Results 51 to 60 of about 879,303 (290)
Focusing characteristics of cylindrically bent Laue crystals
Physical Review ResearchBased on paraxial optics and the Takagi-Taupin theory, we establish an analytical framework for cylindrically bent Laue crystals that treats them as bulk diffraction devices and decomposes their behavior into geometric, kinematical, and higher-order ...
Yu-Hang Wang, Ming Li, Quan-Jie Jia
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Polishing mechanism of light-initiated dental composite: Geometric optics approach
Journal of the Formosan Medical Association, 2016 For light-initiated dental hybrid composites, reinforcing particles are much stiffer than the matrix, which makes the surface rugged after inadequate polish and favors bacterial adhesion and biofilm redevelopment.
Yu-Chih Chiang +2 more
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Advanced Engineering Materials, EarlyView.A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora +4 more
wiley +1 more source
An Eulerian numerical method for geometric optics
, 2002 The classical description for geometric optics is Lagrangian. It is possible to switch to an Eulerian representation but, in presence of caustics, the full Lagrangian solution cannot be computed using a Eulerian method.
Jean-David Benamou
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Advanced Engineering Materials, EarlyView.Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios +5 more
wiley +1 more source
A theorem in geometrical optics
Proceedings of the Physico-Mathematical Society of Japan. 3rd Series, 1941 Not ...
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
Lensing Point-spread Function of Coherent Astrophysical Sources and Nontrivial Wave Effects
The Astrophysical JournalMost research on astrophysical lensing has been conducted using the geometric optics framework, where there exists a clear concept of lensing images. However, wave optics effects can be important for coherent sources, e.g., pulsars, fast radio bursts ...
Xun Shi
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Determination of Angle of Refraction in X-Ray Phase-Contrast Imaging Using Geometric Optics Method
PhotonicsThe accurate calculation of the angle of refraction of X-rays passing through an object is essential in X-ray phase-contrast imaging. While the wave optics-based method is commonly employed to calculate the angle of refraction, it presents several ...
Jun Yang +4 more
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The two reflector design problem for forming a flat wavefront from a point source as an optimal mass transfer problem [PDF]
Компьютерная оптика, 2019 The article deals with a problem of calculating two reflecting surfaces that form a given irradiance distribution with a flat wavefront, provided that a point source of light is used. A notion of a weak solution for the said problem is formulated and the
Albert Mingazov +3 more
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