Optical integrator suitable for high-power solar simulator

Abstract

The invention provides an optical integrator suitable for a high-power solar simulator, which belongs to the technical field of optical element design, and comprises an integrator lens base, a lens pressing block, a compression screw, a first lens group, a water outlet pipeline joint, a water inlet pipeline joint, a second lens group and a cylindrical light transmission structure, the lens mounting holes are arranged in a honeycomb shape, the lens mounting holes in the two end surfaces are in one-to-one correspondence, a cylindrical light transmission structure is arranged between the corresponding lens mounting holes, and the first lens group and the second lens group are parallelly mounted on the lens mounting holes of the integrator lens seat and are fixed through lens pressing blocks and compression screws. The outlet pipeline connector and the inlet pipeline connector are arranged on the upper side and the lower side of the integrator lens base respectively, and the problems that the coaxiality and the parallelism of corresponding lenses between the first lens set and the second lens set are poor are solved, and the problems that a cooling medium channel is large in machining difficulty, small in heat dissipation area, long in cooling medium energy transmission path and low in heat dissipation efficiency are solved.

Description

Technical Field

[0001] This invention belongs to the field of optical element design technology, and more specifically, it is an optical integrator suitable for high-power solar simulators. Background Technology

[0002] A solar simulator is an optical energy transfer system primarily used in aerospace, defense, agriculture, and ecological simulation. In practical applications, an integrator is typically used to homogenize the light beam to achieve a uniform irradiation surface. However, because the light beam emitted by the solar simulator's light source has high energy, the integrator's temperature rises rapidly during operation. If heat dissipation is not timely, this can lead to deformation of the frame and lenses, thus degrading the overall performance of the solar simulator; or, excessive energy can cause the lenses to shatter due to a rapid increase in temperature, resulting in integrator malfunction.

[0003] Existing integrator lens mounts are all split-type, with the first and second lens groups mounted on two separate integrator lens mounting plates. The heat dissipation structure involves machining cooling grooves on the outside of the lens mounting area on each integrator lens mounting plate, then sealing these grooves by welding or bolting, serving as channels for the cooling medium. The heat dissipation method involves circulating the cooling medium through the cooling grooves of the integrator lens mounting plate, allowing the medium to dissipate heat to the integrator lens mounting plate and the lenses of the first and second lens groups through heat conduction. The disadvantages of this method are that optical integrators have very high requirements for the coaxiality, parallelism of the mounting surfaces, and spacing of corresponding lenses between the first and second lens groups. The split structure makes it difficult to guarantee the positional relationship of corresponding lenses in the first and second lens groups, and the cooling medium channels are difficult to machine, have a small heat dissipation area, a long energy transfer path, and low heat dissipation efficiency.

[0004] To address these issues, an optical integrator suitable for high-power solar simulators is provided. Summary of the Invention

[0005] This invention provides an optical integrator suitable for high-power solar simulators, which can solve the problems of poor coaxiality and parallelism between corresponding lenses in the first and second mirror groups, as well as the problems of difficult processing of cooling medium channels, small heat dissipation area, long energy transmission path of cooling medium, and low heat dissipation efficiency.

[0006] An optical integrator suitable for a high-power solar simulator includes an integrator mirror mount, a lens clamping block, a clamping screw, a first mirror group, an outlet water pipe connector, an inlet water pipe connector, a second mirror group, and a cylindrical light-transmitting structure. Lens mounting holes are provided on both ends of the integrator mirror mount in a honeycomb pattern, with each mounting hole corresponding to the previous one. A cylindrical light-transmitting structure is provided between the corresponding mounting holes. The first and second mirror groups are mounted parallel to each other on the lens mounting holes of the integrator mirror mount and fixed by the lens clamping block and clamping screw. The outlet and inlet pipe connectors are located on the upper and lower sides of the integrator mirror mount, respectively. Cooling medium flows inside the integrator mirror mount.

[0007] Furthermore, the cylindrical light-transmitting structure is coaxial with the lens mounting hole; a gap is left between the two cylindrical light-transmitting structures, and the cooling medium flows in the gap.

[0008] Furthermore, the lens clamps are hexagonal clamps, with each lens fixed by 3 lens clamps, and each lens clamp can press 3 lenses with 3 sides.

[0009] Furthermore, the contact edge between the lens clamp and the lens is curved, and the curvature is consistent with the curvature of the lens at the contact position.

[0010] Furthermore, the lens clamping block is secured by a clamping screw.

[0011] The integrator mirror mount is 3D printed in one piece.

[0012] Beneficial effects:

[0013] The integrator mirror mount is an integrated structure, with the cooling medium evenly distributed between the two mirror groups. This results in a short energy transmission distance and significantly increases the heat dissipation area and improves heat dissipation efficiency, ensuring the overall performance of the high-power solar simulator. When the heat load on the integrator mirror frame is 20 kW, the water cooling flow rate is 0.5 m³ / h, and the flow velocity is 0.3 m / s, the highest temperature on the integrator is 40°C, the lowest temperature is 35°C, and the temperature distribution is uniform. Attached Figure Description

[0014] Figure 1 Main view;

[0015] Figure 2 Left view;

[0016] Figure 3 Rear view;

[0017] Figure 4 Cross-sectional view at MM;

[0018] Figure 5 Schematic diagram of lens clamping block;

[0019] Figure 6 Schematic diagram of the working principle of an optical integrator;

[0020] Figure 7 Internal flow chart of the optical integrator.

