中国激光, 2015, 42 (2): 0207002, 网络出版: 2015-01-19
基于薄片组合技术的反光膜结构优化设计
Structure Optimization of Retroreflective Sheeting Based on Laminae Combination Technique
薄膜 视觉光学 反光膜设计 计算机模拟 薄片组合技术 立方角锥 thin films visual optics retroreflective sheeting design computer simulation laminae combination technique cube corner
摘要
与传统玻璃微珠埋入型膜结构相比,立方角锥型膜结构具有更高的逆反射效率,它是设计制作钻石级反光膜的基础。然而立方角锥型反光膜的有效入射角范围较小,逆反射系数具有各向异性,这些问题会影响反光膜的使用效果。对于上述问题,探索了新的解决方法。基于光线追踪原理,应用基本的光学规律,建立仿真模型分析立方角锥反光膜的逆反射性能。针对薄片组合技术中的宽厚比和顶点偏移两个参数分别展开讨论。发现上述两个参数的改变对立方角锥型反光膜的逆反射性能都有较大影响,可以通过对立方角锥单元的宽厚比和顶点偏移两个参数进行合理设置,以达到增大反光膜有效入射角范围并且改善逆反射系数的各向异性的效果。上述结论对立方角锥反光膜的优化设计具有一定指导意义。
Abstract
Compared with the traditional glass beads embedded type membrane structure, cube corner type membrane structure has higher retroreflection coefficient. It is the foundation of designing and producing diamond grade retroreflective film. However, the entrance angle of cube corner type retroreflective sheeting is limited, and the retroreflection coefficient is anisotropic, these problems will affect the using effect of retroreflective sheeting. The new solution for the above problems has been studied. Based on ray tracing technology and the basic theory of optics, a simulation model is built to analyze the retroreflection performance of cube corner retroreflective film. For laminae combination technology, width/thickness ratio and apex decentration are studied. It is found that the retroreflection performance varies dramatically with these two parameters. Through setting appropriate width/thickness ratio as well as apex decentration distance of cube corner elements, the effective incident angle range is increased and the anisotropy of retroreflection coefficient is weakened. These conclusions have certain guiding significance for the optimization design of the cube corner retroreflective sheeting.
罗汉, 袁长迎. 基于薄片组合技术的反光膜结构优化设计[J]. 中国激光, 2015, 42(2): 0207002. Luo Han, Yuan Changying. Structure Optimization of Retroreflective Sheeting Based on Laminae Combination Technique[J]. Chinese Journal of Lasers, 2015, 42(2): 0207002.