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

共 635 条记录，以下是601-610 订阅

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TEXAS-MEXICO MULTIMODAL TRANSPORTATION - developments IN MEXICO

TEXAS-MEXICO MULTIMODAL TRANSPORTATION - DEVELOPMENTS IN MEX...

引用

conference on Coupling Technology to National Need

作者： BOSKE, LB UNIV TEXAS LYNDON B JOHNSON SCH PUBL AFFAIRSUNIV STNAUSTINTX 78713

ISBN: (纸本)0819413879

This presentation highlights the results of a recently completed study that examines the Texas-Mexico multimodal transport system already in place, current plans for improvements or expansion, and opportunities and constraints faced by each transport mode - motor carriage, rail, maritime, and air. Particular emphasis is given to findings regarding transportation developments in Mexico. The study concludes that in Mexico, all modes are working at establishing new services and strategic alliances, intermodal arrangements are on the rise, and private-sector participation in infrastructure improvements is growing daily at Mexican seaports and airports as well as within that nation's highway and rail systems. This presentation looks at developments that concern privatization, deregulation, infrastructure improvements, financing arrangements, and new services in Mexico.

关键词： Computing systems Control systems Networks Inspection Roads Control systems design Reliability Standards development Telecommunications Equipment and services

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FISHEYE PROJECTION LENS FOR LARGE-FORMAT FILM

FISHEYE PROJECTION LENS FOR LARGE-FORMAT FILM

引用

conference on current developments in optical design and optical engineering III

作者： DOSHI, R HUGHES LEITZ OPT TECHNOL MIDLAND L4R 2H2ONCANADA

In this paper, we present a new fisheye projection lens for 8 perforation 70 mm format film. The lens has an aperture of F/2.4 and a total field of view of 163 degree(s). We discuss design considerations, and compare ... 详细信息

ISBN: (纸本)081941249X

关键词： Modulation transfer functions Distortion Lens design Projection systems Glasses Tolerancing Laminated object manufacturing Optics manufacturing Spatial frequencies Manufacturing

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BEAM design OF A NONCOOPERATivE INTERFEROMETER

BEAM DESIGN OF A NONCOOPERATIVE INTERFEROMETER

引用

conference on current developments in optical design and optical engineering III

作者： HOLSCHER, M HOLZAPFEL, W UNIV KASSEL INST MEASUREMENT & AUTOMATD-34109 KASSELGERMANY

ISBN: (纸本)081941249X

An optical minimum configuration of a laser interferometer for noncooperative scattering objects is investigated. An optimization of the SNR (signal-to-noise ratio) of the homodyne receiver is achieved by beam design. Scattering measurement object surfaces generate a speckle pattern on the detector surface which influences the SNR. Within the whole operating range of the optics, the transmitted light spot on the surface under investigation should therefore be small. The receiving optics should image the light spot onto the detector surface. The detection of a noncooperative object in a distance of 26 m is proven experimentally.

关键词： Interferometers

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ALGEBRAIC APPROACH FOR OPTIMIZING A TRIPLET LENS

ALGEBRAIC APPROACH FOR OPTIMIZING A TRIPLET LENS

引用

conference on current developments in optical design and optical engineering III

作者： KASSIM, AM AL QUDS UNIV COLL SCI & TECHNOLDEPT PHYSJERUSALEMISRAEL

ISBN: (纸本)081941249X

Using the concept of matrix theory for lens design, a triplet lens can be replaced by a singlet lens which has an equivalent system matrix without changing its optical performance. Then, using third order Siedel's first aberration coefficient of the singlet lens is equal to zero, and the focal length and the physical length of the triplet lens are kept constant as constraints, an algebraic technique for optimizing a triplet lens is derived. Results show that this new optimizing technique is more effective than other conventional techniques for optimizing a triplet lens in the case of plane waves.

关键词： Lens design Electronic filtering Monochromatic aberrations Refractive index Spherical lenses Geometrical optics optical design optical properties Physics Image quality

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EFFECT OF FABRICATION ERRORS ON BINARY PHASE GRATING

EFFECT OF FABRICATION ERRORS ON BINARY PHASE GRATING

引用

conference on current developments in optical design and optical engineering III

作者： LU, ZW QIAN, LS LIAO, JH WENG, ZC CHANGCHUN INST OPT & FINE MECH STATE KEY LAB APPL OPTCHANGCHUN 130022PEOPLES R CHINA

ISBN: (纸本)081941249X

Based on scale diffraction theory, binary phase gratings are designed and the effect of fabrication errors on the diffraction efficiency and uniformity is discussed. The theoretical and numerical analysis shows that (0, non-(pi) ) grating is more sensitive to phase delay error than (0, (pi) ) grating. Patterning error is very complex to analyze, but we can give a maximum intensity deviation to the grating.

关键词： Diffraction gratings Binary data Diffraction optical design Error analysis optical lithography Etching Phase shift keying Neural networks optical signal processing

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THEORETICAL-ANALYSIS OF THE optical BISTABILITY WITH FARADAY-EFFECT

THEORETICAL-ANALYSIS OF THE OPTICAL BISTABILITY WITH FARADAY...

