Design and analysis of the Fresnel zone plate applied in the refractive-diffractive hybrid imaging system with the short focus length;
短焦距折衍射变焦成像系统中菲涅耳波带片的设计与分析
By using three-time lithography,a combination structure of Fresnel zone plate and plane gratings with 8 phase level steps can be prepared on a quartz substrate by micro-optical element fabrication technology according to Fresnel diffraction theory.
根据菲涅耳衍射理论,采用微光学制作技术通过3次套刻,将8位相台阶的菲涅耳波带片和平面光栅组合制作在同一块基片上,构成同时具有色散分光和聚焦光谱线功能的位相型光栅。
By using Fresnel zone plate′s focusing function, and combini.
并提出一种制作隐形条型码的方法 ,利用菲涅耳波带片调制 ,制作成具有自聚焦功能的隐形条型码。
Based on the half wave belt, we discussed the Fresnel zone plates’ diffraction, its multiple focus and light intensity of focuses.
基于半波带的分析方法简单明了地分析了平行光经菲涅耳波带片衍射后的多焦点特性以及各焦点的光强变化规
Array Fresnel zone plates splitting wavefront and the Southwell model of zonal wavefront reconstruction arithmetic are presented, the effect of the sub-apertures of wavefront sensor and variation range of distorted phase on wavefront reconstruction are analyzed in detail, and a suitable number 20×20～30×30 of array Fresnel zone plates is g.
采用阵列菲涅耳波带片作为激光束波前传感的子孔径分割器,利用区域重构的Southwell模型进行波前重构。