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

共 444 条记录，以下是261-270 订阅

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Electro-chromic device with GZO as a conductive layer

Electro-chromic device with GZO as a conductive layer

引用

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

作者： Chan, Chih-Chao Tang, Chien-Jen Lee, Kun-Hsien Jaing, Cheng-Chung Kuo, Chien-Cheng Chen, Hsi-Chao Lee, Cheng-Chung Natl Cent Univ Thin Film Technol Ctr Dept Opt & Photon Chungli 320 Taiwan MingHusin Univ Sci & Technol Dept Appl Mat & Optoelect Engn Hsinchu Taiwan Natl Yunlin Univ Sci & Technol Grad Sch Optoelect Yunlin Taiwan

ISBN: (纸本)9780819482822

Thin films of tungsten oxide (WO3) were deposited on GZO-coated B270 glass substrates and thin films of Ta2O5 were deposited on B270 glass substrates by electron beam gun evaporation at high vacuum pressure of 3x10(-5) Torr and varied oxygen pressures ranging from 1.0x10(-4) to 6.0x10(-4) Torr. The optical properties of the electro-chromic (EC) film were measured by a spectrophotometer. The optical modulation (Delta T) of the tungsten oxide thin film deposited at an oxygen pressure of 1.0x10(-4) Torr was found to be Delta T = 67.46% at lambda=550nm. The optimum optical properties for deposition of Ta2O5 were attained at an oxygen pressure of 4x10(-4) Torr. Gallium doped zinc oxide (GZO) was used as a conductive layer instead of ITO. A five layer EC device (Glass/GZO/WO3/Ta2O5/NiO/Al) has been design and fabricated.

关键词： Electro-chromic devices transparent conducting oxide tungsten oxide optical modulation

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Improving the optical and electrical properties of fluorine-doped tin oxide films by various post-annealing treatments

Improving the optical and electrical properties of fluorine-...

引用

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

作者： Chen, Pin-Jen Liao, Bo-Huei Kuo, Chien-Cheng Lee, Cheng-Chung Natl Cent Univ Thin Film Technol Ctr Dept Opt & Photon Chungli 320 Taiwan

ISBN: (纸本)9780819482822

Transparent conducting Fluorine-doped tin oxide (FTO) thin films were deposited on glass substrates by pulsed DC magnetron sputtering from cost saving metal targets. We observed lower resistivity and higher average transmittance in the visible range after the application of various post heating treatments. The electrical and optical properties of FTO films were investigated. When the annealing temperature is 400 degrees C in air, the average transmittance is 79.79% with the lowest resistivity of 1.38x10(-3) Omega-cm, carrier density of 2.27x10(20) cm(-3) and mobility of 20 cm(2)/V-s. When the annealing temperature is 400 degrees Cin a H-2 5%+N-2 95% atmosphere, the average transmittance is 79.75 % with the lowest resistivity of 1.26x10(-3) Omega-cm, carrier density of 2.17x10(20) cm(-3) and mobility of 22.8 cm(2)/V-s. When the annealing temperature is 350 degrees Cin vacuum, the average transmittance is 80.48% with the lowest resistivity of 1.23x10(-3) Omega-cm, carrier density of 4.40x10(20) cm(-3) and mobility of 11.6 cm(2)/V-s.

关键词： Pulse DC magnetron sputtering CF4 FTO TCO Post-annealing

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Bound-Abrasive Grinding and Polishing of Surfaces of optical Materials

Bound-Abrasive Grinding and Polishing of Surfaces of Optical...

引用

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

作者： Filatov, Yuriy D. Filatov, Olexandr Yu Monteil, Guy Heisel, Uwe Storchak, Michael Natl Acad Sci Ukraine Bakul Inst Superhard Mat 2 Avtozavodskaya UA-04074 Kiev Ukraine Natick Res Dev & Engn Ctr F-25000 Besancon France Univ Stuttgart D-70174 Stuttgart Germany

