Bibliographies thématiques / ULTRAFAST WIDE FIELD IMAGING

Littérature scientifique sur le sujet « ULTRAFAST WIDE FIELD IMAGING »

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Publié le 10 mars 2023

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Articles de revues sur le sujet "ULTRAFAST WIDE FIELD IMAGING"

Kang, Jinbum, Dooyoung Go, Ilseob Song et Yangmo Yoo. « Wide Field-of-View Ultrafast Curved Array Imaging Using Diverging Waves ». IEEE Transactions on Biomedical Engineering 67, n^o 6 (juin 2020) : 1638–49. http://dx.doi.org/10.1109/tbme.2019.2942164.

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Zanda, Gianmarco, Nicolas Sergent, Mark Green, James A. Levitt, Zdeněk Petrášek et Klaus Suhling. « Wide-field single photon counting imaging with an ultrafast camera and an image intensifier ». Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment 695 (décembre 2012) : 306–8. http://dx.doi.org/10.1016/j.nima.2011.11.087.

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Demené, Charlie, Mathieu Pernot, Valérie Biran, Marianne Alison, Mathias Fink, Olivier Baud et Mickaël Tanter. « Ultrafast Doppler Reveals the Mapping of Cerebral Vascular Resistivity in Neonates ». Journal of Cerebral Blood Flow & ; Metabolism 34, n^o 6 (26 mars 2014) : 1009–17. http://dx.doi.org/10.1038/jcbfm.2014.49.

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In vivo mapping of the full vasculature dynamics based on Ultrafast Doppler is showed noninvasively in the challenging case of the neonatal brain. Contrary to conventional pulsed-wave (PW) Doppler Ultrasound limited for >40 years to the estimation of vascular indices at a single location, the ultrafast frame rate (5,000 Hz) obtained using plane-wave transmissions leads to simultaneous estimation of full Doppler spectra in all pixels of wide field-of-view images within a single cardiac cycle and high sensitivity Doppler imaging. Consequently, 2D quantitative maps of the cerebro-vascular resistivity index (RI) are processed and found in agreement with local measurements obtained on large arteries of healthy neonates using conventional PW Doppler. Changes in 2D resistivity maps are monitored during recovery after therapeutic whole-body cooling of full-term neonates treated for hypoxic ischemic encephalopathy. Arterial and venous vessels are unambiguously differentiated on the basis of their distinct hemodynamics. The high spatial (250 × 250 μm2) and temporal resolution (<1 ms) of Ultrafast Doppler imaging combined with deep tissue penetration enable precise quantitative mapping of deep brain vascular dynamics and RI, which is far beyond the capabilities of any other imaging modality.

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Wang, Haoyuan, et Wei Xiong. « Vibrational Sum-Frequency Generation Hyperspectral Microscopy for Molecular Self-Assembled Systems ». Annual Review of Physical Chemistry 72, n^o 1 (20 avril 2021) : 279–306. http://dx.doi.org/10.1146/annurev-physchem-090519-050510.

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In this review, we discuss the recent developments and applications of vibrational sum-frequency generation (VSFG) microscopy. This hyperspectral imaging technique can resolve systems without inversion symmetry, such as surfaces, interfaces and noncentrosymmetric self-assembled materials, in the spatial, temporal, and spectral domains. We discuss two common VSFG microscopy geometries: wide-field and confocal point-scanning. We then introduce the principle of VSFG and the relationships between hyperspectral imaging with traditional spectroscopy, microscopy, and time-resolved measurements. We further highlight crucial applications of VSFG microscopy in self-assembled monolayers, cellulose in plants, collagen fibers, and lattice self-assembled biomimetic materials. In these systems, VSFG microscopy reveals relationships between physical properties that would otherwise be hidden without being spectrally, spatially, and temporally resolved. Lastly, we discuss the recent development of ultrafast transient VSFG microscopy, which can spatially measure the ultrafast vibrational dynamics of self-assembled materials. The review ends with an outlook on the technical challenges of and scientific potential for VSFG microscopy.

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Asif, Hira, et Ramazan Sahin. « Modulating the temporal dynamics of nonlinear ultrafast plasmon resonances ». Journal of Optics 24, n^o 4 (11 mars 2022) : 045003. http://dx.doi.org/10.1088/2040-8986/ac58a3.

