A light source assembly and a solar simulator

Abstract

The application provides a light source assembly and a sunlight simulator. The light source assembly comprises a lamp tube, a reflector bowl, a lamp tube positioning ring, a lamp tube fixing seat, an insulating plate, a three-axis sliding table, a wind tube, a wind tube bottom plate, a heat dissipation fan and a wind pipe. The lamp tube has opposite head and tail portions. The reflector bowl has opposite center opening and center hole, and a reflection cavity is formed inside the reflector bowl. At least a part of the lamp tube is located in the reflection cavity, and the light emitting center of the lamp tube coincides with the geometric focal point of the reflector bowl. The head portion of the lamp tube is fixed at the center opening through the lamp tube positioning ring, and the tail portion of the lamp tube is connected to the insulating plate through the lamp tube fixing seat. The insulating plate is fixed on the three-axis sliding table, so that the lamp tube is adjusted in position through the three-axis sliding table. The hollow wind tube is installed at the center hole through the wind tube bottom plate, and at least a part of the lamp tube passes through the wind tube. The air outlet of the heat dissipation fan is sealingly connected to the side wall air inlet of the wind tube through the wind pipe, so that the cooling air flow is sequentially concentrated to the central heating area of the lamp tube through the wind pipe and the wind tube.

Description

Technical Field

[0001] This utility model relates to the field of sunlight simulation technology, and in particular to a light source component with precise adjustable lamp position and efficient directional heat dissipation capability, and a sunlight simulator equipped with the light source component. Background Technology

[0002] A AAA-grade solar simulator is a high-precision artificial light source system capable of accurately reproducing the standard solar spectrum (such as AM1.5G), ensuring spatial irradiance uniformity and temporal stability. It is widely used in scientific research and industrial testing fields such as photovoltaic cell efficiency calibration, photocatalytic reaction kinetics research, polymer material weather resistance assessment, and spacecraft surface coating aging testing. According to the International Electrotechnical Commission standard IEC 60904-9:2020, a AAA-grade solar simulator must meet Class A requirements in three core performance indicators: spectral matching degree, spatial irradiance uniformity, and temporal stability. Specifically, the matching error of each band within the 400–1100 nm spectrum is controlled between 0.75 and 1.25; the irradiance non-uniformity within the irradiated surface is ≤ ±2%; short-term instability (STI) is ≤ ±0.5%, and long-term instability is ≤ ±2%.

[0003] Currently, high-performance solar simulators mostly use xenon lamps or metal halide lamps as the main light source. Xenon lamps have a continuous and wide-ranging spectrum (200–2500 nm), especially in the visible light region where they closely match sunlight; metal halide lamps, on the other hand, have high luminous efficiency and a long lifespan, achieving a good balance between cost and performance. However, these two types of high-intensity gas discharge light sources generate a large amount of heat during operation. If heat dissipation is inadequate, it can not only cause spectral drift and power attenuation, but also potentially lead to thermal deformation of optical components, thereby compromising optical path stability and severely affecting the long-term operational reliability and AAA-level performance maintenance of the simulator.

[0004] Crucially, to achieve Class A spatial uniformity (i.e., irradiance non-uniformity ≤2%), the position of the light source in three-dimensional space must be extremely precise. Because the luminous arc size of xenon or metal halide lamps is tiny (typically only a few millimeters), even micron-level offsets relative to the homogenizing system (such as integrating spheres, fly-eye lenses, or homogenizing glass) can lead to an imbalance in the light spot distribution, resulting in significant differences in irradiance between the edge and center of the illuminated surface. Therefore, existing high-end simulators are generally equipped with a three-axis precision lamp adjustment mechanism to fine-tune the position of the light source in the X, Y, and Z directions to optimize the uniformity of the light field.

[0005] However, such mechanical adjustment structures are complex, calibration is time-consuming, and they are prone to displacement after equipment movement or long-term use, requiring frequent maintenance and recalibration, which increases the difficulty of operation and the cost of use.

