A solar simulator for testing the electrical performance of solar cells and its adjustment method

Abstract

The present application provides a solar simulator for testing the electrical performance of solar cells for space use, comprising: a xenon lamp and an AM0 base filter covering the xenon lamp, for matching the AM0 spectrum, wherein the AM0 spectrum is divided into N bands, where N is greater than or equal to 3; N‑1 movable filters, respectively for attenuating the irradiance of the N‑1 bands, each movable filter being constructed to block a portion of the light-emitting surface of the xenon lamp, and each movable filter being capable of moving independently relative to the xenon lamp, thereby changing the blocked area of the light-emitting surface of the xenon lamp blocked by each movable filter; N‑2 fill lights, for supplementing the irradiance of the N‑2 bands of the AM0 spectrum; and a power supply system for separately controlling the irradiance of the xenon lamp and the fill light.

Description

Technical Field

[0001] The present application as a whole relates to a solar simulator for testing the electrical performance of solar cells, and in particular to a solar simulator for testing the electrical performance of multi-junction gallium arsenide solar cells having different absorption characteristics for light energy in different wavelength bands. Background Art

[0002] In spacecraft design, the electrical performance of multi-junction GaAs solar cells for space use requires accurate ground-based testing to provide an accurate basis for spacecraft power supply and distribution design. A solar simulator capable of accurately measuring the electrical performance of multi-junction GaAs solar cells must feature multiple, independently adjustable spectral irradiance levels. This allows the spectral irradiance to be adjusted based on the short-circuit current of each standard cell, achieving the AM0 standard spectral conditions required for accurate testing of the solar cell or solar cell module under test. Summary of the Invention

[0003] Currently, the mainstream solar cells used in spacecraft are multi-junction gallium arsenide solar cells. Due to the complex sunlight spectrum absorption characteristics of multi-junction solar cells, if the solar simulator used in ground testing has the ability to independently adjust the spectral irradiance in multiple segments, it can more accurately measure the electrical performance of the solar cell under test, providing an important basis for the power supply and distribution design of the spacecraft. At the same time, it is necessary to simplify the design and reduce energy consumption as much as possible. To address this problem, this application proposes a solar simulator for testing the electrical performance of solar cells and a multi-segment spectral irradiance adjustment method thereof.

[0004] The present application provides a solar simulator for testing the electrical performance of space solar cells, comprising:

[0005] A xenon lamp and an AM0 base filter covering the xenon lamp, used to match the AM0 spectrum, wherein the AM0 spectrum is divided into N bands, where N is greater than or equal to 3;

[0006] N-1 movable filters, respectively used to attenuate irradiance in N-1 wavelength bands, each movable filter being configured to block a portion of a light-emitting surface of the xenon lamp, and each movable filter being independently movable relative to the xenon lamp, thereby varying an area of the light-emitting surface of the xenon lamp blocked by each movable filter;

[0007] N-2 fill lights, used to supplement the irradiance of N-2 bands of the AM0 spectrum;

[0008] The power supply system is used to control the irradiance of the xenon lamp and the fill light respectively.

[0009] According to the solar simulator provided by the present application, the movable filter is wedge-shaped, having a first edge and a second edge extending along the axial direction, the first edge and the second edge are inclined relative to the axial direction, and the movable filter can move axially relative to the xenon lamp.

[0010] According to the solar simulator provided by the present application, the movable filter is in the shape of an isosceles triangle.

[0011] According to the solar simulator provided in the present application, wherein N is equal to 3, the AM0 spectrum is divided into a short-wave band, a medium-wave band, and a long-wave band, the first movable filter is used to attenuate the irradiance of the medium-wave band, the second movable filter is used to attenuate the irradiance of the long-wave band, and the fill light is used to supplement the irradiance of the long-wave band.

[0012] According to the solar simulator provided in the present application, wherein N is equal to 4, the AM0 spectrum is divided into a first band, a second band, a third band, and a fourth band in ascending order of wavelength value, the first movable filter is used to attenuate the irradiance of the second band, the second movable filter is used to attenuate the irradiance of the third band, the third movable filter is used to attenuate the irradiance of the fourth band, the first fill light is used to supplement the irradiance of the third band, and the second fill light is used to supplement the irradiance of the fourth band.

