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基于电子学全息术 (又称数字全息术 )记录和再现光学全息图的原理和方法 ,设计了一种适合于用尺寸较小的 CCD靶面直接记录光学全息图的实验光路 ,并由此实现了三维物场清晰的分层再现。讨论了物场频谱的有效分离及提取方法 ,并提出了利用双参考光原理改善全息图再现像空间频谱带宽的新思路。与传统的光学全息术相比 ,电子学全息术借助于高分辨率 CCD记录及高速计算机数字处理技术 ,可以实现光学全息图的数字化记录和重现。同时在不改变光路的前提下 ,可以较高的重复频率完成光学全息图的记录 ,以便于记录三维物场的变化过程 ,并且可以接近实时地再现物场或对物场进行逐层分析 ,因而是一种准实时的新型全息成像技术。
Based on the principles and methods of recording and reproducing optical holograms based on electronic holography (also known as digital holography), an experimental optical path suitable for directly recording optical holograms with small CCD target surfaces is designed and implemented The three-dimensional object clear hierarchical reproduction. The effective separation and extraction methods of the object field spectrum are discussed. A new idea of using the double reference light principle to improve the spectral bandwidth of the hologram image space is proposed. Compared with the traditional optical holography, electronic holography with high-resolution CCD recording and high-speed computer digital processing technology, digital holographic optical recording and reproduction can be achieved. At the same time without changing the optical path under the premise of the higher repetition rate can complete the optical hologram recording, in order to record changes in the three-dimensional object field, and can be close to real-time reproduction of the object field or object layer by layer analysis, and therefore Is a real-time new holographic imaging technology.