[0006] In summary, achieving compact, long-term stable, and uniform illumination of both sides or large areas through reasonable thermal management design and light source positioning mechanism, while ensuring high spectral fidelity and time stability, has become a major challenge in the development of AAA-level solar simulator technology. Summary of the Invention

[0007] This utility model provides a light source component and a sunlight simulator, which aims to solve at least some of the defects of existing light source components in sunlight simulators.

[0008] In a first aspect, this utility model provides a light source assembly. The light source assembly is applied to a solar simulator and includes: A lamp tube having opposing head and tail portions in its axial direction; Reflector bowl, lamp positioning ring, lamp fixing seat, insulation board, three-axis slide table, air duct, air duct base plate, cooling fan and air duct; The reflector bowl has a central opening and a central hole in the direction of its optical axis, and a reflective cavity is formed inside the reflector bowl; At least a portion of the lamp tube is located within the reflective cavity of the reflector bowl, and the light-emitting center of the lamp tube coincides with the geometric focal point of the reflector bowl; The head of the lamp tube is fixed at the center of the reflector bowl by the lamp tube positioning ring, and the tail of the lamp tube is connected to the insulating plate by the lamp tube fixing seat. The insulating plate is fixed on the three-axis slide table so that the lamp tube can be adjusted in position by the three-axis slide table; The air duct is a hollow cylindrical structure. The air duct is installed at the center hole of the reflector bowl through the air duct base plate, and at least a portion of the lamp tube passes through the inside of the air duct. The air outlet of the cooling fan is sealed to the air inlet on the side wall of the air duct through the air pipe, so that the cooling airflow passes through the air pipe and the air duct in sequence and is concentrated and blown to the central heating area of ​​the lamp tube.

[0009] In some embodiments, the inner surface of the reflective bowl is coated with an optical film layer, and the optical film layer is any one of an aluminum film, a silver film, or a multilayer dielectric reflective film.

[0010] In some embodiments, the geometry of the inner surface of the reflector bowl is a rotationally symmetric conic surface, ellipsoidal surface, or composite aspherical surface.

[0011] In some embodiments, the lamp is a short-arc xenon lamp or a metal halide lamp.

[0012] In some embodiments, the insulating board is made of polyimide, alumina ceramic or aluminum nitride-based composite material, and the dielectric strength of the insulating board is not less than 20 kV / mm.

[0013] In some embodiments, the three-axis slide is used to adjust the spatial position of the lamp tube relative to the reflector bowl.

[0014] In some embodiments, the lamp positioning ring is made of stainless steel or ceramic.

[0015] In some embodiments, the duct base plate is made of mica plate, glass fiber reinforced epoxy resin or ceramic matrix composite material, and the duct base plate is used to block heat conduction.

[0016] In some embodiments, the duct is made of silicone, fiberglass cloth or metal corrugated pipe, and the duct can withstand temperatures of not less than 150°C.

[0017] Secondly, this utility model provides a sunlight simulator. The sunlight simulator includes: The simulator body and a pair of the aforementioned light source components disposed on the simulator body; The workpiece to be tested is placed on the main body of the simulator, and a pair of light source components are symmetrically arranged on opposite sides of the workpiece to be tested in its thickness direction, so that the solar simulator can perform synchronous irradiation testing on the workpiece to be tested.

