Optical integrator suitable for high-power solar simulator

Abstract

The utility model 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] The invention belongs to the technical field of optical element design, and more specifically is an optical integrator suitable for a high-power solar simulator. Background Art

[0002] The solar simulator is an optical energy transmission system, which is mainly used in aerospace, national defense, agriculture, ecological simulation and other fields. In actual use, in order to obtain a uniform irradiation surface, an integrator is usually used to homogenize the light beam. However, due to the high energy of the light beam emitted by the solar simulator light source, the temperature of the integrator will rise rapidly during operation. If the heat is not dissipated in time, the frame and lens will be deformed, thereby reducing the overall performance indicators of the solar simulator; or due to excessive energy, the lens temperature will rise sharply and the lens will shatter, resulting in the failure of the integrator function.

[0003] The existing integrator lens seats are all split-type, and the first lens group and the second lens group are respectively mounted on two integrator lens mounting plates. The heat dissipation structure is to process a cooling groove outside the area of ​​the lens mounting position on each integrator lens mounting plate, and then seal the cooling groove by welding or bolting to serve as a circulation channel for the cooling medium. The heat dissipation method is to pass the cooling medium into the cooling groove of the integrator lens mounting lens seat, and the cooling medium dissipates the heat of the integrator lens mounting plate and the lenses of the first lens group and the second lens group by heat conduction. The disadvantage of this method is that the optical integrator has very high requirements on the coaxiality, parallelism and spacing of the corresponding lenses between the first lens group and the second lens group. The split structure makes it difficult to ensure the positional relationship of the corresponding lenses in the first lens group and the second lens group, and the cooling medium channel is difficult to process, the heat dissipation area is small, the cooling medium energy transmission path is long, and the heat dissipation efficiency is low.

[0004] In order to solve these problems, an optical integrator suitable for a high power solar simulator is provided. Summary of the invention

[0005] The present invention provides an optical integrator suitable for a high-power solar simulator, which can solve the problems of poor coaxiality and parallelism of corresponding lenses between a first lens group and a second lens group, as well as the problems of difficult processing of a cooling medium channel, small heat dissipation area, long cooling medium energy transmission path, and low heat dissipation efficiency.

[0006] An optical integrator suitable for a high-power solar simulator comprises an integrator mirror seat, a lens pressing block, a clamping screw, a first lens group, a water outlet pipeline joint, a water inlet pipeline joint, a second lens group and a cylindrical light-transmitting structure. The two end surfaces of the integrator mirror seat are respectively provided with lens mounting holes arranged in a honeycomb shape. The lens mounting holes on the two end surfaces correspond to each other one by one. A cylindrical light-transmitting structure is provided between the corresponding lens mounting holes. The first lens group and the second lens group are parallelly mounted on the lens mounting holes of the integrator mirror seat and fixed by the lens pressing block and the clamping screw. The outlet pipeline joint and the inlet pipeline joint are respectively arranged on the upper and lower sides of the integrator mirror seat, and a cooling medium flows inside the integrator mirror seat.

[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 pressing block is a hexagonal pressing block, each lens is fixed by three lens pressing blocks, and each lens pressing block can press three lenses with three sides.

[0009] Furthermore, the contact edge line between the lens pressing block and the lens is a curve, and the curvature is consistent with the curvature of the lens at the contact position.

[0010] Furthermore, the lens pressing block is fixed by a pressing screw.

[0011] The integrator mirror base is integrally formed by 3D printing.

[0012] Beneficial effects:

[0013] The integrator mirror seat is an integrated structure, the cooling medium is evenly distributed between the two mirror groups, the energy transmission distance is short, and the heat dissipation area is greatly increased and the heat dissipation efficiency is improved, so that the overall performance indicators of the high-power solar simulator are guaranteed; when the heat load on the integrator frame is 20kw, the water cooling flow rate is 0.5m3 / h, and the flow rate is 0.3m / s, the highest temperature on the integrator is 40°, the lowest temperature is 35°, and the temperature distribution is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the main view;

[0015] Figure 2 Left view;

[0016] Figure 3 Rear view;

[0017] Figure 4 for Figure 2 Cross-section at MM;

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

[0019] Figure 6Working principle diagram of optical integrator;

[0020] Figure 7 State diagram of the internal process of the optical integrator.