[0013] According to the solar simulator provided by the present application, the movable filter is rectangular, and the moving direction of the movable filter is perpendicular to the extending direction of the xenon lamp tube.

[0014] According to the solar simulator provided by the present application, the fill light is a halogen lamp or an LED lamp.

[0015] The present application also provides a method for adjusting a solar simulator spectrum, the adjustment method comprising:

[0016] S1: by adjusting the brightness of the xenon lamp, the irradiance of the first band in the spectrum of the solar simulator matches the first band of the AM0 spectrum;

[0017] S2: adjusting the shielding area by controlling the movement of the first movable filter, thereby adjusting the irradiance of the second wavelength band of the solar simulator spectrum, so that the irradiance of the second wavelength band of the solar simulator spectrum matches the irradiance of the second wavelength band of the AM0 spectrum;

[0018] S3: by controlling the second movable filter and the first fill light, the irradiance of the third band of the output spectrum of the solar simulator is matched with the irradiance of the third band of the AM0 spectrum.

[0019] According to one embodiment of the present application, the following steps are further included:

[0020] S4: by controlling the N-1th movable filter and the N-2th fill light, the irradiance of the fourth band of the output spectrum of the solar simulator is matched with the irradiance of the fourth band of the AM0 spectrum.

[0021] According to one embodiment of the present application, after the irradiance of the nth band of the output spectrum of the solar simulator is matched to the irradiance of the nth band of the AM0 spectrum, the following steps are further included:

[0022] Confirm whether the irradiance of the first to n-1th bands of the output spectrum of the solar simulator still matches the irradiance of the first to n-1th bands of the AM0 spectrum. If not, then make the irradiance of the first to n-1th bands of the output spectrum of the solar simulator match the irradiance of the first to n-1th bands of the AM0 spectrum in sequence.

[0023] Wherein, n is greater than or equal to 2, and n is less than or equal to N.

[0024] In the pulse solar simulator provided in the present application, N segments of the spectrum can be independently adjusted, so that the spectrum of the solar simulator matches the AM0 spectrum. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following will further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present application in a clear and understandable manner through the description of preferred embodiments and in conjunction with the accompanying drawings. The following drawings are intended only to illustrate and explain the present application and do not limit the scope of the present application. Among them:

[0026] Figure 1 A schematic diagram of a solar simulator light source system lamp and a filter according to an embodiment of the present application is shown.

[0027] Figure 2a-2c FIG. 4 shows the movement of the first optical filter relative to the xenon lamp in an embodiment according to the present application. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of this application, the specific implementation methods of this application are now described with reference to the accompanying drawings.

[0029] Currently, existing space solar simulators use three sets of light sources, each corresponding to the response spectrum of the top, middle, and bottom subcells of a triple-junction gallium arsenide solar cell. These light sources are controlled by three power supplies, and their brightness is controlled by controlling the power of each power supply. This allows the solar simulator's spectrum to simulate the AM0 spectrum and adjust the irradiance. However, this solution is only suitable for regulating steady-state solar simulators within a small illumination area and cannot be applied to large-scale pulsed solar simulators.

[0030] In a solar simulator provided by one embodiment of the present application, independent and continuous adjustment between three spectrum segments is achieved through two independent lamps: a xenon lamp and a fill light. Specifically, while the brightness of the xenon lamp and the fill light can be independently adjusted, a first attenuation filter and a second attenuation filter are inserted in front of the xenon lamp to attenuate the irradiance in the mid-wavelength band (primarily in the 760nm-950nm band) and the long-wavelength band (primarily in the 950nm-1800nm band) of the xenon lamp spectrum, respectively. By controlling the relative positions of the first attenuation filter, the second attenuation filter, and the xenon lamp, the area of the xenon lamp covered by the two attenuation filters can be controlled, thereby adjusting the degree of attenuation of light in the mid-wavelength band and the long-wavelength band, thereby achieving independent adjustment between the three spectrum segments of the xenon lamp. In addition, due to the spectral characteristics of the xenon lamp itself, in some cases, when the irradiance of the xenon lamp's short-wavelength band can match the irradiance of the short-wavelength band of the AM0 spectrum, the irradiance of the xenon lamp's longer-wavelength band is often too low to match the irradiance of the long-wavelength band of the AM0 spectrum. Therefore, the present application adopts the method of supplementary light to supplement the spectrum of xenon lamp, especially the spectral irradiance in the longer wavelength band.

