An irradiance attenuation subdivision device for a fiber-optic solar simulator

Abstract

A kind of irradiation attenuation subdivision device for optical fiber type solar simulator is designed, mainly by input optical fiber 41, optical fiber beam expander 42, irradiation energy attenuator 43, optical fiber beam reducer 44 and output optical fiber 45, the light beam path is controlled by the pose adjustment mechanism 423 of beam expander lens, the aperture position adjustment mechanism 433 of diaphragm and the pose adjustment mechanism 443 of beam reducer zoom lens, the irradiation flux is controlled by adjustable aperture diaphragm 432, high-precision continuous subdivision adjustment of irradiance is realized without changing the optical fiber coupling of optical fiber type solar simulator, while not affecting solar collimation angle, irradiation uniformity, irradiation stability, spectral matching degree.

Description

Technical Field

[0001] This invention relates to the field of fiber optic solar simulators, and more particularly to an irradiance attenuation subdivision device for fiber optic solar simulators. Background Technology

[0002] Fiber optic solar simulators apply optical fiber technology to the beam transmission and coupling of solar simulators. They often utilize light source systems, filtering systems, and collimation systems in conjunction with optical fibers to achieve realistic simulations of solar irradiance, solar collimation angle, irradiance stability, and uniformity, providing an environment close to natural sunlight. They have been widely used in research such as solar cell characteristic testing, optoelectronic material characteristic testing, and biochemical related testing.

[0003] Based on existing research, many problems remain in the study of irradiance regulation for fiber optic solar simulators. Adjusting the light source power is the most common method for regulating irradiance in fiber optic solar simulators. However, due to the influence of light source stability, changes in power can disrupt the uniformity and stability of irradiance in the fiber optic solar simulator, thereby reducing its accuracy level, especially when the irradiance is below 250 W / m². 2 At this time, changing the power of the light source is insufficient to regulate irradiance. Another method for irradiance regulation is to use a neutral density filter. Although this method improves the problem of unstable energy distribution at low light source power, the doping and coating process of the filter is complex and expensive, and it will affect the spectral distribution of the output beam.

[0004] To achieve fine-grained irradiance adjustment in fiber-optic solar simulators, it is necessary to study a more stable and easily controllable fine-grained irradiance attenuation device. This would avoid the impact of changing the light source power or adding a neutral density filter on the irradiance stability, uniformity, and spectral matching of the fiber-optic solar simulator. The goal is to achieve high-precision, continuous fine-grained adjustment of irradiance without altering the fiber coupling of the simulator, while minimizing the impact on solar collimation angle, irradiance uniformity, irradiance stability, and spectral matching. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention designs an irradiance attenuation subdivision device for fiber optic solar simulators.

[0006] For a fiber-optic solar simulator consisting of a light source system, a filtering system, a focusing system, transmission fibers, and a collimation system, an input fiber, a fiber expander, an irradiance energy attenuator, a fiber take-up device, and an output fiber are designed for fine-tuning irradiance attenuation. Without changing the light source power or adding a neutral density filter, the irradiance energy attenuator is used to adjust the transmitted energy of the fiber, achieving high-precision continuous fine-tuning of irradiance without altering the fiber coupling of the fiber-optic solar simulator, while minimizing impact on solar collimation angle, irradiance uniformity, irradiance stability, and spectral matching.

[0007] The technical solution adopted by the present invention to solve the problems of the prior art is: designing an irradiation attenuation subdivision device for a fiber optic solar simulator, including the input fiber, the fiber expander, the irradiation energy attenuator, the fiber take-up device, and the output fiber.

[0008] The fiber optic solar simulator comprises a light source system, a filter system, a focusing system, a transmission fiber, and a collimation system. The light source system is located at the front end of the filter system, the filter system is located at the front end of the focusing system, the focusing system is located at the front end of the transmission fiber, and the collimation system is located at the rear end of the transmission fiber.

[0009] To achieve the fine-grained attenuation of irradiation energy in the aforementioned fiber-optic solar simulator, an irradiation energy attenuation fine-grained device is designed and placed between the focusing system and the collimation system, replacing the transmission fiber; the input fiber is placed at the rear end of the focusing system, and the output fiber is placed at the front end of the collimation system.

