玻璃微珠逆反射系数的数值计算

Numerical Calculation on Retroreflective Coefficient of Glass Beans

衡量逆反射材料性能特性最重要的指标是逆反射系数。用理论方法精确计算各种情况下材料的逆反射系数,无论对逆反射材料反光机理的再认识还是在指导新材料设计开发方面都具有重要意义。采用光线追迹方法研究了光线在玻璃微珠中的逆反射过程,推导了玻璃微珠逆反射系数的计算公式,编写了玻璃微珠逆反射系数的计算程序。基于该程序,全面分析了材料参数、结构参数对逆反射效率的影响趋势。结果表明,材料折射率对微珠的逆反射效率影响显著,当折射率为1.93时玻璃微珠阵列膜的逆反射效率为最高。在折射率固定的前提下获得了不同偏角下逆反射系数的数值解。上述结果对逆反射材料结构优化、设计开发有一定理论参考价值。

Retroreflective coefficient is the most important indicator of the performance characteristics of retroreflective materials.Accurately calculating the retroreflective coefficients of materials under various conditions by theoretical method has important significance in re-recognizing the reflective mechanism of retroreflective materials and guiding the design and development of new materials.Based on ray tracing method, the retroreflective process of light in glass beads was studied.The formula for calculating the retroreflective coefficients of glass beads was deduced.A calculation program of the retroreflective coefficients of glass beads was developed.With this program, the influence trend of material parameters and structural parameters on retroreflective efficiency was comprehensively analyzed.The results show that the refractive index of the material has a significant effect on the retroreflective efficiency of the beads.The glass beads array film has the highest retroreflective efficiency when the refractive index is 1.93.The numerical solution of the retroreflective coefficients at various deflection angles is obtained under the premise of fixed refractive index.These results have certain theoretical value for structural optimization and design development of retroreflective materials.