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检索条件"任意字段=Current Developments in Optical Design and Optical Engineering 1991"

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Estimation of mounting-induced axial contact stresses in multi-element lens assemblies 4

Estimation of mounting-induced axial contact stresses in mul...

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current developments in optical design and optical engineering IV 1994

作者： Yoder, Paul R. Consultant in Optical Engineering 1220 Foxboro Drive NorwalkCT06851 United States

Prior publications dealing with techniques for estimating axial contact stresses in lenses mechanically clamped axially near their rims have assumed the lenses to be single elements. In this paper, we expand the theory to include multiple-element lenses such as cemented doublets and optomechanical designs with spacers or equivalent cell features between separated lenses. Examples are given to illustrate the use of these new analytical techniques. © 1994 SPIE. All rights reserved.

关键词： Optomechanics

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DEVELOPMENT OF AN ION FIGURING SYSTEM FOR CENTIMETER SCALE optical-COMPONENTS 4

DEVELOPMENT OF AN ION FIGURING SYSTEM FOR CENTIMETER SCALE O...

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Conference on current developments in optical design and optical engineering IV

作者： FAWCETT, SC DRUEDING, TW BIFANO, TG NASA GEORGE C MARSHALL SPACE FLIGHT CTROPT FABRICAT BRANCHHUNTSVILLEAL 35812

ISBN: (纸本)0819415871

An important step in the fabrication of an optical component involves the imparting of a precise contour on the optic, which can be expensive and time consuming. Ion beam figuring is the imparting of a contour on an optical component by removing material through the impingement of a broad beam of accelerated neutral particles, and provides a highly deterministic method for the final precision figuring (or correcting) of optical components with advantages over conventional methods. The high predictability allows the possibility of single step figuring, resulting in significant time and cost savings. And unlike grinding, polishing and lapping, ion figuring is non-contacting and so avoids several problems including: edge roll off effects, tool wear, and loading of the work piece. It has previously been demonstrated that ion figuring is effective for the correcting of large optical components. These implementations typically use the process for final figure correction on meter class optical components. The work discussed here is the development of the Precision Ion Machining System (PIMS) at NASA's Marshall Space Flight Center, designed for the processing of smaller (less than 10 cm diameter) optics. Initial experiments using a Kaufman type ion source to figure 8 cm diameter fused silica and silicon carbide samples were successful. Experiments involved correcting flat samples and imparting spherical and aspherical contours.

关键词： Ions optical components Silica Silicon carbide Error analysis Spherical lenses Ion beams Surface roughness Particles Polishing

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Refractive indices of Liquids in the infrared spectral region 4

Refractive indices of Liquids in the infrared spectral regio...

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current developments in optical design and optical engineering IV 1994

作者： Petrova, Maria V. Plyukhin, Andrei G. Tolstoy, Michael N. Robb, Paul Sigler, Robert D. Leary, David F. Vavilov State Optical Institute St.-Petersburg Russia Lockheed Palo Alto Research Laboratory Palo AltoCA94304-1191 United States

Liquids have not found widespread application in optical design for a number of reasons, one of which is the fact that index of refraction data for liquids is available for only very few compounds, and the data that do exist are only in the visible spectral region. In this paper we report on the results of our joint project for measuring the refractive index of liquids in the infrared (IR) spectral region. A number of liquids have transmission passbands that extend well into the IR, to wavelengths of 10 μm and beyond. Many of these liquids also have abnormal dispersion and are suitable for low-cost apochromatic lens designs in the infrared. Using these materials, design options that significantly reduce the cost and weight of IR imaging systems become available. These measurements have been made at the Vavilov State optical Institute, Saint Petersburg, Russia, in collaboration with the Lockheed Palo Alto Research Laboratory. © 1994 SPIE. All rights reserved.

关键词： Dispersion (waves)

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TOLERANCE ANALYSIS VS IMAGE QUALITY - A CASE-STUDY FOR COST-EFFECTIVE SPACE OPTICS 4

TOLERANCE ANALYSIS VS IMAGE QUALITY - A CASE-STUDY FOR COST-...

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Conference on current developments in optical design and optical engineering IV

作者： AHMAD, A FENG, C SAREPAKA, RV UNIV ALABAMA CTR APPL OPTHUNTSVILLEAL 35899

ISBN: (纸本)0819415871

The ultimate goal of optical instrumentation is to achieve the desired image quality in a given application. This requires a homogenous blend of optical and mechanical design, fabrication, system integration and testing tasks. The space optical systems generally require near theoretical performances in hostile environments within size, weight and cost constraints. Hence a careful tolerance analysis plays a crucial role in these systems. For space optics, the importance of image quality, cost and related tolerance analysis cannot be over-emphasized. In this paper, we have tried to address the challenge of achieving an optimum image quality through a cost effective tolerance analysis. Two different space optical systems are considered: the UV imager for the International Solar Terrestrial Physics (ISTP) Mission and an afocal telescope for the Advanced Polarized IR Imaging Sensor (APIRIS). These systems are described along with their required performances and designs, with an explanation of the tolerance study conducted. The effect of tolerances on the image quality and cost are investigated. © 1994 SPIE. All rights reserved.