[0031] The solar simulator provided in this application can simulate the AM0 spectrum and adjust irradiance, thereby enabling accurate testing of solar cell modules. The system features a simple structure, high reliability, and high precision. These features make the solar simulator suitable for measuring the electrical performance of satellite solar cells or solar cell modules, and are applicable to the acceptance, testing, development, and design of satellite solar arrays.

[0032] The following describes a solar simulator light source system according to an embodiment of the present application with reference to the accompanying drawings. Figure 1 As shown, it shows a solar simulator provided according to an embodiment of the present application, comprising:

[0033] Xenon lamp 2, used to match the irradiance of the short-wavelength band (350nm-760nm) of the AM0 spectrum. Xenon lamp 2 can be, for example, a long-arc xenon lamp, comprising a lamp tube 21 and a lamp holder 22, wherein lamp tube 21 is placed within lamp holder 22. Lamp holder 22 has an opening covered with a fixed AM0 base filter. Light emitted by lamp tube 21 passes through the opening of lamp holder 22 and through the base filter to exit xenon lamp 2. The opening of lamp holder 22 defines the light exit surface of xenon lamp 2.

[0034] The first filter 3 is wedge-shaped and is used to attenuate the irradiance in the mid-wave band (760nm-950nm). The first filter 3 has an axial direction (Z), and has a first edge and a second edge extending along the axial direction, and the first edge and the second edge are inclined relative to the axial direction. The first filter 3 is configured to block a portion of the light-emitting surface of the xenon lamp 2, and this portion is referred to as the blocking area. Figures 2a to 2cAs shown, the first filter 3 can move relative to the xenon lamp 2 along the axial direction, as shown in FIG. Figure 2b and Figure 2c As shown by the arrow in . Since the first edge and the second edge of the first filter 3 are inclined relative to the axial direction, the above-mentioned shielding area can change as the first filter 3 moves. By increasing the above-mentioned shielding area, the irradiance of the mid-wavelength band of the light emitted by the xenon lamp 2 can be attenuated more, and by reducing the above-mentioned shielding area, the irradiance of the mid-wavelength band of the light emitted by the xenon lamp 2 can be attenuated less. Therefore, by controlling the movement of the first filter 3, the irradiance of the mid-wavelength band of the solar simulator spectrum can be adjusted;

[0035] The second filter 4 is rectangular and is used to attenuate the irradiance in the long-wavelength band (950nm-1800nm). Like the first filter 3, the second filter 4 has an axial direction and is constructed to block a portion of the light-emitting surface of the xenon lamp 2. It is movable and, similar to the first filter 3, can change the blocked area of the xenon lamp 2 to increase or decrease the attenuation of the long-wavelength irradiance. Therefore, by controlling the movement of the second filter 4, the irradiance in the long-wavelength band of the solar simulator spectrum can be adjusted.

[0036] Fill light 1 is used to supplement the long-wavelength band (950nm-1800nm) when the irradiance of the long-wavelength band of the spectrum is too weak compared to the AM0 spectrum. In this embodiment, the fill light 1 is composed of a halogen lamp, which filters the light and leaves the long-wavelength band (950nm-1800nm);

[0037] The power supply system is used to provide power to the xenon lamp 2 and the fill light 1, and to control the brightness of the xenon lamp 2 and the fill light 1 respectively;

[0038] The control device is used to control the movement of the first filter 3 and the second filter 4.

[0039] In one embodiment of the present application, the first filter 3 is in the shape of an isosceles triangle with an acute apex angle. The control device may be, for example, a stepper motor, and the base of the isosceles triangle may serve as a propulsion edge of the stepper motor.

[0040] In one embodiment of the present application, the number of xenon lamps 2 and fill light lamps 1 can be adjusted according to actual needs.

[0041] In one embodiment of the present application, the xenon lamp 2 may have a fixed AM0 basic filter for preliminary adjustment of the xenon lamp spectrum to the AM0 spectrum.

[0042] In one embodiment of the present application, the fill light is a halogen lamp. Other types of light sources may also be used as the fill light depending on the specific wavelength band required for fill light.

