公开(公告)号：US11899354B1

公开(公告)日：2024-02-13

申请号：US18323125

申请日：2023-05-24

Applicant: EAST CHINA NORMAL UNIVERSITY

Inventor： Shi'an Zhang ,  Dalong Qi ,  Pengpeng Ding ,  Yunhua Yao ,  Yilin He ,  Jiali Yao ,  Chengzhi Jin ,  Zihan Guo ,  Zhenrong Sun

IPC: G02B27/42 ,  G02B5/18 ,  G03B39/00 ,  G03B17/12 ,  G06F17/18 ,  H04N25/76 ,  H04N23/56 ,  H01L27/146

CPC classification number: G03B39/00 ,  G03B17/12 ,  G06F17/18 ,  H01L27/14627 ,  H04N23/56 ,  H04N25/76

Abstract: Disclosed is ultrafast photographing apparatus based on polarization-time mapping, which can obtain spatiotemporal (x, y, t) information of a dynamic scene by means of single exposure. The apparatus includes an active illumination system, a synchronous control system, a data acquisition system, and a data reconstruction system. Firstly, illumination light is generated by the active illumination system to irradiate on a dynamic scene; the synchronous control system is configured to control the single exposure of a camera; the data acquisition system is configured to acquire a two-dimensional image containing sixteen frames of spatiotemporal aliasing by means of polarization modulation and polarization filtering; and the data reconstruction system is configured to reconstruct the acquired image by using an iterative Tikhonov regularization algorithm, and finally to restore sixteen frames of original dynamic scenes with time series information.

公开(公告)号：US11313668B2

公开(公告)日：2022-04-26

申请号：US17223379

申请日：2021-04-06

Applicant: East China Normal University

Inventor： Shi'an Zhang ,  Dalong Qi ,  Chengzhi Jin ,  Yilin He ,  Chengshuai Yang ,  Fengyan Cao ,  Yunhua Yao ,  Yan Yang ,  Zhenrong Sun

IPC: G01B9/02015 ,  G01B9/02 ,  G01B9/0209 ,  G01J11/00

Abstract: The present disclosure provides a compressed ultrafast imaging velocity interferometer system for any reflector, comprising a light source and target system, an etalon interference system, a compressed ultrafast imaging system, a timing control system and a data processing system. An imaging device in the traditional imaging velocity interferometer system for any reflector is replaced by a compressed ultrafast imaging system, a compressed ultrafast Photography (CUP) is introduced in an imaging process, multi-frame images, i.e. three-dimensional images for two-dimensional space and one-dimensional time, are reconstructed via a single measurement by a CUP-VISAR two-dimensional ultrafast dynamic image imaging, a complete dynamic process of a two-dimensional interference fringes image is restored, and spatiotemporal evolution information of a shock wave is effectively acquired, improving an imaging performance of the imaging velocity interferometer system for any reflector in dimension, and achieving a goal that could not be achieved before.