[0021] In the diagram: 1-Integrator lens mount, 2-Lens clamping block, 3-Clamping screw, 4-First lens group, 5-Outlet pipe connector, 6-Inlet pipe connector, 7-Second lens group, 8-Cylindrical light transmission structure. Detailed Implementation

[0022] As attached Figure 1 To be continued Figure 7 As shown, an optical integrator suitable for a high-power solar simulator includes an integrator mirror mount 1, a lens clamping block 2, a clamping screw 3, a first mirror group 4, an outlet water pipe connector 5, an inlet water pipe connector 6, a second mirror group 7, and a cylindrical light-transmitting structure 8. The integrator mirror mount 1 has lens mounting holes on both ends, arranged in a honeycomb pattern, with each lens mounting hole corresponding to the other. A cylindrical light-transmitting structure 8 is provided between the corresponding lens mounting holes. The first mirror group 4 and the second mirror group 7 are installed parallel to each other on the lens mounting holes of the integrator mirror mount 1 and fixed by the lens clamping block 2 and the clamping screw 3. The outlet pipe connector 5 and the inlet pipe connector 6 are respectively located on the upper and lower sides of the integrator mirror mount 1, and the cooling medium flows inside the integrator mirror mount 1.

[0023] The cylindrical light-transmitting structure 8 is coaxial with the lens mounting hole; a gap is left between the two cylindrical light-transmitting structures 8, and the cooling medium flows in the gap.

[0024] The lens clamping block 2 is a hexagonal clamping block. Each lens is fixed by 3 lens clamping blocks 2, and each lens clamping block 2 can press 3 lenses with 3 sides.

[0025] The contact line between the lens clamping block 2 and the lens is curved, and the curvature is consistent with the curvature of the lens at the contact position.

[0026] The lens clamping block 2 is fixed by the clamping screw 3.

[0027] The integrator mirror mount 1 is integrally formed by 3D printing.

[0028] Working principle:

[0029] The solar simulator is affected by the structure of the lamp chamber and the array distribution, which causes the energy distribution of the system to be inconsistent at different locations within the irradiance plane of the light source, resulting in a distribution of higher irradiance in the center and lower irradiance around the periphery. Therefore, it is necessary to set up an optical integrator to obtain a highly uniform irradiance distribution within a certain range of the irradiance surface.

[0030] The optical integrator employs a compound eye lens structure, achieving uniform illumination while facilitating system miniaturization. An optical integrator typically contains two sets of compound eye lenses: a first lens group 4 and a second lens group 7. Non-uniform light is split into several fine beams after passing through the lenses of the first lens group 4. The lenses of the second lens group 7 are located on the focal plane of the first compound eye, acting as field lenses. Each lens unit of the second lens group 7 superimposes the corresponding lens unit of the first lens group 4 onto infinity. Because the entire broad beam of the light source is divided into multiple fine beams, the uniformity of each fine beam is better than that of the entire broad beam. Furthermore, the light spots of the fine beams at symmetrical positions superimpose, thus achieving uniform illumination on the illumination surface.

[0031] The cylindrical light-transmitting structure 8 inside the optical integrator serves as a channel for the cooling medium. The cooling medium flows in from the six water inlet pipe joints 6 at the bottom of the optical integrator and flows out from the three water outlet pipe joints 5 at the top of the optical integrator. The cooling medium carries away the solar simulator energy absorbed by the optical integrator, thereby achieving the purpose of heat dissipation for the optical integrator.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An optical integrator suitable for high-power solar simulators, characterized in that, The integrator mirror base (1), lens clamping block (2), clamping screw (3), first mirror group (4), water outlet pipe connector (5), water inlet pipe connector (6), second mirror group (7), and cylindrical light transmission structure (8) are provided on both ends of the integrator mirror base (1), which are arranged in a honeycomb pattern. The lens mounting holes on both ends correspond one-to-one. A cylindrical light transmission structure (8) is provided between the corresponding lens mounting holes. The first mirror group (4) and the second mirror group (7) are installed in parallel on the lens mounting holes of the integrator mirror base (1) and fixed by the lens clamping block (2) and clamping screw (3). The outlet pipe connector (5) and the inlet pipe connector (6) are respectively located on the upper and lower sides of the integrator mirror base (1). The cooling medium flows inside the integrator mirror base (1).

2. An optical integrator suitable for a high-power solar simulator according to claim 1, characterized in that, The cylindrical light-transmitting structure (8) is coaxial with the lens mounting hole; a gap is left between the two cylindrical light-transmitting structures (8), and the cooling medium flows in the gap.

3. An optical integrator suitable for a high-power solar simulator according to claim 1, characterized in that, The lens pressing block (2) is a hexagonal pressing block. Each lens is fixed by 3 lens pressing blocks (2), and each lens pressing block (2) can press 3 lenses with 3 sides.

4. An optical integrator suitable for a high-power solar simulator according to claim 1, characterized in that, The contact line between the lens pressing block (2) and the lens is a curve, and the curvature is consistent with the curvature of the lens at the contact position.

5. An optical integrator suitable for a high-power solar simulator according to claim 1, characterized in that, The lens clamp (2) is fixed by a clamping screw (3).

6. An optical integrator for a high-power solar simulator according to claim 1, wherein the integrator mirror mount (1) is integrally formed by 3D printing.

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