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检索条件"任意字段=Conference on Current Developments in Optical Design and Engineering V"

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Optimization of the profile and material of wire contacts for an IR photodetector 8

Optimization of the profile and material of wire contacts fo...

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8th International School and conference "Saint Petersburg OPEN 2021" on Optoelectronics, Photonics, engineering and Nanostructures, SPbOPEN 2021

作者： Kamarchuk, A.v. Bauman, D.A. Marchenko, A.I. Saint-Petersburg National Research University of Information Technologies Mechanics and Optics Saint-Petersburg197101 Russia

The study is devoted to the influence of the choice of geometry and materials of wire contacts on the reflection coefficient and thermal characteristics of the photodetector and the quality of the device design. The process of diffusion of materials of wire contacts and contact pads on a photodetector crystal is investigated. The studies were carried out on samples that are rather small in size (250x250x400 um). During the experiment, 4 main types of loop geometry were selected (main loop, reverse loop, double reverse loop, long loop). The loops were formed using a gold wire 25 µm in diameter. The quality of microwelds was investigated in 3 ways: shear and pull-off tests, optical observation using a scanning electron microscope (SEM), and contact resistance measurement. The aim of the work is to create a high-quality design of an IR photodetector, which allows achieving a high sensitivity (at least 0.5 A / W), a large dynamic range (at least 40 dB) and low indicators of dark current values. The developed technology ensures high quality of the photodetector design. Due to the low costs of this technological process (wire material, the number of operations required for installation), relative to other technologies, which allows maintaining high performance in the technical component of the photodetector, the installation method may be of practical interest in production. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Wire

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optically Multiplexed Neutron Time-of-Flight Technique for ion Temperature Imaging in Inertial Confinement Fusion

Optically Multiplexed Neutron Time-of-Flight Technique for i...

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IEEE International conference on Plasma Science (ICOPS)

作者： L. Tafoya C. Danly C. Wilde v. Geppert-Kleinrath R. McBride Los Alamos National Laboratory P-1: Dynamic Imaging and Radiography Los Alamos New Mexico United States of America Nuclear Engineering and Radiological Sciences University of Michigan Ann Arbor Michigan United States of America

Modern experiments in laser-driven inertial confinement fusion (ICF) are susceptible to contamination of the central hotspot by high-Z material during compression that impedes thermonuclear burn. Hotspot mix can be quantified using the ion temperature distribution of the implosion given the predicted deviation between the plasma and contaminant1. but current neutron time-of-flight (nToF) diagnostics can only measure the spatially integrated temperature. This project probes the feasibility of using time multiplexed optical fibers to record nToF spectra from segmented thin scintillators, which could be used to collect a spatially resolved temperature measurement on a single photomultiplier tube (PMT). A prototype detector was constructed in which 20 optical fibers of increasing length were coupled to an EJ-262 plastic scintillator at one end and a Photek PMT210 at the other. The detector was tested on the OMEGA laser and an nToF pulse was successfully measured through all 20 channels at the expected time separations, though direct interactions of fusion products with the PMT interfered with the first 5 channels. design methodology, material selection, experimental results, and preliminary data analysis are discussed. Next steps will be aimed at applying this technique to previous work demonstrating a 1D spatially resolved ion temperature imager on OMEGA 2 ,3 to evaluate the feasibility of 2D ion temperature imaging at NIF with a cost-efficient detector.

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Investigation of a Solar Concentrator for Water Distillation 1

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International conference on Thermal engineering and Management Advances, ICTEMA 2020

作者： Mahavar, Sunita Goyal, Ankit Balakin, Boris v. Department of Physics University of Rajasthan Jaipur India Western Norway University of Applied Sciences Bergen Norway NRNU Moscow Engineering Physics Institute Moscow Russia

ISBN: (数字)9789811623479

ISBN: (纸本)9789811623462

The non-availability of freshwater is one of the major problems faced by humanity. Major developments in water purification technologies are needed in the current scenario at an affordable price. Different types of treatment processes are available to supply freshwater to rural and urban areas at large and small scales. However, conventional fossil-fuel-powered desalination techniques consume extensive amounts of resources and can have damaging impact on the environment. Abundant, cheap and clean renewable energy sources are a promising alternative for powering modern desalination processes. The present paper focuses on an experimental study of a dish-type solar concentrator for water distillation. Different types of receivers (pressurized/non-pressurized and transparent/opaque) are tested, and analysis is made for the optimization of receiver design and to obtain maximum yield. Tests are also performed with transparent receiver in order to execute further tests with activated charcoal (AC), graphene and metal nanoparticle-dispersed water. In water quality test, TDS and pH values are measured before and after the experiments. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Activated charcoal Concentrated solar desalinator Concentration ratio Pressurized receivers

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Autonomous vehicles: Steering the Future of Transportation with Self-Driving Technology and Advanced AI Systems

Autonomous Vehicles: Steering the Future of Transportation w...

