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检索条件"任意字段=Conference on Design and Engineering of Optical Systems II"

共 20635 条记录，以下是81-90 订阅

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Enhanced optical design: Optimizing MTF Through Overlapping Aperture MLA Configuration

Enhanced Optical Design: Optimizing MTF Through Overlapping ...

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2024 International conference on Intelligent Algorithms for Computational Intelligence systems, IACIS 2024

作者： Kumar Gowda B N, Vijay Gauni, Sabitha Bhanupriya, P. Sreenivasulu, K.N. Anandaraju, M.B. Maik, Vivek Adichunchanagiri University Bgs Institute of Technology Department of Electronics and Communication Engineering Mandya India Srm Institute of Science and Technology Department of Electronics and Communication Engineering Chennai India Saveetha Engineering College Department of Electronics and Communication Engineering Kancheepuram India Nagarjuna College of Engineering and Technology Vtu Department of Electronics and Communication Engineering Bangalore India Indian Institute of Technology Madras Department of Electrical Engineering Chennai India

ISBN: (纸本)9798350360660

This study introduces a novel microlens array (MLA) design incorporating overlapping apertures to enhance flexibility in MLA structure requirements, utilizing chief ray tracing and paraxial imaging optics in projection imaging analysis. The design achieves consistent illumination across the field of vision (FOV) and maintains a compact form factor. Comparative analysis between a sample 3x3 MLA projector and the proposed 3x3 MLA projector, both with equal aperture sizes, demonstrates the effectiveness of the overlapping apertures. Simulations show significant improvements in FOV and modulation transfer function (MTF), as validated by diffraction MTF analysis. The two-layer overlapping structure has modulation depths larger than 0.6, 0.5, and 0.3 for 2o, 5o, and 7o Semi-FOVs. This research contributes to the development of more sophisticated and efficient small MLA projection optical systems, offering advancements in uniform lighting, increased FOV, and improved MTF. © 2024 IEEE.

关键词： Ray tracing

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Welcome to the Fifth International Workshop on Requirements engineering for Well-Being, Aging, and Health 32

Welcome to the Fifth International Workshop on Requirements ...

引用

32nd IEEE International Requirements engineering conference (RE)

作者： Bjarnason, Elizabeth Lessard, Lysanne Levy, Meira Liu, Lin Lund Univ Software Engn Res Grp Lund Sweden Univ Ottawa Telfer Sch Management Ottawa ON Canada Shenkar Coll Engn & Design Ramat Gan Israel Tsinghua Univ Sch Software Beijing Peoples R China

ISBN: (纸本)9798350395525;9798350395518

Welcome to the fifth edition of the REWBAH workshop, a satellite event of the IEEE International Requirements engineering conference (RE). The REWBAH workshop fosters discussion related to requirements engineering resulting from the need to build software systems that not only support healthcare, but also promote well-being, encourage patients and the population in general to live according to healthy lifestyle recommendations, and address the specific needs of an aging population. This multidisciplinary workshop brings together practitioners and researchers from relevant disciplines. Among other objectives, REWBAH aims to i) develop RE approaches that support multiple perspectives of well-being, aging, and health;ii) develop methods for defining and monitoring requirements of systems and services that promote well-being or health;and iii) identify open research and industry challenges, as well as validation objectives for proposed solutions.

关键词： Requirements Well-being Aging Health

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Simulation of the impact of propagation through optical fluids and turbulent flow on optical system performance 9

Simulation of the impact of propagation through optical flui...

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conference on optical design and engineering IX

作者： Normanshire, Chris La Cava, Steve Miller, Craig Schwarz, Walter Mercado, Felipe Carbajal, Esteban Vega, David Lopes, Joao Mendes Kamel, Mohammed Viti, Valerio Herringer, Nick Elliott, Erin ANSYS Inc 2600 Ansys Dr Canonsburg PA 15317 USA

ISBN: (纸本)9781510673571;9781510673564

Performance and reliability requirements for modern optical systems dictate that they can no longer be simulated in isolation without reference to external and environmental factors which can adversely impact image quality. Simultaneously, advances in multi-physics simulation techniques have made it possible to couple the impacts of, for example, thermal changes and structural stresses to optical analysis to better predict performance in operational conditions. Applications where light propagates through a fluid surrounding or within an optical system present a particular simulation challenge in this regard, and one that requires new simulation techniques. In the near-field, variations in pressure, temperature, and density of the fluid give rise to corresponding variations in refractive index that will, in turn, induce optical aberrations in a transmitted wavefront. These aberrations can lead to degraded image quality and line-of-sight errors. Accurate and robust analysis of such effects necessitates the coupling of computational fluid dynamics (CFD), for simulation of turbulent flow, shock waves, etc. with ray tracing to compute key optical metrics. Furthermore, this analysis can be combined with far-field atmospheric effects, including emissivity, absorption, scattering, refraction, to build a comprehensive picture of system performance. The ability to perform multi-physics simulations early in the design process provides the opportunity to develop strategies to identify and mitigate negative performance drivers. We present a solution to model the effects of light propagation through optical fluids accurately and combine this with analysis of structural and thermal effects. This solution will be demonstrated in use cases including electro-optic infrared airborne systems.

