影响玻璃微珠回向反射性能的主要因素分析

从理论和实验两方面分析了玻璃微珠的回向反射特性,主要讨论了玻璃微珠的折射率和其反射层面积这两个因素对回向反射性能的影响. 研究结果表明,折射率增大, 折射率小于2时,回向反射性能逐渐增强, 相反, 在折射率大于2时, 回向反射性能减弱; 反射层面积的大小会影响入射光线的完整回向反射过程; 最后定义了有效回向反射角度, 并给出了玻璃微珠在激光照射下的二维回向反射光照度分布.

Study on the Key Factors Deteriorating the Retroreflective Capability of Glass Microspheres

The retroreflective capability of a kind of paint made of glass microspheres, is theoretically investigated and experimentally demonstrated in this paper. Two factors, refractive index and reflective area related with the retroreflective capability are discussed. The theoretic results show that retroreflective intensity increases gradually with accretion of refractive index when refractive index is less than two, but decreases when refractive index is great than two. The reflective area of a glass microsphere plays an important role in finishing the retroreflective procedure. An efficient retroreflective angle is defined as a key parameter referred for practice application. Finally, an experimental photograph of retroreflective intensity distribution is obtained.