【摘要】 光学积分器是太阳模拟器核心匀光部件，通过适当离焦可提高辐照均匀性。针对目前光学积分器离焦精度低、装调困难、散热效率不高等不足，提出一种高温工况下能够连续离焦和有效散热的光学积分器机械结构。通过离焦分析确定投影镜组离焦范围，设计一种由螺旋传动和直线导槽组成的连续离焦结构及环形肋片的散热结构，并在热载荷下对结构参数进行有限元分析与优化。通过实际测试，光学积分器离焦-2.6 mm时，Φ100 mm辐照光斑内的辐照不均匀度±0.44%，太阳模拟器辐照均匀性最佳，表明投影镜组在高温下能够连续离焦调整，有效提高光学积分器装调精度和效率。更多还原

【Abstract】 The optical integrator is the core homogenization component of the solar simulator,and the uniformity of irradiation can be improved by proper defocusing. Aiming at the current optical integrator’s low defocus accuracy,difficult installation and adjustment,and low heat dissipation efficiency,a mechanical structure of optical integrator that can continuously defocus and effectively dissipate heat under high temperature conditions is proposed. Determine the defocus range of the projection lens group through defocus analysis;design a continuous defocus structure composed of a spiral drive and a linear guide groove,and the heat dissipation structure of the annular fin;and the structural parameters are analyzed and optimized by finite element method under thermal load. Through actual tests,when the optical integrator is defocused at-2.6 mm,the irradiation non-uniformity within the Φ100 mm irradiation spot is ±0.44%,and the solar simulator has the best irradiance uniformity,indicating that the projection lens group can continuously defocus at high temperatures,effectively improving the accuracy and efficiency of optical integrator adjustment.更多还原