作者: 高原,张子龙,田顺,赵苏怡,赵长明 (北京理工大学光电学院;光电成像技术与系统教育部重点实验室;信息光子技术工业与信息化部重点实验室)
出处: 光学学报 2022 第42卷 第2期 P235-241
关键词: 物理光学;涡旋光束;拓扑荷调制;衍射;螺旋微孔阵列
摘要: 从理论和实验上研究涡旋光束通过具有费马螺线分布微孔结构的衍射板后拓扑荷数的变化情况,以及光束强度分布的衍射和聚焦特性。利用一个正透镜对衍射光束进行聚焦,观察和研究聚焦光束在焦平面后一定范围内的光强分布变化情况。衍射光束的最内环光强分布在束腰前后约有五个变化阶段。这一变化趋势适用于涡旋光束通过微孔沿不 ...
作者: Junjie Wu1;Yufei Sun2;Peng Guo1;Lihui Feng1;Yongbin Zhang3;Youqi Zhang3; (1key laboratory of photonics information technology, ministry of industry and information technology, school of optics and photonics, Beijing Institute of Technology, Beijing 100086, China. ;2key laboratory of photonics information technology, ministry of industry and information technology, school of optics and photonics, Beijing Institute of Technology, Beijing 100086, China and Chongqing Liangjiang Satellite Mobile Communication Co., Ltd., Chongqing, 401135, China. ;3Beijing Chenjing Electronics Limited Company, Beijing 100020, China.)
出处: IEEE Sensors Journal 2022 P1
关键词: Interference;Micromechanical devices;Vibrations;Gyroscopes;Resonant frequency;Acoustics;Accelerometers
摘要: The mechanical structure of MEMS inertial sensors is a spring-mass-damper system, which is susceptible to interference near the resonant frequency. Th ...
作者: 陈思颖,年璇,陈和,张寅超,郭磐 (北京理工大学光电学院光电成像技术与系统教育部重点实验室)
出处: 北京理工大学学报 2022 第5期
关键词: 激光雷达;纯转动拉曼散射;残余几何因子;温度
摘要: 拉曼-米激光雷达高低阶拉曼通道的几何因子因不同通道光学器件和探测器的性能差异并非完全一致,会引入近地面温度测量误差,针对这一问题,提出一种修正测温通道残余几何因子的方法. 该方法首先通过探空温度和标定的归一化光谱透过率计算得到高低阶拉曼信号的有效微分散射截面之比,然后从拉曼信号比值中求解出残余几何因 ...
作者: 张可欣,王凯鑫,高春清 (北京理工大学光电学院;信息光子技术工业和信息化部重点实验室)
出处: 光学学报 2022 第42卷 第5期 P138-144
关键词: 激光器;Er,Yb∶glass;多程;板条放大器;热效应
摘要: 设计了一种LD阵列泵浦的铒镱共掺磷酸盐玻璃(Er, Yb∶glass)板条放大器,通过多次折叠反射结构来提高能量提取效率,实现1.5μm波段较大能量的激光输出,激光放大增益可达35.29倍。基于稳态热传导理论,对所设计的Er, Yb∶glass板条放大器进行了热效应分析,建立了热力耦合模型,采用有限 ...
作者: 巴图巴雅尔·欧赟,赵跃进,孔令琴,董立泉,刘明,惠梅 (北京理工大学光电学院北京100081)2)(北京理工大学精密光电测试仪器及技术北京市重点实验室北京100081)3)(北京理工大学长三角研究院(嘉兴))
出处: 物理学报 2022 第5期
关键词: 人脸视频,非接触式心率检测,头部旋转运动,自适应Kalman;滤波器
摘要: 基于人脸视频的生理信号检测面临的主要挑战是运动伪影噪声.针对受试者头部刚性旋转运动引起的伪影噪声,本文提出利用头部运动信息构建自适应滤波器的非接触式心率检测方法.该方法利用人脸二维和三维的特征点计算受试者运动中头部的偏航和俯仰欧拉角度,并将其作为调控过程噪声协方差的信号质量指数,进而构建了自适应Ka ...
作者: 刘志豪,金伟其,李力,沙漠洲,郭勤 (北京理工大学光电学院光电成像技术与系统教育部重点实验室;北京机电工程研究所)
出处: 光学精密工程 2022 第30卷 第1期 P1-11
关键词: 光电成像;多波段成像;非制冷红外焦平面阵列;图像融合;双波段红外测温
摘要: 为获取以及充分利用场景的多波段信息,同时为多波段图像算法研究奠定基础,基于非制冷红外焦平面阵列,研制了共光轴分束的可见光+近红外、短波红外、中波红外和长波红外四波段光电成像实验平台。给出了基于四波段光电成像实验平台的图像处理案例,使用现场可编程门阵列完成各路图像的预处理与多波段图像融合。预处理过程主 ...
作者: Ke, Jun1; Alieva, Tatiana2; Oktem, Figen S.3; Silveira, Paulo E.X.4; Wetzstein, Gordon5; Willomitzer, Florian6
会议录: Vol.61 No.9 COSI1-COSI4
作者: Zhao, Yinming1, 2; Wang, Zhigang3; Tan, Siyang3; Liu, Yang3; Chen, Si2; Li, Yongqian3; Hao, Qun1 (1School of Optoelectronics, Beijing Institute of Technology, No.5 South Zhongguancun Street, Haidian District, Beijing; 100081, China;2Beijing Changcheng Institute of Metrology & Measurement, Beijing; 100095, China;3Key Laboratory of Micro/Nano Systems for Aerospace of Ministry of Education, Northwestern Polytechnical University, Xian; 710072, China)
出处: Micromachines 2022 Vol.13 No.2
作者: Cui, Yanyan1; Li, Mengke1; Zhu, Nali2; Cheng, Yan1, 3; Lam, Su Shiung4; Chen, Jun5; Gao, Yuxi5; Zhao, Jiating5 (1Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optoelectronics, Beijing Institute of Technology, Beijing; 100081, China;2School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou; 310024, China;3CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Chinese Academy of Sciences (CAS), Beijing; 100190, China;4Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, Terengganu, Kuala Nerus; 21030, Malaysia;5CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS), Beijing; 100049, China)
出处: Nano Today 2022
作者: Gao, Yuan1, 2, 3; Zhang, Zilong1, 2, 3; Tian, Shun1, 2, 3; Zhao, Suyi1, 2, 3; Zhao, Changming1, 2, 3 (1School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China;2Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of People's Republic of China, Beijing; 100081, China;3Key Laboratory of Photonics Information Technology, Ministry of Industry and Information Technology, Beijing; 100081, China)
出处: Guangxue Xuebao/Acta Optica Sinica 2022 Vol.42 No.2