基于正弦光栅调制的相位恢复

Phase Recovery on Sinusoidal Optical Grating Modulation

提出一种基于正弦光栅调制的相位恢复方法.首先,在空间光调制器上加载两个不同方向的正弦光栅对光场复振幅进行调制;然后,推导强度信息和相位偏导数之间的关系式;最后由强度信息计算相位偏导数,进而恢复相位.实验分别测试了该方法对简单图像、复杂图像以及含噪声图像的恢复能力.实验结果表明,该方法可以通过方便地控制图像移动量来有效恢复相位信息,适用于不同尺度的相位物体的计算.

A phase recovery method based on sinusoidal optical grating modulation was proposed.Firstly,the complex amplitude of the optical field was modulated by two different directions sinusoidal gratings located at the spatial light modulator.Secondly,relationship between the intensity and the partial derivative of the phase was derivate.Last,the partial derivative of the phase was calculated using intensity images,and then the phase information was recovered.The simulation experiments were carried out to test the recovery ability of the method for simple images,complex images and noisy images.The results show that the proposed method could recover phase information effectively by expediently control the image motion,which applies to the calculation of the phase objects of different scales.