[0010] The fiber optic beam expander includes the beam expander lens connection mechanism, the beam expander system, and the beam expander lens pose adjustment mechanism; the irradiation energy attenuator includes the irradiation energy attenuator connection mechanism, the adjustable aperture stop, and the aperture stop position adjustment mechanism; the fiber optic beam take-up device includes the beam take-up zoom system connection mechanism, the beam take-up zoom system, and the beam take-up zoom lens pose adjustment mechanism.

[0011] The irradiance attenuation subdivision device for the fiber optic solar simulator is arranged from front to back as follows: input fiber, fiber expander, irradiance energy attenuator, fiber take-up device, and output fiber. The expander system is located inside the expander lens attitude adjustment mechanism, which is fixed inside the expander lens connection mechanism. The adjustable aperture stop is located inside the aperture position adjustment mechanism, which is fixed inside the irradiance energy attenuator connection mechanism. The take-up zoom system is located inside the take-up zoom lens attitude adjustment mechanism, which is fixed inside the take-up zoom system connection mechanism. The input fiber is connected to the rear end of the focusing system. The expander lens connection mechanism is connected to the rear end of the input fiber. The irradiance energy attenuator connection mechanism is connected to the rear end of the expander lens connection mechanism. The take-up zoom system connection mechanism is connected to the rear end of the irradiance energy attenuator connection mechanism. The output fiber is connected to the rear end of the take-up zoom system connection mechanism. The collimation system is connected to the rear end of the output fiber.

[0012] The input optical fiber is used to transmit unattenuated light source energy from the focusing system, and has a numerical aperture of NA1.

[0013] The beam expanding system of the fiber beam expanding device is used to expand and collimate the input fiber beam into parallel light with the same diameter Dm as the aperture diameter Dm corresponding to the maximum luminous flux of the adjustable aperture stop in the irradiation energy attenuator. The numerical aperture NA2 of the beam expanding system satisfies the relationship NA2=NA1, and the focal length f1 satisfies the relationship f1=Dm / NA2. The optical axis of the beam expanding system coincides with the optical axis of the input fiber beam, and the focal point of the beam expanding system is at the exit end face of the input fiber.

[0014] The beam-expanding lens posture adjustment mechanism of the fiber optic beam expander is used to adjust the posture of the beam-expanding system, and at the same time serves to accommodate and fix the beam-expanding system.

[0015] The beam-expanding lens connection mechanism of the fiber optic beam expander is used to connect the input fiber and the irradiation energy attenuator, and also to accommodate and fix the beam-expanding lens pose adjustment mechanism.

[0016] The initial position of the adjustable pinhole aperture of the irradiation energy attenuator is the position of maximum luminous flux. Here, the aperture diameter of the pinhole aperture is Dm, and the center of the aperture coincides with the optical axis of the parallel light before attenuation. The adjustable pinhole aperture changes the diameter of the light beam by changing the aperture diameter, thereby achieving different luminous flux attenuation of the parallel light before attenuation. The adjustable pinhole aperture is made of high-temperature resistant Invar alloy, and its outer surface is coated with black paint with a reflectivity of less than 1% to reduce the generation of stray light.

[0017] The aperture position adjustment mechanism of the irradiation energy attenuator is used to adjust the position of the adjustable aperture relative to the optical fiber expander, and at the same time serves to accommodate and fix the adjustable aperture.

[0018] The irradiation energy attenuator connection mechanism is used to accommodate and fix the aperture position adjustment mechanism, and at the same time connects the fiber expander and the fiber take-up device.

[0019] The fiber optic beam convergence system is used to converge the collimated beam, after attenuation through a small aperture of diameter D' on the adjustable aperture stop, into the output fiber. The change in focal length f2 of the convergence system satisfies the relationship f2=D' / NA3, where the numerical aperture NA3 of the convergence system satisfies the relationship NA3=NA2=NA1. The optical axis of the convergence system coincides with the optical axis of the output fiber beam, and the focal point of the convergence system is at the exit end face of the output fiber.

