Results 81 to 90 of about 44,997 (341)
High-resolution and broadband all-fiber spectrometers
, 2014 The development of optical fibers has revolutionized telecommunications by enabling long-distance broad-band transmission with minimal loss. In turn, the ubiquity of high-quality low-cost fibers enabled a number of additional applications, including ...
Alam, Mansoor +3 more
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Journal of Biomedical Optics, 2019 . Laser speckle contrast imaging (LSCI) enables video rate imaging of blood flow. However, its relation to tissue blood perfusion is nonlinear and depends strongly on exposure time.
Ingemar Fredriksson +3 more
semanticscholar +1 more source
Microsphere Autolithography—A Scalable Approach for Arbitrary Patterning of Dielectric Spheres
Advanced Functional Materials, EarlyView.MicroSphere Autolithography (µSAL) enables scalable fabrication of patchy particles with customizable surface motifs. Focusing light through dielectric microspheres creates well defined, tunable patches via a conformal poly(dopamine) photoresist. Nearly arbitrary surface patterns can be achieved, with the resolution set by the index contrast between ...
Elliott D. Kunkel +3 more
wiley +1 more source
Real-Time Laser Speckle Imaging of Blood Flow with High Gray Level and High Resolution
Shanghai Jiaotong Daxue xuebao, 2023 Laser speckle contrast imaging (LSCI) is a large measurement ranging, real-time, high spatial resolution optical imaging method. Exisiting reserches show that the low gray level (8-bit) and low resolution (752×480 pixels) camera can effectively monitor ...
ZHANG Zelong, ZHANG Yingchao, WU Bo, DONG Wei, FAN Youben
doaj +1 more source
Laser vibrometry meets laser speckle
SPIE Proceedings, 2004 This paper begins with a review of the fundamental mechanism by which speckle noise is generated in Laser Vibrometry before describing a new numerical simulation of speckle behavior for prediction of noise level in a real measurement. The simulation data provides real insight into the phase and amplitude modulation of the Doppler signal as a result of ...
Steve J. Rothberg, Benjamin J. Halkon
openaire +2 more sources
Plastic and Reconstructive Surgery, 2019 Summary: Adequate tissue perfusion is essential to minimize postoperative complications following microsurgery. Intraoperative knowledge of tissue perfusion could aid surgical decision-making and result in reduced complications.
Cynthia To +6 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.Controlled laser‐drilling of embedded HfO2 membranes creates three layer nanopores with Gaussian‐shaped cavities sculptured in the supporting layers. These embedded solid‐state nanopores slow DNA translocation by 12‐fold compared to SiNx pores, enabling high‐resolution, label‐free detection of short DNAs, RNAs, and proteins.
Jostine Joby +4 more
wiley +1 more source
Speckle Theory for Arbitrary Wavefront Illumination in Free-Space Surface Scattering
IEEE Photonics JournalSpeckle has been shown to cause significant degradation to the imaging quality of laser imaging systems. However, in certain complex imaging environments, it can also act as an effective information carrier.
Qiyong Xu +3 more
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Zwitterion-doped liquid crystal speckle reducers for immersive displays and vectorial imaging
Light: Science & Applications, 2023 Lasers possess many attractive features (e.g., high brightness, narrow linewidth, well-defined polarization) that make them the ideal illumination source for many different scientific and technological endeavors relating to imaging and the display of ...
Yihan Jin +6 more
doaj +1 more source
Objective speckle displacement resulting from the deformation of shaped objects [PDF]
, 2015 This paper describes an extended theory of the displacement of the objective speckle pattern resulting from displacement and/or deformation of a coherently illuminated diffuse object where the influence of the surface shape is included via the linear ...
Charrett, Thomas O. H., Tatam, Ralph P.
core +1 more source