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Abstract Surface plasmon-induced nonlinear optical resonances have shown immense potential in advanced optical imaging and nonlinear photonic devices. However, the ultrashort lifetime of these intense nonlinear fields inhibits their effective use in the vast applications of quantum plasmonics. Here, we propose enhancement in the lifetime of fast decaying second harmonic (SH) plasmon mode through a weak and pure resonant interaction with a two-level quantum emitter (QE). We compute the time evolution of SH response under a two-coupled oscillator model, in which we examine the interaction of short-lived SH mode supported by Au nanoparticle (AuNP) with long-lived dark mode (DM) or QE systems. To analyze the effect of spectral and temporal properties of DM and QE on the SH field, we evaluate the lifetime enhancement factor as a function of coupling strength and tuned resonant frequencies. The results show that tiny object like QE with sharp spectral bandwidth, small decay rate, and large oscillating strength is more efficient to control and probe the temporal dynamics of the SH field, as compared to DM which have a wide spectral bandwidth. Also, we control the lifetime of the SH mode after the natural decay time of the fundamental mode (FM), which distinguishes SH mode irrespective of its spatial convolution with elementary modes. Our proposed AuNP-QE coupled plasmonic system supporting nonlinear signal with enhanced temporal character paves its way for designing efficient on-chip nonlinear optical devices and can be a powerful tool in ultrahigh resolution nonlinear optical imaging.

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Hayashi, Shinichi, et Yasushi Okada. « Ultrafast superresolution fluorescence imaging with spinning disk confocal microscope optics ». Molecular Biology of the Cell 26, n^o 9 (mai 2015) : 1743–51. http://dx.doi.org/10.1091/mbc.e14-08-1287.

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Most current superresolution (SR) microscope techniques surpass the diffraction limit at the expense of temporal resolution, compromising their applications to live-cell imaging. Here we describe a new SR fluorescence microscope based on confocal microscope optics, which we name the spinning disk superresolution microscope (SDSRM). Theoretically, the SDSRM is equivalent to a structured illumination microscope (SIM) and achieves a spatial resolution of 120 nm, double that of the diffraction limit of wide-field fluorescence microscopy. However, the SDSRM is 10 times faster than a conventional SIM because SR signals are recovered by optical demodulation through the stripe pattern of the disk. Therefore a single SR image requires only a single averaged image through the rotating disk. On the basis of this theory, we modified a commercial spinning disk confocal microscope. The improved resolution around 120 nm was confirmed with biological samples. The rapid dynamics of microtubules, mitochondria, lysosomes, and endosomes were observed with temporal resolutions of 30–100 frames/s. Because our method requires only small optical modifications, it will enable an easy upgrade from an existing spinning disk confocal to a SR microscope for live-cell imaging.

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Phillips, David. « A lifetime in photochemistry ; some ultrafast measurements on singlet states ». Proceedings of the Royal Society A : Mathematical, Physical and Engineering Sciences 472, n^o 2190 (juin 2016) : 20160102. http://dx.doi.org/10.1098/rspa.2016.0102.

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We describe here the development of time-correlated single-photon counting techniques from the early use of spark discharge lamps as light sources through to the use of femtosecond mode-locked lasers through the personal work of the author. We used laser-excited fluorescence in studies on energy migration and rotational relaxation in synthetic polymer solutions, in biological probe molecules and in supersonic jet expansions. Time-correlated single-photon counting was the first method used in early fluorescence lifetime imaging microscopy (FLIM), and we outline the development of this powerful technique, with a comparison of techniques including wide-field microscopy. We employed these modern forms of FLIM to study single biological cells, and applied FLIM also to gain an understanding the distribution in tissue, and fates of photosensitizer molecules used in photodynamic therapy. We also describe the uses and instrumental design of laser systems for the study of ultrafast time-resolved vibrational spectroscopy.

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Ben Moussa, Olfa, Abderazek Talbi, Sylvain Poinard, Thibaud Garcin, Anne-Sophie Gauthier, Gilles Thuret, Philippe Gain, Aurélien Maurer, Xxx Sedao et Cyril Mauclair. « Characterization of Femtosecond Laser and Porcine Crystalline Lens Interactions by Optical Microscopy ». Micromachines 13, n^o 12 (1 décembre 2022) : 2128. http://dx.doi.org/10.3390/mi13122128.

