A mars surface spectral simulator

Abstract

The application discloses a Mars surface spectrum simulator, comprising a light source assembly, a light homogenizer and a filter set; the light source assembly is used for emitting a light beam; the light homogenizer and the filter set are sequentially arranged on a propagation path of the light beam; the light homogenizer comprises a plurality of discrete lens groups and is used for splitting the light beam and emitting a uniform light beam; and the filter set is used for adjusting the spectrum of the uniform light beam and emitting a Mars surface simulation light beam. The Mars surface spectrum simulator provided in the embodiment of the application splits a Gaussian-distributed light beam into a plurality of light beams by arranging the light homogenizer to comprise a plurality of discrete lens groups, the plurality of light beams are superimposed to form a uniform light beam with high uniformity distribution, the filter set is used for adjusting the spectrum of the uniform light beam, the uniform light beam is modulated, the spectrum of the uniform light beam is similar to that of the Mars surface, and therefore the Mars surface simulation light beam with high uniformity distribution is realized.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of optical technology, in particular to a Mars surface spectrum simulator. BACKGROUND

[0002] The Mars is 1.52 au away from the sun, and the light intensity reaching the Mars surface is greatly weakened compared with the earth, the average light intensity of the Mars orbit is 590 W / m 2 , the AM0 standard light intensity of the earth orbit is 1367 W / m 2 , that is, the average sunlight intensity of the Mars orbit is only about 43% of the AM0 standard light intensity of the earth. 2 In addition, according to the different perihelion and aphelion, the light intensity of the Mars will have a fluctuation of ±19%, and the corresponding sunlight intensity is about 493-717 W / m

[0003] In addition, due to the existence of the atmospheric composition and suspended dust on the Mars surface, the sunlight will be absorbed and scattered in the process of passing through the Mars atmosphere to reach the Mars surface, causing the Mars light intensity to be further reduced, and the absorption and scattering in different wavelength ranges are different, causing the Mars spectrum to have a large change, the transmittance of the sunlight in the blue light segment in the Mars atmosphere is only about 70%, while the transmittance of the red light and the visible light can reach about 85%, and the Mars surface spectrum has a large distortion compared with the AM0 spectrum.

[0004] The Mars spectrum is an important input for the development of the Mars spectrum solar cell and the performance evaluation of the Mars car solar cell array, and if the existing AM0 spectrum simulator is used for testing the solar cell for the Mars surface exploration, there will be a great difference between the test result and the actual performance output on the Mars surface. SUMMARY

[0005] The present application provides a Mars surface spectrum simulator to realize the simulation of the Mars surface spectrum.

[0006] The embodiment of the present application provides a Mars surface spectrum simulator, which comprises a light source assembly, a light homogenizer and a filter group.

[0007] The light source assembly is used for emitting a light beam, the light homogenizer and the filter group are sequentially located on the propagation path of the light beam.

[0008] The light homogenizer comprises a plurality of discrete lens groups, and is used for splitting the light beam and emitting a uniform light beam.

[0009] The filter group is used for adjusting the spectrum of the uniform light beam and emitting a Mars surface simulation light beam.

[0010] Optionally, the plurality of discrete lens groups comprises a plurality of first discrete lens groups and a plurality of second discrete lens groups, the uniform light beams comprise a first uniform light beam and a second uniform light beam, the first discrete lens groups are configured to convert the light beams into the first uniform light beam, and the second discrete lens groups are configured to convert the light beams into the second uniform light beam.

[0011] The filter group comprises a plurality of AM0 filters and a plurality of modulation filters, the AM0 filters are arranged one-to-one corresponding to the first discrete lens groups, and the modulation filters are arranged one-to-one corresponding to the second discrete lens groups.

[0012] The Mars surface simulation light beam comprises a first modulation light beam and a second modulation light beam, the AM0 filters are configured to modulate the spectrum of the first uniform light beam to emit the first modulation light beam, and the modulation filters are configured to modulate the spectrum of the second uniform light beam to emit the second modulation light beam.

[0013] Optionally, the plurality of second discrete lens groups are arranged around the plurality of first discrete lens groups, and the plurality of modulation filters are arranged around the plurality of AM0 filters.

[0014] Optionally, the plurality of modulation filters comprises a first junction filter, a second junction filter, and a third junction filter.

[0015] The transmission wavelength range of the first junction filter is 300nm-700nm, the transmission wavelength range of the second junction filter is 700nm-850nm, and the transmission wavelength range of the third junction filter is 900nm-1700nm.

