منابع مشابه
Mems Measurement by Digital Holographic Microscope
A universal digital holographic microscope to measure shape and displacement of microelement and MEMS (MicroElectroMechnacalSystems) is presented. This device is designed to exploit a measurement for MEMS with either a smooth or a rough surface. The method is based on digital laser interferometry and digital laser speckle interferometry (TV holography) incorporated with optoelectronic devices i...
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We have developed a simple digital holographic PIV system for 3D measurement of turbulent and multiphase flow. This system records in-line holograms of tracer particles directly on a digital camera and reconstructs the 3D particle field numerically. Using a novel complex amplitude-based method, we are able to overcome the depth of focus problem and the speckle noise problem associated with the ...
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Introdouction: Canal length measurement is essential for proper endodontic treatment. Any error or miscalculation in working length determination, particularly in curved canals, can result in complications during or after root canal therapy. Digital radiography has enabled accurate measurement of curved canal length. In this study, we evaluated the accuracy of calibration of a complementary m...
متن کاملDigital In-line Holographic PIV for 3D Flow Measurement
We present the design and implementation of a digital in-line holographic PIV system for 3D flow measurements. This system records in-line holograms of tracer particles directly on a CCD camera and numerically reconstructs the holograms. The 3D position of particles is extracted from the reconstructed particle images, and velocity field is then obtained using an advanced particle tracking algor...
متن کاملHigh precision deformation measurement by digital phase shifting holographic interferometry.
A digital phase shifting technique capable of quantitatively determining the phase of holographic interferometric displacement fringes is presented. This technique uses computer control to take data and calculate surface deformation. The phase value at each detector point can be calculated by taking four successive intensity data frames with the reference phase shifted between each frame. The d...
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ژورنال
عنوان ژورنال: PhotonicsViews
سال: 2021
ISSN: 2626-1294,2626-1308
DOI: 10.1002/phvs.202100007