菲涅耳数字全息二次爆光的可视化研究

Visualization Algorithms of Digital Reconstruction & Double-Exposure Based on Fresnel Holography

目前关于菲涅耳数字全息二次曝光可视化研究的可查文献极少,而二次曝光可视化计算在干涉计量、形变测试、细胞检测、粒子场测量等领域有着潜在应用.文中以菲涅耳数字全息二次曝光可视化为研究对象,从菲涅耳近似及数字重构傅里叶近似入手,讨论菲涅耳数字全息的二次爆光叠加算法,构造二次爆光的可视化计算模型,通过计算机仿真菲涅耳光学衍射及光学全息的二次曝光过程,借助中值滤波消除零级衍射亮斑和明暗孤立点,能较好地仿真光学衍射过程,可视化效果较为逼真;利用全息图叠加算法替代光学全息的二次曝光,实现振幅干涉和相位干涉的可视化计算.

There is currently less study related to the digital reconstruction visualization of Fresnel holography.Researching visual computation of Fresnel holographic reconstruction and double-exposure,and putting forward Fresnel approximation,superposition calculation and Median filtering,the process of Fresnel optical holography diffraction and double-exposure are directly simulated by technologies of computer graphics.The test results are well in accord with those of the optical holographic diffraction and the visual effects are vivid highly.