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MATLAB 相移法 四步相移

于 2022-06-26 发布 文件大小:108.79 kB
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在全息的记录过程中加入相移技术,记录多幅全息图,再利用不同的相移算法,对所拍摄的多幅全息图进行处理,消除共轭像和零级亮斑,达到只重现原始像的目的。相移技术是通过给记录光路的参考光引入特定的相位变化 ,得到几幅有固定相位差的全息图,再把它们进行叠加,特定相位差的全息图在叠加过程中可能使得直透光和共轭像相互抵消而去除。其中最常用的是四步相移法。

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