关键词： Atmospheric effects turbulent flow shock wave laser communication electro-optic infrared aero optics optical fluid

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design method of electronic devices based on digital twin 10

Design method of electronic devices based on digital twin

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10th International conference on Mechanical engineering, Materials, and Automation Technology, MMEAT 2024

作者： Jiang, Yunan Jiangsu Automation Research Institute Lianyungang Jiangsu222000 China

ISBN: (纸本)9781510682634

Taking the development of public computing service systems as the background requirement, combined with Digital Twin related technologies, the design of computing units is carried out. Research is carried out from the aspects of structural design, thermal simulation, mechanical simulation, and life cycle prediction, breaking through key technologies such as product health management technology based on Digital Twin ideas, thermal simulation, and twin technology based on model analysis, and mechanical simulation and twin technology based on finite element method. A full life cycle information mirror of computing units in public computing service systems is constructed to improve the reliability, maintainability, guarantee, and testability of computing units, laying a foundation for subsequent in-depth research. © 2024 SPIE.

关键词： design Vibration Finite element methods Computing systems Electronic components Computer simulations Modal analysis Reliability

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design and Characterization of Metasurfaces for LiDAR Applications 9

Design and Characterization of Metasurfaces for LiDAR Applic...

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conference on optical design and engineering IX

作者： Loucif, Amir Chalony, Maryvonne Majorel, Clement Kuperman, Quentin Genevet, Patrice CRHEA Valbonne France SYNOPSYS SEV 1128 Route Toulon F-83400 Hyeres France Colorado Sch Mines Phys Dept Coorstek 1523 Illinois St Golden CO 80401 USA

ISBN: (纸本)9781510673571;9781510673564

Metasurfaces is an emerging technology, poised to disrupt diverse application sectors of the optical industry, including AR/VR, Light imaging and Ranging (LiDAR) and optical design. With respect to conventional diffractive optical elements (DOE), Metasurfaces provide considerably higher scalability, larger field of view (FoV) and enhanced diffraction efficiencies (DE). In addition, their design flexibility allows for arbitrary intensity, phase and polarization far-field distribution. Most of the commercial imaging LiDAR devices rely on light scanning architectures that enforce compromising between FoV and frame rate. Splitting incident power to project a point-cloud of intensity distribution in the far-field, flash LiDAR systems can improve imaging speed, but at the expense of the imaging depth. To overcome these limitations, metasurfaces have been proposed as a good alternative to conventional LiDAR components, for both detection and illumination. However, further efforts in improving design, fabrication and characterization of those functionalized surfaces are still needed. Here, we demonstrate the advantage of design flow based on inverse design capability for the generation of a metasurface targeting advanced beam steering and arbitrary point-cloud illumination for 3D sensing. The development of metasurface-based projectors, able to generate arbitrary light distributions -beyond classical diffraction patterns- would open new LiDAR imaging capabilities with improved resolution and performances.

关键词： LiDAR point-cloud metasurface design characterization

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Development of a TRIZ-Based design Methodology for Digital Transformation 24th

Development of a TRIZ-Based Design Methodology for Digital T...

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24th International TRIZ Future conference

作者： Otsuka, Yuki Hasegawa, Hiroshi Shibaura Inst Technol 307 FukasakuMinuma Ku Saitama Japan

ISBN: (纸本)9783031759253;9783031759239;9783031759222

Since 2010s at business, digital transformation (DX) initiatives and digitalizing businesses have increased. The design of digital information systems is influenced by business and technological aspects and can have a considerable impact on the attractiveness of services. However, research on design science for DX or digitalizing business remains inadequate and not established. Meanwhile, the effectiveness of many methods established in the engineering field, including TRIZ that supports design and conceptual design, has been tested. The authors proposed "Creative and inventive design Support System (CDSS)" in 2009 to support conceptual design in the engineering field based on TRIZ and suggested new methods "CDSSforDX" for applications in digital business and digital transformation (DX) in 2023. CDSSforDX is based on CDSS and has two additional processes, "strategic response" and "digital business strategy and DX strategy process," as the strategy. In this paper, we present CDSSforDX methods and show the evaluation results and examples of using this methodology.

关键词： Problem solving Digital transformation Digital business Conceptual design Storytelling

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Application of Model-based systems engineering in the design of Civil Aircraft Provide Guidance System Architecture 3

Application of Model-based Systems Engineering in the Design...