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Global conference for Advancement in Technology (GCAT)

作者： Daniel Nareshkumar. M Desidi Narsimha Reddy A. Sowmiya v. Samuthira Pandi Rayala Sateesh N. Hindumathy Department of Electronics and Communication Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences SIMATS University Chennai Tamil Nadu India Data Consultant (Data Governance Data Analytics: Enterprise Performance Management AI&ML) Soniks Consulting LLC Texas USA Department of EEE Rajalakshmi Engineering College Chennai Centre for Advanced Wireless Integrated Technology Chennai Institute of Technology Chennai Tamil Nadu India Department of ECE MLR Institute of Technology Hyderabad Department of Artificial Intelligence and Machine Learning Vel Tech Rangarajan Dr.Sagunthala R & D Institute of Science and Technology Chennai

ISBN: (数字)9798350376685

ISBN: (纸本)9798350376692

Autonomous vehicles (Avs) are a game-changer in the transportation industry; they will alter cityscapes, cut down on accidents, and reimagine how people experience mobility. This study investigates the complex relationship between autonomous vehicles and high-tech AI systems, looking at how these two technologies can influence transportation in the future. The paper highlights crucial developments in sensor fusion, machine learning algorithms, and real-time data processing that are essential for the development of fully autonomous systems by analyzing the present status of Av technology. In the first part of the study, the basic technologies that support Avs are described. These technologies include LiDAR, radar, cameras, and GPS. When taken together, they allow Avs to perceive their surroundings and locate themselves. After that, it delves into how AI is helping Avs understand sensor data, make judgments in real-time, and carry out complicated maneuvers, showcasing how advancements in deep learning, neural networks, and predictive analytics are powering these capabilities. Integrating Avs into current transportation infrastructures presents both potential and obstacles, which the paper delves into. Critical situation safety, legal frameworks, cybersecurity risks, and AI decision-making ethics are all covered. In addition to the environmental advantages of improved traffic flow and decreased emissions, the study delves into the possible socioeconomic implications, including shifts in urban design, public transit, and the labor market. The research delves into the existing deployment tactics and the path for scaling Av operations through a thorough analysis of case studies, pilot projects, and industry reports. It determines how prepared different groups are to accept this revolutionary technology, including the general public, lawmakers, and manufacturers. To sum up, the study highlights how important it is for academic institutions, business executives, and governm

关键词： Ethics Machine learning algorithms Urban planning Decision making Sensor fusion Data processing Real-time systems Safety Computer security Autonomous vehicles

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Inverse designed flat optics with multilevel diffractive lenses 11

Inverse designed flat optics with multilevel diffractive len...

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conference on current developments in Lens design and optical engineering XXI

作者： Banerji, Sourangsu Meem, Monjurul Majumder, Apratim Garcia, Juan C. Hon, Philip Pies, Christian Oberbiermann, Timo Menon, Rajesh Rodriguez, Berardi Sensale Univ Utah Elect & Comp Engn Salt Lake City UT 84102 USA Northrop Grumman Corp NG Next Redondo Beach CA 90278 USA Heidelberg Instruments Mikrotech Heidelberg Germany Oblate Opt Inc San Diego CA 92130 USA

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

In conventional imaging, the information transfer from the object to the image plane is accomplished either with the help of a traditional lens that performs a one-to-one mapping or an unconventional lens that performs a one-to-many mapping. In the first case, the image is formed directly, whereas in the second case, the image is formed after a computation. The conventional lens approach is preferred in most cases due to the high signal-to-noise ratio achievable at each image pixel. By appealing to the fact that for most of the imaging applications, it is only the intensity, which is measured by the detector, the phase of the field in the image or focal plane is a free parameter, something that comes from the inverse diffraction transform. Therefore, it is easy to visualize that this phase of the plane wave after it transmits the lens can have multiple forms. Hence, the final choice can be made based upon specific application tailored requirements like achromaticity, depth-of-focus, wide-angle imaging, etc. This concept was exploited to design an achromatic MDL via inverse design across almost the entire electromagnetic spectrum (lambda = 450 nm to 15 mu m). Furthermore, a MDL with a Field Of view (FOv) up to 50 degrees for wide-angle imaging as well as a MDL to enable an extreme Depth of Focus (EDOF) imaging of up to 6 m in the NIR were also designed.