ISBN: (纸本)9780819482822

Problems of improving efficiency and quality of diamond-abrasive finishing of optical materials by tools with bounded polishing powders, including diamond powder, by means of the improvement of the machining technology and application of new tools with functionally oriented designs and characteristics of working layer are considered. A model has been proposed of the slime particle formation and directional removal as well as of the generation of a high-quality surface in diamond-abrasive finishing of optical materials taking into account the peculiarities of the mass transfer in the contact zone and statistic character of the distribution of slime particles by size. The dependences of the particle number on the diffusion angle and coordinate of the contact have been derived in the studies of the dynamics of collision and diffusion of slime particles. The coordinate dependence of the flat surface roughness of glass K8 optics in fine diamond grinding has been described. Interaction and dispersion of deterioration particles in a contact zone of the tool and a processed sample in the course of polishing is described and the dispersion structure of deterioration particles of the tool on slime particles and on deterioration particles is explained oscillatory. It is shown, that differential dispersion section of deterioration particles on slime particles no less than on deterioration particles as much as possible at corners of dispersion close to 0 and 180o on the central sites of a contact zone. Coordinate dependence of full dispersion section of deterioration particles of the tool and dependence of microprofile height of the processed surface on circular zones radius are calculated. Conformity of experimental and theoretical microroughness profiles of a polished surface on a quartz sample is shown.

关键词： Grinding Polishing optical materials Slime particles Collision Diffusion Roughness

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Flat liquid crystal diffractive lenses with variable focus and magnification

Flat liquid crystal diffractive lenses with variable focus a...

引用

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

作者： Valley, Pouria Dodge, Mohammad Reza Schwiegerling, Jim Mathine, David Peyman, Gholam Peyghambarian, N. Univ Arizona Coll Opt Sci Tucson AZ 85721 USA

ISBN: (纸本)9780819482822

Non-mechanical variable lenses are important for creating compact imaging devices. Various methods employing dielectrically actuated lenses, membrane lenses, and/or liquid crystal lenses were previously proposed(1-4). Here we present tunable-focus flat liquid crystal diffractive lenses (LCDL) employing binary Fresnel zone electrodes fabricated on Indium-Tin-Oxide using conventional micro-photolithography. The phase levels can be adjusted by varying the effective refractive index of a nematic liquid crystal sandwiched between the electrodes and a reference substrate. Using a proper voltage distribution across various electrodes the focal length can be changed. Electrodes are shunted such that the correct phase retardation step sequence is achieved. If the number of 2 pi zone boundaries is increased by a factor of m the focal length is changed from f to f/m based on the digitized Fresnel zone equation: f = r(m)(2)/2m lambda, where r(m) is m(th) zone radius, and lambda is the wavelength. The lenses operate at very low voltage levels (+/- 2.5V ac input), exhibit fast switching times (20-150 ms), can have large apertures (> 10 mm), and small form factor, and are robust and insensitive to vibrations, gravity, and capillary effects that limit membrane and dielectrically actuated lenses. Several tests were performed on the LCDL including diffraction efficiency measurement, switching dynamics, and hybrid imaging with a refractive lens. Negative focal lengths are achieved by adjusting the voltages across electrodes. Using these lenses in combination, magnification can be changed and zoom lenses can be formed. The promising results make LCDL a good candidate for non-mechanical auto-focus and zoom lenses.

关键词： Diffractive lenses Liquid-crystal devices Active or adaptive optics Non-mechanical optical zoom Auto-focus Telescopes

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New tools for the lens designer

New tools for the lens designer

引用

conference on current developments in lens design and optical engineering IX

作者： Dilworth, Donald C. Optical Systems Design Inc. (United States)

ISBN: (纸本)9780819472809

Several common impediments to successful lens design can be removed by application of new techniques. These involve using information that has long been calculated during the design process, but then discarded. Problems so addressed include the nuisance of discovering ray failures in the starting configuration, and that of tolerance desensitization, among others.

关键词： lens optimization ray failures tolerance desensitization starting point stop position avoiding strain

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optical design of reflective wide-field cameras

Optical design of reflective wide-field cameras

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conference on current developments in lens design and optical engineering IX

作者： Sasian, Jose Univ Arizona Coll Opt Sci Tucson AZ 85721 USA

ISBN: (纸本)9780819472809

This paper discusses some methodologies that apply to the optical design of reflective wide-field cameras. Among the methods considered are off-axis and eccentric pupil systems, concatenation of systems, tilted component systems, aberration theory, and confocal systems. The goal of the paper is to review design methods. In particular some systems are shown to illustrate two methodologies.