[0043] According to one embodiment of the present application, a method for adjusting the spectrum of the solar simulator is provided, comprising the following steps:

[0044] S1: Light up the xenon lamp 2 and adjust the brightness of the xenon lamp 2 so that the irradiance of the short-wave band (350nm-760nm) in the spectrum of the solar simulator matches the irradiance of the short-wave band of the AM0 spectrum;

[0045] S2: Controlling the movement of the first filter 3 by the control device to adjust the shielding area of the light-emitting surface of the xenon lamp 2 blocked by the first filter 3, thereby adjusting the irradiance of the mid-wavelength band (760nm-950nm) of the solar simulator spectrum, so that the irradiance of the mid-wavelength band of the output spectrum of the solar simulator matches the irradiance of the mid-wavelength band of the AM0 spectrum;

[0046] S3: The irradiance of the long-wavelength band of the output spectrum of the solar simulator is matched to the irradiance of the long-wavelength band of the AM0 spectrum by controlling the second filter 4 and the fill light 1. The specific steps include: if the irradiance of the long-wavelength band of the output spectrum of the solar simulator is higher than the irradiance of the long-wavelength band of the AM0 spectrum, then the light output surface of the xenon lamp 2 is blocked by the second filter 4 by controlling the movement of the second filter 4, thereby reducing the irradiance of the long-wavelength band of the solar simulator's spectrum, thereby matching the irradiance of the long-wavelength band of the AM0 spectrum; if the irradiance of the long-wavelength band of the output spectrum of the solar simulator is lower than the irradiance of the long-wavelength band of the AM0 spectrum, then lighting the fill light 1 and adjusting the power of the fill light 1, thereby increasing the irradiance of the long-wavelength band of the solar simulator's spectrum, thereby matching the irradiance of the long-wavelength band of the AM0 spectrum.

[0047] In the solar simulator provided according to one embodiment of the present application, by setting a movable first attenuation filter 3 and a second attenuation filter 4, as well as a long-waveband fill light 1, independent adjustment between the three spectrums of the solar simulator can be achieved, so that the spectrum of the solar simulator is matched to the AM0 spectrum.

[0048] According to one embodiment of the present application, a solar simulator and spectrum adjustment method thereof are provided, wherein the spectrum of the solar simulator is adjusted using standard sub-cells. The short-wavelength band of xenon lamp 2, the medium-wavelength band of xenon lamp 2, and the long-wavelength band of xenon lamp 2 correspond to the top, middle, and bottom triple-junction standard sub-cells, respectively.

[0049] Ideally, the filter can achieve transmission of only some bands and completely cut off other bands. However, in reality, no filter can completely cut off without affecting the energy of other spectral bands. Therefore, in practical applications, especially when high matching accuracy is required, the solar simulator spectrum adjustment method provided in the present application requires repeated iterative approximation to ultimately achieve high-precision matching between the solar simulator spectrum and the AM0 spectrum. The solar simulator high-precision spectrum adjustment method provided in accordance with one embodiment of the present application includes:

[0050] S1: Light up the xenon lamp 2 and adjust the brightness of the xenon lamp 2 so that the irradiance of the short-wave band (350nm-760nm) in the spectrum of the solar simulator matches the irradiance of the short-wave band of the AM0 spectrum;

[0051] S2: Controlling the movement of the first optical filter 3 by the control device to adjust the area of the light-emitting surface of the xenon lamp 2 blocked by the first optical filter 3, thereby adjusting the irradiance of the mid-wavelength band (760nm-950nm) of the solar simulator's spectrum, so that the irradiance of the mid-wavelength band of the solar simulator's output spectrum matches the irradiance of the mid-wavelength band of the AM0 spectrum. Since the first optical filter 3 may slightly attenuate the irradiance of the short-wavelength band under non-ideal conditions, it is necessary to confirm whether the irradiance of the short-wavelength band still matches the irradiance of the short-wavelength band of the AM0 spectrum;

[0052] S3: confirm whether the irradiance of the short-wave band still matches the irradiance of the short-wave band of the AM0 spectrum. If so, proceed to step S4; if not, repeat steps S1-S2 until the irradiances of the short-wave band and the medium-wave band both match the irradiances of the short-wave band and the medium-wave band of the AM0 spectrum, that is, by repeatedly adjusting the power of the xenon lamp 2 and the position of the first filter 3, the irradiances of the short-wave band and the medium-wave band in the spectrum of the solar simulator are respectively matched to the irradiances of the short-wave band and the medium-wave band of the AM0 spectrum;