[0016] Optionally, the second junction filter comprises a first sub-filter and a second sub-filter, the first sub-filter and the second sub-filter are arranged in a stacked manner along the propagation direction of the second uniform light beam, the transmission wavelength range of the first sub-filter is 700nm-1100nm, and the transmission wavelength range of the second sub-filter is 400nm-850nm.

[0017] Optionally, the plurality of discrete lens groups comprises 7 first discrete lens groups and 12 second discrete lens groups, the 12 second discrete lens groups are arranged around the 7 first discrete lens groups, the filter group comprises 7 AM0 filters and 12 modulation filters, and the 12 modulation filters are arranged around the 7 AM0 filters.

[0018] The 12 modulation filters comprise 4 first junction filters, 4 second junction filters, and 4 third junction filters, and the first junction filters, the second junction filters, and the third junction filters are arranged alternately.

[0019] Optionally, the Mars surface spectrum simulator further comprises a light barrier assembly and a stepping motor, the light barrier assembly is located on the propagation path of the second modulated light beam;

[0020] The light barrier assembly comprises a plurality of light barriers, the light barriers are arranged one by one corresponding to the modulation filter;

[0021] The stepping motor is connected with the plurality of light barriers respectively.

[0022] Optionally, the light source assembly comprises a xenon lamp, a parabolic reflector and a total reflector;

[0023] The xenon lamp is used for emitting a light beam, and the parabolic reflector and the total reflector are sequentially located on the propagation path of the light beam.

[0024] Optionally, the Mars surface spectrum simulator further comprises a temperature control test platform, the temperature control test platform is located on the propagation path of the Mars surface simulation light beam, and the temperature control test platform is used for carrying a Mars spectrum solar cell to be tested.

[0025] Optionally, the Mars surface spectrum simulator further comprises a power supply and a control and data acquisition processing system, the power supply is connected with the light source assembly and the control and data acquisition processing system respectively, and the control and data acquisition processing system is connected with the light source assembly.

[0026] The Mars surface spectrum simulator provided by the embodiment of the present application emits a light beam through the light source assembly, divides the Gaussian distributed light beam into a plurality of light beams through the homogenizer comprising a plurality of discrete lens groups, superimposes the plurality of light beams to form a uniform light beam with high uniformity, adjusts the spectrum of the uniform light beam through the filter group, modulates the uniform light beam, so that the spectrum of the uniform light beam reaches the 3A + standard with the spectrum of the Mars surface in the 300nm-1700nm wave band, thereby forming a Mars surface simulation light beam with high uniformity, and the test result of the Mars surface solar cell tested by using the Mars surface spectrum simulator provided by the embodiment of the present application is close to the actual performance output on the Mars surface, thereby solving the problem that the test result of the Mars surface solar cell tested by using the existing AM0 spectrum simulator is greatly different from the actual performance output on the Mars surface, and improving the test accuracy of the Mars surface solar cell. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic diagram of a Mars surface spectrum simulator provided by the embodiment of the present application;

[0028] Figure 2A partial structure diagram of a Mars surface spectrum simulator is provided for the embodiment of the present application.

[0029] Figure 3 A structure diagram of a light homogenizer is provided for the embodiment of the present application.

[0030] Figure 4 A diagram of a light spot formed by the light beam emitted by the light source assembly is provided for the embodiment of the present application.

[0031] Figure 5 A diagram of a uniform light beam emitted by the light homogenizer is provided for the embodiment of the present application.

[0032] Figure 6 A partial structure diagram of another Mars surface spectrum simulator is provided for the embodiment of the present application.

[0033] Figure 7 A diagram of a Mars surface spectrum is provided for the embodiment of the present application.

[0034] Figure 8 A structure diagram of a filter set is provided for the embodiment of the present application.

[0035] Figure 9 A transmittance diagram of a first junction filter is provided for the embodiment of the present application.

[0036] Figure 10 A transmittance diagram of a second junction filter is provided for the embodiment of the present application.

[0037] Figure 11 A transmittance diagram of a third junction filter is provided for the embodiment of the present application.

[0038] Figure 12 A diagram of spectrum segmentation adjustment is provided for the embodiment of the present application.

[0039] Figure 13 A transmittance diagram of a first sub-filter is provided for the embodiment of the present application.

[0040] Figure 14 A transmittance diagram of a second sub-filter is provided for the embodiment of the present application.