引用

conference on current developments in optical design and optical engineering III

作者： HIRANO, M HOYA CORP CTR DEVICE DEVAKISHIMATOKYO 196JAPAN

ISBN: (纸本)081941249X

We have proposed and discussed that an introduction of the Faraday medium to the optical bistable devices brings new and good characteristics on the application to optical sensing. In this paper, characteristics of the optical bistability are analyzed theoretically for the optical bistable operation with the Faraday effect, the threshold power, and several parameter dependences of the characteristic. Consequently, by controlling them with an external magnetic field which is an operatable factor, the optical bistability shows much usefulness and effectiveness by the following points: the controllability of the bistable operation, the reduction in the threshold power, and the enlargement in the discontinuous power variation ratio.

关键词： Bistability Ear Magnetism Absorption Polarization Thermography Resonators Bismuth Reflection Refractive index

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optical design, SIMULATION AND TESTING OF AN ADDRESSABLE 64X64 LIQUID-CRYSTAL PHASE PLATE

OPTICAL DESIGN, SIMULATION AND TESTING OF AN ADDRESSABLE 64X...

引用

conference on current developments in optical design and optical engineering III

作者： PURVIS, A BAILEY, NJ LOVE, GD MAJOR, JV UNIV DURHAM SCH ENGN & COMP SCIDURHAM DH1 3LEENGLAND

ISBN: (纸本)081941249X

The correction of phase aberrations in optical systems using an adaptive liquid crystal phase screen having 64 X 64 pixels is considered. These adaptive components have advantages over deformable mirror systems in that liquid crystal technology is relatively inexpensive and large pixelation densities can be achieved. In particular we address the application of these devices to astronomical adaptive optics. A simulator of the phase correction plate at work using time changing distorted wave fronts is described. Preliminary measurements of the optical flatness and response times of the prototype device are discussed.

关键词： Liquid crystals Adaptive optics optical simulations optical design Prototyping Wavefronts Astronomical adaptive optics Atmospheric modeling Device simulation Switches

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design OF THE MULTIWAVELENGTH SCOPHONY INFRARED SCENE PROJECTOR

DESIGN OF THE MULTIWAVELENGTH SCOPHONY INFRARED SCENE PROJEC...

引用

conference on current developments in optical design and optical engineering III

作者： THOMPSON, KP KIRCHER, JR MARLOW, SA KORNISKI, RJ RICHWINE, RA OPT RES ASSOCIATES FRAMINGHAMMA 01701

ISBN: (纸本)081941249X

An all acousto-optic infrared scene projector (IRSP) has been developed for use in evaluating thermal-imaging guidance systems at the Kinetic Kill Vehicle Hardware-in-the-Loop Simulator (KHILS) facility located at Elgin AFB, Florida. The IRSP is a laser source based projector incorporating Scophony illumination and scanning methods to produce 96 X 96 pixel multi-wavelength images at very high frame rates (400 Hz). The IRSP is composed of five functionally similar optical trains, four of which are fed with a different `color' infrared laser. The separate scenes from each optical train are then combined and projected simultaneously into the imaging guidance system.

关键词： Projection systems Acousto-optics Diffusers optical design Scanners Relays Laser sources Infrared radiation Infrared imaging Thermography

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PREPARATION OF GI PLASTIC RODS BY INTERFACIAL-GEL COPOLYMERIZATION

PREPARATION OF GI PLASTIC RODS BY INTERFACIAL-GEL COPOLYMERI...

引用

conference on current developments in optical design and optical engineering III

作者： YOUNG, SY CHANG, YH HO, BC CHEN, JJ HSU, HY HU, WH TSENG, TW LEE, MS ITRI UNION CHEM LABSHSINCHUTAIWAN

ISBN: (纸本)081941249X

When gradient index rods (GI rods) were prepared by interfacial-gel copolymerization, the bulk polymerization caused serious shrinkage, which, in turn, resulted in inevitable defects. These defects in GI rods can be reduced by control of reaction conditions. Experimental results revealed that properly adjusting the reaction conditions such as concentrations of initiator, chain transfer agent, and/or temperature could reduce the viscosities of the reaction mixtures and could produce GI rods with a parabolic refractive index distribution.

关键词： Refractive index Polymerization optical fibers Bismuth Electroluminescence Phase only filters Transparency Gradient-index optics Lenses Local area networks

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WIDE-BAND MONITORING OF optical COATINGS WITH DEPOSITION ERROR-CORRECTION

WIDE-BAND MONITORING OF OPTICAL COATINGS WITH DEPOSITION ERR...

引用

conference on current developments in optical design and optical engineering III

作者： WU, PY GU, PF TANG, JF ZHEJIANG UNIV DEPT OPT ENGNHANGZHOU 310027PEOPLES R CHINA

ISBN: (纸本)081941249X

The manufacture of complex multilayers requires the maker to have a satisfactory monitoring system. The monitoring system can control accuracy not only in optical thicknesses of nonquarterwave layers but can also compensate deposition errors in real-time in order to secure a stable monitoring and eventually to achieve the desired optical performance. In this paper, a computer controlled apparatus for monitoring of wideband optical coatings is described. A method, based on performance measurements during the monitoring of a layer in situ, has been developed to determine the actual refractive index and thickness of the layer in vacuo. The method can be used as a means of detecting deposition errors.

关键词： Multilayers optical coatings Reflectivity Optics manufacturing Control systems Osmium Error analysis Feedback control In situ metrology Refractive index

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