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检索条件"任意字段=Current Developments in Optical Design and Optical Engineering II"

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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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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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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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PROPAGATION METHODS FOR THE ANALYSIS OF BISTABLE DEVICES AND SPATIAL LIGHT MODULATORS BASED ON NONLINEAR MOLECULAR MEDIA

PROPAGATION METHODS FOR THE ANALYSIS OF BISTABLE DEVICES AND...

引用

Conference on current developments in optical design and optical engineering iiI

作者： SPEISER, S GROSWASSER, D ORENSTEIN, M TECHNION ISRAEL INST TECHNOL DEPT CHEMIL-32000 HAIFAISRAEL

ISBN: (纸本)081941249X

We already discussed the bistable behavior of a Fabry Perot resonator filled with molecular media as well as the characteristics of a spatial light modulator (SLM) based on the nonlinearity induced by excited state absorption. In the present paper we present two practical configurations. First we analyze a cavity-less bistable element which removes some of the realization problems related to high finess cavity. In this configuration the nonlinear medium is located in one arm of an optical interferometer. The scheme provides the required amount of positive feedback by the bistable mechanism -- but without a cavity. We applied the nonlinear eikonal approximation, a method which takes care of the detailed propagation effects, and obtained conditions for bistability, as well as optimizing the design parameters such as the output mirror reflectivity, etc.

关键词： optical fibers Nonlinear optics Spatial light modulators Bistability Interferometers Mirrors Absorption Reflectivity Beam propagation method Resonators

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SOLID MODELING OF optical-COMPONENTS AND RAY-TRACING

SOLID MODELING OF OPTICAL-COMPONENTS AND RAY-TRACING

引用

Conference on current developments in optical design and optical engineering iiI

作者： FINKLER, R OPTRAM LTD IL-43106 RAANANAISRAEL

ISBN: (纸本)081941249X

optical systems are traditionally represented by a sequential series of `optical surfaces' that are ordered in the same manner experienced by light traveling from an object to an image point through the system. The actual system is composed of 3-D components which include these `active optical surfaces' as the external surface of the component. Modern simulation technology is based on solid modeling which provides a very close representation to the actual system and enables computer integrated manufacturing by being accurate and comprehensive enough for fabrication. The classical method to analyze an optical system is based on ray tracing, a technique based on geometrical optics where light propagation is assumed to be simulated by rays from the object to the image point. Each ray is represented by a linear vector traveling through the system to the evaluation plane by iterations. Each step calculates the propagation between two successive surfaces in a sequential order. The shift from `sequential surfaces' representation to `solid models,' which changes the classical method of ray tracing, but offers a variety of new analytical opportunities, is discussed.

关键词： Ray tracing Solids Geometrical optics Optics manufacturing Solid modeling optical components 3D modeling Data modeling Systems modeling Visualization

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Caustic analysis based on higher-order asymptotic stress field of mode ii crack tip of nonuniform propagation

Caustic analysis based on higher-order asymptotic stress fie...

引用

current developments in optical design and optical engineering iiI

作者： Fang, Jing Zhao, Ya-Pu Qi, J. Peking Univ. Beijing China

ISBN: (纸本)081941249X

An interpretation of the dynamic caustics of optical shadow is presented for the mode ii nonuniformly propagating crack by considering the higher-order expansion of the stress field near the crack tip. The asymptotical analysis of the local stress involves not only the instantaneous speed v(t) of the moving crack tip and the instantaneous stress intensity factor Kii(t) but their time derivatives dv(t)/dt and dKii(t)/dt as well. Through the gradient of the nearfield stress distribution with radial coordinate terms of r-½ and r½, the mapping equations of the optical shadows of dynamic caustics are obtained for the fast running crack of shear mode.

关键词： Light propagation

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optical system design of the Voltage ImagingTM optical subsystem (VIOS) in AMLCD in-process test system (IPT)

Optical system design of the Voltage ImagingTM optical subsy...

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current developments in optical design and optical engineering iiI

作者： Liu, Ying-Moh Fong, David Y. Photon Dynamics Inc. Milpitas CA USA

ISBN: (纸本)081941249X

Photon Dynamics' IPT system provides high throughput and excellent voltage measurement sensitivity on an AMLCD panel. It is based upon an electro-optical technology to measure the voltage stores on an LCD pixel of an AMLCD active plate. This paper discusses the system performance requirements. From these we derive the optical subsystem requirements. The optical design form and its performance are presented. The current system status, system design issues, and the future improvements also are discussed.

关键词： optical systems

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engineering an agile beam director for laser radar

Engineering an agile beam director for laser radar

引用

current developments in optical design and optical engineering iiI

作者： Neff, Brian W. Dunn, Murray R. ThermoTrex Corp. San Diego CA USA

Beam agility for large aperture optical systems has proven to be a challenging engineering problem. This paper describes optical engineering issues of an agile, 1/2 meter aperture, 30° field of regard telescope. ... 详细信息

ISBN: (纸本)081941249X

关键词： optical radar

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Advantage of nonlinear axial gradients in optical design

Advantage of nonlinear axial gradients in optical design

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current developments in optical design and optical engineering iiI

作者： Manhart, Paul K. Castle, Kenneth R. Ruda, Mitchell C. Stuhlinger, Tilman W. Lightpath Technologies Inc. Tucson AZ USA

ISBN: (纸本)081941249X

Recent advances in axial gradient material fabrication via the diffusion of glass plates has opened the door to a wide variety of optical design applications incorporating entire lenses of gradient index material. A proprietary software-driven process developed at LightPath Technologies Inc. creates gradient index glass by fusing together a stack of discrete glass plates, where each constituent plate has a distinctive composition and desired optical properties. LightPath's ability to prescribe large optical index changes (up to 0.47) throughout a glass substrate of virtually any diameter and thickness (macro gradient), invokes an interesting question: what are the properties of a solid gradient index lens and how can these properties be used most efficiently and effectively? This paper reports on a parametric study of third order spherical aberration vs. shape factor, for a macro gradient F/3 singlet lens whose index varies by ± 0.4 in linear, quadratic and cubic profiles.

关键词： Nonlinear optics

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