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CONF ON EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY

作者： BLOCH, JJ AMEDURI, F PRIEDHORSKY, WC ROUSSELDUPRE, D SMITH, BW SIEGMUND, OHW CULLY, S WARREN, J GAINES, GA Los Alamos National Lab. (United States) Univ. of California/Berkeley (United States)

ISBN: (纸本)0819404055

The Array of Low Energy X-ray Imaging Sensors (ALEXIS) experiment consists of six wide angle EUV/ultrasoft Xray telescopes utilizing normal incidence multilayer mirrors, flown on a miniature satellite to map out the sky in three narrow bandpasses around 66, 7 1, and *** 66 and 7 1 eV bandpasses are centered on intense Fe emission lines which are characteristic of million degree plasmas such as the one thought to produce the soft X-ray background. The 95eVbandpass has a higher throughput and is more sensitive to continuum sources. The mission will be launched into orbit on the Pegasus Air Launched Vehicle in mid-1991. We will present the details of the ALEXIS telescope optical design, initial characterizations of the first flight mirrors and detectors, and the current schemes for characterizing and calibrating the completed telescope assemblies. We will also discuss the details of a novel "wavetrap" feature incorporated into the multilayer mirror structure to greatly reduce the mirror's reflectivity at 304A, a major background contamination flux of He ii emission from the geocorona.

关键词： Mirrors Sensors Telescopes Reflectivity Calibration Space telescopes X-ray telescopes Extreme ultraviolet Microchannel plates X-rays

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Tracking a head-mounted display in a room-sized environment with head-mounted cameras

Tracking a head-mounted display in a room-sized environment ...

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Helmet-Mounted Displays ii

作者： Wang, Jih-fang Azuma, Ronald Bishop, Gary Chi, Vernon Fuchs, Henry Univ of North Carolina Chapel Hill United States

ISBN: (纸本)0819403415

This paper presents our efforts to accurately track a Head-Mounted Display (HMD) in a large environment. We review our current benchtop prototype, then describe our plans for building the full-scale system. Both systems use an inside-out optical tracking scheme, where lateral-effect photodiodes mounted on the user's helmet view flashing infrared beacons placed in the environment. Church's method used the measured 2D image positions and the known 3D beacon locations to recover the 3D position and orientation of the helmet in real-time. We discuss the implementation and performance of the benchtop prototype. The full-scale system design includes ceiling panels that hold the infrared beacons and a new sensor arrangement of two photodiodes with holographic lenses. In the full-scale system, the user can walk almost anywhere under the grid of ceiling panels, making the working volume nearly as large as the room.

关键词： optical Instruments

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CALIPSO. An interactive image analysis software package for desktop PACS workstations

CALIPSO. An interactive image analysis software package for ...

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Medical Imaging IV: Image Processing

作者： Ratib, Osman Huang, H.K. Univ Hospital of Geneva Geneva Switzerland

ISBN: (纸本)081940277X

The purpose of this project is to develop a low cost workstation for quantitative analysis of multimodality images using a Macintosh ii personal computer. In the current configuration the Macintosh operates as a stand alone workstation where images are imported either from a central PACS server through a standard Ethernet network or recorded through video digitizer board. The CALIPSO software developed contains a large variety of basic image display and manipulation tools. We focused our effort, however, on the design and implementation of quantitative analysis methods that can be applied to images from different imaging modalities. Analysis modules currently implemented include geometric and densitometric volumes and ejection fraction calculation from radionuclide and cine-angiograms, Fourier analysis of cardiac wall motion, vascular stenosis measurement, color coded parametric display of regional flow distribution from dynamic coronary angiograms, automatic analysis of myocardial distribution of radiolabelled tracers from tomoscintigraphic images. Several of these analysis tools were selected because they use similar color coded and parametric display methods to communicate quantitative data extracted from the images.

关键词： Biomedical engineering

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STATUS OF OKTAVIAN-I AND PROPOSAL FOR OKTAVIAN-ii

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NUCLEAR SCIENCE AND engineering 1990年第3期106卷 249-265页

作者： SUMITA, K TAKAHASHI, A iiDA, T YAMAMOTO, J Osaka Univ Suita Japan

OKTAVIAN I was built at Osaka University and has been operated since 1981 as an intense deuterium-tritium (D-T) neutron source at 1.5-ns pulses of 103 D-T neutron/pulse or as a continuous neutron source of 3×1012... 详细信息

OKTAVIAN I was built at Osaka University and has been operated since 1981 as an intense deuterium-tritium (D-T) neutron source at 1.5-ns pulses of 10³ D-T neutron/pulse or as a continuous neutron source of 3×10¹² D-T neutron/s at maximum. This national facility has been devoted mainly to studies on fusion neutron-related subjects by university reseachers nationwide and has also served for international collaborations. Annual operating time is usually >1000 h for neutron supply with no special maintenance difficulties. OKTAVIAN consists of a high-current deutron beam accelerator with some specia provisions for maintaining a high D⁺ atomic ratio for D-T neutron production, highly effective water-cooled rotating solid Ti-T targets for continuous neutron supply, and a nanosecond intense pulse beam supply system with a small air-cooled solid Ti-T target. Special care has been taken to prevent the spread of tritrium contamination in- and outside of the facility. Many fusion neutronics experiments have been carried out for the fundamental study of D-T fusion neutron transport characteristics. They have served to improve the evaluated nuclear data files and to test the calculational methods for fusion reactor design. OKTAVIAN has been also used for neutron irradiation using continuous D-T neutrons. Several D-T neutron damage experiments have been performed for optical and electronic instruments and components for fusion engineering. The OKTAVIAN-ii project, which proposed to supply approximately 20 times more intense D-T neutrons than the present facility, is under investigation.

