Xiang Meng, Pan An, Zhao Yiyi, Fan Xuewu, Zhao Hui, Li Chuang, Yao Baoli
Opt Lett. 2021 Jan 1;46(1):29-32. doi: 10.1364/OL.409258.
Synthetic aperture radar can measure the phase of a microwave with an antenna, which cannot be directly extended to visible light imaging due to phase lost. In this Letter, we report an active remote sensing with visible light via reflective Fourier ptychography, termed coherent synthetic aperture imaging (CSAI), achieving high resolution, a wide field-of-view (FOV), and phase recovery. A proof-of-concept experiment is reported with laser scanning and a collimator for the infinite object. Both smooth and rough objects are tested, and the spatial resolution increased from 15.6 to 3.48 µm with a factor of 4.5. The speckle noise can be suppressed obviously, which is important for coherent imaging. Meanwhile, the CSAI method can tackle the aberration induced from the optical system by one-step deconvolution and shows the potential to replace the adaptive optics for aberration removal of atmospheric turbulence.
合成孔径雷达可以用天线测量微波的相位，但由于相位丢失，无法直接扩展到可见光成像。在本信函中，我们报告了一种通过反射傅里叶叠层成像实现的可见光主动遥感，称为相干合成孔径成像（CSAI），它实现了高分辨率、宽视场（FOV）和相位恢复。报道了一个用于无限远物体的激光扫描和准直器的概念验证实验。对光滑和粗糙物体都进行了测试，空间分辨率从15.6微米提高到3.48微米，提高了4.5倍。散斑噪声可以得到明显抑制，这对相干成像很重要。同时，CSAI方法可以通过一步去卷积解决光学系统引起的像差，并显示出取代自适应光学用于去除大气湍流像差的潜力。
