Kim Taewoo, Liang Jinyang, Zhu Liren, Wang Lihong V
Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering, California Institute of Technology, 1200 East California Boulevard, Mail Code 138-78, Pasadena, CA 91125, USA.
Department of Electrical Engineering, California Institute of Technology, 1200 East California Boulevard, Mail Code 138-78, Pasadena, CA 91125, USA.
Sci Adv. 2020 Jan 17;6(3):eaay6200. doi: 10.1126/sciadv.aay6200. eCollection 2020 Jan.
With the growing interest in the optical imaging of ultrafast phenomena in transparent objects, from shock wave to neuronal action potentials, high contrast imaging at high frame rates has become desirable. While phase sensitivity provides the contrast, the frame rates and sequence depths are highly limited by the detectors. Here, we present phase-sensitive compressed ultrafast photography (pCUP) for single-shot real-time ultrafast imaging of transparent objects by combining the contrast of dark-field imaging with the speed and the sequence depth of CUP. By imaging the optical Kerr effect and shock wave propagation, we demonstrate that pCUP can image light-speed phase signals in a single shot with up to 350 frames captured at up to 1 trillion frames per second. We expect pCUP to be broadly used for a vast range of fundamental and applied sciences.
随着人们对透明物体中超快现象（从冲击波到神经元动作电位）的光学成像兴趣日益浓厚，以高帧率进行高对比度成像变得很有必要。虽然相位灵敏度提供了对比度，但帧率和序列深度受到探测器的极大限制。在此，我们展示了相敏压缩超快摄影（pCUP），通过将暗场成像的对比度与压缩超快摄影（CUP）的速度和序列深度相结合，对透明物体进行单次实时超快成像。通过对光学克尔效应和冲击波传播进行成像，我们证明pCUP能够单次成像光速相位信号，每秒高达1万亿帧的速度下可捕获多达350帧。我们期望pCUP能广泛应用于众多基础科学和应用科学领域。