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The use of ultrafast laser pulses for eye anterior segment surgery has seen a tremendous growth of interest as the technique has revolutionized the field, from the treatment of myopia, hyperopia, and presbyopia in the cornea to laser-assisted cataract surgery of the crystalline lens. For the latter, a comprehensive understanding of the laser–tissue interaction has yet to be achieved, mainly because of the challenge of observing the interaction zone in situ with sufficient spatial and temporal resolution in the complex and multi-layered tissue of the crystalline lens. We report here on the dedicated characterization results of the laser–tissue interaction zone in the ex vivo porcine lens using three different methods: in situ and real-time microscopy, wide-field optical imaging, and phase-contrast microscopy of the histological cross sections. These complementary approaches together revealed new physical and biological consequences of laser irradiation: a low-energy interaction regime (pulse energy below ~1 µJ) with very limited cavitation effects and a stronger photo-disruption regime (pulse energy above 1 µJ) with a long cavitation duration from seconds to minutes, resulting in elongated spots. These advances in the understanding of the ultrafast laser’s interactions with the lens are of the utmost importance for the preparation of the next-generation treatments that will be applied to the lens.

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Yang, Jinfeng. « New crystallography using relativistic femtosecond electron pulses ». Impact 2019, n^o 10 (30 décembre 2019) : 76–78. http://dx.doi.org/10.21820/23987073.2019.10.76.

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Ultrafast electron microscopy (UEM) with femtosecond temporal resolution has long been a cherished dream tool for scientists wishing to study ultrafast structural dynamics in materials, appealing to researchers from across a wide range of speciality areas. Associate Professor Jinfeng Yang, from the Institute of Scientific and Industrial Research, at Osaka University in Japan, leads a team working on ultrafast electron diffraction (UED) and ultrafast electron microscopy (UEM) development. 'Through the study of ultrafast phenomena with the UEM, we hope to gain a deeper understanding of materials and their physical properties and achieve a novel breakthrough in materials science,' he highlights. 'We fully expect to facilitate new knowledge and discoveries as a result of our work.' The team's work on relativistic UEM has led to the creation of unprecedented innovative technology that enables femtosecond atomic-scale imaging using just a single shot measurement. This will pave the way for the study of dynamics of irreversible processes within materials sciences. Not only does the group's work represent a huge step forward in innovative technology for researchers working across a number of scientific fields, but it is also progress in developing a very compact, ultra-high voltage electron microscopy. It can also be used in a variety of settings such as general research institutions and laboratories. In addition, through its provision of a solution to the problem of femtosecond temporal resolution our technology is breaking new ground in electronic microscopy developments,' says Yang.

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Su, Xinyang, Ruixue Zhu, Bolin Wang, Yu Bai, Tao Ding, Tianran Sun, Xing Lü, Jiying Peng et Yi Zheng. « Generation of 8–20 μm Mid-Infrared Ultrashort Femtosecond Laser Pulses via Difference Frequency Generation ». Photonics 9, n^o 6 (25 mai 2022) : 372. http://dx.doi.org/10.3390/photonics9060372.

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Mid-infrared (MIR) ultrashort laser pulses have a wide range of applications in the fields of environmental monitoring, laser medicine, food quality control, strong-field physics, attosecond science, and some other aspects. Recent years have seen great developments in MIR laser technologies. Traditional solid-state and fiber lasers focus on the research of the short-wavelength MIR region. However, due to the limitation of the gain medium, they still cannot cover the long-wavelength region from 8 to 20 µm. This paper summarizes the developments of 8–20 μm MIR ultrafast laser generation via difference frequency generation (DFG) and reviews related theoretical models. Finally, the feasibility of MIR power scaling by nonlinear-amplification DFG and methods for measuring the power of DFG-based MIR are analyzed from the author’s perspective.

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Thèses sur le sujet "ULTRAFAST WIDE FIELD IMAGING"

Iacchetta, Alexander S. « Spatio-Spectral Interferometric Imaging and the Wide-Field Imaging Interferometry Testbed ». Thesis, University of Rochester, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10936092.

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The light collecting apertures of space telescopes are currently limited in part by the size and weight restrictions of launch vehicles, ultimately limiting the spatial resolution that can be achieved by the observatory. A technique that can overcome these limitations and provide superior spatial resolution is interferometric imaging, whereby multiple small telescopes can be combined to produce a spatial resolution comparable to a much larger monolithic telescope. In astronomy, the spectrum of the sources in the scene are crucial to understanding the material composition of the sources. So, the ultimate goal is to have high-spatial-resolution imagery and obtain sufficient spectral resolution for all points in the scene. This goal can be accomplished through spatio-spectral interferometric imaging, which combines the aperture synthesis aspects of a Michelson stellar interferometer with the spectral capabilities of Fourier transform spectroscopy.

