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

共 444 条记录，以下是241-250 订阅

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Proceedings of SPIE - The International Society for optical engineering: Introduction

Proceedings of SPIE - The International Society for Optical ...

引用

current developments in lens design and optical engineering XII;and Advances in Thin Film Coatings VII

作者： Johnson, R. Barry Mahajan, Virendra N. Thibault, Simon Alabama A and M University United States Aerospace Corporation United States ImmerVision Canada University Laval Canada

This PDF file contains the front matter associated with SPIE Proceedings Volume 8128, including the Title Page, Copyright information, Table of Contents, Introduction, and the conference Committee listing. © 2011... 详细信息

ISBN: (纸本)9780819487384

关键词： optical engineering

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Effects of Substrate heating and Vacuum Annealing on optical and Electrical Properties of Alumina-Doped ZnO Films Deposited by DC Magnetron Sputtering

Effects of Substrate heating and Vacuum Annealing on Optical...

引用

conference on current developments in lens design and optical engineering XII/Advances in Thin Film Coatings VII

作者： Tang, Chien-Jen Wang, Chun-Yuan Jaing, Cheng-Chung Minghsin Univ Sci & Technol Dept Optoelect Syst Engn Hsinchu 304 Taiwan

ISBN: (纸本)9780819487384

Alumina-doped zinc oxide (AZO) films have wide range of applications in optical and optoelectronic devices. AZO films have advantage in high transparency, high stability to hydrogen plasma and low cost to alternative ITO film. AZO film was prepared by direct-current (DC) magnetron sputtering from ceramic ZnO:Al2O3 target. The AZO films were compared in two different conditions. The first is substrate heating process, in which AZO film was deposited by different substrate temperature, room temperature, 150 degrees C and 250 degrees C. The second is vacuum annealing process, in which AZO film with deposited at room temperature have been annealed at 250 degrees C and 450 degrees C in vacuum. The optical properties, electrical properties, grain size and surface structure properties of the films were studied by UV-VIS-NIR spectrophotometer, Hall effect measurement equipment, x-ray diffraction, and scanning electron microscopy. The resistivity, carrier mobility, carrier concentration, and grain size of AZO films were 1.92x10(-3) Omega-cm, 6.38 cm(2)/Vs, 5.08x10(20) #/cm(3), and 31.48 nm respectively, in vacuum annealing of 450 degrees C. The resistivity, carrier mobility, carrier concentration, and grain size of AZO films were 8.72x10(-4) Omega-cm, 6.32 cm(2)/Vs, 1.13x10(21) #/cm(3), and 31.56 nm, respectively, when substrate temperature was at 250 degrees C. Substrate heating process is better than vacuum annealed process for AZO film deposited by DC Magnetron Sputtering.

关键词： Alumina-Doped ZnO films DC magnetron sputtering vacuum annealed substrate heating process optical properties Electrical properties

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Testing and design of a low-cost large scale solar simulator

Testing and design of a low-cost large scale solar simulator

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conference on current developments in lens design and optical engineering XII/Advances in Thin Film Coatings VII

作者： Meng, Qinglong Wang, Yuan Changan Univ Sch Environm Sci & Engn 12 Yanta Rd Xian 710054 Shaanxi Provinc Peoples R China Xi An Jiao Tong Univ Sch Energy & Power Engn Xian 710049 Shaanxi Provinc Peoples R China

ISBN: (纸本)9780819487384

To simulate solar radiation at the earth's surface, a new economical multiple-lamp solar simulator was designed. The solar simulator is comprised of 188 reflector sunlight dysprosium lamps whose light spectrum is very similar to air mass 1.5 (AM1.5) solar spectrum terrestrial standards. Lamps are configured in a hexagonal pattern with 15 columns of 12 or 13 lamps at a lamp-to-lamp spacing and column-to-column spacing of 295mm. Without altering the radiation spectral distribution, the average irradiance on target irradiated area can be adjusted over a wide range between 150 and 1100W/m(2) by means of the variation of lamps number or/and lamp-to-irradiated area distance. At the height of 2.0m the solar simulator provides 2mx1.5m irradiated area with over 1000 W/m(2). Measurement of irradiance indicates that the multiple-lamp simulator conforms to Class B of ASTM (American Society for Testing and Materials) Standard (ASTM E927-2005) in regard to spectrum match, irradiance uniformity and stability. To enlarge the effective irradiated area, two large mirror-like stainless steel plates was mounted on both of the long sides of the solar simulator. The radiation characteristics of simulator are improved and the optimized effectively irradiation surface is expanded up to 81.6%.

关键词： solar simulator irradiance nonuniformity temporal instability

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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...

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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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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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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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optical design of the JWST Fine Guider Sensor

Optical Design of the JWST Fine Guider Sensor

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

作者： Zheng, Sheng Hai Evans, Clinton COMDEV Int Ltd Ottawa ON K2K 3J1 Canada

ISBN: (纸本)9780819482822

The Fine Guidance Sensor (FGS) is part of the science instrumentation for the James Webb Space Telescope (JWST). The FGS is required to operate at 37 K and provide the data needed to facilitate fine pointing and attitude stabilization necessary to meet the requirements of the mission's science and engineering operations. We describe here the selection of the proper optical design form to meet requirements and its relative merits. The FGS has progressed with the successful completion of several key design reviews. The optical design of the current stage will be discussed here in detail.

关键词： Fine guidance sensor FGS James Webb space telescope JWST

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Analysis of opto-mechanical performance of a tunable liquid lens

Analysis of opto-mechanical performance of a tunable liquid ...

引用

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

作者： Santiago-Alvarado, A. Vazquez-Montiel, S. Gonzalez-Garcia, J. Munoz-Lopez, J. Campos Garcia, Manuel Univ Tecnol Mixteca Carre Acatlima Km 2-5 Huajupan De Leon Oaxaca Mexico Astron Inst Opt Elect Labs Puebla Mexico Univ Nacl Estadual Sao Paulo Mexico City DF Mexico

ISBN: (纸本)9780819482822

Recently in the micro-optical engineering area has been a grown in use of tunable liquid lenses because this lenses us allow versatility in the focusing range, also an easy handling and implementation. In the literature, many tunable lens models have been reported, but most of this work has been on describing the optical quality of the images, the opto-mechanical analysis is neglected. In this paper, an analysis of opto-mechanical of a tunable liquid lens is presented, for this;we show a finite element simulation of mechanical behavior and estimate how this influences in the optical performance of the lens. The liquid lens is composed of two elastic transparent membranes and of a cylindrical metallic mount.

关键词： Tunable liquid lens PDMS mechanical properties

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A novel approach for structural synthesis of zoom systems

A novel approach for structural synthesis of zoom systems

引用

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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