关键词： Inverse design Diffractive lens Imaging

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Structure and Mixed Signal Front-End of White Organic Light Source for MEMS Sensor

Structure and Mixed Signal Front-End of White Organic Light ...

引用

International conference on Perspective Technologies and Methods in MEMS design (MEMSTECH)

作者： Nazar Barylo Oksana Boyko Roman Holyaka Pavlo Stakhira Stepan Kutsiy Iryna Yaremchuk Department of Electronic Engineering Lviv Polytechnic National University Lviv Ukraine Medical Informatics Department Danylo Halytsky Lviv National Medical University Lviv Ukraine Department of Electronics and Information Technology Lviv Polytechnic National University Lviv Ukraine

ISBN: (纸本)9798350396812

The work is devoted to the problem of developing the structure of an organic light-emitting diode (OLED) and mixed signal front-end with extended functionality, specifically, in-situ measurement of the current-voltage (I-v) characteristics of the structure directly during their operation. The OLED structure uses long-term thermally activated delayed fluorescence (TADF) of the TPAPm organic film. The measurement of I-v characteristics of OLED structures is carried out on the transient processes of voltage formation in the step-up circuits of the drivers. The OLED front-end is implemented on a programmable system on a PSoC chip of the 5LP Family Cypress Semiconductor Corporation. The results of the work are used for optical MEMS sensors using organic light sources.

关键词： Temperature measurement Micromechanical devices Temperature sensors Semiconductor device measurement voltage measurement Organic light emitting diodes Sensor phenomena and characterization

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Immersive college English teaching design based on big data 2

Immersive college English teaching design based on big data

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2nd International conference on Cloud Computing and Mechatronic engineering, I3CME 2022

作者： Liu, Jie School of Foreign Languages Wuhan Business University Hubei Province Wuhan430056 China

ISBN: (纸本)9781510657502

In hodiernal international world, immersive college(CE) teaching based on big data is an essential teaching activity. This teaching mode caters to the trend of globalization, and also greatly improves students' learning acceptance ability. This article studies the immersion based on big data design features of CE teaching mode, combing the concept of big data, immersion teaching means, teaching mode analysis of the characteristics of a typical, and so on, by in large data model, to discuss the design pattern of English teaching effect, and the questionnaire survey results. Based on big data technology, combined with hodiernal current CE teaching mode, based on the existing models on the armed big data tools, make truly rich immersive CE teaching mode characteristic of modern society, like a spark set the prairie ablaze the society as a whole class, let the modern college students immersed in modern CE teaching mode, maximum draw utility. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Big data

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Analysis and design of STI-bounded Single Photon Avalanche Diode with Low Breakdown voltage 1

Analysis and Design of STI-bounded Single Photon Avalanche D...

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1st International conference on Electronic Information Technology and Smart Agriculture, ICEITSA 2021

作者： Hao, Jianxiu Ding, Jianqun Deng, Yungui Mi, Xianwu Wang, Qingxia Li, Zhengfeng School of Electrical and Information Engineering Huaihua University Key Lab. of Intelligent Contr. Technol. for Wuling-Mountain Ecological Agriculture in Hunan Province Huaihua China The Academic Affairs Office Huaihua University Huaihua China The Center for Practical Teaching Huaihua University Huaihua China

ISBN: (纸本)9781665413008

Single photon avalanche diodes (SPADs) which are based on impact ionization effect have been widely applied to detect the ultra-weak optical signals. Conventional SPAD devices have a high breakdown voltage due to the undeveloped manufacturing processes, which causes a high power dissipation. This paper proposes a structure of single photon avalanche diode with shallow trench isolation (STI) based on MXIC 0.18 μm complementary metal oxide semiconductor (CMOS) process. A series of simulations performed by Silvaco-Technology Computer Aided design (TCAD) were done to verify the fundamental working principle about SPAD. The two-dimensional simulation results include the volt-ampere characteristics, darkcurrent, electric field distribution, current path, impact ionization distribution and spectral response curve of the SPAD device. And the simulation results demonstrate that the proposed structure has a low breakdown voltage (11.5 v). The response peak wavelength is 500 nm, which can be applied to detecting the visible light. © 2021 IEEE.

