公开(公告)号：US11187518B2

公开(公告)日：2021-11-30

申请号：US16676578

申请日：2019-11-07

Applicant: University of Southampton ,  Nanyang Technological University

Inventor： Nikolay Ivanovich Zheludev ,  Guanghui Yuan

IPC: G01B9/02

Abstract: A method of determining a displacement comprises: generating an interferometric superoscillatory field from coherent electromagnetic radiation, the interferometric superoscillatory field comprising an interference pattern between a reference field and a superoscillatory field; detecting with a detector a first set of intensity distributions of the interferometric superoscillatory field, each intensity distribution from a different polarisation state of the electromagnetic radiation; detecting with the detector a second set of intensity distributions of the interferometric superoscillatory field, each intensity distribution from the same polarisation states of the electromagnetic radiation as the first set of intensity distributions; extracting a first local wavevector distribution from the first set of intensity distributions and a second local wavevector distribution from the second set of intensity distributions; comparing the first local wavevector distribution and the second local wavevector distribution to identify any change in position of one or more features in the local wavevector distributions; and ascertaining that a lateral displacement has occurred between the interferometric superoscillatory field and the detector if a change in position is identified.

公开(公告)号：US12211241B2

公开(公告)日：2025-01-28

申请号：US17618607

申请日：2020-06-12

Applicant: University of Southampton ,  Nanyang Technological University

Inventor： Nikolay Ivanovich Zheludev ,  Guanghui Yuan ,  Nikitas Papasimakis ,  Vassily Savinov

IPC: G06V10/145 ,  G06V10/147 ,  G06V10/774 ,  G06V10/82 ,  G06V20/66 ,  G06V10/10

Abstract: A method of imaging comprises: generating a superoscillatory field from coherent electromagnetic radiation; placing an object in the superoscillatory field; detecting one or more intensity distributions of the superoscillatory field scattered by the object; and determining at least one characteristic of the object from the one or more intensity distributions.