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

共 530 条记录，以下是231-240 订阅

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2011 International conference on optical Instruments and Technology: optical systems and Modern Optoelectronic Instruments

2011 International Conference on Optical Instruments and Tec...

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2011 International conference on optical Instruments and Technology: optical systems and Modern Optoelectronic Instruments

ISBN: (纸本)9780819488381

The proceedings contain 52 papers. The topics discussed include: applications of optical measurement technology in pollution gas monitoring at thermal power plants;long distance measurement with submicrometer accuracy;stereo vision system based on the laser dot matrix projection;an off-axis optical system design applied in the precision measurement of axle hole's inner diameter;the instrument of high-precision photoelectric autocollimator based on PSD;comparison of wavefront reconstruction with modal method and zonal method for the inspection of catadioptric projection optics using Hartmann wavefront sensor;analysis of microstructure heights error of multilayer diffractive optical elements for far infrared optical system;design and test of a high-contrast imaging coronagraph based on two 50-step transmission filters;and developments in modern panoramic lenses: lens design, controlled distortion, and characterization.

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Adaptive optics on Petawatt lasers;current performance of the Texas Petawatt Laser

Adaptive optics on Petawatt lasers;current performance of th...

引用

conference on Laser Resonators and Beam Control XIII

作者： Martinez, Mikael Gaul, Erhard Borger, Teddy Aymond, Frances Hammond, Douglas Ringuette, Marty Escamilla, Ramiro Ditmire, Todd Caird, John Erlandson, Al Iovanovic, Igor Ebbers, Chris Molander, Bill Univ Texas Austin 2511 Speedway C1510 Austin Austin TX 78712 USA Lawrence Livermore Natl Lab Livermore CA 94550 USA

ISBN: (纸本)9780819484505

In this paper, we report on current developments aimed at improving the focusability of the Texas Petawatt Laser. Two major campaigns have been commissioned that address the issue of focusability. First, we implemented a closed loop, 32 actuator bi-moprh deformable mirror (DFM) to compensate for aberrations in the optical train and second, a color corrector lens assembly was installed that compensates for chromatic errors accumulated in broadband (>15 nm), large aperture (> 20 cm) laser systems. We will present in detail, pre and post correction results with the DFM and describe challenges faced when one activates a single shot, high energy closed loop system. Secondly, we will provide modeling and experimental results of our color correction system. This is a novel approach to a problem only seen in high energy, broadband, large aperture laser pulses. By using color correction optics we have demonstrated a 6X increase in focal intensity. With the installation of the DFM, the rms wavefront error in the system was reduced from 2.4 waves to. 131 waves, further increasing intensities seen at focus by 1 order of magnitude.

关键词： Wavefronts design for manufacturing Diagnostics Laser systems engineering Amplifiers Pulsed laser operation Adaptive optics Crystals Mirrors Wavefront sensors

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Revisiting Naur’s programming as theory building for Enterprise Architecture modelling

Revisiting Naur’s programming as theory building for Enterp...

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23rd International conference on Advanced Information systems engineering, CAiSE 2011

作者： Barn, Balbir S. Clark, Tony Middlesex University HendonLondonNW4 4BT United Kingdom

ISBN: (纸本)9783642216398

The recent burgeoning interest in Enterprise Architecture and its focus on artifact driven methods is taken as a motivation for the re-appraisal of Peter Naur’s notion of "programming as theory building". Naur strongly disputes the value of the role and orientation of the IS discipline around artifacts and argues that algorithmic methods do not lead to a theory of a domain. Such a viewpoint provides an alternative lens with which to view current developments and may lead to additional insights by providing the reader with a source for questioning and reflecting critically on the re-focusing of method design on conversation rather than artifact production. It is suggested that such a conversational framework based on Toulmin and Pask may provide a means to establish and test theory building views of enterprise architecture. © 2011, Springer-Verlag Berlin Heidelberg.

关键词： Information systems

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A novel approach for structural synthesis of zoom systems

A novel approach for structural synthesis of zoom systems

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Hazra, L. N. Pal, S. Univ Calcutta Dept Appl Opt & Photon Kolkata India

ISBN: (纸本)9780819482822

A new approach for 'ab initio' synthesis of thin lens structure of zoom lenses is reported. This is accomplished by an implementation of evolutionary programming, based on Genetic Algorithm, which explores the available configuration space formed by powers of individual components and inter-component separations. Normalization of the variables is carried out to get an insight on the optimum structures. The method has been successfully used to get thin lens structures of mechanically compensated, optically compensated, and linearly compensated zoom lens systems by suitable formulation of merit function of optimization. Investigations have been carried out on three component and four component zoom lens structures. Illustrative numerical results are presented.

关键词： optically compensated zoom lenses mechanically compensated zoom lenses evolutionary programming genetic algorithm thin lens design

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design and Implementation of Recording and Readout System for Micro-holographic optical Data Storage

Design and Implementation of Recording and Readout System fo...

