs beam shrinking on the first parallel light beam after first-order reflection, and performs second-order reflection on the light beam after beam shrinking, so that the light beam after second-order reflection passes through the first light transmission hole to form a first light spot; The collimation degree of the first parallel light beam after second-order reflection and the energy density of the first light spot are measured.

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