[0020] The fiber optic telephoto lens pose adjustment mechanism of the fiber optic telephoto device is used to adjust the pose of the telephoto telephoto system, and at the same time serves to accommodate and fix the telephoto telephoto system.

[0021] The fiber optic telescoping device's telescoping zoom lens connection mechanism is used to connect the irradiation energy attenuator and the output fiber, and also to accommodate and fix the telescoping zoom lens pose adjustment mechanism.

[0022] The output optical fiber is used to output the attenuated light source energy to the collimation system. The numerical aperture of the output optical fiber is NA4, which satisfies the relationship NA4=NA3=NA2=NA1, thereby ensuring that the numerical aperture of the beam incident on the end face of the output optical fiber remains unchanged when the adjustable aperture changes the beam diameter.

[0023] In use, first, the input end face of the input optical fiber is placed at the input end face position of the transmission optical fiber, i.e., the focusing focal plane of the focusing system; then, the fiber beam expander is placed at the rear end of the output optical fiber, wherein the beam expander system is placed in the beam expander lens connection mechanism and fixed to the beam expander lens connection mechanism through the beam expander lens pose adjustment mechanism. The beam expander lens pose adjustment mechanism is used to control the pose adjustment of the beam expander system in six dimensions (x, y, z and α, β, γ), adjusting the focal point of the beam expander system to the center of the output end face of the output optical fiber, and simultaneously adjusting the optical axis of the beam expander system to be perpendicular to the output end face of the output optical fiber; next, the irradiation energy attenuator is placed at the rear end of the fiber beam expander, and the adjustable aperture is placed in the irradiation energy attenuator connection mechanism and fixed to the irradiation energy attenuator connection mechanism through the aperture position adjustment mechanism. The aperture position adjustment mechanism is used to control the position of the adjustable aperture in its own two-dimensional plane, so that the beam emitted from the beam expander system is flat. The light beam is perpendicularly incident on the adjustable pinhole aperture. Next, the fiber optic cable gathering device is placed at the rear end of the irradiation energy attenuator, and the cable-gathering zoom system is placed in the cable-gathering zoom system connection mechanism and fixed to it via the cable-gathering zoom lens pose adjustment mechanism. The cable-gathering zoom lens pose adjustment mechanism is used to control the six-dimensional pose adjustment of the cable-gathering zoom system (x, y, z and α, β, γ), adjusting the optical axis of the cable-gathering zoom system to coincide with the optical axis of the beam expander. Simultaneously, the focal length f2 of the cable-gathering zoom system is adjusted to satisfy the relationship f2 = D' / NA3, where the numerical aperture NA3 of the cable-gathering zoom system satisfies the relationship NA3 = NA2 = NA1. Then, the output fiber is placed at the rear end of the fiber optic cable gathering device, and the center of the incident end face of the output fiber is placed at the focal point of the cable-gathering zoom system. Finally, the output end face of the output fiber is placed at the focal point of the collimation system, and the optical axis of the collimation system is perpendicular to the output end face of the output fiber. This achieves the attenuation subdivision of irradiance in a fiber optic solar simulator by changing the size of the adjustable aperture.

[0024] In summary, the present invention provides an irradiance attenuation subdivision device for a fiber optic solar simulator, comprising the output optical fiber, the beam-expanding lens connection mechanism in the optical fiber beam expander, the beam expander system and the beam expander lens attitude adjustment mechanism, the irradiance energy attenuator connection mechanism in the irradiance energy attenuator, the adjustable aperture stop and the aperture position adjustment mechanism, the fiber optic take-up zoom system connection mechanism in the optical fiber take-up device, the take-up zoom system and the take-up zoom lens attitude adjustment mechanism, and the output optical fiber. This irradiance attenuation subdivision device for a fiber optic solar simulator can achieve high-precision continuous subdivision adjustment of irradiance without changing the fiber coupling of the fiber optic solar simulator, while avoiding the impact of changing the light source power or adding a neutral density filter on the irradiance stability, irradiance uniformity, and spectral matching degree of the fiber optic solar simulator. Simultaneously, it does not significantly affect the solar collimation angle, irradiance uniformity, irradiance stability, or spectral matching degree. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a fiber optic solar simulator according to the present invention;

[0026] Figure 2 This is a schematic diagram of the composition of an irradiation attenuation subdivision device for a fiber optic solar simulator according to the present invention.