关键词： optical INSTRUMENTATION SPACE OPTICS TOLERANCE ANALYSIS IMAGE QUALITY SPOT DIAGRAMS COST ANALYSIS

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optical design of a two-mirror asymmetrical reshaping system and its application in superbroadband color center lasers 4

Optical design of a two-mirror asymmetrical reshaping system...

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current developments in optical design and optical engineering IV 1994

作者： Oliker, Vladimir Prussner, Laird D. Shealy, David L. Mirov, Sergey Emory University Department of Mathematics and Computer Science AtlantaGA30322 United States Matis Inc. 120 Parkwood Lane DecaturGA30030 United States Matis Inc. 120 Parkwood Land DecaturGA30030 United States University of Alabama at Birmingham Department of Physics 1300 University Boulevard BirminghamAL35294-1170 United States

A two-mirror asymmetrical system has been designed to reshape a laser beam into an elliptic uniform beam profile for use in a new superbroadband color center laser system. The surface points of the two mirrors are obtained by solving a second order partial differential equation of the Monge-Ampere type which is based on conservation of energy and the law of reflection. The technique is illustrated by presenting the design of a two-mirror system which converts a circular Gaussian beam into an elliptic beam with a uniform profile. Such a reshaper system is planned for use in the development of superbroadband or control generation spectrum color center lasers, which have a significant potential for optical communications, signal multiplexing, and information coding as well as laser spectroscopy, photochemistry, medicine, color microscopy, and holography. © 1994 SPIE. All rights reserved.

关键词： Gaussian beams

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SUBARU PROJECT - current STATUS 5

SUBARU PROJECT - CURRENT STATUS

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Conference on Advanced Technology optical Telescopes V

作者： KAIFU, N NATL ASTRON OBSERV MITAKATOKYO 181JAPAN

ISBN: (纸本)0819414948

The concepts and current status of Japanese 8.2 m optical and IR telescope project, SUBARU, are summarized. SUBARU aims to achieve imaging with very high resolution of 0.2 - 0.1 arc sec, and high observing capability through the wide wavelength region of optical and near-IR. The construction of SUBARU has started in 1991. So far the 8.3 m mirror blank was successfully formed, the construction of the lower fixed part of the enclosure is almost finished, and the main parts of the telescope are being fabricated. The first light of SUBARU is scheduled to be 1998 spring.

关键词： Mirrors Telescopes Spectrographs Actuators Device simulation optical instrument design Prototyping Astronomical imaging Astronomy Observatories

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TEXAS-MEXICO MULTIMODAL TRANSPORTATION - developments IN MEXICO

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

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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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Agile manufacturing concept

Agile manufacturing concept

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Coupling Technology to Natl. Need

作者： Goldman, Steven L. Lehigh Univ. (United States)

ISBN: (纸本)0819413879

The initial conceptualization of agile manufacturing was the result of a 1991 study - chaired by Lehigh Professor Roger N. Nagel and California-based entrepreneur Rick Dove, President of Paradigm Shifts, International - of what it would take for U.S. industry to regain global manufacturing competitiveness by the early twenty-first century. This industry-led study, reviewed by senior management at over 100 companies before its release, concluded that incremental improvement of the current system of manufacturing would not be enough to be competitive in today's global marketplace. Computer-based information and production technologies that were becoming available to industry opened up the possibility of an altogether new system of manufacturing, one that would be characterized by a distinctive integration of people and technologies;of management and labor;of customers, producers, suppliers, and society.

关键词： Manufacturing Product engineering Control systems design for manufacturability Information fusion Intellectual property Computing systems Information security Information technology Reliability

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"Conventional" underwater camera systems-an update

"Conventional" underwater camera systems-an update

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OCEANS

作者： D.J. Stewart Simrad Osprey Limited Aberdeen UK

Despite the emerging developments of exotic laser-based visual imaging systems for underwater use, there is still a significant place for "conventional" camera and lighting systems. This paper seeks to review this fairly mature conventional technology, by examining the trends in the underlying technologies which determine its continuing place in oceanic science and engineering. Specific existing sensors are reviewed, together with sensor developments, in order to establish a useful end-user perspective on current sensor choices. Some prospects for future developments are also presented for consideration by those involved in more advanced programmes.< >

关键词： Cameras Charge coupled devices Sensor phenomena and characterization Marine technology Monitoring Inspection Signal resolution Lighting Laser theory optical design

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current developments in optical design and optical engineering III

Current Developments in Optical Design and Optical Engineeri...

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current developments in optical design and optical engineering III

The proceedings contains 44 papers. Some of the specific topics discussed are: multiple-temperature lens design optimization;engineering an agile beam director for laser radar;beam design of a noncooperative interfero... 详细信息

ISBN: (纸本)081941249X

关键词： optical systems

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