Conferences related to Optical collimators

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2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE


2020 IEEE 70th Electronic Components and Technology Conference (ECTC)

ECTC is the premier international conference sponsored by the IEEE Components, Packaging and Manufacturing Society. ECTC paper comprise a wide spectrum of topics, including 3D packaging, electronic components, materials, assembly, interconnections, device and system packaging, optoelectronics, reliability, and simulation.


2020 IEEE International Conference on Consumer Electronics (ICCE)

The International Conference on Consumer Electronics (ICCE) is soliciting technical papersfor oral and poster presentation at ICCE 2018. ICCE has a strong conference history coupledwith a tradition of attracting leading authors and delegates from around the world.Papers reporting new developments in all areas of consumer electronics are invited. Topics around the major theme will be the content ofspecial sessions and tutorials.


2020 IEEE International Conference on Plasma Science (ICOPS)

IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.


2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

All areas of ionizing radiation detection - detectors, signal processing, analysis of results, PET development, PET results, medical imaging using ionizing radiation


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Periodicals related to Optical collimators

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Advanced Packaging, IEEE Transactions on

The IEEE Transactions on Advanced Packaging has its focus on the modeling, design, and analysis of advanced electronic, photonic, sensors, and MEMS packaging.


Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Biomedical Circuits and Systems, IEEE Transactions on

The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Display Technology, Journal of

This publication covers the theory, design, fabrication, manufacturing and application of information displays and aspects of display technology that emphasize the progress in device engineering, device design, materials, electronics, physics and reliabilityaspects of displays and the application of displays.


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Most published Xplore authors for Optical collimators

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Xplore Articles related to Optical collimators

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Experimental study of the wavelength locked of the high power laser diode bar

2007 Conference on Lasers and Electro-Optics - Pacific Rim, 2007

An external cavity laser diode was built by using a high power laser diode bar (LDB, 10% duty cycle, 100 A current), collimated column Len for fast axis beam collimation and a volume Bragg grating (VBG) as a feedback element to get LDB's wavelength locked to the Bragg wavelength of the VBG.


Single-mode optical fiber coupling of high-power tapered gain region devices

IEEE Photonics Technology Letters, 1994

A simple method for collimating the optical output of a tapered gain region amplifier or laser and coupling to a single-mode optical fiber is described, along with a technique for quantitatively assessing the expected coupling efficiency. By using a tapered laser, 840 mW at 980 mm was coupled into single-mode fiber with 44% efficiency measured from fiber input to available ...


A micro optical wireless module for high-definition images and broadband wireless access

2006 Digest of Technical Papers International Conference on Consumer Electronics, 2006

We have developed a micro optical wireless module which provides broadband wireless access for information equipment at home or in the office, and also for mobile equipment. This module offers wireless access at more than 1.25 Gbps, over distances exceeding 10 m. Its micro size makes it possible to mount it on audio-visual equipment and mobile equipment.


Transmission imaging with axially overlapping cone-beams

IEEE Symposium Conference Record Nuclear Science 2004., 2004

We have shown that cone-beam transmission imaging of medium-energy photons that penetrate the parallel-hole collimators can be used to rapidly estimate attenuation maps for use in reconstruction of cardiac SPECT images. Such a transmission imaging geometry offers the advantages of eliminating the need to mechanically move the point-sources during imaging, and minimizes cross-talk between emission and transmission imaging. The axial ...


Testing and characterization of the DubaiSat-1 imaging system

2009 4th International Conference on Recent Advances in Space Technologies, 2009

An advanced imaging system was developed for the DubaiSat-1 satellite system, a high-resolution Earth imaging small satellite. The imaging system is designed to produce high-resolution image data of 2.5-m ground sample distance (GSD) in one panchromatic band and 5.0-m GSD in four multi-spectral bands with 20-km swath width. The result from the acceptance test and radiometric and geometric characterization of ...