[0018] At least one beneficial effect of the light source assembly and sunlight simulator provided in this embodiment of the present invention is as follows: The light source assembly includes a lamp tube, a reflector bowl, a lamp tube positioning ring, a lamp tube fixing seat, an insulating plate, a three-axis slide, a fan, a fan base, a cooling fan, and a fan duct; the light emission center of the lamp tube coincides with the geometric focal point of the reflector bowl, which enables the light source assembly to achieve efficient reflection; the head of the lamp tube is fixed to the center opening of the reflector bowl by the lamp tube positioning ring, and the tail of the lamp tube is connected to the insulating plate by the lamp tube fixing seat. The insulating plate is fixed to the three-axis slide, so that the position of the lamp tube can be adjusted by the three-axis slide. This design makes the position of the light source of the light source assembly adjustable; the fan duct is mounted on the fan base. The cooling fan outlet, located at the center hole of the reflector bowl, is sealed to the side wall air inlet of the air duct via a duct, allowing the cooling airflow to pass sequentially through the duct and air duct before being concentrated and blown onto the central heating area of ​​the lamp tube. This design enables the light source assembly to achieve directional forced air cooling. In summary, this light source assembly has the advantages of high-efficiency reflection, adjustable light source position, and excellent heat dissipation. These advantages effectively prevent light field instability caused by optical axis misalignment and irradiation instability, thereby improving the irradiation uniformity, time stability, and service life of the solar simulator equipped with this light source assembly. Consequently, the solar simulator equipped with this light source assembly is suitable for bifacial photovoltaic, photocatalysis, and material aging testing. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 A schematic diagram of the overall external structure of the light source assembly provided in an embodiment of this utility model; Figure 2 This is a cross-sectional schematic diagram of the light source assembly provided in an embodiment of the present utility model.

[0021] Attached reference numerals: 1. Lamp tube; 2. Reflector bowl; 3. Air duct; 4. Air duct base plate; 5. Lamp tube mounting bracket; 6. Insulating plate; 7. Three-axis slide table; 8. Cooling fan; 9. Air duct; 10. Lamp tube positioning ring. Detailed Implementation

[0022] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0023] It should be noted that, unless otherwise expressly specified and limited, the terms "internal," "external," "away from," etc., used in this specification to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features; thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature; "a plurality" or "several" means two or more; "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Please see Figure 1 and Figure 2 The light source assembly is used in a solar simulator and includes: lamp tube 1, reflector bowl 2, lamp tube positioning ring 10, lamp tube fixing seat 5, insulating plate 6, three-axis slide table 7, air duct 3, air duct base plate 4, cooling fan 8 and air duct 9.

[0025] The lamp tube 1, as the core light-emitting element of the light source assembly, can be used to emit a light beam; the lamp tube 1 has a head and a tail opposite each other in its axial direction.

[0026] In addition, the reflector bowl 2 has a central opening and a central hole in the direction of its optical axis, and a reflective cavity is formed inside the reflector bowl 2.

[0027] Furthermore, at least a portion of the lamp tube 1 is located within the reflective cavity of the reflector bowl 2.

[0028] Preferably, the light-emitting center of the lamp tube 1 (i.e., the physical center of the electric arc or filament) coincides with the geometric focal point of the reflector bowl 2, so as to ensure that the light beam emitted from the lamp tube 1 is reflected to form an approximately parallel outgoing beam or is focused to the maximum extent to form a highly collimated and uniform converging beam. This design can not only improve the light energy utilization rate, but also enable the light source component to obtain high irradiance uniformity and good spectral matching on the test plane of the solar simulator, thereby enabling the light source component to achieve efficient reflection.

[0029] It should be noted that the head of the lamp tube 1 is fixed to the center of the reflector bowl 2 by the lamp tube positioning ring 10, and the tail of the lamp tube 1 is connected to the insulating plate 6 by the lamp tube fixing seat 5.

[0030] It is understandable that the head of the lamp tube 1 is axially limited and radially centered by the lamp tube positioning ring 10. The lamp tube positioning ring 10 and the reflector bowl 2 achieve assembly datum unification through coaxial stop, positioning pin or reference surface, so that the central axis of the lamp tube 1 coincides with the optical axis of the reflector bowl 2. Such coaxial design can effectively suppress problems such as light spot offset, edge dark area or asymmetrical energy distribution caused by assembly deviation, thereby significantly improving the light field quality.