Spatio-spectral interferometric imaging can be extended to a wide-field imaging modality, which increases the collecting efficiency of the technique. This is the basis for NASA’s Wide-field Imaging Interferometry Testbed (WIIT). For such an interferometer, there are two light collecting apertures separated by a variable distance known as the baseline length. The optical path in one of the arms of the interferometer is variable, while the other path delay is fixed. The beams from both apertures are subsequently combined and imaged onto a detector. For a fixed baseline length, the result is many low-spatial-resolution images at a slew of optical path differences, and the process is repeated for many different baseline lengths and orientations. Image processing and synthesis techniques are required to reduce the large dataset into a single high-spatial-resolution hyperspectral image.

Our contributions to spatio-spectral interferometry include various aspects of theory, simulation, image synthesis, and processing of experimental data, with the end goal of better understanding the nature of the technique. We present the theory behind the measurement model for spatio-spectral interferometry, as well as the direct approach to image synthesis. We have developed a pipeline to preprocess experimental data to remove unwanted signatures in the data and register all image measurements to a single orientation, which leverages information about the optical system’s point spread function. In an experimental setup, such as WIIT, the reference frame for the path difference measured for each baseline is unknown and must be accounted for. To overcome this obstacle, we created a phase referencing technique that leverages point sources within the scene of known separation in order to recover unknown information regarding the measurements in a laboratory setting. We also provide a method that allows for the measurement of spatially and spectrally complicated scenes with WIIT by decomposing them prior to scene projection.

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Schatz, Lauren H., R. Phillip Scott, Ryan S. Bronson, Lucas R. W. Sanchez et Michael Hart. « Design of wide-field imaging shack Hartmann testbed ». SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622718.

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Standard adaptive optics systems measure the aberrations in the wavefronts of a beacon guide star caused by atmospheric turbulence, which limits the corrected field of view to the isoplanatic patch, the solid angle over which the optical aberration is roughly constant. For imaging systems that require a corrected field of view larger than the isoplanatic angle, a three-dimensional estimate of the aberration is required. We are developing a wide-field imaging Shack-Hartmann wavefront sensor (WFS) that will characterize turbulence over a large field of view tens of times the size of the isoplanatic angle. The technique will find application in horizontal and downward looking remote sensing scenarios where high resolution imaging through extended atmospheric turbulence is required. The laboratory prototype system consists of a scene generator, turbulence simulator, a Shack Hartman WFS arm, and an imaging arm. The system has a high intrinsic Strehl ratio, is telecentric, and diffraction limited. We present preliminary data and analysis from the system.

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Dunsby, Christopher William. « Wide-field coherence-gated imaging techniques including photorefractive holography ». Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407465.

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Bell, G. S. « HARP-B and wide-field imaging of molecular clouds ». Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596542.

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Part I of this thesis describe HARP-B – a new heterodyne array receiver operating at 345 GHz on the James Clerk Maxwell Telescope. The work described focuses on the optics, interferometer and commissioning of HARP-B. Careful testing and alignment of the optics was necessary to ensure that HARP-B would perform as required. Its Mach-Zehnder interferometer was put under computer control and characterised to allow it to be used as an effective sideband filter. This part concludes with the integration and commissioning of the receiver, leading up to first light. Part II then presents wide-field observations of the IC5146 and L977 molecular clouds, made with HARP-B and other instruments at the JCMT and IRAM 30 m telescopes. For IC5146, SCUBA continuum images and a dust extinction map were already available. These were complemented by spectral observations of C¹⁸O 1-0, C¹⁸O 2-1 and the 3-2 transition of ¹²CO, ¹³CO and C¹⁸O. The data were used to study the cloud structure, excitation conditions and dust properties. SCUBA continuum and C¹⁸O 2-1 observations were made of L977 and analysed along with the existing dust extinction map in order to study the dust and gas properties, and the structure of the molecular cloud.

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McGinty, James. « Development of wide-field fluorescence lifetime imaging for biomedical applications ». Thesis, Imperial College London, 2007. http://hdl.handle.net/10044/1/11826.