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Educational Resources on Optical collimators

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IEEE.tv Videos

Multi-Level Optimization for Large Fan-In Optical Logic Circuits - Takumi Egawa - ICRC 2018
IMS 2011 Microapps - Ultra Low Phase Noise Measurement Technique Using Innovative Optical Delay Lines
An Energy-efficient Reconfigurable Nanophotonic Computing Architecture Design: Optical Lookup Table - IEEE Rebooting Computing 2017
On-chip Passive Photonic Reservoir Computing with Integrated Optical Readout - IEEE Rebooting Computing 2017
Multi-Level Optical Weights in Integrated Circuits - IEEE Rebooting Computing 2017
Spatial-Spectral Materials for High Performance Optical Processing - IEEE Rebooting Computing 2017
Demonstration of a Coherent Tunable Amplifier for All-Optical Ising Machines: IEEE Rebooting Computing 2017
Towards On-Chip Optical FFTs for Convolutional Neural Networks - IEEE Rebooting Computing 2017
An Integrated Optical Parallel Multiplier Exploiting Approximate Binary Logarithms - Jun Shiomi - ICRC 2018
Scalable and Reconfigurable Tap-Delay-Line for Multichannel Equalization - Ari Willner - Closing Ceremony, IPC 2018
An IEEE IPC Special Session with Kasia Balakier of UCL
Multiplication with Fourier Optics Simulating 16-bit Modular Multiplication - Abigail Timmel - ICRC 2018
Q&A with Bruce Kraemer: IEEE Rebooting Computing Podcast, Episode 24
IEEE Magnetics Distinguished Lecture - Mitsuteru Inoue
Optically Interconnected Extreme Scale Computing - Keren Bergman Plenary from the 2016 IEEE Photonics Conference
2013 IEEE Alexander Graham Bell Medal
An Optical Co-Processor for Large-Scale Machine Learning - Laurent Daudet at INC 2019
Robust Qubit Manipulation with Integrated Circuits: Optical Computing - Pérola Milman at INC 2019
IEEE IPC Special Session with Domanic Lavery of UCL
Phase Retrieval with Application to Optical Imaging

IEEE-USA E-Books

  • Experimental study of the wavelength locked of the high power laser diode bar

    An external cavity laser diode was built by using a high power laser diode bar (LDB, 10% duty cycle, 100 A current), collimated column Len for fast axis beam collimation and a volume Bragg grating (VBG) as a feedback element to get LDB's wavelength locked to the Bragg wavelength of the VBG.

  • Single-mode optical fiber coupling of high-power tapered gain region devices

    A simple method for collimating the optical output of a tapered gain region amplifier or laser and coupling to a single-mode optical fiber is described, along with a technique for quantitatively assessing the expected coupling efficiency. By using a tapered laser, 840 mW at 980 mm was coupled into single-mode fiber with 44% efficiency measured from fiber input to available internal fiber power, in excellent agreement with the 48% predicted. When transmission losses of the collimating optics are included, the power coupling efficiency referred to the laser facet power is 32%.<<ETX>>

  • A micro optical wireless module for high-definition images and broadband wireless access

    We have developed a micro optical wireless module which provides broadband wireless access for information equipment at home or in the office, and also for mobile equipment. This module offers wireless access at more than 1.25 Gbps, over distances exceeding 10 m. Its micro size makes it possible to mount it on audio-visual equipment and mobile equipment.

  • Transmission imaging with axially overlapping cone-beams

    We have shown that cone-beam transmission imaging of medium-energy photons that penetrate the parallel-hole collimators can be used to rapidly estimate attenuation maps for use in reconstruction of cardiac SPECT images. Such a transmission imaging geometry offers the advantages of eliminating the need to mechanically move the point-sources during imaging, and minimizes cross-talk between emission and transmission imaging. The axial extent over which artifact-free attenuation maps can be reconstructed is limited by the cone- beam geometry and source collimation. We investigated irradiation of a single head by multiple point-sources such that their asymmetric cone-beam fields overlap in the axial direction as a method of extending the axial coverage of the patient. This study reports on testing of a penalized-likelihood algorithm for transmission reconstruction of overlapping cone-beams. This algorithm was evaluated through MCAT simulations and applied to transmission measurements of an anthropomorphic phantom. The experimental work consisted of performing a series of flood and transmission measurements on the anthropomorphic phantom with shifted axial locations of point-sources. We summed the projection data from individual measurements to simulate the projection data for a multiple point-source system. With the proposed penalized-Iikelihood algorithm, the full axial extent (20.5 cm) of the anthropomorphic phantom was reconstructed for the overlapping cone-beam geometry with 2 point-sources per camera head.

