CN-116047664-B - Irradiation attenuation subdivision device for optical fiber type solar simulator

Abstract

The irradiation attenuation subdivision device for the optical fiber solar simulator is mainly composed of an input optical fiber 41, an optical fiber beam expanding device 42, an irradiation energy attenuator 43, an optical fiber beam converging device 44 and an output optical fiber 45, wherein a beam path is controlled through a beam expanding lens pose adjusting mechanism 423, a diaphragm position adjusting mechanism 433 and a beam converging and zooming lens pose adjusting mechanism 443, irradiation flux is controlled through an adjustable aperture diaphragm 432, and irradiance high-precision continuous subdivision adjustment under the condition of not changing optical fiber coupling of the optical fiber solar simulator is realized, and meanwhile sun collimation angle, irradiation uniformity, irradiation stability and spectrum matching degree are not influenced.

Inventors

• LIU SHI
• XU DA
• MENG YAO
• ZHANG JIERUI
• CHEN SIWEN
• ZHANG YU
• ZHANG GUOYU
• SUN GAOFEI
• ZHANG JIAN
• SU SHI
• YANG SONGZHOU

Assignees

• 长春理工大学

Dates

Publication Date

20260512

Application Date

20230102

Claims (2)

1. 1. An irradiance attenuation subdivision device for an optical fiber type solar simulator, comprising: The device comprises an input optical fiber, an optical fiber beam expander, an irradiation energy attenuator, an optical fiber beam-converging device and an output optical fiber, wherein the optical fiber beam expander comprises a beam expander lens connecting mechanism, a beam expander system and a beam expander lens pose adjusting mechanism; The irradiation attenuation subdivision device for the optical fiber type solar simulator is arranged between a light collecting system and a collimation system of the optical fiber type solar simulator, wherein the input optical fiber is connected with the rear end of the light collecting system, the beam expanding lens connecting mechanism is connected with the rear end of the input optical fiber, the irradiation energy attenuator connecting mechanism is connected with the rear end of the beam expanding lens connecting mechanism, the beam converging and zooming system connecting mechanism is connected with the rear end of the irradiation energy attenuator connecting mechanism, the output optical fiber is connected with the rear end of the beam converging and zooming system connecting mechanism, and the collimation system is connected with the rear end of the output optical fiber; The input optical fiber is used for transmitting unattenuated light source energy from the condensing system, and the numerical aperture is NA1; The beam expanding system of the optical fiber beam expanding device is used for expanding and collimating the input optical fiber beam into parallel light with the diameter the same as the opening diameter Dm corresponding to the maximum luminous flux of the adjustable aperture diaphragm in the irradiation energy attenuator, the numerical aperture NA2 of the beam expanding system meets the relation NA2 = NA1, and the focal length f1 meets the relation f1 = D/NA2; the beam expanding lens pose adjusting mechanism of the optical fiber beam expanding device is used for adjusting the pose of the beam expanding system and simultaneously playing a role in accommodating and fixing the beam expanding system; The beam expanding lens connecting mechanism of the optical fiber beam expanding device is used for connecting the input optical fiber with the irradiation energy attenuator and accommodating and fixing the beam expanding lens pose adjusting mechanism; The adjustable aperture diaphragm realizes the attenuation of different luminous fluxes for the parallel light before attenuation by changing the aperture diameter and then the diameter of the passing light beam, the adjustable aperture diaphragm adopts a high temperature resistant material invar, and the outer surface is coated with black paint with reflectivity lower than 1 percent so as to reduce the generation of stray light; The diaphragm position adjusting mechanism of the irradiation energy attenuator is used for adjusting the position of the adjustable aperture diaphragm relative to the optical fiber beam expander, and simultaneously plays a role in accommodating and fixing the adjustable aperture diaphragm; the irradiation energy attenuator connecting mechanism of the irradiation energy attenuator is used for accommodating and fixing the diaphragm position adjusting mechanism and simultaneously connecting the optical fiber beam expander and the optical fiber beam expander; the optical fiber beam-converging system is used for converging the collimated light beam attenuated by the small hole with the diameter of D 'on the adjustable small hole diaphragm into an output optical fiber, the change of the focal length f2 of the beam-converging system meets the relation f2=D'/NA 3, and the numerical aperture NA3 of the beam-converging system meets the relation NA 3=NA 2=NA 1; The position and posture adjusting mechanism of the beam-converging zoom lens of the optical fiber beam-converging device is used for adjusting the position and posture of the beam-converging zoom system and simultaneously has the functions of accommodating and fixing the beam-converging zoom system; the beam-converging zoom lens connecting mechanism of the optical fiber beam-converging device is used for connecting the irradiation energy attenuator with the output optical fiber and simultaneously accommodating and fixing the beam-converging zoom lens pose adjusting mechanism; the numerical aperture of the output optical fiber is NA4, and the relation NA4 = NA3 = NA2 = NA1 is satisfied, so that the numerical aperture of the light beam incident on the end face of the output optical fiber is kept unchanged under the condition that the adjustable aperture diaphragm changes the diameter of the light beam.
2. 2. A method of using the irradiance attenuation subdivision apparatus of claim 1, comprising: The pose adjustment mechanisms of the beam expanding lens, the diaphragm position adjustment mechanism and the converging zoom lens are used for respectively adjusting the poses of the beam expanding system, the adjustable aperture diaphragm and the converging zoom lens, and high-precision modulation of irradiation energy of the optical fiber solar simulator is realized by ensuring consistency of optical axes among the input optical fiber, the optical fiber beam expanding device, the irradiation energy attenuator, the optical fiber converging device and the output optical fiber; firstly, controlling the pose adjustment of the beam expanding system in x, y, z, alpha, beta and gamma six dimensions through the pose adjustment mechanism of the beam expanding lens to realize the coincidence of the optical axis of the beam expanding system and the optical axis of the outgoing light beam of the input optical fiber, wherein the focus of the beam expanding system is positioned at the outgoing end face of the input optical fiber; Secondly, controlling the position of the adjustable aperture diaphragm in a two-dimensional plane by the diaphragm position adjusting mechanism, and enabling the center of an opening at the maximum luminous flux position to coincide with the optical axis of the collimated parallel light when the adjustable aperture diaphragm is positioned at the initial position; And finally, controlling the pose adjustment of the beam-converging zoom system in x, y, z, alpha, beta and gamma six dimensions by the pose adjustment mechanism of the beam-converging zoom lens to realize the coincidence of the optical axis of the beam-converging zoom system and the optical axis of the beam-expanding system.