关键词： optical design mirror design wide-field reflective optics unobscured

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An optically passive athermal infrared optical system

An optically passive athermal infrared optical system

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conference on current developments in lens design and optical engineering IX

作者： Li, Hua Shen, Mangzuo Chinese Acad Sci Inst Opt & Elect Chengdu 610041 Sichuan Prov Peoples R China

ISBN: (纸本)9780819472809

An optically passive athermal infrared optical system working in the 8 - 12 micron long wavelength infrared band was designed by using a special infrared optical material AMTIR (amorphous material transmitting infrared radiation). The design principle, design results are described in this paper. In addition, the optical system was incorporated with an infrared focal plane array forming an infrared camera. The thermal test of imaging quality of this camera is also presented

关键词： infrared optical system optical design athermal optical system

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design Efficiency of 3188 optical designs

Design Efficiency of 3188 Optical Designs

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conference on current developments in lens design and optical engineering IX

作者： Cakmakci, Ozan Rolland, Jannick P. Thompson, Kevin P. Rogers, John Univ Cent Florida CREOL Coll Opt & Photon Orlando FL 32816 USA Opt Res Associates Pasadena CA USA

ISBN: (纸本)9780819472809

In this study, we take a data-driven approach to study the design efficiency of a variety of optical designs. Efficiency is defined to be the number of resolvable spots across the image per lens element. 3188 designs were selected from a commercially available lens database. Each design was imported into a raytrace code, briefly optimized, and the number of resolvable spots was computed. Examples of efficient designs within this dataset are shown. Four design efficiency groupings are created and discussed separately: 1) all-spherical, monochromatic designs, 2) monochromatic designs with some aspheres, 3) all-spherical, polychromatic designs, and 4) polychromatic designs with some aspheres. Zoom lens systems were excluded from the dataset. The results of the analysis are intended to answer the question of "how many elements does it take, as a minimum, to deliver a certain number of resolved spots?"

关键词： optical system design efficiency database analysis

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Day and Night Security Camera

Day and Night Security Camera

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conference on current developments in lens design and optical engineering IX

作者： Laikin, Milton Kweon, Gyeong-il Choi, Young-ho Laikin Opt Corp 4314 Marina City Dr 930 Marina Del Rey CA 90292 USA Honam Univ Dept Optoelect Gwangju 506090 South Korea Honam Univ Dept Informat & Commun Engn Gwangju 506090 South Korea

ISBN: (纸本)9780819472809

We have designed a fisheye lens with a field of view of 190 degrees and F# of 2.8 The diameter of the circular image plane is designed to fit within the width of the image sensor plane, so that a 190 degrees horizontal field of view can be obtained. It is composed of 8 spherical lens elements and the overall length is 35mm from the first lens surface to the image sensor plane. This fisheye lens operates simultaneously in the visible and the near infrared wavelength regions.

关键词： lens design near infrared visual wide-angle lens

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Automated design and fabrication of ocular optics

Automated design and fabrication of ocular optics

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conference on current developments in lens design and optical engineering IX

作者： Gutin, Mikhail Gutin, Olga Appl Sci Innovat Inc Troy NY 12180 USA

ISBN: (纸本)9780819472809

Automated computer-aided procedure for component selection, optical design, and optimization was developed and used to produce prototype ocular optics of a head-mounted display for biomedical imaging, with the field of view and resolution approaching those of normal human vision. The new display has the potential to dramatically increase the amount and fidelity of real-time visual information presented to the user. The selected approach was based on a tiled configuration and "optically stitched" virtual image, resulting in seamless imagery generated by multiple micro-displays. Several optical configurations were studied in the design stage, to arrive at the optimal optical layout. The automated procedure provided for extensive search of the best candidate stock components out of thousands of candidate lenses offered by different vendors. At each iteration, the candidate lens was "digitally inserted" in the optical layout, its position was optimized, and the achieved merit function characterizing the quality of the stitched image was stored, along with the design prescription. A few best designs were then closely evaluated in a traditional "manual" procedure. The design effort was followed by experimental demonstration and tests of a limited prototype optical system.

关键词： optical design lens design head mounted display HMD

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