  • Testing and characterization of the DubaiSat-1 imaging system

    An advanced imaging system was developed for the DubaiSat-1 satellite system, a high-resolution Earth imaging small satellite. The imaging system is designed to produce high-resolution image data of 2.5-m ground sample distance (GSD) in one panchromatic band and 5.0-m GSD in four multi-spectral bands with 20-km swath width. The result from the acceptance test and radiometric and geometric characterization of its flight model is presented and reviewed in this paper together with methodology. Its upgraded version under development is also introduced with its key features and the development status.

  • Multiscale wavelet filter for high resolution radioisotopic images

    Radioisotopic Investigations are very useful for functional diagnosis, but available gamma cameras have poor spatial resolution. Development of new PSPMT based high-resolution detectors brings new interests to this medical imaging technique. However, the Poissonian nature of emitted photon flux and low count images due to low doses administered to the patients and to collimation, lead to images with granular aspect. This noisy appearance is particularly inconvenient when looking for cold nodules as in thyroid examinations. Low- pass filters, which reduce noise, are not well suited for detecting small cold nodules. An adapted translation invariant wavelet filter is designed which takes into account the poissonian feature of noise and preserves small sized structures. The filter was tested by Monte Carlo simulations, phantom and clinical thyroid scintigraphies. Cold spherical nodules as small as 4 mm in diameter are easily detected on filtered images acquired with IRIS (ARIES) high-resolution gamma ray imaging probe. Presentation of filtered images at different scales offering enhanced visual quality and lowered noise, simultaneously with original image, allows more comfortable analysis and improves scintigraphic diagnosis ability.

  • Reconstruction of Electronically Collimated Images Obtained from Single Photon Emitters Using a Spherical System of Coordinates

    An algorithm has been developed to mathematically map planar scintillation camera images onto a spherical surface and subsequently reconstruct images also on a spherical surface. This technique results in an increase in the computational efficiency of iterative reconstruction techniques used to reconstruct electronically collimated images of single photon emitters. Results are presented using a prototype electronically collimated gamma camera under development in our laboratory.

  • Tile/fiber results for the upgraded plug hadron calorimeter

    We summarize the R&D results for the Upgraded Plug Hadron Calorimeter using Tile/Fiber technology. The transverse uniformity of the response of the tiles as a function of fiber groove depth and the position of the fiber within the groove is discussed. We compare the light yield and transverse uniformity of the response of megatiles vs individual tiles. We also present the results of a study of the light yield of tiles as a function of their size.

  • The limit of radar range resolution for a distributed target

    None

  • An intense auroral z-pinch recorded in antiquity on southwestern artifacts

    Summary form only given. A direct correlation of several tens of morphologies of Z-pinch instabilities to archaic petroglyphs, thought to date to 5000-4000 BCE, has been made. The accuracy of the petroglyphs in depicting MHD instabilities suggests the influx to Earth of intense plasma visible as highly collimated synchrotron light from sub-gigaampere currents. Here we analyze an ancient Mixtec ceremonial shield or chimalli from a cave in Acatlan, Mexico, in terms of intense auroral sheath structure. The chimalli is a 30 cm wooden shield of concentric circles and inner pattern. The outer centric contains 28 holes adjacent to a ring of 56 pairs (112) of polished turquoise stones. For comparison, some hundreds of petroglyphs found on all continents having 56 outer dots or rays and concentric circles provide a universal comparison template. Thin multi-megaampere plasma sheaths show 56 current filaments, depicting 56 adjacent pairs. Fast 3D PIC simulations of the interacting currents show a rapidly evolving complex center subject to cultural interpretation, the most creative found between 15 and 25 deg, north, i.e., Mesoamerica and India



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