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3rd International conference on Testing Technology and Automation engineering, TTAE 2023

作者： Fan, Lili Wang, Jian Chen, Zhiyu Aircraft Development Department Shanghai Aircraft Design and Research Institute Shanghai201210 China

ISBN: (纸本)9781510674769

With the development complexity of civil aircraft, the development cycle and cost are also increasing. Model-Based systems engineering(MBSE) plays a significant role in the design of aircraft. In this paper, an architecture design approach based on MBSE applied in aircraft provide guidance system is introduced. Top-level requirements and stakeholder’s needs captured through scenario analysis are inputs to functional analysis. Functional architecture produced by functional analysis which includes functional definition and decomposition. Capturing requirements through functional architecture. Physical architecture which is implementation of functional architecture to ensure that the final solution meets stakeholder needs. © 2024 SPIE.

关键词： Functional analysis

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Signal design for Integrated Radar Communication System based on Constant Envelope OFDM-Chirp 15

Signal Design for Integrated Radar Communication System base...

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15th International conference on Signal Processing systems, ICSPS 2023

作者： Yang, Zeyu Li, Peng Liu, Jinhui Ji, Yanyu Xie, Renhong Rui, Yibin School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing210094 China

ISBN: (纸本)9781510675056

Radar communication integration is one of the development directions of multifunctional combat systems. design of integrated signal that can realize radar and communication functions is the main method to build an integrated system. In this paper, a constant envelope OFDM-Chirp integrated signal based on phase coding (CE-PC-OFDM-Chirp) is proposed. By analyzing the ambiguity function of the signal, the simulation results show that the proposed integrated signal has low distance sidelobe, narrow velocity main lobe and good error performance. © 2024 SPIE.

关键词： Orthogonal frequency division multiplexing

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optical system design with wide temperature range and long focal length based on linear thermal expansion opto-mechanical model 6

Optical system design with wide temperature range and long f...

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6th conference on Frontiers in optical Imaging and Technology: Novel Technologies in optical systems

作者： Zhang, Xuanzhi Chang, Weijun Zhang, Bo Teng, Guoqi Xi'an Institute of Applied Optics Shaanxi Xi'an710065 China

ISBN: (数字)9781510679672

ISBN: (纸本)9781510679665

With the growth of military demand for multi-spectrum, high-resolution, long-range photoelectric reconnaissance and surveillance, large-aperture multispectral optical system with common aperture is widely used in airborne optoelectronic mission payloads. At the flight altitude of 10000 meters, the optical system actually works at -30°C ambient temperature, while it is assembled and tested at room temperature. Therefore, the airborne optical system should ensure excellent image performance in the wide temperature range, such as from -50°C to +70°C. A large aperture catadioptric optical system with long focal length is designed. The optical model with zoom multi-configuration structures at room temperature, high temperature and low temperature is established, and it is based on the linear thermal expansion thermal-structural-optical integrated model. optical focusing variables are introduced at high temperature and low temperature to optimize the image quality at the respective temperature. The optical system has excellent image performance at both high temperature and low temperature. The design results show that the waveband is 0.7μ∼0.9μm. The MTF of the catadioptric optics with relative aperture F/3.6 and focal length 900mm is close to the optical diffraction limit at +20°C, -50°C and +70°C, which ensures good image quality from -50°C to +70°C. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： optical systems

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The REVHEAL Project: design of Pilot-Scale Prototypes of Masonry Cross Vaults 5th

The REVHEAL Project: Design of Pilot-Scale Prototypes of Mas...

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5th International conference on Protection of Historical Constructions-PROHITECH

作者： Monaco, Alessia Venuti, Fiammetta Alforno, Marco Ferrero, Chiara Matta, Emiliano Sammartano, Giulia Facconi, Luca Gandelli, Emanuele Minelli, Fausto Politecn Torino Dept Architecture & Design Turin Italy Univ Brescia Dept Civil Engn Architecture Environm Land Planni Brescia Italy

ISBN: (纸本)9783031873188;9783031873164;9783031873157

The project REVHEAL (Structural Rehabilitation of Vaults in Heritage Asset Learning: collapse identification and design of compatible strengthening systems supported by adaptive 3D models) focuses on the identification of the main collapse mechanisms of masonry cross vaults under differential horizontal displacements and the design of sustainable strengthening systems, both items supported by the development of novel 3D adaptive models. These objectives are pursued by means of two experimental campaigns, on small-scale and full-scale specimens, respectively. The experiments on both scale specimens are supported by 3D digital models based on point clouds and multi-scale approximated surface objects, aimed at accurately detecting the crack patterns. This paper focuses on the structural conceptual design of a pilot-scale prototype of a 3D-printed cross vault subjected to opening and shear sliding of two abutments under a quasi-static regime. The specimen is made of dry-assembled plastic blocks and represents the 1:5 scale of a real vault with a span of approximately 3 m. The paper illustrates the design phases of the mock-up prototype and the procedure adopted for the 3D printing and assemblage of the blocks. The design of the test set-up is supported by the results of preliminary FE analyses for the calibration of the expected maximum forces and displacements.

关键词： masonry cross vaults small-scale tests test set-up reality-based models FE analyses

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