Results 31 to 40 of about 1,684,231 (305)
A monopole antenna at optical frequencies: single-molecule near-field measurements [PDF]
, 2007 We present a monopole antenna for optical frequencies (~600 THz) and discuss near-field measurements with single fluorescent molecules as a technique to characterize such antennas.
Hulst, Niek F. van +2 more
core +4 more sources
Sensors, 2020 The aim of Lab-on-a-chip systems is the downscaling of analytical protocols into microfluidic devices, including optical measurements. In this context, the growing interest of the scientific community in opto-microfluidic devices has fueled the ...
Riccardo Zamboni +5 more
doaj +1 more source
Tunable Optical Filters Using Compound Ring Resonators for DWDM [PDF]
, 2003 The device is based on a loop mirror in a ring resonator. The loop mirror allows tuning by changing the coupling coefficient of a directional coupler. The loop mirror is implemented using a Sagnac configuration to have the same optical path between the ...
Corredera, Pedro +3 more
core +3 more sources
Delta function of the Fourier transform [PDF]
E3S Web of ConferencesIn the analysis of the double window Fourier transform, it is found that both components of the direct transformation contain an equal amount of information sufficient to restore the original time signal. A double conversion diagram has been constructed.
Parfentyev Nikolay +2 more
doaj +1 more source
Measurement-efficient optical wavemeters
Optics Express, 2004 We describe a method for efficiently determining the wavelength of a monochromatic source and provide an experimental proof-of-concept. The photomeasurement efficiency for a wavemeter can be written as eta(N,q) = (1 + logqN)/m, where N is the number of spectral channels, q is the number of distinguishable output levels per photodetector, and m is the ...
P, Potuluri +3 more
openaire +2 more sources
Numerical Optical Centroid Measurements
, 2013 Optical imaging methods are typically restricted to a resolution of order of the probing light wavelength $\lambda_p$ by the Rayleigh diffraction limit. This limit can be circumvented by making use of multiphoton detection of correlated $N$-photon states,
Evers, Jörg, Gulfam, Qurrat-ul-Ain
core +1 more source
Swarm optimization for adaptive phase measurements with low visibility
, 2013 Adaptive feedback normally provides the greatest accuracy for optical phase measurements. New advances in nitrogen vacancy centre technology have enabled magnetometry via individual spin measurements, which are similar to optical phase measurements but ...
Berry, Dominic W. +1 more
core +1 more source
Trapping radioactive ^{82}Rb in an optical dipole trap and evidence of spontaneous spin polarization [PDF]
, 2007 Optical trapping of selected species of radioactive atoms has great potential in precision measurements for testing fundamental physics such as EDM, PNC and parity violating beta-decay asymmetry correlation coefficients.
D. Feldbaum +5 more
core +1 more source
Research of dispersion characteristics of optical glass
Компьютерная оптикаDispersion characteristics of optical glass are considered. An approach to research of dispersion characteristics of optical glass is proposed, requiring the measurement of the refractive index at only three wavelengths, which simplifies the measurement ...
A.I. Yurin, G.N. Vishnyakov, V.L. Minaev
doaj +1 more source
Evaluation of Velocity and Acceleration Effect on Mecanum Wheel Robot Positioning
International Journal of Applied Mechanics and Engineering, 2022 In this paper, a Mecanum wheel omnidirectional robotic platform made for taking measurements in harsh and dangerous conditions is introduced. Due to the necessity of highly accurate displacement of the platform for measuring the conditions at the exact ...
Aleksander Bączyk +2 more
doaj +1 more source