[0041] Figure 15 A partial structure diagram of another Mars surface spectrum simulator is provided for the embodiment of the present application. DETAILED DESCRIPTION

[0042] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the scope of the application. In addition, it should be noted that, for the sake of brevity, only structures related to the application are shown and described in the drawings.

[0043] Figure 1 A structural schematic diagram of a Mars surface spectrum simulator provided by an embodiment of the application, Figure 2 A partial structural schematic diagram of a Mars surface spectrum simulator provided by an embodiment of the application, Figure 3 A structural schematic diagram of a light homogenizer provided by an embodiment of the application, as Figures 1-3 shown, the Mars surface spectrum simulator provided by the embodiment of the application includes a light source assembly 10, a light homogenizer 11 and a filter set 12, the light source assembly 10 is used to emit a light beam 20, the light homogenizer 11 and the filter set 12 are sequentially located on the propagation path of the light beam 20, the light homogenizer 11 includes a plurality of discrete lens groups 30, which are used to divide the light beam 20 and emit a uniform light beam 21, and the filter set 12 is used to adjust the spectrum of the uniform light beam 21 and emit a Mars surface simulation light beam 22.

[0044] As Figures 1-3 shown, the light source assembly 10 emits the light beam 20, thereby providing a radiation source for the Mars surface spectrum simulator.

[0045] Continuing to refer to Figures 1-3 , the light homogenizer 11 includes a plurality of discrete lens groups 30, thereby dividing the light beam 20 into a plurality of light beams, and the plurality of light beams are superimposed to form the uniform light beam 21. For example, as Figure 3 shown, taking an example in which the light homogenizer 11 includes 19 discrete lens groups 30, the 19 discrete lens groups 30 divide the light beam 20 into 19 light beams, and the 19 light beams are superimposed on an irradiation surface 41 to form a uniform light spot.

[0046] Figure 4 A schematic diagram of a light spot formed by a light beam emitted by a light source assembly provided by an embodiment of the application, Figure 5 A schematic diagram of a uniform light beam emitted by a light homogenizer provided by an embodiment of the application, as Figures 3-5 shown, optionally, the discrete lens group 30 includes a field lens 31 and a projection lens 32, the structure, relative aperture, focal length, thickness and size of the field lens 31 and the projection lens 32 are the same, and the field lens 31 and the projection lens 32 are symmetrically arranged. Further, the field lens 31 and the projection lens 32 are both arranged as convex lenses, the projection lens 32 is located at the focal point of the field lens 31, and the field lens 31 is located at the focal point of the projection lens 32. As Figure 4As shown, the light spot formed by the light beam 20 emitted by the light source assembly 10 is Gaussian distribution, and the illumination distribution is not uniform. The light beam 20 incident to the light homogenizer 11 is divided by the field lens 31 of the plurality of discrete lens groups 30, and a plurality of light beams are formed. The plurality of light beams are imaged by the projection lens 32 of the plurality of discrete lens groups 30, and a uniform light beam 21 is formed, as shown in Figure 3 and Figure 5 As shown, the uniform light beam 21 forms a light spot with high uniformity distribution on the irradiation surface 41, thereby realizing the uniformization of the light beam 20. In addition, the plurality of discrete lens groups 30 composed of the field lens 31 and the projection lens 32 can also play the role of collimation, so that it is not necessary to additionally set a collimation lens group, thereby reducing the complexity of the Mars surface spectrum simulator.

[0047] With reference to Figures 1-3 , the filter group 12 adjusts the spectrum of the uniform light beam 21 to modulate the uniform light beam 21, so that the spectrum of the uniform light beam 21 is close to the spectrum of the Mars surface, thereby forming a Mars surface simulation light beam 22 with high uniformity distribution. The Mars surface spectrum simulator provided by the embodiment of the present application is used for testing the solar cell for Mars surface exploration, and the test result is close to the actual performance output on the Mars surface, thereby improving the test accuracy of the solar cell for Mars surface exploration.

[0048] In summary, the Mars surface spectrum simulator provided by the embodiment of the present application emits the light beam 20 by setting the light source assembly 10, divides the Gaussian distributed light beam 20 into a plurality of light beams by setting the light homogenizer 11 including the plurality of discrete lens groups 30, and forms the uniform light beam 21 with high uniformity distribution after superimposing the plurality of light beams. The filter group 12 is used for adjusting the spectrum of the uniform light beam 21 to modulate the uniform light beam 21, so that the spectrum of the uniform light beam 21 is close to the spectrum of the Mars surface, thereby forming the Mars surface simulation light beam 22 with high uniformity distribution. The Mars surface spectrum simulator provided by the embodiment of the present application is used for testing the solar cell for Mars surface exploration, and the test result is close to the actual performance output on the Mars surface, thereby solving the problem that the test result of the solar cell for Mars surface exploration using the existing AM0 spectrum simulator is greatly different from the actual performance output on the Mars surface, and improving the test accuracy of the solar cell for Mars surface exploration.