[0027] Figure label:

[0028] 1—Light source system; 2—Filtering system; 3—Concentrating system; 4—Transmission fiber; 41—Input fiber; 42—Fiber optic beam expander; 421—Beam expander lens connection mechanism; 422—Beam expander system; 423—Beam expander lens pose adjustment mechanism; 43—Irradiation energy attenuator; 431—Irradiation energy attenuator connection mechanism; 432—Adjustable aperture stop; 433—Aperture stop position adjustment mechanism; 44—Fiber optic beam take-up device; 441—Beam take-up zoom system connection mechanism; 442—Beam take-up zoom system; 443—Beam take-up zoom lens pose adjustment mechanism; 45—Output fiber; 5—Collimation system Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. It should be noted that similar or identical elements are referred to by the same reference numerals in the drawings or description.

[0030] Figure 1 This is a schematic diagram of the overall structure of a fiber optic solar simulator according to the present invention. Figure 1The fiber optic solar simulator consists of a light source system 1, a filter system 2, a focusing system 3, a transmission fiber 4, and a collimation system 5. The light source system 1 is located in front of the filter system 2, the filter system 2 is located in front of the focusing system 3, the focusing system 3 is located in front of the transmission fiber 4, and the collimation system 5 is located behind the transmission fiber 4.

[0031] Figure 2 This is a schematic diagram of the irradiance attenuation subdivision device for a fiber optic solar simulator according to the present invention. Figure 2 As shown, the irradiance attenuation subdivision device for a fiber optic solar simulator consists of an input fiber 41, a fiber optic beam expander 42, an irradiance energy attenuator 43, a fiber optic beam take-up device 44, and an output fiber 45. The fiber optic beam expander 42 includes a beam expander lens connection mechanism 421, a beam expander system 422, and a beam expander lens pose adjustment mechanism 423; the irradiance energy attenuator 43 includes an irradiance energy attenuator connection mechanism 431, an adjustable pinhole aperture 432, and an aperture position adjustment mechanism 433; the fiber optic beam take-up device 44 includes a beam take-up zoom system connection mechanism 441, a beam take-up zoom system 442, and a beam take-up zoom lens pose adjustment mechanism 443. An irradiance attenuation subdivision device for a fiber optic solar simulator is positioned between the focusing system 3 and the collimation system 5 of the fiber optic solar simulator. The input fiber 41 is connected to the rear end of the focusing system 3; a beam expander lens connection mechanism 421 is connected to the rear end of the input fiber 41; an irradiance energy attenuator connection mechanism 431 is connected to the rear end of the beam expander lens connection mechanism 421; a beam convergence and zoom system connection mechanism 441 is connected to the rear end of the irradiance energy attenuator connection mechanism 431; an output fiber 45 is connected to the rear end of the beam convergence and zoom system connection mechanism 441; and the collimation system 5 is connected to the output... The fiber optic cable 45 is connected at the rear end; wherein, the beam expanding system 422 is placed inside the beam expanding lens posture adjustment mechanism 423, the beam expanding lens posture adjustment mechanism 423 is fixed inside the beam expanding lens connection mechanism 421, the adjustable aperture stop 432 is placed inside the aperture position adjustment mechanism 433, the aperture position adjustment mechanism 433 is fixed inside the irradiation energy attenuator connection mechanism 431, the beam shrinking zoom system 442 is placed inside the beam shrinking zoom lens posture adjustment mechanism 443, the beam shrinking zoom lens posture adjustment mechanism 443 is fixed inside the beam shrinking zoom system connection mechanism 441.

[0032] The input fiber 41 is used to transmit unattenuated light source energy from the focusing system 3, and has a numerical aperture of NA1.

