Abstract A lot of research attention has been given to collect sunlight through solar concentrators for indoor illumination. Traditional, parabolic trough as a line focus with single array of fibers had mechanical design and installation issues. Here, a novel daylighting system is proposed to transmit maximum light into the optical fibers using parabolic trough as the primary collector and nonimaging reflector as the secondary reflector. The proposed system increases light levels, improves installations difficulties, and maintains long-term reliability. All modules are designed and verified through raytracing simulation for calculating the efficiency and achieving the required light-levels. The proposed trough-based design inserts maximum light into the fiber bundle, which is placed at the center of the trough. Further, the fiber-coupled bi-layer prismatic optical diffuser provides relatively high uniform illuminance distribution. Simulation results have shown that the light concentration of 285, an optical efficiency of 42%, and an acceptance angle of ±1.1° are achieved that are better than that of previous trough-based daylighting system.

中文翻译：

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使用槽式收集器实现均匀照明的基于光纤的采光系统

摘要 通过太阳能聚光器收集阳光用于室内照明已经引起了很多研究的关注。传统的抛物线槽作为单阵列光纤的线焦点存在机械设计和安装问题。在这里，提出了一种新颖的采光系统，以使用抛物线槽作为主收集器和非成像反射器作为次反射器，将最大的光传输到光纤中。提议的系统提高了光照水平，改善了安装难度，并保持了长期的可靠性。所有模块均通过光线追踪模拟进行设计和验证，以计算效率并实现所需的光照水平。所提议的基于槽的设计将最大的光插入位于槽中心的光纤束中。更多，光纤耦合双层棱镜光扩散器提供相对较高的均匀照度分布。仿真结果表明，光集中度为285，光效率为42%，接受角为±1.1°，优于以往的槽式采光系统。