Results 21 to 30 of about 762,865 (262)

Phase-shifting algorithms with known and unknown phase shifts: comparison and hybrid

open access: yesOptics Express, 2022
The phase-shifting interferometry has been intensively studied for more than half a century, and is still actively investigated and improved for more demanding precision measurement requirements. A proper phase-shifting algorithm (PSA) for phase extraction should consider various error sources including (i) the phase-shift errors, (ii) the intensity ...
Yuchi Chen, Qian Kemao
openaire   +3 more sources

Pixelwise Phase Unwrapping Based on Ordered Periods Phase Shift

open access: yesSensors, 2019
The existing phase-shift methods are effective in achieving high-speed, high-precision, high-resolution, real-time shape measurement of moving objects; however, a phase-unwrapping method that can handle the motion of target objects in a real environment ...
Satoshi Tabata   +3 more
doaj   +1 more source

Flow Dynamics and Acoustics from Glottal Vibrations at Different Frequencies

open access: yesAcoustics, 2022
Glottal vibration is fundamental to breathing-related disorders and respiratory sound generation. However, responses of the flow and acoustics to glottal vibrations of different frequencies are unclear.
Jinxiang Xi   +3 more
doaj   +1 more source

Theory for the Beam Splitter in Quantum Optics: Quantum Entanglement of Photons and Their Statistics, HOM Effect

open access: yesMathematics, 2022
The theory of the beam splitter (BS) in quantum optics is well developed and based on fairly simple mathematical and physical foundations. This theory has been developed for any type of BS and is based on the constancy of the reflection coefficients R ...
Dmitry Makarov
doaj   +1 more source

Investigation of Quadrate Fresnel Zone Plates Fabricated by Femtosecond Laser Direct Writing

open access: yesApplied Sciences, 2022
The circular Fresnel zone plate (FZP) has been extensively used in micro-optics due to its outstanding focusing performance. Despite that, the curved edge of the circular zone has drawbacks limiting its use in terahertz imaging, array generator, and ...
Xiaoyan Sun   +3 more
doaj   +1 more source

Micro Phase Shifting

open access: yes2012 IEEE Conference on Computer Vision and Pattern Recognition, 2012
We consider the problem of shape recovery for real world scenes, where a variety of global illumination (inter-reflections, subsurface scattering, etc.) and illumination defocus effects are present. These effects introduce systematic and often significant errors in the recovered shape.
Gupta, Mohit, Nayar, Shree K.
openaire   +2 more sources

Transmission Phase Control of Annular Array Transducers for Efficient Second Harmonic Generation in the Presence of a Stress-Free Boundary

open access: yesApplied Sciences, 2021
The through-transmission (TT) method is mainly used to measure the amplitude of the second harmonic from which the acoustic nonlinear parameter is determined for early damage detection of materials.
Hyunjo Jeong, Hyojeong Shin
doaj   +1 more source

Polarization-induced phase shift of ultrafast photocurrents

open access: yesEPJ Web of Conferences, 2013
Shift and injection currents are known to occur for linearly and circularly polarized optical excitations of semiconductors, respectively. Here, we show with room-temperature experiments that for excitation of discrete transitions the frequency dynamics ...
Pierz K., Priyadarshi S., Bieler M.
doaj   +1 more source

To Shift or Not to Shift? Determinants and Consequences of Phase Shifting on Justice Judgments [PDF]

open access: yesAcademy of Management Journal, 2017
Building on fairness heuristic theory and dual-process theories of cognition, we examine individuals’ perceptions of phase shifting.
Soenen, Guillaume   +2 more
openaire   +4 more sources

PHASE ANGLE SHIFT AND SLOPE BASED RESTRAINT FOR INDIRECT SYMMETRICAL PHASE SHIFT TRANSFORMER PROTECTION

open access: yesJournal of Engineering and Sustainable Development
This study presents a method to limit the functioning of the differential relay during the different operating conditions of an Indirect Symmetrical Phase Shift Transformer (ISPST).
Shailendra Kumar Bhasker, Manoj Tripathy
doaj   +1 more source

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