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Kim, Yang-Hyo. « Wide-field structured illumination microscopy for fluorescence and pump-probe imaging ». Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/121846.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references.
The optical resolution of microscopy is limited by the wave-like characteristic of the light. There are many recent advances in overcoming this diffraction limited resolution, but mostly focused on fluorescent imaging. Furthermore, there are few non-fluorescence wide-field super-resolution techniques that can fully utilize the applicable laser power to optimize imaging speed. Structured illumination microscopy is a super-resolution method that relies on patterned excitation. This thesis has presented novel applications of structured illumination microscopy to surface plasmon resonance fluorescence and pump-probe scattering imaging. First, structured illumination microscopy was introduced to surface plasmon resonance fluorescence imaging for high signal-to-noise and high resolution. Secondly, a theoretical framework for three-dimensional wide-field pump-probe structured illumination microscopy has been developed to increase the lateral resolution and enable depth sectioning. Further, structured illumination wide-field photothermal digital phase microscopy is proposed as a high throughput, high sensitivity super-resolution imaging tool to diagnose ovarian cancer. Finally, I have derived the exact analytical solution to the heat conduction problem in which a sphere absorbs temporally modulated laser beam for photothermal microscopy. The proposed method also has a great potential to be applied to other pump-probe modalities such as transient absorption and stimulated Raman scattering.
Funding sources and sponsors: National Institutes of Health (9P41EB015871-26A1, 5R01NS051320, 4R44EB012415, and 1R01HL121386-OlAl), National Science Foundation (CBET-09395 11), Hamamatsu Corporation, Singapore-Massachusetts Institute of Technology Alliance for Research and Technology (SMART) Center, BioSystems and Micromechanics (BioSyM), and Samsung Scholarship
by Yang-Hyo Kim.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Mechanical Engineering

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Brown, Graeme. « Time-resolved ultrafast spectroscopy of wide-gap II-VI semiconductor quantum wells ». Thesis, Heriot-Watt University, 2001. http://hdl.handle.net/10399/502.

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Foy, Christopher Ph D. (Christopher C. ). Massachusetts Institute of Technology. « Wide-field magnetic field imaging with nitrogen vacancy centers in nanodiamonds at high frame-rates ». Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/103750.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 83-88).
The nitrogen vacancy center (NV) is a promising single spin system in diamond with optical polarization, readout and optically detected magnetic resonances (ODMR). The NV has been shown to be a sensitive magnetometer at room temperature. In particular, owing to their small size, NV centers in nanocrystals (nanodiamonds) offer magnetic field imaging with high spatial resolution. Competitive magnetic field imaging methods such as magnetic force microscopy (MFM) or superconducting quantum interference devices (SQUID) either image serially, and are thus slow, or are limited in their use for biological systems. Nanodiamonds in contrast have the advantage that they can be attached to biological tissues in vivo and can be imaged in parallel at high speeds. Unfortunately, nanodiamonds tend to aggregate due to Coulomb interactions of their surface species. This aggregation results in a inhomogeneous broadening of the NV's ODMR with applied magnetic field. This broadening makes imaging magnetic fields non-trivial. In this work, we present a model to understand aggregated nanodiamonds. Despite NVs with defined crystallographic orientations demonstrating vectorial resolution of magnetic fields, this model predicts that aggregated nanodiamonds should be treated as absolute magnetometers. Further, a sparse sampling protocol is implemented that enables time resolved magnetometry and is used to image the magnetic field of a current carrying wire at greater than 33 Hz speeds with magnetic field sensitivities better than ... over a 10 [mu]m x 10 [mu]m field of view.
by Christopher Foy.
S.M.

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Philip, Liju. « Calibration and wide field imaging with PAPER : a catalogue of compact sources ». Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/2397.

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Observations of the redshifted 21 cm HI line promise to be a formidable tool for cosmology, allowing the investigation of the end of the so-called dark ages, when the first galaxies formed, and the subsequent Epoch of Reionization when the intergalactic medium transitioned from neutral to ionized. Such observations are plagued by foreground emission which is a few orders of magnitude brighter than the 21 cm line. In this thesis I analyzed data from the Donald C. Backer Precision Array for Probing the Epoch of Reionization (PAPER) in order to improve the characterization of the extragalactic foreground component. I derived a catalogue of unresolved radio sources down to a 5 Jy flux density limit at 150 MHz and derived their spectral index distribution using literature data at 408 MHz. I implemented advanced techniques to calibrate radio interferometric data that led to a few percent accuracy on the flux density scale of the derived catalogue. This work, therefore, represents a further step towards creating an accurate, global sky model that is crucial to improve calibration of Epoch of Reionization observations.

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Shikhar. « COMPRESSIVE IMAGING FOR DIFFERENCE IMAGE FORMATION AND WIDE-FIELD-OF-VIEW TARGET TRACKING ». Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/194741.