[0049] Figure 6 Another partial structure schematic diagram of the Mars surface spectrum simulator provided by the embodiment of the present application is shown in Figure 6As shown, the plurality of discrete lens groups 30 includes a first discrete lens group 111 and a second discrete lens group 112, and the uniform light beam 21 includes a first uniform light beam 211 and a second uniform light beam 212, the first discrete lens group 111 is configured to convert the light beam 20 into the first uniform light beam 211, and the second discrete lens group 112 is configured to convert the light beam 20 into the second uniform light beam 212. The filter group 12 includes an AM0 filter 121 and a plurality of modulation filters 122, the AM0 filter 121 is arranged in one-to-one correspondence with the first discrete lens group 111, and the modulation filter 122 is arranged in one-to-one correspondence with the second discrete lens group 112, and the Mars surface simulation light beam 22 includes a first modulation light beam 221 and a second modulation light beam 222, the AM0 filter 121 is configured to modulate the spectrum of the first uniform light beam 211, and the first modulation light beam 221 is emitted, and the modulation filter 122 is configured to modulate the spectrum of the second uniform light beam 212, and the second modulation light beam 222 is emitted.

[0050] Specifically, as shown in the figure, Figure 6 The plurality of discrete lens groups 30 includes a first discrete lens group 111 and a second discrete lens group 112, and the filter group 12 includes an AM0 filter 121 and a plurality of modulation filters 122. The first discrete lens group 111 converts the light beam 20 into the first uniform light beam 211, and the AM0 filter 121 is located on the propagation path of the first uniform light beam 211, and the AM0 filter 121 filters the spectrum of the first uniform light beam 211, and the first modulation light beam 221 is emitted, so that the spectrum of the first modulation light beam 221 is similar to the spectrum of the sun outside the atmosphere. The second discrete lens group 112 converts the light beam 20 into the second uniform light beam 212, and the modulation filter 122 is located on the propagation path of the second uniform light beam 212, and the modulation filter 122 filters the spectrum of the second uniform light beam 212, and the second modulation light beam 222 is emitted, and the spectrum of the first modulation light beam 221 is taken as the base spectrum, and the second modulation light beam 222 is superimposed to form the Mars surface simulation light beam 22, so that the spectrum of the Mars surface simulation light beam 22 is similar to the spectrum of the Mars surface.

[0051] Figure 7 A schematic diagram of the spectrum of the Mars surface provided by the embodiment of the present application is shown in the figure, Figure 7 As shown, AM0 represents the spectrum of the sun outside the atmosphere, t0.2Mars30, t0.5Mars30, t1Mars30, t1.5Mars30 and t2Mars30 represent the spectrum of the Mars surface when the particle size of the suspended dust on the Mars surface is different, wherein the larger the number after t represents the larger the particle size of the suspended dust on the Mars surface, and Figure 7It is known that different particle sizes of suspended dust on the Martian surface result in different absorption and scattering of sunlight, leading to variations in the light intensity and spectrum of the Martian surface. In this embodiment, based on the testing requirements of the Martian spectral solar cell under test, the spectrum of the first modulation beam 221 is adjusted using an AMO filter 121 to be similar to the AMO solar spectrum, thus serving as the base spectrum. The spectrum of the second modulation beam 222 is adjusted using a modulation filter 122, so that the first modulation beam 221 superimposed on the second modulation beam 222 forms a Martian surface simulated beam 22. This makes the spectrum of the Martian surface simulated beam 22 similar to the spectrum of the Martian surface when the particle size of suspended dust is different, thereby simulating the Martian surface spectrum when the particle size of suspended dust is different. This simulates the ambient light conditions under different particle sizes of suspended dust on the Martian surface, allowing for comprehensive testing of the Martian spectral solar cell under test.

[0052] Continue to refer to Figure 6 Optionally, a plurality of second discrete lens groups 112 are arranged around a plurality of first discrete lens groups 111, and a plurality of modulation filters 122 are arranged around a plurality of AM0 filters 121.

