提出了一种侧入式无导光板自然光平板灯的设计方法.利用有机玻璃光纤将收集的自然光传导至平板灯里, 为达到均匀的自然光出光效果, 通过柱面透镜将光纤的输出光会聚并掠射在带有自由曲面的反光背板上.借助Tracepro软件设计不同投射角下的自由曲面反光背板并仿真, 结果表明: 设计的灯具照度均匀度达到94.1%.该灯具不仅可以解决LED的蓝光危害问题而且制作流程简单.该设计对太阳光转化为功能性照明和绿色照明具有借鉴意义.

An edge-lighting natural light flat panel light without light guide plate was designed. The collector collects the nature-light, then the light is transported to the panel lights with the help of PMMA optical fiber. In order to obtain uniform illumination, the beam from the fiber was converged by using a cylindrical lens and grazed through the reflective back panel with freeform surface. Furthermore, the effect of the flat panel light was simulated by using the Tracepro software. And different illumination maps for different angles which between optical fiber and the reflective back panel were get after further simulation. The simulation shows that the uniformity of illumination can reach 94.1% after optimizing the parameters of the flat panel light. This light not only can solve the danger of LED blue light, but also simpler the production process, which has a good reference for converting sunlight into the green lighting and functional lighting.