[0031] Specifically, the insulating plate 6 is fixed on the three-axis slide 7 so that the lamp tube 1 can be adjusted in position by the three-axis slide 7, thereby realizing micron-level precise adjustment of the lamp tube 1 in three degrees of freedom: X (horizontal transverse), Y (horizontal longitudinal) and Z (vertical direction). This ensures that the center of the optical path formed by the lamp tube 1 and the reflector bowl 2 coincides with the optical axis of the light source assembly, thereby suppressing light spot shift and energy distribution asymmetry.

[0032] In this embodiment of the application, the air duct 3 is a hollow cylindrical structure. The air duct 3 is installed at the center hole of the reflector bowl 2 through the bottom plate of the air duct 3, and at least a part of the lamp tube 1 passes through the inside of the air duct 3.

[0033] The air duct 3 not only serves as a structural transition component, but also constitutes the main channel for cooling airflow. Furthermore, the lower end of the air duct 3 is fixedly connected to the air duct base plate 4 by screws or clamps.

[0034] To further explain, the air outlet of the cooling fan 8 is sealed to the air inlet on the side wall of the air duct 3 through the air duct 9, so that the cooling airflow passes through the air duct 9 and the air duct 3 in sequence and is concentrated and blown to the central heating area of ​​the lamp tube 1. This enables the light source assembly to achieve directional forced air cooling. This design can control the surface temperature of the lamp tube 1 to <300℃, thereby effectively suppressing light decay.

[0035] In summary, this light source component has the advantages of high-efficiency reflection, adjustable light source position, and excellent heat dissipation. These advantages can effectively avoid light field instability caused by optical axis misalignment and irradiance instability. This design can significantly improve the irradiance uniformity (better than ±2%), time stability (maintaining short-term irradiance fluctuations ≤ ±0.5%, long-term drift ≤ ±2%), and service life (≥2000 hours) of the solar simulator equipped with this light source component. As a result, the solar simulator equipped with this light source component meets the IEC 60904-9 AAA level requirements, and thus makes the solar simulator equipped with this light source component suitable for bifacial photovoltaic, photocatalysis, and material aging testing.

[0036] In some embodiments, such as Figure 1and Figure 2 As shown, the inner surface of the reflective bowl 2 is coated with a high reflectivity optical film layer with a reflectivity of not less than 95%, and the optical film layer is any one of vacuum-deposited aluminum film, enhanced silver film, or multilayer dielectric reflective film.

[0037] In some embodiments, such as Figure 1 and Figure 2 As shown, the geometry of the inner surface of the reflector bowl 2 is preferably a rotationally symmetric conical surface. However, an ellipsoidal surface, a parabolic surface, or a composite aspherical surface can also be used according to specific light field distribution requirements to optimize the beam converging efficiency and outgoing collimation.

[0038] In some embodiments, such as Figure 1 and Figure 2 As shown, lamp 1 includes, but is not limited to, high-power short-arc xenon lamps, metal halide lamps, or other gas discharge light sources with continuous spectrum output capability.

[0039] In some embodiments, such as Figure 1 and Figure 2 As shown, the insulating plate 6 is made of polyimide, polyetheretherketone, alumina ceramic or aluminum nitride-based composite material, and the dielectric strength of the insulating plate 6 is not less than 20 kV / mm. The insulating plate also has a low coefficient of thermal expansion and thermal stability. This allows the insulating plate 6 to not only effectively isolate the electrical path between the high voltage circuit of the lamp tube 1 and the triaxial slide 7, preventing leakage or breakdown risks, but also maintain structural integrity under long-term high temperature radiation environment, thereby effectively avoiding optical axis deviation due to thermal deformation.

[0040] In some embodiments, such as Figure 1 and Figure 2 As shown, the three-axis slide 7 is used to adjust and calibrate the spatial position of the lamp tube 1 relative to the reflector bowl 2.