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Use of imaging systems for performing various situational awareness tasks in militaryand commercial settings has a long history. There is increasing recognition,however, that a much better job can be done by developing non-traditional opticalsystems that exploit the task-specific system aspects within the imager itself. Insome cases, a direct consequence of this approach can be real-time data compressionalong with increased measurement fidelity of the task-specific features. In others,compression can potentially allow us to perform high-level tasks such as direct trackingusing the compressed measurements without reconstructing the scene of interest.In this dissertation we present novel advancements in feature-specific (FS) imagersfor large field-of-view surveillence, and estimation of temporal object-scene changesutilizing the compressive imaging paradigm. We develop these two ideas in parallel.In the first case we show a feature-specific (FS) imager that optically multiplexesmultiple, encoded sub-fields of view onto a common focal plane. Sub-field encodingenables target tracking by creating a unique connection between target characteristicsin superposition space and the target's true position in real space. This isaccomplished without reconstructing a conventional image of the large field of view.System performance is evaluated in terms of two criteria: average decoding time andprobability of decoding error. We study these performance criteria as a functionof resolution in the encoding scheme and signal-to-noise ratio. We also includesimulation and experimental results demonstrating our novel tracking method. Inthe second case we present a FS imager for estimating temporal changes in the objectscene over time by quantifying these changes through a sequence of differenceimages. The difference images are estimated by taking compressive measurementsof the scene. Our goals are twofold. First, to design the optimal sensing matrixfor taking compressive measurements. In scenarios where such sensing matrices arenot tractable, we consider plausible candidate sensing matrices that either use theavailable a priori information or are non-adaptive. Second, we develop closed-form and iterative techniques for estimating the difference images. We present results to show the efficacy of these techniques and discuss the advantages of each.

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Livres sur le sujet "ULTRAFAST WIDE FIELD IMAGING"

MacGillivray, H. T., E. B. Thomson, B. M. Lasker, I. N. Reid, D. F. Malin, R. M. West et H. Lorenz, dir. Astronomy from Wide-Field Imaging. Dordrecht : Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1146-1.

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Kozak, Igor, et J. Fernando Arevalo, dir. Atlas of Wide-Field Retinal Angiography and Imaging. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17864-6.

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E, Kontizas, et IAU Commission 9, dir. Wide-field spectroscopy : Proceedings of the 2nd conference of the working group of IAU Commission 9 on "Wide-field imaging" held in Athens, Greece, May 20-25, 1996. Dordrecht : Kluwer, 1997.

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Field, Ryan Michael. High-Speed Wide-Field Time-Correlated Single-Photon Counting Fluorescence Lifetime Imaging Microscopy. [New York, N.Y.?] : [publisher not identified], 2014.

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Kontizas, E. Wide-Field Spectroscopy : Proceedings of the 2nd Conference of the Working Group of IAU Commission 9 on "Wide-Field Imaging" held in Athens, Greece, May 20.25, 1996. Dordrecht : Springer Netherlands, 1997.

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Symposium, International Astronomical Union. Astronomy from wide-field imaging : Proceedings of the 161st Symposium of the International Astronomical Union, held in Potsdam, Germany, August 23-27, 1993. Dordrecht : Kluwer Academic, 1994.

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United States. National Aeronautics and Space Administration., dir. "Wide field imaging of solar system objects with an 8192 x 8192 CCD mosaic" : Final technical report, March 1, 1993 to February 28, 1995. [Washington, D.C : National Aeronautics and Space Administration, 1995.

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Hall, Donald N. B. "Wide field imaging of solar system objects with an 8192 x 8192 CCD mosaic" : Final technical report, March 1, 1993 to February 28, 1995. [Washington, D.C : National Aeronautics and Space Administration, 1995.

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D, Cohen Ross, et United States. National Aeronautics and Space Administration., dir. A 21 centimeter absorber identified with a spiral galaxy : Hubble Space Telescope faint object spectrograph and wide-field camera observations of 3CR 196. [Washington, DC : National Aeronautics and Space Administration, 1996.

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ICONO '98 (1998 Moscow, Russia). ICONO '98 : Ultrafast phenomena and interaction of superstrong laser fields with matter--nonlinear optics and high-field physics : 29 June-3 July 1998, Moscow, Russia. Sous la direction de Fedorov M. V. 1940-, Scientific Council for Coherent and Nonlinear Optics (Rossiĭskai͡a akademii͡a nauk) et Russia (Federation). Ministerstvo nauki i tekhnologiĭ. Bellingham, Wash : SPIE--the International Society for Optical Engineering, 1999.

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Chapitres de livres sur le sujet "ULTRAFAST WIDE FIELD IMAGING"

Gundlach, Lars, et Piotr Piotrowiak. « Ultrafast Wide-Field Fluorescence Microscopy ». Dans Springer Series in Chemical Physics, 720–22. Berlin, Heidelberg : Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-95946-5_234.

