【摘要】 基于光子晶体具有能使落在禁带区间的电磁波无法在其中传播的特性,本文提出一种在普通铅玻璃上镀光子晶体膜的技术,实现了临床防护X线的目的。本文利用传输矩阵法,通过Matlab编程仿真,甄选合适的光子晶体介质材料、厚度及周期数,设计出X线波段高反射率的一维光子晶体复合结构膜,仿真结果显示该光子晶体复合结构膜对X射线的反射率达到90%以上,实现了临床X线防护要求。解决了目前防护X线的无机铅玻璃的铅当量大、厚重、透明度低且成本高的技术难题。该项技术已获得国家专利,专利号为201220228549.2。更多还原

【Abstract】 Light cannot be propagated within the range of photonic crystal band gaps.Based on this unique property,we proposed a method to improve anti-radiation capability through one-dimensional photonic crystal coating.Using transmission matrix method,we determined the appropriate dielectric materials,thickness and periodic numbers of photonic crystals through Matlab programming simulation.Then,compound one-dimensional photonic crystal coating was designed which was of high anti-radiation rate within the range of X-ray.As is shown through simulation experiments,the reflection rate against X-ray was higher than 90percent,and the desired anti-radiation effect was achieved.Thus,this method is able to help solve the technical problems facing the inorganic lead glass such as thickness,weightiness,costliness,high lead equivalent,low transparency and high cost.This method has won China’s national invention patent approval,and the patent number is 201220228549.2.更多还原