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Takashima, Yuzuru Hesselink, Lambertus Stanford Univ Dept Elect Engn Stanford CA 94305 USA

A lens design having constant working distance while having variable recording depth for micro holographic data storage system has been proposed. Variation of focal length is suppressed for the entire depth within 1% ... 详细信息

ISBN: (纸本)9780819482822

关键词： Holographic Storage Aberrations lens design

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Dynamic modeling of optical systems in order to study vibration effect on performance

Dynamic modeling of optical systems in order to study vibrat...

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Avsar, Ahmet Levent Ozguven, H. Nevzat ASELSAN Inc MGEO Headship PK 30 TR-06011 Ankara Turkey Middle E Tech Univ Dept Engn Mech TR-06531 Ankara Turkey

ISBN: (纸本)9780819482822

In order to determine the vibration effects on performance in optical system, a simple vibratory model is proposed. The model suggested is compared with FE model. Both models are validated by modal tests for an existing simple optical system. The material properties of adhesive, which play an imported role in the vibratory model of an optical system, are found experimentally by using a simple test setup. The model suggested is used to investigate the dynamic behavior of the optical system under random vibration load conditions. It is concluded in this study that the analytical model suggested can successfully be used in preliminary design stage of simple optical systems when optical housing and lens behave rigidly in the frequency range of interest.

关键词： Dynamic Analysis optical Performance optical System

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Ultra-compact close-up microoptical imaging system

Ultra-compact close-up microoptical imaging system

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Brueckner, Andreas Duparre, Jacques Wippermann, Frank Leitel, Robert Dannberg, Peter Braeuer, Andreas Fraunhofer Inst Appl Opt & Precis Engn D-07745 Jena Germany

ISBN: (纸本)9780819482822

Although several applications of machine vision and biomedical imaging ask for the close-up imaging of extended object fields, only few, mostly bulky solutions exist. We demonstrate the optical design and realization of an ultra-compact close-up imaging system with unity magnification. It uses a multi-aperture approach in order to shorten its total track length to less than 4 mm while achieving a large field of view. The system is made of a stack of several two-dimensional arrays of refractive microlenses. The potential of this setup lies in the combination of digital imaging with microoptical fabrication techniques leading to thin optical components which can be directly attached to an image sensor. Hence, these systems fit into tight spaces and they achieve a high resolution without scanning.

关键词： Imaging imaging systems microoptics optical design image processing multichannel multi-aperture cameras vision image sensors

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High efficiency LED street light using micro-lens array

High efficiency LED street light using micro-lens array

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Lee, Xuan-Hao Sun, Ching-Cherng Natl Cent Univ Inst Lighting & Display Sci Dept Opt & Photon Chungli 320 Taiwan

In the paper, we present a design of street light with use of a TIR lens and a specific diffuser of micro-lens array. In the illumination area of 39 m x 16.4 m, the power, output flux and the efficiency of the street ... 详细信息

ISBN: (纸本)9780819482822

关键词： light emitting diode street light micro-lens array diffuser

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High performance of color mixing and projection lighting based on color LEDs

High performance of color mixing and projection lighting bas...

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Chien, Wei-Ting Ho, Shin-In Tsai, Chang-Yu Sun, Ching-Cherng Natl Cent Univ Inst Lighting & Display Sci Dept Opt & Photon Chungli 320 Taiwan

ISBN: (纸本)9780819482822

In this paper, we propose and demonstrate a novel design to make color mixing and projection of RGB LEDs. The optical elements include a high reflective light pipe, a volume scattering diffuser and a TIR lens. The system optical efficiency is around 46 % while the color is well mixing for the cases at the CCTs of 6500K, 4500K and 3000K.

关键词： color mixing RGB LEDs TIR lens diffuser correlated color temperature

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Barium Fluoride and glass combinations for short-wave infrared designs

Barium Fluoride and glass combinations for short-wave infrar...

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conference on current developments in lens design and optical engineering XI - and Advances in Thin Film Coatings VI

作者： Warren, D. W. Aerosp Corp Visible & Infrared Sensor Syst Dept Los Angeles CA 90009 USA

ISBN: (纸本)9780819482822

Achromatic doublet theory is recast for the 1-2.5 mu m short-wavelength infrared band, suggesting the desirability of combining barium fluoride with specific high index optical glasses having large differences in primary SWIR dispersion and small differences in partial SWIR dispersion. Candidate combinations of materials are screened empirically using the performance of optimized f/3 airspaced achromatic doublets employing barium fluoride as the positive element. Polychromatic RMS geometric image spot sizes appear to increase quadratically with difference in partial SWIR dispersion between barium fluoride and the complementary glasses. Examples of complex (fast, wide field) systems demonstrate the utility of the most promising combinations.

关键词： lens design infrared barium fluoride achromatic astronomy

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