[0053] Among them, such as Figure 6 As shown, the first discrete lens group 111, located at the center of the homogenizer 11, converts the beam 20 into a first uniform beam 211. The AMO filter 121, located at the center of the filter group 12, filters the first uniform beam 211, resulting in a first modulated beam 221 that has undergone spectral modulation. This first modulated beam 221 serves as the base spectrum for the Mars surface spectral simulator. The second discrete lens group 112, arranged around the multiple first discrete lens groups 111, converts the beam 20 into a second uniform beam 212. The modulation filter 122, arranged around the multiple AMO filters 121, filters the second uniform beam 212, resulting in a second modulated beam 222 that has undergone spectral modulation. Thus, the second modulated beam 222 is superimposed on the first modulated beam 221, forming a Mars surface simulated beam 22 with a spectrum similar to that of the Martian surface.

[0054] Figure 8 This is a schematic diagram of a filter assembly provided in an embodiment of the present invention. Figure 9 This is a schematic diagram illustrating the transmittance of a first junction filter according to an embodiment of the present invention. Figure 10 This is a schematic diagram illustrating the transmittance of a second junction filter according to an embodiment of the present invention. Figure 11 This is a schematic diagram illustrating the transmittance of a third-junction filter according to an embodiment of the present invention. Figure 12 This is a schematic diagram of a spectral segmentation adjustment provided in an embodiment of the present invention, as shown below. Figures 8-12As shown, optionally, the plurality of modulation filters 122 include a first junction filter 51, a second junction filter 52 and a third junction filter 53. The transmission wavelength range of the first junction filter 51 is 300nm to 700nm, the transmission wavelength range of the second junction filter 52 is 700nm to 850nm, and the transmission wavelength range of the third junction filter 53 is 900nm to 1700nm.

[0055] Among them, such as Figures 8-12 As shown, multiple modulation filters 122 are configured, including a first junction filter 51, a second junction filter 52, and a third junction filter 53. The first junction filter 51, the second junction filter 52, and the third junction filter 53 convert the second uniform beam 212 with spectrum S1 into a first junction component with spectrum S2, a second junction component with spectrum S3, and a third junction component with spectrum S4, respectively. The first junction component, the second junction component, and the third junction component are superimposed to form a second modulation beam 222. Furthermore, based on the first modulation beam 221, the second modulation beam 222 is superimposed to form a simulated Martian surface beam 22 with spectrum S5. By adjusting the amounts of the first junction component, the second junction component, and the third junction component, segmented spectrum adjustment is achieved, thereby reducing the difficulty of spectrum adjustment.

[0056] Furthermore, the transmission wavelength range of the first junction filter 51 is 300nm to 700nm, the transmission wavelength range of the second junction filter 52 is 700nm to 850nm, and the transmission wavelength range of the third junction filter 53 is 900nm to 1700nm. These three wavelength ranges correspond to the first adjustable part, the second adjustable part, and the third adjustable part of the triple-junction gallium arsenide solar cell. By adjusting the spectra of the above three wavelength ranges, the Mars surface spectral simulator can be made suitable for testing triple-junction gallium arsenide solar cells.

[0057] It should be noted that the above embodiments only take the Mars surface spectral simulator for testing triple-junction gallium arsenide solar cells as an example. In other embodiments, the segmented adjustment of the spectrum and the wavelength range of each segment of the spectrum can be adjusted according to the solar cell to be tested. For example, if the solar cell to be tested is a quadruple-junction photovoltaic cell, the multiple modulation filters 122 include a first junction filter, a second junction filter, a third junction filter, and a fourth junction filter, which correspond to the first adjustable part, the second adjustable part, the third adjustable part, and the fourth adjustable part of the quadruple-junction photovoltaic cell, respectively. The transmission wavelength range of the first junction filter, the second junction filter, the third junction filter, and the fourth junction filter can also be adjusted according to the absorption wavelength range of the first adjustable part, the second adjustable part, the third adjustable part, and the fourth adjustable part of the quadruple-junction photovoltaic cell. This embodiment of the present invention does not limit this.

[0058] Figure 13A transmittance diagram of a first sub-filter provided for an embodiment of the present application is shown in Figure 14 A transmittance diagram of a second sub-filter provided for an embodiment of the present application is shown in Figures 8-14 Optionally, the second joint filter 52 includes a first sub-filter and a second sub-filter (not shown in the figure), the first sub-filter and the second sub-filter are arranged in a stacking manner along the propagation direction of the second uniform light beam 212, the transmissive wavelength range of the first sub-filter is 700nm-1100nm, and the transmissive wavelength range of the second sub-filter is 400nm-850nm.

