Department of Physics, Heze University, Heze 274015, China.
Opt Lett. 2010 Jul 1;35(13):2115-7. doi: 10.1364/OL.35.002115.
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.
我们提出了一种基于仅振幅空间光调制器（SLM）的典型傅里叶变换系统进行未知波前重建的简单方法。在后焦平面上的衍射强度图案的傅里叶变换是通过 SLM 传输的波前的自相关。当我们将 SLM 上一个角像素的透过率分别设置为 0 和 1 时，在其他像素的透过率均为 1 的条件下，分别记录两个强度图案。可以从没有复杂计算的衍射强度图案相减的傅里叶变换中提取出通过 SLM 传输的波前的复振幅。还给出了验证我们理论的模拟结果。我们的方法为实时、无需参考波的高速、高质量波前检测提供了一种简单的方法。
