Cheng Jialuo, Geng Zihan, Zhou Yin, Luo Zhendong, Liu Xiaoyuan, Xiang Yinuo, Zhou Junxiao, Chen Mu Ku
Department of Electrical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China.
Institute of Data and Information, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong 518071, China.
Nanophotonics. 2025 Feb 17;14(8):1249-1256. doi: 10.1515/nanoph-2024-0661. eCollection 2025 Apr.
In traditional optical imaging, image sensors only record intensity information, and phase information of transparent samples such as cells and semiconductor materials is hard to obtain. Quantitative phase imaging techniques are crucial for obtaining detailed phase information, but current methods often require complex interferometric setups or mechanical adjustments, limiting their practical applicability. Here, we proposed a novel meta-device integrating a PB phase-based meta-lens, a refractive lens, and an electronically tunable lens with a polarization camera to capture multiple defocused images simultaneously for the transport of intensity equation-based phase retrieval algorithm. By leveraging the distinct focus lengths for left-circularly polarized and right-circularly polarized light, the meta-device eliminates the need for multiple shots and mechanical movements. Our approach enables rapid, precise, quantitative phase imaging at different depths. The experiment shows the accuracy of our methods is 98.47 % and with a 2.52 mm depth range of the objects that can be retrieved, making it highly suitable for dynamic and depth-varying samples, such as cells in solution.
在传统光学成像中，图像传感器仅记录强度信息，而诸如细胞和半导体材料等透明样本的相位信息很难获取。定量相位成像技术对于获取详细的相位信息至关重要，但目前的方法通常需要复杂的干涉设置或机械调整，限制了它们的实际应用。在此，我们提出了一种新型的超构器件，它集成了基于PB相位的超构透镜、折射透镜和电子可调透镜以及偏振相机，用于同时捕获多个散焦图像，以用于基于强度传输方程的相位检索算法。通过利用左旋圆偏振光和右旋圆偏振光不同的焦距，该超构器件无需多次拍摄和机械移动。我们的方法能够在不同深度实现快速、精确的定量相位成像。实验表明，我们方法的准确率为98.47%，可检索物体的深度范围为2.52毫米，这使其非常适用于动态和深度变化的样本，如溶液中的细胞。