[0059] As shown in Figure 13 and Figure 14 , by adopting the first sub-filter with a transmissive wavelength range of 700nm-1100nm and the second sub-filter with a transmissive wavelength range of 400nm-850nm, the transmissive wavelength range of the second joint filter 52 is 700nm-850nm, which can reduce the difficulty of the preparation process of the second joint filter 52, and make the second joint filter 52 more easily realized.

[0060] Continuing to refer to Figure 6 and Figure 8 , the plurality of discrete lens groups 30 includes 7 first discrete lens groups 111 and 12 second discrete lens groups 112, and the 12 second discrete lens groups 112 are arranged around the 7 first discrete lens groups 111. The filter group 12 includes 7 AM0 filters 121 and 12 modulation filters 122, and the 12 modulation filters 122 are arranged around the 7 AM0 filters 121. The 12 modulation filters 122 include 4 first joint filters 51, 4 second joint filters 52, and 4 third joint filters 53, and the first joint filters 51, the second joint filters 52, and the third joint filters 53 are arranged alternately.

[0061] Specifically, as shown in Figure 6 and Figure 8As shown, the homogenizer 11 includes 19 discrete lens groups 30 to split the beam 20 into 19 beams. The 19 discrete lens groups 30 include 7 first discrete lens groups 111 and 12 second discrete lens groups 112, with the second discrete lens groups 112 positioned around the 7 first discrete lens groups 111, thereby dividing the 19 beams into 7 first uniform beams 211 and 12 second uniform beams 212. The filter group 12 includes 7 AM0 filters 121 and 12 modulation filters 122, with the 12 modulation filters 122 positioned around the 7 AM0 filters 121, thereby converting the 7 first uniform beams 211 into 7 first modulation beams 221 and 12 second modulation beams. The 12 modulation filters 122 are divided into three groups. Each group of modulation filters 122 includes 4 first junction filters 51, 4 second junction filters 52 and 4 third junction filters 53, thereby dividing the 12 second modulation beams into 4 first junction components, 4 second junction components and 4 third junction components. By modulating the first junction components, the second junction components and the third junction components respectively, the spectrum can be segmented and adjusted.

[0062] If the number of discrete lens groups 30 is too large, it will increase the complexity of spectral adjustment; if the number of discrete lens groups 30 is too small, it will reduce the uniformity of the uniform beam 21. Therefore, in this embodiment, by setting the homogenizer 11 to include 19 discrete lens groups 30, which include 7 first discrete lens groups 111 and 12 second discrete lens groups 112, and correspondingly setting 7 AM0 filters 121 and 12 modulation filters 122, the uniformity of the uniform beam 21 is guaranteed without making the spectral adjustment too complex.

[0063] Continue to refer to Figure 8 By setting the first junction filter 51, the second junction filter 52 and the third junction filter 53 to be arranged alternately, so that the first junction filter 51, the second junction filter 52 and the third junction filter 53 are evenly distributed on the periphery of the seven AM0 filters 121, it helps to improve the uniformity of spectral adjustment.

[0064] Figure 15 This is a partial structural diagram of another Mars surface spectral simulator provided in an embodiment of the present invention. Optionally, the Mars surface spectral simulator provided in this embodiment of the present invention further includes an aperture assembly 13 and a stepper motor 14. The aperture assembly 13 is located on the propagation path of the second modulation beam 222. The aperture assembly 13 includes multiple apertures 131, and each aperture 131 is configured to correspond one-to-one with a modulation filter 122. The stepper motor 14 is connected to the multiple apertures 131 respectively.

[0065] For example, such as Figure 15As shown, homogenizer channels 1-12 represent 12 second discrete lens groups 112. Modulation filters 122 are set one-to-one with the second discrete lens groups 112. Each modulation filter 122 is provided with an aperture 131 corresponding to the modulation filter 122. The aperture 131 is connected to a stepper motor 14, so that the aperture 131 can be opened or closed under the control of the stepper motor 14, thereby increasing or decreasing the light flux of the corresponding first junction component, second junction component, and third junction component. When the aperture 131 is gradually closed, the light output containing the junction component will be turned off, and the spectral component of the junction will decrease. When the aperture 131 is gradually opened, the light output containing the junction component will be gradually increased, and the spectral component of the junction will increase. Thus, by matching and combining the aperture assembly 13 and the modulation filter 122, the increase and decrease of each junction component can be realized, thereby fine-tuning the spectrum and light intensity of the second modulation beam 222, and thus realizing the simulation of the Martian surface spectrum.

