摘要
龙虾眼透镜作为一种特殊的透射式反射聚焦元件,在X射线等高能领域具有重要的应用价值,并在可见光、红外波段具有潜在的应用前景。为提高龙虾眼透镜的成像质量,从理论方面分析了变周期闪耀光栅的衍射干涉因子以及衍射场情况,利用变周期闪耀光栅对龙虾眼通道内壁进行微整形,并且对经过微整形之后的一维龙虾眼结构进行了聚焦光场分布计算。通过与之前结构的仿真对比,结果表明:焦距为100 mm时,有效半口径为95 mm的现有结构在焦面处的弥散斑直径由10 mm减小至1 mm,光能集中度由75%增大至89.62%,并且在不同入射高度下焦平面处的光斑直径以及光能集中度均有提高。
As a special transflective focusing element,the lobster eye lens has important application value in the field of high energy such as X-ray,and in the visible light,infrared band has potential applications.Focused on improving the imaging quality of the lobster eye lens,the diffraction interference factor and the diffraction field of the variable periodic glare grating were discussed theoretically.The inner wall of the lobster eye channel was micro-formed by the variable periodic blazed gratings,and simulating the structure of one-dimensional lobster eye had been micro-formed.The simulation results show that the focal length is 100 mm,effective semi aperture 95 mm bores the existing structure in coke.The dispersion spot diameter at focal plane is reduced from 10 mm to 1 mm,the energy concentration increases from 75%to 89.62%,and the spot diameter and the concentration of light energy at the focal plane at different incident altitudes are both increased.
作者
赵玄
欧阳名钊
付跃刚
赵雨石
张贺
崔启胤
刘雪元
Zhao Xuan;Ouyang Mingzhao;Fu Yuegang;Zhao Yushi;Zhang He;Cui Qinyin;Liu Xueyuan(School of Opto-electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2018年第3期60-65,共6页
Infrared and Laser Engineering
基金
国家自然科学基金(61705018)
关键词
X射线
变周期光栅
龙虾眼
光能集中度
衍射效率
X-ray
variable period grating
lobster eye
light energy concentration
diffraction efficiency
