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首页> 外文期刊>Optics Letters >Reconstructing unknown wavefronts by use of diffraction-intensity pattern subtraction
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Reconstructing unknown wavefronts by use of diffraction-intensity pattern subtraction

机译：利用衍射强度图样减法重建未知波前

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摘要

We propose an easy method for unknown wavefront reconstruction by a typical Fourier transform system based on an amplitude-only spatial light modulator (SLM). The Fourier transform of the diffraction intensity pattern on the backfocal plane is the autocorrelation of the wavefront-transmitted SLM. Two intensity patterns were recorded when we set the transmittance of one corner pixel on the SLM as 0 and 1, separately, under the condition that the transmittances of the other pixels equal 1. The complex amplitude of the wavefront-transmitted SLM can be extracted from the Fourier transform of the diffraction intensity pattern subtraction without complicated calculations. The simulation results certifying our theories are also given. Our method provides us with an easy way for detecting the wavefront with high speed and high quality in real time without the reference wave.
机译：我们提出了一种基于仅幅度空间光调制器（SLM）的典型傅里叶变换系统进行未知波前重建的简便方法。后焦平面上衍射强度图案的傅立叶变换是波前透射SLM的自相关。当我们将SLM上一个角像素的透射率分别设置为0和1时，在其他像素的透射率等于1的条件下，记录了两个强度模式。衍射强度图案相减的傅立叶变换，无需复杂的计算。仿真结果也证明了我们的理论。我们的方法为我们提供了一种无需参考波即可实时，快速，高质量地检测波前的简便方法。

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