发明人：杨健，武潺，艾丹妮，王涌天，宋红

申请日期：2022.06.15

摘要：基于局部结构矢量对齐的位姿配准方法及装置，能够提高US‑MR多模态图像配准精度，减少配准时长，从而满足临床需求。这种基于局部结构矢量对齐的位姿配准方法包括：(1)获取超声置信度纹理图；(2)定义一种图像块级别的局部结构矢量描述符LSVD，该描述符是由邻域像素间的自相似距离组成一个高维结构向量，通过计 ...

发明人：蒋强，苏照贤，刘江鸿，黄玲玲，王涌天

申请日期：2022.03.01

摘要：本实用新型涉及光学透镜成像技术领域，本实用新型具体公开了一种基于超表面的压电套管扫描式内窥成像装置，包括光源、光强探测器、信号处理单元、外壳总成及封装在所述外壳总成内的探测系统；所述探测系统包括导光光纤、摄像光纤、压电套管、梯度折射率光纤、超表面以及内窥镜保护壳，所述光源发出的光经过所述导光光纤照射 ...

发明人：黄玲玲，陈屿丰，赵睿哲，李晓炜，王涌天

申请日期：2022.07.06

摘要：本发明公开的一种基于抛物线相位超表面的频率色散器件，属于微纳光学、频率色散调控、光谱分析领域。本发明能够在可见光宽波段内，基于贝里相位对超表面相位调制，在超表面形成抛物线型相位分布，实现对入射光的色散和聚焦，光经超表面器件作用后聚焦的焦距与波长成反比例关系。超表面所采用的矩形柱超颖原子结构便于贝里相 ...

发明人：王涌天，邵龙，艾丹妮，杨健，宋红，范敬凡

申请日期：2022.08.17

摘要：基于自适应角点单应估计的增强现实标定方法与装置，方法包括：(1)利用线段形态约束算法识别跟踪标记的2D关键角点坐标；(2)获取CT影像，并进行颅颌面器官的分割和三维重建；(3)利用三维扫描仪获取双向跟踪标记与器官的三维模型；(4)基于跟踪标记的模板对上述扫描模型的跟踪标记3D角点进行提取；(5)将C ...

发明人：黄玲玲，张雪，王涌天

申请日期：2022.10.08

摘要：本发明公开的一种基于偏振双通道超颖表面的多层立体显示系统优化方法，属于微纳光学、立体显示光学成像领域。本发明在4F系统的频谱面位置布设具有多层立体显示功能的偏振双通道超颖表面，通过偏振双通道超颖表面将二维图像源信息进行三维空间排列以拓展图像信息的展示维度；立体显示超颖表面基于扭曲光栅的控制4F系统出 ...

作者：Zhao, Ruizhe;Wei, Qunshuo;Li, Yuzhao;Li, Xin;Geng, Guangzhou;Li, Xiaowei;Li, Junjie;Wang, Yongtian;Huang, Lingling （¹Beijing Engineering Research Center of Mixed Reality and Advanced Display, Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology ²Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences ³Laser Micro/Nano‐Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology）

出处：Laser & Photonics Reviews 2023

关键词：metasurfaces;polarization transformation;stereo Jones matrix holography

摘要：Metasurfaces have exhibited powerful abilities for manipulating multiple fundamental properties of light including amplitude, phase, polarization, and ...

作者：Wang, Xuehu;Yang, Jian;Ai, Danni;Zheng, Yongchang;Tang, Songyuan;Wang, Yongtian. （Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Electronics, Beijing Institute of Technology, Beijing 100081, China. Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Electronics, Beijing Institute of Technology, Beijing 100081, China. Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Electronics, Beijing Institute of Technology, Beijing 100081, China. Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China. Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Electronics, Beijing Institute of Technology, Beijing 100081, China. Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Electronics, Beijing Institute of Technology, Beijing 100081, China.）

出处：PLoS One 2015

关键词：Fígado/diagnóstico por imagem;Algoritmos;Humanos;Imageamento Tridimensional/métodos;Modelos Teóricos;Interpretação de Imagem Radiográfica Assistida por Computador/métodos;Tomografia Computadorizada por Raios X/métodos

摘要：This study proposes a novel adaptive mesh expansion model (AMEM) for liver segmentation from computed tomography images. The virtual deformable simple ...

作者：Yanfeng Tong;Jing Chen;Yongtian Wang （¹National Engineering Laboratory of Virtual Reality and Augmented Reality, School of Optics and Photonics, Beijing Institute of Technology, 100081, Beijing, China）

出处：Computer Communications 2023

摘要：Developments in 3D computer vision have advanced scene understanding and 3D modeling. Surface normal estimation is a basic task in these fields. In th ...

作者：Tianyou Li;Yanjie Chen;Yongtian Wang;Thomas Zentgraf;Lingling Huang （¹School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China ²Department of Physics, University of Paderborn, Warburger Straße 100, Paderborn 33098, Germany）

出处：Applied Physics Letters 2023

关键词：BROAD-BAND;PHASE DISCONTINUITIES;RESOLUTION

摘要：The achievement of a flat metasurface has realized extraordinary control over light–matter interaction at the nanoscale, enabling widespread use in im ...

作者：程德文，陈海龙，王涌天，杨通 （北京理工大学光电学院）

出处：Acta Optica Sinica 2023

关键词：光学设计；几何光学；成像系统；光学曲面；数理描述

摘要：为满足高性能光学系统的设计要求，需要研究面形灵活可控的光学曲面数理描述方法和其相应的分析及设计方法。具有更多自由度的复杂光学曲面可以有效提升光学系统的性能。简要讨论了光学曲面的数理描述方法；概括性地介绍了光学曲面数理描述方法的研究现状与进展，介绍了局部和整体面形控制方法，归纳总结了新的复杂光学曲面数 ...