二维光栅与周期性缝隙阵列组合薄膜结构的杂散光抑制
于淼;高劲松;张建;徐念喜
【期刊名称】《物理学报》 【年(卷),期】2013(000)020
【摘要】An array of periodic slits, combined with classic grid two-dimensional gratings, can acquire a dual band-pass characteristic in radar and optical wave band. The concentrated distribution of stray light energy will severely restrict the applications of classic composite film structure in high precision detection and imaging. To solve this problem, a novel composite film structure is developed in this paper, which is composed of slit elements and annular gratings. A scalar diffractive model is built based on Fraunhofer diffractive theory through contrasting the diffractive properties of two kinds of composite film structures. The theoretical simulations and experimental results both prove that the annular composite film structure can suppress the stray light effectively, for its higher transmittance, lower ratio and more uniform distribution of stray light, and enhance the reliability of composite film structure in the practical optical applications.%传统方格型二维光栅与周期性缝隙阵列的组合薄膜结构具有雷达和光学波段双带通的电磁特性。但由于其杂散光能量集中分布而严重制约它在高精度探测以及成像领域中的应用。本文提出了一种全新的组合薄膜结构，即由满足一定约束条件的圆孔型二维光栅和十字缝隙阵列构成。基于Fraunhofer衍射理论建立组合薄
二维光栅与周期性缝隙阵列组合薄膜结构的杂散光抑制