[0053] S4: The irradiance of the long-wavelength band of the output spectrum of the solar simulator is matched to the irradiance of the long-wavelength band of the AM0 spectrum by controlling the second filter 4 and the fill light 1. The specific steps include: if the irradiance of the long-wavelength band of the output spectrum of the solar simulator is higher than the irradiance of the long-wavelength band of the AM0 spectrum, then the light output surface of the xenon lamp 2 is blocked by the second filter 4 by controlling the movement of the second filter 4, thereby reducing the irradiance of the long-wavelength band of the solar simulator's spectrum, thereby matching the irradiance of the long-wavelength band of the AM0 spectrum; if the irradiance of the long-wavelength band of the output spectrum of the solar simulator is lower than the irradiance of the long-wavelength band of the AM0 spectrum, then lighting the fill light 1 and adjusting the power of the fill light 1, thereby increasing the irradiance of the long-wavelength band of the solar simulator's spectrum, thereby matching the irradiance of the long-wavelength band of the AM0 spectrum;

[0054] S5: Confirm whether the irradiance of the short-wave band and the medium-wave band still match the irradiance of the short-wave band and the medium-wave band of the AM0 spectrum. If they match, proceed to step S6; if not, repeat steps S1-S4 until the irradiance of the short-wave band, the medium-wave band and the long-wave band all match the irradiance of the short-wave band, the medium-wave band and the long-wave band of the AM0 spectrum, that is, by repeatedly adjusting the power of the xenon lamp 2 and the position of the first filter 3 and the second filter 4, the irradiance of the short-wave band, the medium-wave band and the long-wave band in the spectrum of the solar simulator are respectively matched with the irradiance of the short-wave band, the medium-wave band and the long-wave band of the AM0 spectrum.

[0055] S6: Adjustment completed.

[0056] According to one embodiment of the present application, the ranges of the mid-wave band, the medium-wave band, and the long-wave band are not limited to 350nm-760nm, 760nm-950nm, and 950nm-1800nm. In actual use, the ranges of the short-wave band, the mid-wave band, and the long-wave band can be adjusted according to the response spectrum ranges of the top, middle, and bottom sub-cells of the solar cell to be tested.

[0057] In another embodiment of the present application, the AM0 spectrum can be divided into more than three bands. For example, the AM0 spectrum can be divided into N bands, where N is 4, 5, or 6. Accordingly, when the AM0 spectrum is divided into N bands, N-1 movable filters and N-2 fill lights are provided in the solar simulator light source system, thereby achieving independent and continuous adjustment between the N bands of the spectrum.

[0058] For example, in one embodiment, the AM0 spectrum can be divided into four bands, which are arranged in order from small to large wavelength values, namely the first band, the second band, the third band and the fourth band. Three movable filters are set in the solar simulator light source system, namely the first filter, the second filter and the third filter. The first filter, the second filter and the third filter can be wedge-shaped. The first filter, the second filter and the third filter are used to attenuate the irradiance of the second band, the third band and the fourth band respectively. By controlling the movement of the first filter, the blocking area of the first filter can be adjusted, thereby adjusting the irradiance of the second band of the solar simulator spectrum. By controlling the movement of the second filter, the blocking area of the second filter can be adjusted, thereby adjusting the irradiance of the third band of the solar simulator spectrum. By adjusting the third filter, the blocking area of the third filter can be adjusted, thereby adjusting the irradiance of the fourth band of the solar simulator spectrum.

[0059] Two fill-in lights are provided in the solar simulator light source system, namely a first fill-in light and a second fill-in light, wherein the first fill-in light is used to supplement the third wavelength band, and the second fill-in light is used to supplement the fourth wavelength band.

