Results 1 to 10 of about 2,574,547 (240)

Optical trapping and manipulation [PDF]

, 1999
A number of applications of microsystem technology require manipulation with high accuracy. Microreactors and microdiagnostic devices can be easily constructed with millimetre accuracy [1], but micrometre precision appears also to be realistic (see for example Fig. 3 below).
core   +7 more sources

An Asymmetric Feature Enhancement Network for Multiple Object Tracking of Unmanned Aerial Vehicle

Remote Sensing, 2023
Multiple object tracking (MOT) in videos captured by unmanned aerial vehicle (UAV) is a fundamental aspect of computer vision. Recently, the one-shot tracking paradigm integrates the detection and re-identification (ReID) tasks, striking a balance ...
Jianbo Ma, Dongxu Liu, Senlin Qin, Ge Jia, Jianlin Zhang, Zhiyong Xu   +5 more
doaj   +1 more source

Giant Optical Manipulation

Physical Review Letters, 2010
We demonstrate a new principle of optical trapping and manipulation increasing more than 1000 times the manipulation distance by harnessing strong thermal forces while suppressing their stochastic nature with optical vortex beams. Our approach expands optical manipulation of particles into a gas media and provides a full control over trapped particles,
Shvedov, Vladlen, Rode, Andrei V, Izdebskaya, Yana, Desyatnikov, Anton S, Krolikowski, Wieslaw, Kivshar, Yuri   +5 more
openaire   +3 more sources

Optical metasurfaces for generating and manipulating optical vortex beams [PDF]

Nanophotonics, 2022
Abstract Optical vortices (OVs) carrying orbital angular momentum (OAM) have attracted considerable interest in the field of optics and photonics owing to their peculiar optical features and extra degree of freedom for carrying information.
Hammad Ahmed, Hongyoon Kim, Yuebian Zhang, Yuttana Intaravanne, Jaehyuck Jang, Junsuk Rho, Shuqi Chen, Xianzhong Chen   +7 more
openaire   +4 more sources

Bayesian Model for 3D Undulating Terrain Depth Estimation Using Photon Counting LiDAR

Remote Sensing, 2023
Photon counting LiDAR can capture the 3D information of long-distance targets and has the advantages of high sensitivity and high resolution. However, the noise counts restrict improvements in the photon counting imaging quality.
Rui Wang, Bo Liu, Zhikang Li, Hao Yi, Zeyu Guo, Zhen Chen   +5 more
doaj   +1 more source

A Method Based on Time-Scale Factor for Correcting the Nonlinear Frequency Sweeping in an OFDR System

IEEE Photonics Journal, 2019
A data processing method for correcting the frequency sweeping nonlinearity of a tunable laser in an optical frequency domain reflectometry system is presented.
Jingjing Xing, Ying Zhang, Feng Wang, Kunpeng Feng, Yixin Zhang, Zhijun Yan, Xuping Zhang   +6 more
doaj   +1 more source

Plasma Figure Correction Method Based on Multiple Distributed Material Removal Functions

Micromachines, 2023
In the process of plasma figure correction for a quartz sub-mirror, the plasma parallel removal process and ink masking layer are combined for the first time.
Xiang Wu, Bin Fan, Qiang Xin, Qian Luo, Junming Shao, Guohan Gao, Peiqi Jiao   +6 more
doaj   +1 more source

Performance Optimization for Phase-Sensitive OTDR Sensing System Based on Multi-Spatial Resolution Analysis

Sensors, 2018
This paper proposes and demonstrates a phase-sensitive optical time domain reflectometry (Φ-OTDR) sensing system with multi-spatial resolution (MSR) analysis property.
Yuanyuan Shan, Wenbin Ji, Qing Wang, Lu Cao, Feng Wang, Yixin Zhang, Xuping Zhang   +6 more
doaj   +1 more source

Using an Auxiliary Mach–Zehnder Interferometer to Compensate for the Influence of Laser-Frequency-Drift in Φ-OTDR

IEEE Photonics Journal, 2019
In phase-sensitive optical time-domain reflectometry (Φ-OTDR), the frequency drift of the laser source induces the fluctuation of signal, which limits the measurement capacity of Φ-OTDR for low frequency severely.
Quan Yuan, Feng Wang, Tao Liu, Yixin Zhang, Xuping Zhang   +4 more
doaj   +1 more source

Improved spatiotemporal resolution of anti-scattering super-resolution label-free microscopy via synthetic wave 3D metalens imaging

Opto-Electronic Science, 2023
Super-resolution (SR) microscopy has dramatically enhanced our understanding of biological processes. However, scattering media in thick specimens severely limits the spatial resolution, often rendering the images unclear or indistinguishable ...
Yuting Xiao, Lianwei Chen, Mingbo Pu, Mingfeng Xu, Qi Zhang, Yinghui Guo, Tianqu Chen, Xiangang Luo   +7 more
doaj   +1 more source