[0041] Specifically, the three-axis slide 7 has micron-level adjustment capability in three degrees of freedom: X (horizontal transverse), Y (horizontal longitudinal), and Z (vertical). The adjustment resolution of the three-axis slide 7 is 1–10 μm. Furthermore, the three-axis slide 7 supports manual (such as manual knob adjustment) or electric (such as integrated stepper motor drive) calibration. This adjustment mechanism is particularly suitable for focus overlap correction after lamp replacement or tolerance compensation for different lamp models, thereby ensuring that the best optical performance can be maintained after each assembly. This high-precision alignment capability is the key guarantee for achieving highly repeatable test results.

[0042] In some embodiments, such as Figure 1 and Figure 2 As shown, the lamp holder 5 is made of high-temperature resistant stainless steel or copper alloy, and the tail of the lamp tube 1 is mechanically positioned and the electrode is led out through the lamp holder 5.

[0043] Specifically, the lamp holder 5 integrates an electrode interface and a sealing structure to ensure the safety and airtightness of high-voltage power supply.

[0044] In some embodiments, such as Figure 1 and Figure 2 As shown, the lamp tube positioning ring 10 is made of heat-resistant stainless steel or engineering ceramic, and the inner hole of the lamp tube positioning ring 10 and the outer axial surface of the lamp tube 1 adopt a precision fit tolerance of H7 / g6 to ensure that the lamp tube 1 can remain centered when it is heated and expanded.

[0045] Specifically, H7 / g6 refers to a clearance fit under the hole-basis system (H indicates that the lower deviation of the hole is 0, while the upper deviation is positive; g indicates that the upper deviation of the shaft is negative, while the lower deviation is even smaller negative).

[0046] Specifically, the inner hole of the lamp tube positioning ring 10 adopts IT7 tolerance (the lower deviation of the inner hole of the lamp tube positioning ring 10 is 0), while the outer axial surface of the lamp tube 1 adopts IT6 tolerance.

[0047] In some embodiments, such as Figure 1 and Figure 2 As shown, the base plate of the air duct 3 is made of high-temperature resistant insulating materials such as mica board, glass fiber reinforced epoxy resin or ceramic matrix composite material. The base plate of the air duct 3 is used to block heat from being conducted to the lamp tube fixing seat 5, the insulating plate 6 and the three-axis slide table 7 (such as the guide rail, motor or control circuit of the three-axis slide table 7), so as to ensure that the insulating plate 6 will not have a decrease in insulation performance due to excessive temperature, and to ensure that the position adjustment accuracy of the three-axis slide table 7 will not decrease due to excessive temperature, that is, to prevent thermal drift from affecting the positioning accuracy or causing electronic component failure.

[0048] In some embodiments, such as Figure 1 and Figure 2 As shown, the duct 9 is made of silicone, fiberglass cloth or metal corrugated pipe, and the temperature resistance of the duct 9 is not lower than 150℃.

[0049] To achieve efficient active heat dissipation, this embodiment is equipped with a high-volume, low-noise cooling fan 8. The air outlet of the cooling fan 8 is connected to the air inlet on the side wall of the air duct 3 via a high-temperature resistant duct 9 made of silicone, fiberglass cloth, or metal corrugated pipe. The duct 9 must have good flexibility to accommodate assembly tolerances and withstand continuous thermal environments above 150°C. During operation, the cooling fan 8 starts, generating a high-speed directional airflow that flows sequentially through the duct 9, the air duct 3, and the central hole of the reflector bowl 2, finally concentrating on the central heating area of ​​the lamp tube 1 (such as the quartz shell, electrode sealing area, or near the arc area) to form a direct-blowing forced air cooling process. This direct-blowing forced air cooling path avoids the airflow dead zones of traditional lateral heat dissipation, significantly improving heat exchange efficiency.

[0050] In summary, the lamp tube 1, in cooperation with the three-axis slide 7 and the coaxial lamp tube positioning ring 10, achieves dynamic calibration and repeated positioning of the lamp tube 1 (i.e., the light source) and the reflector bowl 2 (i.e., the reflector). The light emission center of the lamp tube 1 is precisely aligned with the focal position of the reflector bowl 2 to ensure the collimation and irradiance uniformity of the beam. The integrated design of the cooling fan 8, the high-temperature resistant air duct 9, and the air duct 3 can form directional forced air cooling to ensure the reliability of thermal management and the long-term stability of the lamp tube 1 (i.e., the light source).