[0060] The adjustment method of the solar simulator light source system provided in this embodiment includes the following steps:

[0061] S1: Light up the xenon lamp and adjust the brightness of the xenon lamp so that the irradiance of the first band in the spectrum of the solar simulator matches the irradiance of the first band in the AM0 spectrum;

[0062] S2: controlling the movement of the first filter by the control device to adjust the shielding area of the light-emitting surface of the xenon lamp blocked by the first filter, thereby adjusting the irradiance of the second wavelength band of the solar simulator spectrum, so that the irradiance of the second wavelength band of the output spectrum of the solar simulator matches the irradiance of the second wavelength band of the AM0 spectrum;

[0063] S3: controlling the second filter and the first fill light through the control device so that the irradiance of the third band of the output spectrum of the solar simulator matches the irradiance of the third band of the AM0 spectrum;

[0064] S4: controlling the third filter and the second fill light through the control device so that the irradiance of the fourth band of the output spectrum of the solar simulator matches the irradiance of the fourth band of the AM0 spectrum.

[0065] In a solar simulator provided according to one embodiment of the present application, the irradiance of a particular wavelength band of the solar simulator is reduced or increased by combining a filter and a fill light in that wavelength band, thereby adjusting the irradiance of that wavelength band to match the irradiance of that wavelength band of the AM0 spectrum. For example, in the above embodiment, the irradiance of the third wavelength band of the solar simulator is adjusted by combining the second filter and the first fill light; and the irradiance of the fourth wavelength band of the solar simulator is adjusted by combining the third filter and the second fill light.

[0066] According to one embodiment of the present application, a high-precision spectrum adjustment method for a solar simulator is also provided, comprising:

[0067] S1: Light up the xenon lamp and adjust the brightness of the xenon lamp so that the irradiance of the first band in the spectrum of the solar simulator matches the irradiance of the first band in the AM0 spectrum;

[0068] S2: Controlling the movement of the first filter to adjust the shielding area of the light-emitting surface of the xenon lamp blocked by the first filter, so that the irradiance of the second band of the output spectrum of the solar simulator matches the irradiance of the second band of the AM0 spectrum;

[0069] S3: Confirm whether the irradiance of the first band still matches the irradiance of the first band of the AM0 spectrum. If so, proceed to step S4; if not, repeat steps S1-S2 until the irradiance of the first band and the second band both match the irradiance of the short band and the medium band of the AM0 spectrum.

[0070] S4: controlling the second filter and the first fill light so that the irradiance of the third band of the output spectrum of the solar simulator matches the irradiance of the third band of the AM0 spectrum;

[0071] S5: Confirm whether the irradiance of the first band and the second band still match the irradiance of the first band and the second band of the AM0 spectrum. If they match, proceed to step S6; if not, repeat steps S1-S4 until the irradiance of the first band, the second band, and the third band all match the irradiance of the first band, the second band, and the third band of the AM0 spectrum.

[0072] S6: Adjustment completed.

[0073] It can be seen that when the AM0 spectrum is divided into N bands (N is greater than or equal to 3), N-1 movable filters are set in the solar simulator light source system, and N-2 fill lights are set. In the high-precision spectrum adjustment method of the solar simulator provided by this embodiment, the xenon lamp and the first filter are first used to match the irradiance of the first band and the second band of the output spectrum of the solar simulator to the irradiance of the first band and the second band of the AM0 spectrum.

[0074] Then, use the second filter and the first fill light to match the irradiance of the third band of the output spectrum of the solar simulator with the irradiance of the third band of the AM0 spectrum, and confirm whether the irradiance of the first band and the second band of the output spectrum of the solar simulator both match the irradiance of the first band and the second band of the AM0 spectrum.

[0075] If both are matched, the third filter and the second fill light are used to match the irradiance of the fourth band of the solar simulator's output spectrum to the irradiance of the fourth band of the AM0 spectrum. If they are not matched, the above method is used to sequentially match the irradiance of the first to third bands to the irradiance of the first to third bands of the AM0 spectrum.

[0076] Then, continue using the third filter and the second fill light to match the irradiance of the fourth band of the solar simulator's output spectrum with the irradiance of the fourth band of the AM0 spectrum, and confirm whether the irradiance of the first to third bands of the solar simulator's output spectrum all matches the irradiance of the first to third bands of the AM0 spectrum. If they all match, continue using the next filter and the next fill light to match the irradiance of the fourth band of the solar simulator's output spectrum with the irradiance of the fourth band of the AM0 spectrum. If they do not match, use the above method to sequentially match the irradiance of the first to fourth bands with the irradiance of the first to fourth bands of the AM0 spectrum.

[0077] And so on, until the N-1 filter and the N-2 fill light are used to match the irradiance of the first to N bands to the irradiance of the first to N bands of the AM0 spectrum.