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van der Tol, Sebastiaan. « Wide Field Imaging ». Dans Low Frequency Radio Astronomy and the LOFAR Observatory, 117–37. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-23434-2_8.

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Sanford, John. « Wide-Field Imaging ». Dans The Art and Science of CCD Astronomy, 93–100. London : Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0633-3_8.

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Heussen, Florian M., Carmen A. Puliafito et SriniVas R. Sadda. « Wide-Field Autofluorescence ». Dans Atlas of Wide-Field Retinal Angiography and Imaging, 49–57. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17864-6_4.

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Epchtein, N. « Infrared Wide-Field Surveys ». Dans Astronomy from Wide-Field Imaging, 13–16. Dordrecht : Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1146-1_2.

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Nicholson, Benjamin P., Karen R. Armbrust et H. Nida Sen. « Wide-Field Imaging in Uveitis ». Dans Multimodal Imaging in Uveitis, 37–49. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-23690-2_3.

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Friberg, Thomas, et Leanne Labriola. « Wide-Field Imaging and Angiography ». Dans Essentials in Ophthalmology, 27–40. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-85540-8_4.

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Hartley, M. « Photography in Wide-Field Astronomy ». Dans Astronomy from Wide-Field Imaging, 117–25. Dordrecht : Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1146-1_28.

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Chu, Thomas G., et David S. Boyer. « Wide-Field Fluorescein Angiography ». Dans Atlas of Wide-Field Retinal Angiography and Imaging, 27–36. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17864-6_2.

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Schyja, V., T. Lang et H. Helm. « Electron Imaging in Short-Pulse Strong Field Multiphoton Ionization ». Dans Ultrafast Processes in Spectroscopy, 311–13. Boston, MA : Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-5897-2_70.

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Actes de conférences sur le sujet "ULTRAFAST WIDE FIELD IMAGING"

Wake, D. R., H. W. Yoon, J. P. Preston, H. Morkoç et J. P. Wolfe. « Picosecond Imaging of Photoexcited-Carrier Transport in GaAs/AIGaAs Multiple Quantum Wells ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : Optica Publishing Group, 1990. http://dx.doi.org/10.1364/up.1990.thc12.

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Many investigators have made measurements of the mobility of carriers in the 2D system of GaAs/AIGaAs quantum wells (MQW). A variety of techniques have been utilized to measure actual transport through time-of-flight (TOF) rather than by response to electric fields. Among these have been time resolved measurements of photoinduced transient grating,1 luminescence,2 induced absorption/bleaching,3 and Raman scattering.4 We make use of the induced transparency at the heavy-hole exciton line in a 215 Å wide MBE grown multiple quantum well to detect the presence and dynamics of carriers from 5 ps to 5 ns after excitation. We have developed a picosecond absorption imaging TOF technique which reveals the time resolved spatial and spectral distribution of photoexcited carriers following a highly localized laser excitation.

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Stoltzfus, Caleb, Alexandr Mikhailov et Aleksander Rebane. « Optimizing ultrafast wide field-of-view illumination for high-throughput multi-photon imaging and screening of mutant fluorescent proteins ». Dans SPIE BiOS, sous la direction de Ammasi Periasamy, Peter T. C. So, Karsten König et Xiaoliang S. Xie. SPIE, 2017. http://dx.doi.org/10.1117/12.2250048.

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Svoboda, K., W. Denk, W. H. Knox et S. Tsuda. « Two-photon excitation scanning microscopy with a compact, mode locked, diode- pumped Cr:LiSAF Laser ». Dans International Conference on Ultrafast Phenomena. Washington, D.C. : Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.wb.2.

