Three-dimensional position detection of optically trapped dielectric particles

2002 ◽  
Vol 91 (8) ◽  
pp. 5474-5488 ◽  
Author(s):  
Alexander Rohrbach ◽  
Ernst H. K. Stelzer
Keyword(s):  
Three Dimensional ◽  
Dielectric Particles ◽  
Position Detection ◽  
Optically Trapped

scholarly journals Magnetic Positioning Technique Integrated with Near-Field Communication for Wireless EV Charging

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1081 ◽  
Author(s):  
Zhongnan Qian ◽  
Rui Yan ◽  
Zeqian Cheng ◽  
Jiande Wu ◽  
Xiangning He
Keyword(s):  
Relative Position ◽  
Data Transmission ◽  
Power Efficiency ◽  
Near Field ◽  
Three Dimensional ◽  
Secondary Coil ◽  
Power Transfer ◽  
Electric Vehicle Charging ◽  
Position Detection ◽  
Positioning Method

For wireless electric vehicle charging, the relative position of the primary and secondary coils has significant impacts on the transferred power, efficiency and leakage magnetic flux. In this paper, a magnetic positioning method using simultaneous power and data transmission (SWPDT) is proposed for power coil alignment. Four signal coils are installed on the primary coil to detect the secondary coil position. By measuring the positioning signal amplitudes from the four signal coils, the power coil relative position can be obtained. Moreover, all the communication needed in the positioning process can be satisfied well by SWPDT technology, and no extra radio frequency (RF) communication hardware is needed. The proposed positioning method can work properly both in power transfer online condition and in power transfer offline condition. Thus, a highly integrated wireless charging system is achieved, which features simultaneous power transfer, data transmission and position detection. A positioning experimental setup is built to verify the proposed method. The experimental results demonstrate that the positioning resolution can be maintained no lower than 1 cm in a 1060 mm × 900 mm elliptical region for a pair of 510 mm × 410 mm rectangular power coils. The three-dimensional positioning accuracy achieves up to 1 cm.

scholarly journals Three-Dimensional Enantiomeric Recognition of Optically Trapped Single Chiral Nanoparticles

2018 ◽  
Vol 121 (2) ◽  
Author(s):  
Gabriel Schnoering ◽  
Lisa V. Poulikakos ◽  
Yoseline Rosales-Cabara ◽  
Antoine Canaguier-Durand ◽  
David J. Norris ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Enantiomeric Recognition ◽  
Optically Trapped

Determination and Correction of Position Detection Nonlinearity in Single Particle Tracking and Three-Dimensional Scanning Probe Microscopy

2004 ◽  
Vol 10 (4) ◽  
pp. 425-434 ◽  
Author(s):  
Christian Tischer ◽  
Arnd Pralle ◽  
Ernst-Ludwig Florin
Keyword(s):  
Optical Tweezers ◽  
Particle Tracking ◽  
Single Particle ◽  
Scanning Probe Microscopy ◽  
Three Dimensional ◽  
Single Particle Tracking ◽  
Scanning Probe ◽  
Detection Scheme ◽  
Probe Microscopy ◽  
Position Detection

A general method is presented for determining and correcting nonlinear position detector responses in single particle tracking as used in three-dimensional scanning probe microscopy based on optical tweezers. The method uses locally calculated mean square displacements of a Brownian particle to detect spatial changes in the sensitivity of the detector. The method is applied to an optical tweezers setup, where the position fluctuations of a microsphere within the optical trap are measured by an interferometric detection scheme with nanometer precision and microsecond temporal resolution. Detector sensitivity profiles were measured at arbitrary positions in solution with a resolution of approximately 6 nm and 20 nm in the lateral and axial directions, respectively. Local detector sensitivities are used to reconstruct the real positions of the particle from the measured position signals.

Anomalous behavior of a three-dimensional, optically trapped, super-paramagnetic particle

2014 ◽  
Author(s):  
Martin Siler ◽  
Petr Jákl ◽  
Oto Brzobohatý ◽  
Jan Jezek ◽  
Pavel Zemánek
Keyword(s):  
Three Dimensional ◽  
Anomalous Behavior ◽  
Paramagnetic Particle ◽  
Optically Trapped

scholarly journals Optical Phenomena in Mesoscale Dielectric Particles

Photonics ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 591
Author(s):  
Oleg V. Minin ◽  
Igor V. Minin
Keyword(s):  
Three Dimensional ◽  
Field Enhancement ◽  
Super Resolution ◽  
Size Parameter ◽  
Dielectric Particles ◽  
Mesoscale Structures ◽  
Dimensional Shape ◽  
Resolution Imaging ◽  
Physical Phenomena ◽  
Three Dimensional Shape

During the last decade, new unusual physical phenomena have been discovered in studying the optics of dielectric mesoscale particles of an arbitrary three-dimensional shape with the Mie size parameter near 10 (q~10). The paper provides a brief overview of these phenomena from optics to terahertz, plasmonic and acoustic ranges. The different particle configurations (isolated, regular or Janus) are discussed, and the possible applications of such mesoscale structures are briefly reviewed herein in relation to the field enhancement, nanoparticle manipulation and super-resolution imaging. The number of interesting applications indicates the appearance of a new promising scientific direction in optics, terahertz and acoustic ranges, and plasmonics. This paper presents the authors’ approach to these problems.

Sign in / Sign up

Export Citation Format

Share Document