关键词： Impact ionization

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Miniaturised photonic front-end for the next generation of space SAR applications

Miniaturised photonic front-end for the next generation of s...

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2020 International conference on Space Optics, ICSO 2020

作者： Mengual, T. Duarte, vanessa C. Polo, v. Piqueras, M.A. Sanchis, P. Brimont, A. Zurita, D. Chmielak, B. Suckow, S. Giesecke, A. Matarazzo, E. DiPalma, L. Maiarelli, D. Wang, H. Huggard, P.G. DAS Photonics Camino de Vera s/n Edificio 8F Valencia46022 Spain Nanophotonics Technology Center UPV Camino de Vera s/n Valencia46022 Spain AMO GmbH Otto-Blumenthal-Str. 25 Aachen52074 Germany AIRBUS Italia S.p.A. Via dei Luxardo 22- Rome24 - 00156 Italy RAL Space STFC Rutherford Appleton Laboratory Ox11 0QX Didcot United Kingdom

There is a natural trade-off between spacecraft size and functionality in all current satellite applications, independently of orbit and mission. Therefore, advances in both miniaturization and integration technologies are required to increase satellites' lifetime and performance, simultaneously reducing their cost. In case of the next generation of Earth Observation satellites, one of the key development areas is synthetic aperture radar (SAR) antennas, where expected progress will be to increase the operating bandwidth - requiring, for instance wideband true-time delay (TTD) beamformers - and miniaturization, drastically reducing the mass and volume compared to current implementations. In this scenario, the use of photonic integrated circuits (PIC) technology in the beamforming network, in combination with an optical fibre harness, are obvious key enabling technologies for future SAR instruments. optically implemented TTD beamforming structures achieve orders-of-magnitude improvements in size and mass compared with coaxial cable and RF switch based alternatives. Photonic technology also brings easy routing thanks to wavelength-division multiplexing, antenna and RF system integration due to the EMI-free characteristic of the optical fibre and a reduction of the risks associated with the in-orbit antenna deployment. Additionally, the inherent broadband characteristic of photonic technology, related to the transport and processing of RF signals, simplifies the beamforming network and signal distribution design for different frequencies, applications and missions. In the H2020 RETINA project (H2020-SPACE-2018-821943) a consortium formed by DAS Photonics, Airbus Italia, AMO GmbH, STFC Rutherford Appleton Laboratory and Universitat Politècnica de valència is developing a miniaturised photonic front-end for next-generation X-band space SAR applications. In this article we present advances in design and fabrication of PIC for TTD, the design and predicted performance of m

关键词： Synthetic aperture radar

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Smart design and Implementation of Self Adjusting Robot using Arduino

Smart Design and Implementation of Self Adjusting Robot usin...

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Augmented Intelligence and Sustainable Systems (ICAISS), International conference on

作者： R.G. vidhya Kamlesh Singh P John Paul T. Aditya Sai Srinivas Jyoti Prasad Patra K.v.Daya Sagar Department of Electronics and Communication Engineering HKBK College of Engineering Bangalore India Department of Computer Science Engineering Graphic EraHill University Dehradun Campus Dehradun India Department of Computer Science and Engineering Ellenki College of Engineering and Technology Hyderabad India Department of Computer Science and Engineering G Pulla Reddy College of Engineering Kurnool Andhra Pradesh India Faculty of Electrical OUTR Mahalaxmi ViharGhatikia Techno campus Odisha University of Technology and Research Bhubaneswar Odisha India Department of ECE Koneru Lakshmaiah Education Foundation Vaddeswaram Guntur Andhrapradesh India

ISBN: (纸本)9781665489638

Self-adjusting robots are an excellent approach for keeping up with breakthroughs and developments in advanced mechanics. This idea is based on the basic pendulum theory. A framework goes through a cycle of self-adjustment to reinforce itself from inside. This study intends to overcome the difficulties of stabilizing an unstable structure by supplying the robot with the essential components for self-adjustment and balance. Data from the accelerometer and gyrator are used to compute the robot's accurate three-dimensional location, which is then relayed to a controller. The regulator then uses its own code to legally direct the wheel rotation of the drive module, boosting the robot's stability. This robot has an advantage over others with four wheels since it can spin faster and around obstacles more readily. As a result, it is a necessary tool in many current scenarios.

关键词： Regulators Codes Software packages Wheels Gyrators Computer architecture Robot sensing systems

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