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Laser scanning microscopy combined with two-photon excitation of fluorescence holds great promise in imaging biological systems. This two-photon excitation laser scanning microscopy (TPLSM) [1] yields intrinsic submicron three-dimensional resolution with much reduced background fluorescence and thus reduced photodamage. Although the advantages of TPLSM as compared to wide field fluorescence microscopy and confocal microscopy have been demonstrated in a number of applications [2], the large cost and utility requirements of mode locked Ti:sapphire laser systems and other femtosecond light sources have kept TPLSM out of reach for most biology labs. We demonstrate here that a recently developed compact solid state laser that is mode locked with a Saturable Bragg Reflector (SBR) [3] is well-suited for TPLSM. A SBR-modelocked Cr:LiSAF laser was pumped with a 0.5 W, 670 nm diffraction-limited MOPA (SDL), providing 90 fs pulses at 860 nm with CW power of 25-44 mW per beam (Fig. la). A single beam was directed into a laser scanning microscope consisting of a pair of galvomirrors, a relay lens, a dichroic mirror, a Zeiss water-immersion objective (63 x 0.9 NA), and a photomultiplier tube for the detection of fluorescence photons [2]. Rat cortical brain slices (300 μm thick) were prepared using standard techniques. For anatomical imaging, neocortical pyramidal cells that were deeply embedded in the tissue were dialyzed and voltage clamped using whole-cell electrodes containing 500 μM fluorescein dextran (MW = 3 kD). TPLSM imaging at low magnification (Fig. 1B) revealed primary and secondary dendrites and the initial segment of the axon. At high magnification single dendritic spines, the smallest neuronal compartments, became apparent (Fig. 1C, arrow). A series of images acquired at different focal planes (Δz = 1.6 μm) demonstrates the sectioning capabilities of the microscope (Fig. 1D-F). For functional imaging of physiological calcium responses, neurons were dialyzed with electrodes containing the calcium indicator Ca-green-1 (300 μM, Molecular Probes). Ca-green is a fluorophore that undergoes a large fluorescence intensity change in response to Ca2+ binding. Intracellular free calcium concentration changes evoked by single action potentials could easily be detected (Fig. 1G).

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Prasankumar, R. P., Z. Ku, A. Gin, P. C. Upadhya, S. R. J. Brueck et A. J. Taylor. « Ultrafast Optical Wide Field Microscopy ». Dans Conference on Lasers and Electro-Optics. Washington, D.C. : OSA, 2009. http://dx.doi.org/10.1364/cleo.2009.cme2.

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Prasankumar, R. P., Z. Ku, A. Gin, P. C. Upadhya, S. R. J. Brueck et A. J. Taylor. « Ultrafast Optical Wide Field Microscopy ». Dans Nonlinear Optics : Materials, Fundamentals and Applications. Washington, D.C. : OSA, 2009. http://dx.doi.org/10.1364/nlo.2009.nfb5.

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Hunsche, S., M. Koch, I. Brener et M. C. Nuss. « Near-Field THz Imaging ». Dans Ultrafast Electronics and Optoelectronics. Washington, D.C. : OSA, 1997. http://dx.doi.org/10.1364/ueo.1997.uf6.

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Gao, Liang. « Ultrafast light field tomography ». Dans Ultrafast Nonlinear Imaging and Spectroscopy IX, sous la direction de Zhiwen Liu, Demetri Psaltis et Kebin Shi. SPIE, 2021. http://dx.doi.org/10.1117/12.2597257.

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Tordera Mora, Jorge, Xiaohua Feng et Liang Gao. « Ultrafast light field tomography ». Dans Biomedical Spectroscopy, Microscopy, and Imaging II, sous la direction de Jürgen Popp et Csilla Gergely. SPIE, 2022. http://dx.doi.org/10.1117/12.2621387.

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Gao, Liang. « Ultrafast light field tomography ». Dans High-Speed Biomedical Imaging and Spectroscopy VII, sous la direction de Keisuke Goda et Kevin K. Tsia. SPIE, 2022. http://dx.doi.org/10.1117/12.2613483.

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Du, D., X. Liu, J. Squier et G. Mourou. « Impact ionization in wide-band-gap materials under high-field ». Dans Ultrafast Electronics and Optoelectronics. Washington, D.C. : OSA, 1995. http://dx.doi.org/10.1364/ueo.1995.utue4.

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Rapports d'organisations sur le sujet "ULTRAFAST WIDE FIELD IMAGING"

Baltz, E. Microlensing Surveys of M31 in the Wide Field Imaging ERA. Office of Scientific and Technical Information (OSTI), octobre 2004. http://dx.doi.org/10.2172/839962.

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Finney, Greg A. Wide-field Imaging System and Rapid Direction of Optical Zoom (WOZ). Fort Belvoir, VA : Defense Technical Information Center, septembre 2010. http://dx.doi.org/10.21236/ada529354.

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Finney, Greg A. Wide-field Imaging System and Rapid Direction of Optical Zoom (WOZ). Fort Belvoir, VA : Defense Technical Information Center, décembre 2010. http://dx.doi.org/10.21236/ada534705.

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Finney, Greg A. Wide-Field Imaging System and Rapid Direction of Optical Zoom (WOZ). Fort Belvoir, VA : Defense Technical Information Center, mars 2011. http://dx.doi.org/10.21236/ada540304.

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