Snapshot multi-dimensional computational imaging through a liquid crystal diffuser  

作　　者：YUNSONG LEI QI ZHANG YINGHUI GUO MINGBO PU FANG ZOU XIONG LI XIAOLIANG MA XIANGANG LUO 

机构地区：[1]State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China [2]School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China [3]Tianfu Xinglong Lake Laboratory,Chengdu 610299,China

出　　处：《Photonics Research》2023年第3期I0048-I0061,共14页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61875253,62222513,U20A20217);National Key Research and Development Program of China(SQ2021YFA1401000);Sichuan Science and Technology Program(2021ZYCD001);Youth Innovation Promotion Association of the Chinese Academy of Sciences(2019371)。

摘　　要：Multi-dimensional optical imaging systems that simultaneously gather intensity,depth,polarimetric,and spectral information have numerous applications in medical sciences,robotics,and surveillance.Nevertheless,most current approaches require mechanical moving parts or multiple modulation processes and thus suffer from long acquisition time,high system complexity,or low sampling resolution.Here,a methodology to build snapshot multi-dimensional lensless imaging is proposed by combining planar-optics and computational technology,benefiting from sufficient flexibilities in optical engineering and robust information reconstructions.Specifically,a liquid crystal diffuser based on geometric phase modulation is designed to simultaneously encode the spatial,spectral,and polarization information of an object into a snapshot detected speckle pattern.At the same time,a post-processing algorithm acts as a special decoder to recover the hidden information in the speckle with the independent and unique point spread function related to the position,wavelength,and chirality.With the merits of snapshot acquisition,multi-dimensional perception ability,simple optical configuration,and compact device size,our approach can find broad potential applications in object recognition and classification.

关 键 词：SPECKLE crystal OPTICS 

分 类 号：O439[机械工程—光学工程] TP391.41[理学—光学]