[0033] The beam expanding system 422 of the fiber optic beam expanding device 42 is used to expand and collimate the beam from the input fiber 41 into parallel light with the same diameter as the aperture diameter Dm corresponding to the maximum luminous flux of the adjustable aperture stop 432 in the irradiation energy attenuator 43. The numerical aperture NA2 of the beam expanding system 422 satisfies the relationship NA2=NA1, and the focal length f1 satisfies the relationship f1=Dm / NA2. The optical axis of the beam expanding system 422 coincides with the optical axis of the beam from the input fiber 41, and the focal point of the beam expanding system 422 is at the exit end face of the input fiber 41.

[0034] The beam-expanding lens pose adjustment mechanism 423 of the fiber optic beam expander 42 is used to adjust the pose of the beam expander system 422, and at the same time serves to accommodate and fix the beam expander system 422.

[0035] The beam-expanding lens connection mechanism 421 of the fiber optic beam expander 42 is used to connect the input fiber 41 and the irradiation energy attenuator 43, and is also used to accommodate and fix the beam-expanding lens pose adjustment mechanism 423.

[0036] The initial position of the adjustable pinhole aperture 432 of the irradiation energy attenuator 43 is the position of maximum luminous flux. Here, the aperture diameter of the pinhole aperture is Dm, and the center of the aperture coincides with the optical axis of the parallel light before attenuation. The adjustable pinhole aperture 432 changes the diameter of the light beam by changing the aperture diameter, thereby achieving different luminous flux attenuation of the parallel light before attenuation. The adjustable pinhole aperture 432 is made of high-temperature resistant Invar alloy, and the outer surface is coated with black paint with a reflectivity of less than 1% to reduce the generation of stray light.

[0037] The aperture position adjustment mechanism 433 of the irradiation energy attenuator 43 is used to adjust the position of the adjustable aperture 432 relative to the fiber optic expander 42, and at the same time serves to accommodate and fix the adjustable aperture 432.

[0038] The irradiation energy attenuator connection mechanism 431 of the irradiation energy attenuator 43 is used to accommodate and fix the aperture position adjustment mechanism 433, and at the same time connects the fiber optic expander 42 and the fiber optic take-up device 44.

[0039] The fiber optic beam-gathering device 44's beam-gathering and zooming system 442 is used to converge the collimated beam, after attenuation through a small aperture with a diameter of Dm / 2 on the adjustable aperture stop 432, into the output fiber 45. The change in focal length f2 of the beam-gathering and zooming system 442 satisfies the relationship f2=Dm / (2×NA3), where the numerical aperture NA3 of the beam-gathering and zooming system 442 satisfies the relationship NA3=NA2=NA1. The optical axis of the beam-gathering and zooming system 442 coincides with the optical axis of the beam in the output fiber 45, and the focal point of the beam-gathering and zooming system 442 is at the exit end face of the output fiber 45.

[0040] The fiber optic telescoping device 44's telescoping zoom lens pose adjustment mechanism 443 is used to adjust the pose of the telescoping zoom system 442, and also serves to accommodate and fix the telescoping zoom system 442.

[0041] The fiber optic telescopic lens connection mechanism of the fiber optic telescopic device 44 is used to connect the irradiation energy attenuator 43 and the output fiber 45, and is also used to accommodate and fix the telescopic lens pose adjustment mechanism 443.

[0042] The output fiber 45 is used to output the attenuated light source energy to the collimation system 5. The numerical aperture of the output fiber 45 is NA4, which satisfies the relationship NA4=NA3=NA2=NA1, thus ensuring that the numerical aperture of the beam at the end face of the incident output fiber 45 remains unchanged when the beam diameter is changed by the adjustable aperture stop 432.