[0051] Please continue reading. Figure 1 and Figure 2 The solar simulator includes: a simulator body and a pair of the aforementioned light source components disposed on the simulator body.

[0052] It should be noted that the workpiece to be tested is placed on the main body of the simulator, and a pair of light source components are symmetrically arranged on opposite sides of the workpiece in the thickness direction, so that the solar simulator can perform synchronous irradiation tests on the workpiece.

[0053] It is understandable that the workpiece under test is a bifacial photovoltaic device (such as a crystalline silicon cell, a perovskite cell, or a bifacial module).

[0054] Specifically, the solar simulator equipped with this light source component is suitable for scientific research and industrial applications requiring artificial sunlight environments with high stability, high uniformity, and high spectral matching. These applications include, but are not limited to, scientific research and industrial testing scenarios with extremely stringent requirements for light source stability, spectral accuracy, and irradiance controllability, such as photoelectric performance testing of bifacial photovoltaic devices (e.g., crystalline silicon cells, perovskite cells, bifacial modules), accelerated testing of material weather resistance and aging, photocatalytic reaction research, and ground environment simulation of solar panels for aerospace vehicles. Examples include independent or simultaneous testing of the front / back sides of bifacial photovoltaic cells, weak light response analysis of perovskite / tandem cells, quantum efficiency determination of photocatalytic materials, and accelerated aging testing of polymer coatings.

[0055] To further explain, this light source assembly effectively solves the problems of optical axis misalignment (i.e., unstable light output), focal misalignment, irradiance drift (i.e., uneven irradiance), and decreased spectral stability caused by thermal drift (or thermal expansion), assembly tolerance (or mechanical tolerance), or focal point misalignment of the lamp tube 1. It combines efficient reflection (setting the light emission center of lamp tube 1 to coincide with the geometric focal point of reflector bowl 2 to achieve efficient reflection), adjustable position (the three-axis slide table 7 provides micron-level adjustment of lamp tube 1 in three degrees of freedom: X (horizontal), Y (horizontal), and Z (vertical) directions) with forced air cooling (the cooling fan 8, air duct 3, air duct base plate 4, and air duct 9 form a direct air cooling method). This significantly improves the overall performance and long-term operational reliability of the solar simulator by combining these features.

[0056] In some embodiments, such as Figure 1 and Figure 2 As shown, lamp tube 1 can also be replaced with a high-power LED array or laser-excited fluorescent light source to achieve a longer lifespan or specific spectrum customization. The surface shape of reflector bowl 2 can also be optimized into a freeform surface to generate a specific non-uniform light field (such as simulating dawn and dusk lighting). At the same time, the light source assembly can also add guide vanes or eddy current generators in the air duct 3 to improve cooling uniformity. Furthermore, the light source assembly can also integrate a displacement sensor and an automatic feedback control module on the three-axis slide table 7 to achieve closed-loop self-calibration of the light source position (i.e., the position of lamp tube 1). Moreover, the light source assembly can also add a spectrometer or radiometer probe to build an intelligent light source platform for real-time monitoring and dynamic compensation.