关键词： Neutrons

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COMPUTER INTEGRATION FOR optical FABRICATION

COMPUTER INTEGRATION FOR OPTICAL FABRICATION

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CONF ON current developments IN optical engineering AND COMMERCIAL OPTICS

作者： BARRETT, D CZAJKOWSKI, W Eastman Kodak Company (United States)

The chronological events associated with fabricating a lens system from initial design to final component manufacturing will be explored. The benefits of utilizing computer integration in design, process planning and ... 详细信息

ISBN: (纸本)0819402044

关键词： Computer aided design Manufacturing Optics manufacturing Spherical lenses optical engineering CAD systems optical fabrication Control systems Glasses Polishing

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current TRENDS IN BINARY OPTICS AT PERKIN-ELMER

CURRENT TRENDS IN BINARY OPTICS AT PERKIN-ELMER

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CONF ON current developments IN optical engineering AND COMMERCIAL OPTICS

作者： LOGUE, J MCHUGH, T Perkin-Elmer Corporation (United States)

ISBN: (纸本)0819402044

Binary optics is an emerging technology whereby light is directed, combined, or distributed by an optical material having a "stepped" phase structure. We produce computer-generated diffractive elements having high optical efficiency using multiple mask lithography. Perkin-Elmer has an active research and development program supporting binary optics activities from software development to practical technology demonstrations. Standard software tools have been developed to facilitate the design of binary optics from general optical prescriptions. These tools are used to design binary masks for the fabrication of binary optics for diverse applications ranging from simple lenses to general phase transformations. This paper briefly reviews the development of binary optics, discusses the tools supporting the design and fabrication of binary optics, and presents recent applications and demonstrations of binary optics.

关键词： Diffraction Photomasks Lenses optical alignment Aspheric lenses optical components Computer generated holography Binary data optical engineering Computer aided design

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optical design ANALYSIS INCORPORATING ACTUAL SYSTEM INTERFEROMETRIC DATA

OPTICAL DESIGN ANALYSIS INCORPORATING ACTUAL SYSTEM INTERFER...

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CONF ON current developments IN optical engineering AND COMMERCIAL OPTICS

作者： WILLEY, G PATCHIN, R CAI a Division of RECON/OPTICAL INC. (United States)

ISBN: (纸本)0819402044

Interferometric measurements of real surfaces are combined with computed optical design analyses. To accomplish this, a special software interface driver was developed to accept serial optical Path Difference (OPD) data from a Zygo Mark iiI interferometer, apply standard algorithms, and convert the measured data into a CODE V readable file. Analysis was conducted on a large aperture developmental optical system containing a fold mirror of eggcrate construction. MTF performance of the entire system was computed as were the contributions of individual surfaces to overall optical quality. Diffraction effects due to the rib structure of the eggcrate mirror were apparent in this analysis, as were the effects of gravity and figure components of the wavefront. This hybrid analysis demonstrates the usefulness of coupling interferometry with an optical design program in the analysis of complex optical systems.

关键词： Mirrors Modulation transfer functions Wavefronts Diffraction Interferometry Code v Computing systems optical engineering Data modeling Error analysis

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INCREASING NUMERICAL APERTURE OF SELFOC LENS - PHYSICAL APPROACH

INCREASING NUMERICAL APERTURE OF SELFOC LENS - PHYSICAL APPR...

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CONF ON current developments IN optical engineering AND COMMERCIAL OPTICS

作者： YAOMIN, C YUE, C SHIQIONG, Z Nanjing Fiber Glass Research and Design Intitule Nanjing 210012 China

In order to increase NA of selfoc lens, a physical approach is proposed. The paper describes theory and preparation results of this approach, which depends on reshaping the surface of general selfoe lens. © 1989 ... 详细信息

ISBN: (纸本)0819402044

关键词： optical engineering

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BINOCULAR PERFORMANCE AND design

BINOCULAR PERFORMANCE AND DESIGN

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CONF ON current developments IN optical engineering AND COMMERCIAL OPTICS

作者： VUKOBRATOVICH, D University of Arizona (United States)

ISBN: (纸本)0819402044

A binocular extends the range of human vision. Binoculars enable the user to see objects at greater distances or, alternatively, to see greater detail in distant objects. In failing light, binocul are used to detect objects that the naked eye cannot detect. Binoculars also extend the range of stereo vision of the user; this application is primarily of interest in military fire control.

关键词： Prisms Eye Target detection Objectives Stray light optical engineering Glasses Tolerancing optical alignment Refraction

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design EXAMPLES OF HYBRID REFRACTIVE-DIFFRACTIVE LENSES

DESIGN EXAMPLES OF HYBRID REFRACTIVE-DIFFRACTIVE LENSES

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CONF ON current developments IN optical engineering AND COMMERCIAL OPTICS

作者： FOO, LD CLARK, SP MERCADO, RI Lockheed Missiles and Space Company Inc. (United States)

ISBN: (纸本)0819402044

Diffractive lenses have recently become realizable elements in optical systems. However, their application to wide band optical imaging systems are limited because they are highly dispersive and exhibit unacceptable amounts of color related aberrations. In this paper we will present a design study of the achromatization of hybrid refractive-diffractive lenses over wide spectral bands. design examples of hybrid lenses which operate in the visible, mid-infrared (3 - 5 micron) and long-wave infrared (8 - 12 micron) spectral bands will be presented and a comparison with conventional lenses designed to operate in these spectral bands will be discussed.

关键词： Mirrors Lenses Monochromatic aberrations Fluctuations and noise optical components Silicon Glasses Potassium Visible radiation Infrared radiation

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