[0078] According to one embodiment of the present application, the shape of the filter that can move relative to the xenon lamp is not limited to a wedge or an isosceles triangle. As long as it can block a portion of the light-emitting surface of the xenon lamp, and the blocking area can change with the movement of the filter, the technical solution of the present application can be implemented. For example, the movable filter can also be rectangular. When the movable filter is rectangular, the direction of movement of the filter is preferably along the extension direction of the xenon lamp tube.

[0079] According to one embodiment of the present application, the first filter and the second filter are arranged overlappingly in the light emitting direction of the xenon lamp. The first filter and the second filter can also be arranged side by side in the light emitting direction of the xenon lamp, that is, they do not overlap each other.

[0080] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0081] The above description is only an illustrative embodiment of the present application and is not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principle of the present application shall fall within the scope of protection of the present application.

Claims

1. A method for adjusting a solar simulator spectrum, the solar simulator comprising: A xenon lamp and an AM0 base filter covering the xenon lamp, used to match the AM0 spectrum, wherein the AM0 spectrum is divided into N bands, where N is greater than or equal to 3; N-1 movable filters, respectively used to attenuate irradiance in N-1 wavelength bands, each movable filter being configured to block a portion of a light-emitting surface of the xenon lamp, and each movable filter being independently movable relative to the xenon lamp, thereby varying an area of the light-emitting surface of the xenon lamp blocked by each movable filter; N-2 fill lights, used to supplement the irradiance of N-2 bands of the AM0 spectrum; Power supply system, used to control the irradiance of xenon lamp and fill light respectively, The adjustment method includes: S1: by adjusting the brightness of the xenon lamp, the irradiance of the first band in the spectrum of the solar simulator matches the first band of the AM0 spectrum; S2: adjusting the shielding area by controlling the movement of the first movable filter, thereby adjusting the irradiance of the second wavelength band of the solar simulator spectrum, so that the irradiance of the second wavelength band of the solar simulator spectrum matches the irradiance of the second wavelength band of the AM0 spectrum; S3: controlling the second movable filter and the first fill light to match the irradiance of the third band of the output spectrum of the solar simulator to the irradiance of the third band of the AM0 spectrum; S4: by controlling the N-1th movable filter and the N-2th fill light, the irradiance of the fourth band of the output spectrum of the solar simulator is matched with the irradiance of the fourth band of the AM0 spectrum. After the irradiance of the nth band of the output spectrum of the solar simulator is matched with the irradiance of the nth band of the AM0 spectrum, the method further includes the following steps: Confirm whether the irradiance of the first to n-1th bands of the output spectrum of the solar simulator still matches the irradiance of the first to n-1th bands of the AM0 spectrum. If not, then make the irradiance of the first to n-1th bands of the output spectrum of the solar simulator match the irradiance of the first to n-1th bands of the AM0 spectrum in sequence. Wherein, n is greater than or equal to 2, and n is less than or equal to N.

2. The method according to claim 1, wherein The movable filter is wedge-shaped and has a first edge and a second edge extending along the axial direction. The first edge and the second edge are inclined relative to the axial direction. The movable filter can move relative to the xenon lamp along the axial direction.

3. The method according to claim 2, wherein: The movable filter is in the shape of an isosceles triangle.

4. The method according to claim 1, wherein N is equal to 3, the AM0 spectrum is divided into short-wave band, medium-wave band, and long-wave band, the first movable filter is used to attenuate the irradiance of the medium-wave band, the second movable filter is used to attenuate the irradiance of the long-wave band, and the fill light is used to supplement the irradiance of the long-wave band.

5. The method according to claim 1, wherein N is equal to 4, the AM0 spectrum is divided into a first band, a second band, a third band, and a fourth band in order of wavelength values from small to large, the first movable filter is used to attenuate the irradiance of the second band, the second movable filter is used to attenuate the irradiance of the third band, the third movable filter is used to attenuate the irradiance of the fourth band, the first fill light is used to supplement the irradiance of the third band, and the second fill light is used to supplement the irradiance of the fourth band.

6. The method according to claim 1, wherein The movable filter is rectangular, and the moving direction of the movable filter is perpendicular to the extending direction of the xenon lamp tube.

7. The method according to claim 1, wherein The fill light is a halogen lamp or an LED lamp.

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