[0066] It should be noted that, in other embodiments, those skilled in the art can also adjust each junction component in other ways, such as by adjusting the optical thickness of the modulation filter 122, or by adjusting the number of superimposed modulation filters 122, etc., and the embodiments of the present invention do not limit this.

[0067] Continue to refer to Figure 1 Optionally, the light source assembly 10 includes a xenon lamp 101, a parabolic reflector 102, and a total reflection mirror 103. The xenon lamp 101 is used to emit a beam 20, and the parabolic reflector 102 and the total reflection mirror 103 are located sequentially on the propagation path of the beam 20.

[0068] Among them, such as Figure 1 As shown, a xenon lamp 101 is used as the radiation source, providing high-brightness and stable illumination for the Mars surface spectral simulator. Furthermore, the spectrum of the beam 20 emitted by the xenon lamp 101 is close to the solar spectrum, which helps improve the utilization rate of the light source. A parabolic reflector 102 reflects a portion of the beam 20 emitted by the xenon lamp 101 to improve the utilization rate of the light source, and the parabolic reflector 102 also serves a collimating function. A total reflection mirror 103 performs total internal reflection of the beam 20, thereby changing the propagation direction of the beam 20 so that the beam 20 emitted by the xenon lamp 101 propagates to the homogenizer 11 at a suitable angle. The number and position of the total reflection mirrors 103 can be designed according to actual needs, and this embodiment of the invention does not limit this.

[0069] In addition, continue to refer to Figure 1Optionally, the light source assembly 10 further comprises a cabinet 15, the cabinet 15 is used to accommodate the xenon lamp 101, the parabolic mirror 102 and the total reflection mirror 103, so as to protect and fix the xenon lamp 101, the parabolic mirror 102 and the total reflection mirror 103, avoid the position of the xenon lamp 101, the parabolic mirror 102 and the total reflection mirror 103 being affected by the external environment, and improve the reliability of the light source assembly 10.

[0070] With reference to the foregoing Figure 1 Optionally, the Mars surface spectrum simulator provided by the embodiment of the present application further comprises a temperature control test platform 16, the temperature control test platform 16 is located on the propagation path of the Mars surface simulation light beam 22, and the temperature control test platform 16 is used to carry the Mars spectrum solar cell to be tested.

[0071] As shown in Figure 1 , the temperature control test platform 16 is used to place the Mars spectrum solar cell to be tested (not shown in the figure), so as to test the Mars spectrum solar cell to be tested by irradiating the Mars spectrum solar cell to be tested with the Mars surface simulation light beam 22. Wherein, the temperature control test platform 16 can regulate the temperature of the Mars spectrum solar cell to be tested placed thereon, so as to ensure that the temperature of the Mars spectrum solar cell to be tested is constant, and improve the accuracy of the test; in addition, the temperature of the Mars spectrum solar cell to be tested can also be adjusted by gradient, so as to test the performance of the Mars spectrum solar cell to be tested under different temperature conditions, and the actual demand can be set by the person skilled in the art.

[0072] In addition, with reference to the foregoing Figure 1 Optionally, the Mars surface spectrum simulator further comprises a mirror 17, the mirror 17 is located on the propagation path of the Mars surface simulation light beam 22, and is used to reflect the Mars surface simulation light beam 22 to the Mars spectrum solar cell to be tested, so as to realize the performance test of the Mars spectrum solar cell to be tested under the irradiation of the Mars surface simulation light beam 22.

[0073] With reference to the foregoing Figure 1 Optionally, the Mars surface spectrum simulator provided by the embodiment of the present application further comprises a power supply 18 and a control and data acquisition processing system 19, the power supply 18 is connected with the light source assembly 10 and the control and data acquisition processing system 19 respectively, and the control and data acquisition processing system 19 is connected with the light source assembly 10.

[0074] The power supply 18 can comprise a stabilized power supply and a transformer, so as to provide a direct current stabilized power supply (DC power supply) for the light source assembly 10, and ensure that the light source assembly 10 can provide a stable irradiation source. The control and data acquisition processing system 19 is connected with the light source assembly 10, so as to realize the starting control of the light source assembly 10.

[0075] With reference to the foregoing Figure 1The control and data acquisition processing system 19 is also connected with the power supply 18 to realize monitoring, interlocking, light intensity feedback and other functions, for example, the light intensity of the light beam 20 emitted by the light source assembly 10 is collected by a light sensor and fed back to the control and data acquisition processing system 19, and the control and data acquisition processing system 19 adjusts the output power of the power supply 18 according to the light intensity, thereby ensuring the stability of the output of the light source assembly 10.

