处理双曝光数字全息的一种新方法

发布时间：2018-04-01 17:14

本文选题：全息　切入点：差值数字全息法　出处：《西安科技大学学报》2017年05期

【摘要】：在分析传统双曝光全息术和常用数字全息干涉术不足的基础上,利用数字全息术在全息记录与数字处理方面的灵活性,提出了一种处理双曝光数字全息记录结果的新方法——差值数字全息法。该方法首先将记录物体变形前后物光波与参考光波干涉场的2个数字全息相减,形成差值数字全息;然后对差值数字全息直接进行模拟衍射再现,就可以得到物体变形前后2个物光波的高质量干涉条纹。与通常的双曝光数字全息干涉技术及叠加数字全息法相比较,差值数字全息法的优点在于,既不需要事先专门消除数字全息中的零级强度项,只需要一次再现过程,并且所得干涉条纹的质量较高。在给出处理双曝光数字全息干涉技术记录结果的叠加数字全息法和差值数字全息法原理之后,通过实验及对实验结果的对比证明了差值数字全息法的可行性与优越性。
[Abstract]:Based on the analysis of the shortage of traditional double exposure holography and digital holographic interferometry, the flexibility of digital holography in holographic recording and digital processing is used. In this paper, a new method for processing the results of double exposure digital holographic recording is proposed, which subtracts two digital holograms of object light wave and reference light wave interference field before and after object deformation, and forms differential digital holography. Then the difference digital holography is directly simulated and diffracted, and the high quality interference fringes of two light waves before and after the object deformation can be obtained, which is compared with the conventional double exposure digital holographic interferometry and superposition digital holographic method. The advantage of differential digital holography is that it is not necessary to eliminate the zero intensity term in digital holography in advance, but only one reproduction process is required. The principle of superposition digital holography and differential digital holography are given to process the results of double exposure digital holographic interferometry. The feasibility and superiority of the difference digital holography method are proved by the experiment and the comparison of the experimental results.
【作者单位】：西安建筑科技大学理学院;
【基金】：陕西省教育厅专项科研计划项目(2013JK0639)
【分类号】：O438.1

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