数字全息参数优化

发布时间：2017-12-28 18:24

本文关键词：数字全息参数优化　出处：《西安科技大学学报》2017年01期 　论文类型：期刊论文

【摘要】：为了提高数字全息图的质量,文中从菲涅尔衍射积分出发,从理论上分析重构距离对全息图质量的影响。采用重构图的平均梯度为判断重构距离的标准,并通过参数调整重构距离的精度,提出了自动调整重构距离的方法,并设计离轴数字全息光路对其进行实验。实验结果表明:该方法可以显著提高全息图的质量。其中为了避免物光受共轭物光与零级像的干扰,在衍射场宽度的基础上,建立了CCD平面、重建像与参考光方向的模型,通过分析参考光与各个坐标轴之间的角度,推导出参考光角度的公式,通过分析与实验表明公式对参考光角度的可控性。
[Abstract]:In order to improve the quality of the digital hologram, the influence of the reconstructed distance on the quality of the hologram is theoretically analyzed from the Finel diffraction integral. The average gradient of reconstructed image is used to determine the standard of reconstruction distance, and the accuracy of reconstruction distance is adjusted through parameter adjustment. A method of automatically adjusting and reconstructing distance is proposed, and the off-axis digital holographic optical path is designed for its experiment. The experimental results show that the quality of the hologram can be greatly improved by this method. In order to avoid interference of light by conjugate light and zero order image, based on the width of the diffraction field, a CCD plane, and the direction of the reference light reconstruction model, through the analysis between the reference light and every axis angle, deduces the reference light angle formula, through the analysis and experiment show that the controllable the formula of the reference light angle.
【作者单位】：西安科技大学机械工程学院;
【分类号】：O438.1
【正文快照】： 0引言数字全息技术是利用光敏电子成像器件取代了传统全息记录介质来记录全息图,并完成全息图的数字化,然后利用计算机模拟全息图的衍射成像过程实现原始物光波的数字再现。近年,随着计算机特别是高分辨率CCD的发展[1-3],数字全息技术及其应用研究备受关注,其应用范围涉及形貌

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