[0057] In summary, the light source assembly and sunlight simulator provided by this utility model embodiment include a lamp tube, a reflector bowl, a lamp tube positioning ring, a lamp tube mounting base, an insulating plate, a three-axis slide, a fan, a fan base plate, a cooling fan, and a duct. The light-emitting center of the lamp tube coincides with the geometric focal point of the reflector bowl, a design that enables the light source assembly to achieve efficient reflection. The head of the lamp tube is fixed to the center opening of the reflector bowl via the lamp tube positioning ring, and the tail of the lamp tube is connected to the insulating plate via the lamp tube mounting base. The insulating plate is fixed to the three-axis slide, allowing the lamp tube to be adjusted in position via the three-axis slide. This design makes the light source position of the light source assembly adjustable. The fan is mounted on the reflector bowl via the fan base plate. At the center hole of the light bowl, the air outlet of the cooling fan is sealed to the air inlet on the side wall of the air duct through the air pipe, so that the cooling airflow passes through the air pipe and the air duct in sequence and is concentrated to blow onto the central heating area of ​​the lamp tube. This design enables the light source component to achieve directional forced air cooling. In summary, the light source component has the advantages of high efficiency reflection, adjustable light source position and excellent heat dissipation. These advantages can effectively avoid the light field instability caused by optical axis deviation and irradiation instability of the light source component, thereby improving the irradiation uniformity, time stability and service life of the solar simulator equipped with this light source component. As a result, the solar simulator equipped with this light source component is suitable for bifacial photovoltaic, photocatalysis and material aging testing.

[0058] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A light source assembly for use in a solar simulator, characterized in that, include: A lamp tube having opposing head and tail portions in its axial direction; Reflector bowl, lamp positioning ring, lamp fixing seat, insulation board, three-axis slide table, air duct, air duct base plate, cooling fan and air duct; The reflector bowl has a central opening and a central hole in the direction of its optical axis, and a reflective cavity is formed inside the reflector bowl; At least a portion of the lamp tube is located within the reflective cavity of the reflector bowl, and the light-emitting center of the lamp tube coincides with the geometric focal point of the reflector bowl; The head of the lamp tube is fixed at the center of the reflector bowl by the lamp tube positioning ring, and the tail of the lamp tube is connected to the insulating plate by the lamp tube fixing seat. The insulating plate is fixed on the three-axis slide table so that the lamp tube can be adjusted in position by the three-axis slide table; The air duct is a hollow cylindrical structure. The air duct is installed at the center hole of the reflector bowl through the air duct base plate, and at least a portion of the lamp tube passes through the inside of the air duct. The air outlet of the cooling fan is sealed to the air inlet on the side wall of the air duct through the air pipe, so that the cooling airflow passes through the air pipe and the air duct in sequence and is concentrated and blown to the central heating area of ​​the lamp tube.

2. The light source assembly according to claim 1, characterized in that, The inner surface of the reflective bowl is coated with an optical film layer, and the optical film layer is any one of aluminum film, silver film or multilayer dielectric reflective film.

3. The light source assembly according to claim 1, characterized in that, The inner surface of the reflector bowl has a rotationally symmetric conic surface, ellipsoidal surface, or composite aspherical surface geometry.

4. The light source assembly according to claim 1, characterized in that, The lamp is a short-arc xenon lamp or a metal halide lamp.

5. The light source assembly according to claim 1, characterized in that, The insulating board is made of polyimide, alumina ceramic or aluminum nitride-based composite material, and the dielectric strength of the insulating board is not less than 20 kV / mm.

6. The light source assembly according to claim 1, characterized in that, The three-axis slide is used to adjust the spatial position of the lamp tube relative to the reflector bowl.

7. The light source assembly according to claim 1, characterized in that, The lamp tube positioning ring is made of stainless steel or ceramic.

8. The light source assembly according to claim 1, characterized in that, The bottom plate of the air duct is made of mica board, glass fiber reinforced epoxy resin or ceramic matrix composite material, and the bottom plate of the air duct is used to block heat conduction.

9. The light source assembly according to claim 1, characterized in that, The duct is made of silicone, fiberglass cloth or metal corrugated pipe, and the duct can withstand a temperature of not less than 150°C.

10. A sunlight simulator, characterized in that, include: The simulator body and a pair of light source components as described in any one of claims 1-9 disposed on the simulator body; The workpiece to be tested is placed on the main body of the simulator, and a pair of light source components are symmetrically arranged on opposite sides of the workpiece to be tested in its thickness direction, so that the solar simulator can perform synchronous irradiation testing on the workpiece to be tested.

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