Yang Le, Yang Junpeng, Huang Tao, Rosen Joseph, Wang YuHeng, Wang Huiyang, Lu Xiaoxu, Zhang Weina, Di Jianglei, Zhong Liyun
Opt Lett. 2024 Aug 1;49(15):4429-4432. doi: 10.1364/OL.525898.
Interferenceless-coded aperture correlation holography (I-COACH) is a promising single-shot 3D imaging method in which a coded phase mask (CPM) is used to encode 3D information about an object into an intensity distribution. However, conventional CPM encoding methods usually lead to intensity dilution, especially in the recording of point spread holograms (PSHs), resulting in low-resolution reconstruction of I-COACH. Here, we propose accelerating quad Airy beams with four mainlobes as a point response to enable weak diffraction propagation and a sharp maximum intensity in the transverse direction. Moreover, the four mainlobes exhibit lateral acceleration in 3D space, so the PSHs in different axial positions show a unique and concentrated intensity distribution on the image sensor, thereby realizing a high-resolution reconstruction of I-COACH. Compared with conventional CPM encoding methods, the proposed accelerating quad Airy-beam-encoding method has superior performance in improving the resolution of I-COACH reconstruction even in the presence of external interference.
无干涉编码孔径相关全息术（I-COACH）是一种很有前景的单次三维成像方法，其中使用编码相位掩模（CPM）将关于物体的三维信息编码到强度分布中。然而，传统的CPM编码方法通常会导致强度稀释，尤其是在点扩散全息图（PSH）的记录中，从而导致I-COACH的低分辨率重建。在此，我们提出将具有四个主瓣的加速四艾里光束作为点响应，以实现弱衍射传播和横向方向上尖锐的最大强度。此外，四个主瓣在三维空间中表现出横向加速，因此不同轴向位置的PSH在图像传感器上显示出独特且集中的强度分布，从而实现I-COACH的高分辨率重建。与传统的CPM编码方法相比，所提出的加速四艾里光束编码方法即使在存在外部干扰的情况下，在提高I-COACH重建分辨率方面也具有卓越的性能。
