Results 41 to 50 of about 36,249 (243)

Polynomial fit of interferograms [PDF]

open access: yesApplied Optics, 1982
Polynomial fit of interferograms is analyzed quantitatively. The errors from polynomial fit, such as fit error, digitization error, roundoff error, and finite sampling error, are explained. The advantage of using orthonormal polynomials are presented.
openaire   +2 more sources

Biosensing Using Microring Resonator Interferograms [PDF]

open access: yesSensors, 2014
Optical low-coherence interferometry (OLCI) takes advantage of the variation in refractive index in silicon-wire microring resonator (MRR) effective lengths to perform glucose biosensing using MRR interferograms. The MRR quality factor (Q), proportional to the effective length, could be improved using the silicon-wire propagation loss and coupling ...
Hsu, Shih-Hsiang   +5 more
openaire   +3 more sources

Single Exposure Phase-Only Optical Image Encryption and Hiding Method via Deep Learning

open access: yesIEEE Photonics Journal, 2022
Phase-only optical image security technology Based on one-time pad is an encryption and hiding method by introducing random key through phase modulation, which can improve the security of the system to a great extent. The application of traditional phase-
Qinnan Zhang, Jiaosheng Li
doaj   +1 more source

Quantised Vortices in an Exciton-Polariton Fluid [PDF]

open access: yes, 2008
One of the most striking quantum effects in a low temperature interacting Bose gas is superfluidity. First observed in liquid 4He, this phenomenon has been intensively studied in a variety of systems for its amazing features such as the persistence of ...
A Baas   +36 more
core   +4 more sources

Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers [PDF]

open access: yes, 2015
We present a setup for complete characterization of femtosecond pulses generated by seeded free-electron lasers (FEL's) in the extreme-ultraviolet spectral region.
Dacasa, Hugo   +8 more
core   +3 more sources

Effects of Irregular Bathymetry on Hologram Formation of Moving Source in Shallow Water

open access: yesJournal of Marine Science and Engineering
This paper examines the effect of irregular bathymetry on the holographic reconstruction of the sound field generated by a moving source in shallow water. In this scenario, acoustic waves propagate along the path between the source and receiver.
Sergey Pereselkov   +5 more
doaj   +1 more source

Online Correction Method for the Registration Error between TSMFTIS Detector and Interferogram

open access: yesSensors, 2020
Temporally-spatially modulated Fourier transform imaging spectrometers (TSMFTISs) provide high-throughout-type push-broom spectrometry with both temporal and spatial modulation features.
Jun Cao   +4 more
doaj   +1 more source

A comprehensive dataset of surface deformation satellite maps of the valley of Toluca, Mexico

open access: yesData in Brief, 2023
This work presents a substantial compilation of ground deformation maps portraying the dynamic evolution of the Valley of Toluca (VT) in Mexico.
Iván Francisco-Valencia   +4 more
doaj   +1 more source

Improving InSAR geodesy using global atmospheric models [PDF]

open access: yes, 2014
Spatial and temporal variations of pressure, temperature and water vapor content in the atmosphere introduce significant confounding delays in Interferometric Synthetic Aperture Radar (InSAR) observations of ground deformation and bias estimatesof ...
Agram, Piyush Shanker   +6 more
core   +4 more sources

Improved Goldstein Interferogram Filter Based on Local Fringe Frequency Estimation

open access: yesItalian National Conference on Sensors, 2016
The quality of an interferogram, which is limited by various phase noise, will greatly affect the further processes of InSAR, such as phase unwrapping. Interferometric SAR (InSAR) geophysical measurements’, such as height or displacement, phase filtering
Qingqing Feng   +5 more
semanticscholar   +1 more source

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