CAJ | 학술논문

数字全息术开辟了全息术的新纪元，但实现数字全息术需解决许多关键技术。本文以CCD和EALCD为数字全息基本器件，从理论上和实验上研究实现数字全息的关键技术，即如何使光学系统满足时间相干度、空间相干度、空间带宽积、光束偏振度、条纹对比度、分辨率条件和物距条件，以达到高精度全息测试；并基于这些条件，设计了数字全息测试系统；应用该系统，实现了高清晰度数字全息再现。基于数字全息信息的数值特点，利用计算机技术，采用了Laplacian算子滤波，提高了干涉条纹的对比度，从而为提高测试精度提供了高对比度的干涉图。
수자전식술개벽료전식술적신기원，단실현수자전식술수해결허다관건기술。본문이CCD화EALCD위수자전식기본기건，종이론상화실험상연구실현수자전식적관건기술，즉여하사광학계통만족시간상간도、공간상간도、공간대관적、광속편진도、조문대비도、분변솔조건화물거조건，이체도고정도전식측시；병기우저사조건，설계료수자전식측시계통；응용해계통，실현료고청석도수자전식재현。기우수자전식신식적수치특점，이용계산궤기술，채용료Laplacian산자려파，제고료간섭조문적대비도，종이위제고측시정도제공료고대비도적간섭도。
Digital holography has opened up a new era of holography,but the realization of digital holography needs to solve many key technologies. Taking CCD and EALCD as basic digital holographic devices, the key techniques of dig-ital holography are researched theoretically and experimentally. The techniques include how to make optical system meet the requirements of temporal coherency,spacial coherency,space bandwidth product,light polarization degree,the con-trast of fringes, resolution conditions and distance conditions, in order to achieve high precision holographic testing. Based on these conditions,the digital holographic testing system was designed. The high précised digital holographic re-construction was realized by appling this holographic system. Based on the numerical characteristics of the digital holog-raphy, Laplacian operator is adopted for filtering to improve the contrast of fringes and therefor provide high-contrast interference figure for increasing the test accuracy by using computer .