[0021] In the figure: 1-integrator lens seat, 2-lens pressing block, 3-pressing screw, 4-first lens group, 5-export pipe joint, 6-inlet pipe joint, 7-second lens group, 8-columnar light-transmitting structure. DETAILED DESCRIPTION

[0022] As attached Figure 1 To Attachment Figure 7 As shown, an optical integrator suitable for a high-power solar simulator comprises an integrator mirror base 1, a lens pressing block 2, a clamping screw 3, a first lens group 4, a water outlet pipe joint 5, a water inlet pipe joint 6, a second lens group 7 and a cylindrical light-transmitting structure 8. Lens mounting holes are respectively arranged on both end surfaces of the integrator mirror base 1 in a honeycomb shape. The lens mounting holes on the two end surfaces correspond to each other one by one. A cylindrical light-transmitting structure 8 is provided between the corresponding lens mounting holes. The first lens group 4 and the second lens group 7 are parallelly mounted on the lens mounting holes of the integrator mirror base 1 and fixed by the lens pressing block 2 and the clamping screw 3. The outlet pipe joint 5 and the inlet pipe joint 6 are respectively arranged on the upper and lower sides of the integrator mirror base 1, and the cooling medium flows inside the integrator mirror base 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 pressing block 2 is a hexagonal pressing block. Each lens is fixed by three lens pressing blocks 2. At the same time, each lens pressing block 2 can press three lenses with three sides.

[0025] The contact edge 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.

[0026] The lens pressing block 2 is fixed by a pressing screw 3 .

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

[0028] Working principle:

[0029] The solar simulator is affected by the lamp house structure and array distribution, resulting in inconsistent energy distribution at different positions in the irradiation plane of the light source, forming an irradiance distribution with higher center and lower surrounding. Therefore, an optical integrator needs to be set to obtain highly uniform irradiance distribution on the irradiation surface within a certain range.

[0030] The optical integrator adopts the structure of a compound eye lens, which is conducive to the miniaturization of the system while achieving the effect of light homogenization. The optical integrator usually contains two groups of compound eye lenses, namely the first lens group 4 and the second lens group 7; the non-uniform light is divided into several thin beams after passing through the lens of the first lens group 4. The lens of the second lens group 7 is located on the focal plane of the front group of compound eyes, and acts as a field lens. Each of its lens units overlaps the lens unit corresponding to the first lens group 4 to form an image at infinity. Since the entire wide beam of the light source is divided into multiple thin beams for illumination, the uniformity of each thin beam is better than the uniformity of the entire wide beam, and the light spots of the thin beams at symmetrical positions overlap each other, thereby achieving uniform illumination on the illumination surface.

[0031] The cooling medium flow path is between the cylindrical light-passing structures 8 inside the optical integrator. 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 is used to take 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 present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical integrator suitable for a high power solar simulator, characterized in that: The invention comprises an integrator mirror seat (1), a lens pressing block (2), a clamping screw (3), a first lens group (4), a water outlet pipe joint (5), a water inlet pipe joint (6), a second lens group (7) and a columnar light-transmitting structure (8). The two end surfaces of the integrator mirror seat (1) are respectively provided with lens mounting holes arranged in a honeycomb shape. The lens mounting holes on the two end surfaces correspond to each other. A columnar light-transmitting structure (8) is provided between the corresponding lens mounting holes. The first lens group (4) and the second lens group (7) are parallelly mounted on the lens mounting holes of the integrator mirror seat (1) and fixed by means of the lens pressing block (2) and the clamping screw (3). The water outlet pipe joint (5) and the water inlet pipe joint (6) are respectively arranged on the upper and lower sides of the integrator mirror seat (1). A cooling medium flows inside the integrator mirror seat (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 a 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, and each lens is fixed by three lens pressing blocks (2). At the same time, each lens pressing block (2) can press three lenses with three sides.

4. An optical integrator suitable for a high power solar simulator according to claim 1, characterized in that: The contact edge 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. The optical integrator suitable for a high power solar simulator according to claim 1, characterized in that: The lens pressing block (2) is fixed by a pressing screw (3).

6. The optical integrator suitable for a high power solar simulator according to claim 1, characterized in that: The integrator mirror base (1) is integrally formed by 3D printing.

Images