نتایج جستجو برای: holography
تعداد نتایج: 9186 فیلتر نتایج به سال:
In digital holography holograms are recorded by a CCD and image reconstruction is performed by a computer. It is free from tedious photographic processing and delivers three-dimensional distributions of both amplitude and phase quantitatively. Its main limitation that is caused by much lower resolution of CCDs than photographic materials has been substantially overcome by phase-shifting digital...
Digital holography for 3D particle field extraction and tracking is an active research topic. It has a great application in realizing characterization of micro-scale structures in microelectromechanical systems (MEMS) with high resolution and accuracy. In-line configuration is studied in this study as the fundamental structure of a digital holography system. Digital holographic approach, not on...
Prediction of radiated sound from vibrating structures is required for structural design optimization and effective noise control. Techniques to predict the surface contributions to the radiated sound from a vibrating structure include the supersonic acoustic intensity, the surface contribution method and near-field acoustic holography. Near-field acoustic holography is an experimental methodol...
In the era of big data, there exists a growing gap between data generated and storage capacity using two-dimensional (2D) magnetic storage technologies (for example, hard disk drives), because they have reached their performance saturation. 3D volumetric all-optical magnetic holography is emerging rapidly as a promising road map to realizing high-density capacity for its fast magnetization cont...
Digital holography (DH) is the direct recording of the Fresnel or Fourier holograms using a CCD or CMOS camera and is considered as an alternative to the optical holography which uses a film or a plate involving wet-chemical or other processes. However, the poor pixel resolution of CCD or CMOS cameras as compared to that of holographic films gives poor depth resolution for images which in turn ...
In this paper, we study codimension two holography in flat spacetimes, based on the idea of wedge holography. We propose that a region $d+1$ dimensional spacetime surrounded by end world branes, which are given $d$ hyperbolic spaces, is dual to conformal field theory (CFT) $d\ensuremath{-}1$ sphere. Similarly, also bounded de Sitter spaces holographically CFT Our calculations partition function...
Real Time Temperature Distribution Measurement of a Microheater by Using Off-Axis Digital Holography
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