[0043] In use, first place the input end face of the input fiber 41 at the input end face position of the transmission fiber 4, i.e., the focusing focal plane of the focusing system 3; then place the fiber beam expander 42 at the rear end of the output fiber 45. The beam expander system 422 is placed in the beam expander lens connection mechanism 421 and fixed to the beam expander lens connection mechanism via the beam expander lens pose adjustment mechanism 423. The beam expander lens pose adjustment mechanism 423 controls the six-dimensional pose adjustment of the beam expander system 422 (x, y, z and α, β, γ) to adjust the focal point of the beam expander system 422 to the output fiber 4. At the center of the output end face of fiber optic cable 422, the optical axis of the beam expanding system 422 is adjusted to be perpendicular to the output end face of the output fiber optic cable 45. Next, the irradiation energy attenuator 43 is placed at the rear end of the fiber optic beam expanding device 42, and the adjustable aperture stop 432 is placed in the irradiation energy attenuator connecting mechanism 431 and fixed to it via the aperture position adjustment mechanism 433. The aperture position adjustment mechanism 433 controls the position of the adjustable aperture stop 432 within its own two-dimensional plane, ensuring that the parallel light emitted from the beam expanding system 422... A vertically incident adjustable pinhole aperture 432 is used; next, the fiber optic gathering device 44 is placed at the rear end of the irradiation energy attenuator 43, and the gathering zoom system 442 is placed in the gathering zoom system connection mechanism 441, and fixed to the gathering zoom system connection mechanism 441 through the gathering zoom lens pose adjustment mechanism 443. The gathering zoom lens pose adjustment mechanism 443 is used to control the six-dimensional pose adjustment of the gathering zoom system 442 in x, y, z and α, β, γ, adjusting the optical axis of the gathering zoom system 442 to a position coinciding with the optical axis of the beam expander system 422. At the same time, the focal length f2 of the convergence zoom system 442 is adjusted to satisfy the relationship f2 = Dm / (2 × NA3), where the numerical aperture NA3 of the convergence zoom system 442 satisfies the relationship NA3 = NA2 = NA1. Next, the output fiber 45 is placed at the rear end of the fiber convergence device 44, and the center of the incident end face of the output fiber 45 is placed at the focal point of the convergence zoom system 442. Finally, the output end face of the output fiber 45 is placed at the focal point of the collimation system 5, and the optical axis of the collimation system 5 is perpendicular to the output end face of the output fiber 45. This achieves attenuation subdivision of the fiber optic solar simulator irradiance by changing the size of the adjustable pinhole aperture 432.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A irradiance attenuation subdivision device for a fiber optic solar simulator, characterized in that, include: The system comprises an input optical fiber, an optical fiber expander, an irradiation energy attenuator, an optical fiber take-up device, and an output optical fiber; wherein, the optical fiber expander includes an expander lens connection mechanism, an expander system, and an expander lens pose adjustment mechanism; the irradiation energy attenuator includes an irradiation energy attenuator connection mechanism, an adjustable pinhole aperture, and an aperture position adjustment mechanism; the optical fiber take-up device includes a take-up zoom system connection mechanism, a take-up zoom system, and a take-up zoom lens pose adjustment mechanism; The irradiance attenuation subdivision device for a fiber optic solar simulator is positioned between the focusing system and the collimation system of the fiber optic solar simulator. The input fiber is connected to the rear end of the focusing system; the beam expander lens connection mechanism is connected to the rear end of the input fiber; the irradiance energy attenuator connection mechanism is connected to the rear end of the beam expander lens connection mechanism; the beam convergence and zoom system connection mechanism is connected to the rear end of the irradiance energy attenuator connection mechanism; the output fiber is connected to the rear end of the beam convergence and zoom system connection mechanism; and the collimation system is connected to the rear end of the output fiber. The beam expander system is located inside the beam expander lens attitude adjustment mechanism, which is fixed inside the beam expander lens connection mechanism. The adjustable aperture stop is located inside the aperture position adjustment mechanism, which is fixed inside the irradiance energy attenuator connection mechanism. The beam convergence and zoom system is located inside the beam convergence and zoom lens attitude adjustment mechanism, which is fixed inside the beam convergence and zoom system connection mechanism. The input optical fiber is used to transmit unattenuated light source energy from the focusing system, and has a numerical aperture of NA1. The beam expanding system of the fiber beam expanding device is used to expand and collimate the input fiber beam into parallel light with the same diameter Dm as the aperture diameter Dm corresponding to the maximum luminous flux of the adjustable aperture stop in the irradiation energy attenuator. The numerical aperture NA2 of the beam expanding system satisfies the relationship NA2=NA1, and the focal length f1 satisfies the relationship f1=D / NA2. The optical axis of the beam expanding system coincides with the optical axis of the input fiber beam, and the focal point of the beam expanding system is at the exit end face of the input fiber. The beam-expanding lens posture adjustment mechanism of the fiber optic beam expander is used to adjust the posture of the beam-expanding system, and at the same time serves to accommodate and fix the beam-expanding system. The beam-expanding lens connection mechanism of the fiber optic beam expander is used to connect the input fiber and the irradiation energy attenuator, and also to accommodate and fix the beam-expanding lens pose adjustment mechanism. The initial position of the adjustable pinhole aperture of the irradiation energy attenuator is the position of maximum luminous flux. Here, the aperture diameter of the pinhole aperture is Dm, and the center of the aperture coincides with the optical axis of the parallel light before attenuation. The adjustable pinhole aperture changes the diameter of the light beam by changing the aperture diameter, thereby achieving different luminous flux attenuation of the parallel light before attenuation. The adjustable pinhole aperture is made of high-temperature resistant Invar alloy, and its outer surface is coated with black paint with a reflectivity of less than 1% to reduce the generation of stray light. The aperture position adjustment mechanism of the irradiation energy attenuator is used to adjust the position of the adjustable small aperture relative to the optical fiber expander, and at the same time serves to accommodate and fix the adjustable small aperture. The irradiation energy attenuator connection mechanism is used to accommodate and fix the aperture position adjustment mechanism, and at the same time connects the fiber expansion device and the fiber take-up device; The fiber optic beam convergence and zooming system is used to converge the collimated beam, after attenuation through a small aperture of diameter D' on the adjustable aperture stop, into the output fiber. The change in focal length f2 of the convergence and zooming system satisfies the relationship f2=D' / NA3, where the numerical aperture NA3 of the convergence and zooming system satisfies the relationship NA3=NA2=NA1. The optical axis of the convergence and zooming system coincides with the optical axis of the output fiber beam, and the focal point of the convergence and zooming system is located at the exit end face of the output fiber. The fiber optic telephoto lens pose adjustment mechanism of the fiber optic telephoto device is used to realize the pose adjustment of the telephoto zoom system, and at the same time plays the role of accommodating and fixing the telephoto zoom system. The fiber optic telescoping device's telescoping zoom lens connection mechanism is used to connect the irradiation energy attenuator and the output fiber, and also to accommodate and fix the telescoping zoom lens pose adjustment mechanism. The output optical fiber is used to output the attenuated light source energy to the collimation system; the numerical aperture of the output optical fiber is NA4, which satisfies the relationship NA4=NA3=NA2=NA1, thereby ensuring that the numerical aperture of the beam incident on the end face of the output optical fiber remains unchanged when the adjustable aperture changes the beam diameter.