[0076] In other embodiments, the control and data acquisition processing system 19 can also be connected with the stepping motor 14 to realize automatic adjustment of the spectrum of the simulated light beam 22 of the Martian surface. Those skilled in the art can set the functional modules of the Martian surface spectrum simulator according to actual needs, and the embodiments of the present application are not limited in this regard.

[0077] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A Mars surface spectral simulator, characterized by, The light source assembly, the light homogenizer and the filter group are sequentially arranged on the propagation path of the light beam; The light homogenizer comprises a plurality of discrete lens groups for splitting the light beam and emitting a uniform light beam; The filter group is used for adjusting the spectrum of the uniform light beam and emitting a Mars surface simulation light beam; The plurality of discrete lens groups comprises a plurality of first discrete lens groups and a plurality of second discrete lens groups, the uniform light beam comprises a first uniform light beam and a second uniform light beam, the first discrete lens group is used for converting the light beam into the first uniform light beam, and the second discrete lens group is used for converting the light beam into the second uniform light beam; The filter group comprises a plurality of AM0 filters and a plurality of modulation filters, the AM0 filters are arranged one by one corresponding to the first discrete lens groups, and the modulation filters are arranged one by one corresponding to the second discrete lens groups; The Mars surface simulation light beam comprises a first modulation light beam and a second modulation light beam, the AM0 filter is used for modulating the spectrum of the first uniform light beam to emit the first modulation light beam, and the modulation filter is used for modulating the spectrum of the second uniform light beam to emit the second modulation light beam.

2. The Mars surface spectrum simulator according to claim 1, wherein The plurality of second discrete lens groups are arranged around the plurality of first discrete lens groups, and the plurality of modulation filters are arranged around the plurality of AM0 filters.

3. The Mars surface spectrum simulator according to claim 1, wherein The plurality of modulation filters comprise a first junction filter, a second junction filter and a third junction filter; The transmission wavelength range of the first junction filter is 300-700 nm, the transmission wavelength range of the second junction filter is 700-850 nm, and the transmission wavelength range of the third junction filter is 900-1700 nm.

4. The Mars surface spectrum simulator according to claim 3, wherein The second junction filter comprises a first sub-filter and a second sub-filter, the first sub-filter and the second sub-filter are arranged in a stacked manner along the propagation direction of the second uniform light beam, the transmission wavelength range of the first sub-filter is 700-1100 nm, and the transmission wavelength range of the second sub-filter is 400-850 nm.

5. The Mars surface spectrum simulator according to claim 3, wherein The plurality of discrete lens groups comprise 7 first discrete lens groups and 12 second discrete lens groups, the 12 second discrete lens groups are arranged around the 7 first discrete lens groups, the filter group comprises 7 AM0 filters and 12 modulation filters, and the 12 modulation filters are arranged around the 7 AM0 filters; The 12 modulation filters comprise 4 first junction filters, 4 second junction filters and 4 third junction filters, and the first junction filters, the second junction filters and the third junction filters are arranged alternately. ​ 6.The Mars surface spectrum simulator of claim 1, wherein, the Mars surface spectrum simulator further comprises a light-shutter assembly and a stepping motor, the light-shutter assembly is located on the propagation path of the second modulated light beam; the light-shutter assembly comprises a plurality of light shutters, the light shutters are arranged one-to-one corresponding to the modulated filters; the stepping motor is connected with the plurality of light shutters respectively. 7.The Mars surface spectrum simulator of claim 1, wherein, the light source assembly comprises a xenon lamp, a parabolic reflector and a total reflector; the xenon lamp is used for emitting a light beam, the parabolic reflector and the total reflector are sequentially located on the propagation path of the light beam. 8.The Mars surface spectrum simulator of claim 1, wherein, the Mars surface spectrum simulator further comprises a temperature control test platform, the temperature control test platform is located on the propagation path of the Mars surface simulation light beam, and the temperature control test platform is used for carrying a Mars spectrum solar cell to be tested. 9.The Mars surface spectrum simulator of claim 1, wherein, the Mars surface spectrum simulator further comprises a power supply and a control and data acquisition processing system, the power supply is connected with the light source assembly and the control and data acquisition processing system respectively, and the control and data acquisition processing system is connected with the light source assembly.

Images