衍射光学元件(Diffractive optical elements, DOE)具有 独特的色散特性和灵活的设计自由度,将多个DOE级联用于太阳能电池聚光系统可同时实现聚焦、 整形和分光谱功能。给出了设计思想和算法,并用七波长混合光作入射光进行模拟,优化后在目标面得 到七个形状规则且完全分开的均匀圆斑。将此级联结构应用到太阳能聚光系统可有效提高太阳能利用效率。

Diffractive optical element (DOE) has unique dispersion characteristics and flexible design freedom. The cascaded DOE was applied in the concentrator system of solar cell to achieve focusing, shaping and spectrum separation function and the design methods and algorithms were presented. Seven regular shaped and completely separated spots were observed on the target surface when simulating with the mixed seven-wavelength light. It is proved that the cascaded DOE structure can effectively enhance the efficiency of solar energy utilization.