AI 中文总结
该研究提出一种基于仅强度时空波前整形的相位检索方法，利用DMD的旋转激发图案提取时空散斑谐波分量，结合梯度优化算法，可免校准地定量估计并补偿不同空间频率的相位畸变，开辟了免校准相位检索的新途径。
AI 中文摘要
我们提出一种基于仅强度时空调制产生的谐波场表示的相位检索方法。周期性振幅角调制将相位信息编码为时间强度谐波，无需干涉测量、参考光束或校准的相位调制器即可实现波前重建。我们考虑可建模为相位板的无序系统，测量由数字微镜器件（DMD）产生的旋转激发图案在远场的强度图案。我们提取时空散斑的谐波分量，并利用基于梯度的优化算法，检索对应平面波照明的相机平面中的光学相位，以及代表无序系统的有效相位板。我们通过实验证明了该方法在定量估计和补偿相位畸变方面的准确性，该相位畸变范围从低空间频率像差到毛玻璃散射体的高频畸变。所提出的方法为仅使用强度测量的免校准相位检索开辟了新途径。
英文摘要
We introduce a phase retrieval method based on harmonic field representations generated by intensity-only spatiotemporal modulation. A periodic amplitude angular modulation encodes phase information into temporal intensity harmonics, enabling wavefront reconstruction without interferometry, reference beams, or a calibrated phase modulator. We consider a disordered system that can be modeled as a phase plate and measure the intensity pattern in the far field for a rotating excitation pattern generated by a digital micromirror device (DMD). We extract the harmonic components of the spatiotemporal speckle and exploit a gradient-based optimization algorithm to retrieve both the optical phase in the plane of the camera corresponding to a plane-wave illumination and the effective phase plate that represents the disordered system. We demonstrate experimentally the accuracy of the approach in quantitatively estimating and compensating for phase distortion ranging from low-spatial-frequency aberrations to high-frequency distortions of a ground-glass diffuser. The proposed approach establishes a new route toward calibration-free phase retrieval using intensity-only measurements.
Comments11 pages, 5 figures + Supplementary Material (7 pages, 7 figures)