2. A method using the irradiation attenuation subdivision device as described in claim 1, characterized in that, include: The beam-expanding lens posture adjustment mechanism, the aperture position adjustment mechanism, and the beam-shrinking zoom lens posture adjustment mechanism are used to adjust the posture of the beam-expanding system, the adjustable pinhole aperture, and the beam-shrinking zoom lens, respectively. By ensuring the consistency of the optical axes among the input optical fiber, the optical fiber beam-expanding device, the irradiation energy attenuator, the optical fiber beam-shrinking device, and the output optical fiber, high-precision modulation of the irradiation energy of the fiber optic solar simulator is achieved. First, the beam-expanding lens pose adjustment mechanism controls the six-dimensional pose adjustment of the beam-expanding system (x, y, z and α, β, γ) to achieve the optical axis of the beam-expanding system coinciding with the optical axis of the beam emitted from the input fiber, and the focal point of the beam-expanding system is located at the output end face of the input fiber. Secondly, the position of the adjustable aperture stop in its own two-dimensional plane is controlled by the aperture position adjustment mechanism, so that when the adjustable aperture stop is in the initial position, the center of the aperture at the maximum light flux position coincides with the collimated parallel light axis. Finally, the six-dimensional pose adjustment of the convergence zoom system (x, y, z and α, β, γ) is controlled by the convergence zoom lens pose adjustment mechanism to achieve the alignment of the optical axis of the convergence zoom system with the optical axis of the beam expander system.

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