Description

Irradiation attenuation subdivision device for optical fiber type solar simulator Technical Field The invention relates to the field of optical fiber type solar simulators, in particular to an irradiation attenuation subdivision device for an optical fiber type solar simulator. Background The optical fiber solar simulator applies the optical fiber technology to the light beam transmission and coupling of the solar simulator, and usually utilizes a light source system, a light filtering system and a collimation system to realize the real simulation of solar irradiance, solar collimation angle, irradiation stability, uniformity and the like by matching with the optical fiber, thereby providing an environment similar to natural sunlight, and being widely applied to the researches of solar cell characteristic test, photoelectric material characteristic test, biochemical related test and the like. From the prior research results, many problems still remain in the research of irradiation adjustment of the optical fiber type solar simulator. The method for adjusting the power of the light source is most commonly used for adjusting irradiance of the optical fiber solar simulator, and due to the influence of the stability of the light source, the irradiation uniformity and the irradiation stability of the optical fiber solar simulator are damaged by the change of the power, so that the precision grade of the optical fiber solar simulator is reduced, and even when the irradiance is lower than 250W/m 2, the method for changing the power of the light source is difficult to play a role in adjusting irradiance. Another irradiance adjustment method is to use a neutral filter, which improves the problem of unstable energy distribution at low power of the light source, but the doping and coating process of the filter is complex and expensive, and affects the spectral distribution of the output beam. In order to realize the irradiation regulation subdivision of the optical fiber type solar simulator, it is necessary to research an irradiation attenuation subdivision device of the optical fiber type solar simulator which is more stable and easy to control, so that the influence of changing the power of a light source or increasing a neutral filter on the irradiation stability, irradiation uniformity and spectrum matching degree of the optical fiber type solar simulator is avoided, the irradiation high-precision continuous subdivision regulation under the condition of not changing the optical fiber coupling of the optical fiber type solar simulator is realized, and meanwhile, the sun alignment right angle, the irradiation uniformity, the irradiation stability and the spectrum matching degree are not greatly influenced. Disclosure of Invention The invention aims to solve the problems in the prior art and designs an irradiation attenuation subdivision device for an optical fiber type solar simulator. The optical fiber solar simulator comprises a light source system, a light filtering system, a light condensing system, a transmission optical fiber and a collimation system, wherein an input optical fiber, an optical fiber beam expander, an irradiation energy attenuator, an optical fiber beam converging device and an output optical fiber for irradiation attenuation subdivision are designed. Under the condition that the power of a light source is not changed and a neutral filter is not added, the irradiation energy attenuator is utilized to adjust the transmission energy of the optical fiber, so that the irradiance high-precision continuous subdivision adjustment under the condition that the optical fiber coupling of the optical fiber type solar simulator is not changed is realized, and meanwhile, the sun alignment angle, the irradiation uniformity, the irradiation stability and the spectrum matching degree are not greatly influenced. The invention solves the problems in the prior art by adopting the technical scheme that the irradiation attenuation subdivision device for the optical fiber type solar simulator comprises the input optical fiber, the optical fiber beam expander, the irradiation energy attenuator, the optical fiber beam converging device and the output optical fiber. The optical fiber solar simulator comprises a light source system, a light filtering system, a light condensing system, a transmission optical fiber and a collimation system, wherein the light source system is arranged at the front end of the light filtering system, the light filtering system is arranged at the front end of the light condensing system, the light condensing system is arranged at the front end of the transmission optical fiber, and the rear end of the transmission optical fiber is provided with the collimation system. In order to realize the irradiation energy subdivision attenuation of the optical fiber type solar simulator, an irradiation energy attenuation subdivision device is arranged between the light condensing system and the collimat