一种顺向聚光实体聚光器的光学性能分析

Optical analysis on a solid collector with forward reflecting concentration

为了改善用于建筑导光的镀膜反射类型的太阳能聚光器的性能,提出一种由透明实体整体成型的全内反射顺向聚光器,该聚光器具有结构紧凑、无需镀膜的特点。论文介绍了聚光器的结构和聚光传光原理。通过建立三维实体模型,应用光学分析软件模拟分析了聚光器的光学传输率,得出在不同入射光偏角时的传输率变化曲线。结果表明,该聚光器具有较大的跟踪容差性能,当平行入射光线偏角为1.4°时,传输率相对于正入射时下降不到20%;偏角为2.2°时,传输率仍然可以达到正入射时传输效率的60.8%;偏角为3°时,传输率还可达到正入射时传输率的50%,即3°为半传输率对应的偏角。因此,以这种结构为基础模块,结合导光光纤,采用空间多方位排列方式,可组成免跟踪系统的固定导光系统。

In order to improve the performance of the collector with reflective coating that used in building light guide, a forward-reflecting collector that is made from solid transparent material is proposed. It is characterized by a compact structure, no reflective coating. The structure and light con- centration and transmitting principle of the collector are introduced. Its 3-D model is made and its optical transmitting rate is simulated by light analysis software. By doing so, the graph of variation of transmitting rate with deflective angle is gained. The result shows that the proposed collector has a good tolerance performance. When parallel incident rays have a deflective angle of 1.4° , the attenuation of the transmitting rate is less than 20% relative to that in normal incidence. In 2. 2° of deflective angle, the transmitting rate remains 60. 8% of that in normal incidence. When in deflective angle of 3°, the transmitting rate is still not less 50%. 3 ° is the deflective angle for half rate. Based on this collector, connected by light fiber and arranged in a multiple direction in the space, a fixed light guide system without tracing system can be made.