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Proceedings of the 1999 Ultraviolet and X-Ray Detection, Spectroscopy, and Polarimetry iiI

作者： Gardner, L. Kohl, J. Cranmer, S. Fineschi, S. Golub, L. Raymond, J. Smith, P.L. Strachan, L. Howard, R. Moses, D. Socker, D. Wang, D. Fisher, R.R. Davila, J. Cyr, C.St. Harvard-Smithsonian Cent for Astrophysics Cambridge United States

The Advanced Solar Coronal Explorer (ASCE) is one of five missions selected for a Phase A Concept Study in the current round of proposed MIDEX missions. ASCE's instrument complement is supported by a SPARTAN 400 reusable carrier. The spacecraft is carried into orbit and deployed by the Space Shuttle;at mission's end, nominally 2 years later, it is retrieved and returned to earth for post-flight calibration. ASCE comprises two instrument modules, the Spectroscopic and Polarimetric Coronagraph (SPC) and the Extreme Ultraviolet Imager (EUVI). The external occulter for the coronagraph is supported on a boom, which is extended 10 meters beyond the instrument apertures once the spacecraft is on station. Large aperture optics can therefore be used, and this, in combination with improvements in optical and photon detection efficiencies, will provide spectroscopy of the extended solar corona with unprecedented sensitivity and spatial resolution, routine measurements of the electron temperature, and polarimetry of the H I Lyman lines. SPC also extends the short wavelength limit to 28 nm. As a consequence, SPC will be able to perform the first He ii 30.4 nm and He I 58.4 nm spectroscopy of the extended corona. In the visible part of the spectrum (450-600 nm), SPC's Large Aperture Spectroscopic Coronagraph (LASCO) channel will provide polarimetric images with 1.8 arc second resolution elements, which will allow the determination of polarized brightness of the coronal plasma. In a separate parallel channel LASCO will also provide images at single minor ion line wavelengths from which can be determined the shapes and Doppler shifts of those lines. The distant external occulter provides for major improvement in stray light suppression. The EUVI instrument will take high cadence images of the full disk and low corona at four selectable wavelengths with 0.9 arc second resolution elements. A description of the instrument design and performance capabilities is presented.

关键词： optical instruments

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High speed optical shutter coupled to fast readout CCD camera

High speed optical shutter coupled to fast readout CCD camer...

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Proceedings of the 1999 Sensors, Cameras, and Systems for Scientific/Industrial Applications

作者： Yates, George J. Pena, Claudine R. McDonald Jr., Thomas E. Gallegos, Robert A. Numkena, Dustin Turko, Bojan T. Ziska, George Millaud, Jacques Diaz, Rick Buckley, John Anthony, Glen Araki, Takae Larson, Eric Los Alamos Natl Lab United States

A high frame rate optically shuttered CCD camera for radiometric imaging of transient optical phenomena has been designed and several prototypes fabricated, which are now in evaluation phase. The camera design incorporates stripline geometry image intensifiers for ultra fast image shutters capable of 200ps exposures. The intensifiers are fiber optically coupled to a multiport CCD capable of 75MHz pixel clocking to achieve 4KHz frame rate for 512 × 512 pixels from simultaneous readout of 16 individual segments of the CCD array. The intensifier, Philips XX1412MH/EO3, is generically a Generation ii proximity-focused micro channel plate intensifier (MCPii) redesigned for high speed gating by Los Alamos National Laboratory and manufactured by Philips Components. The CCD is a Reticon HS0512J split storage with bi-directional vertical readout architecture. The camera mainframe is designed utilizing a multilayer motherboard for transporting CCD video signals and clocks via imbedded stripline buses designed for 100MHz operation. The MCPii gate duration and gain variables are controlled and measured in real time and up-dated for data logging each frame, with 10-bit resolution, selectable either locally or by computer. The camera provides both analog and 10-bit digital video. The camera's architecture, salient design characteristics, and current test data depicting resolution, dynamic range, shutter sequences, and image reconstruction will be presented and discussed.

关键词： High speed cameras

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Advanced optical sensor performance in transmission and distribution applications

Proceedings of the IEEE Power Engineering Society Transmissi...

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Proceedings of the IEEE Power engineering Society Transmission and Distribution Conference 1999年 1卷 259-265页

作者： Cruden, A. Michie, W.C. Niewczas, P. Madden, W.I. McDonald, J.R. Andonovic, I. Univ of Strathclyde Glasgow United Kingdom

This paper reports on recent developments within research into optical fibre based voltage and current measurement equipment for metering and protection applications. Several parameters (thermal variations, intensity fluctuations due to mechanical disturbance, electronic noise) are known to influence the performance of these sensors and this paper summarises an analysis of the effect of such disturbances providing design criteria for the realisation of protection and metering class OCTs. Laboratory trials have shown that the compensation schemes devised reduce vibration errors by 20 to 30 dB and compensate for temperature induced drift to better than 0.1%. Extended engineering evaluation field trials of both OCT and OVT devices within a three phase 132 kV installation have been undertaken over the past two years. Details of these trials are presented to provide an appreciation of the potential difficulties which may be encountered and the benefits which may be derived.

关键词： optical sensors

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Advanced optical sensor performance in transmission and distribution applications

Advanced optical sensor performance in transmission and dist...

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IEEE PES Transmission and Distribution Conference and Exposition

作者： A. Cruden W.C. Michie P. Niewczas W.I. Madden J.R. McDonald I. Andonovic Rolls-Royce University Technology Centre in Power Eng. University of Strathclyde Glasgow UK Optoelectronic Division Department of Electrical Eng. University of Strathclyde UK

This paper reports on recent developments within research into optical fibre based voltage and current measurement equipment for metering and protection applications. Several parameters (thermal variations, intensity fluctuations due to mechanical disturbance, electronic noise) are known to influence the performance of these sensors and this paper summarises an analysis of the effect of such disturbances providing design criteria for the realisation of protection and metering class OCTs. Laboratory trials have shown that the compensation schemes devised reduce vibration errors by 20 to 30 dB and compensate for temperature induced drift to better than 0.1%. Extended engineering evaluation field trials of both OCT and OVT devices within a three-phase 132 kV installation have been undertaken over the past two years. Details of these trials are presented to provide an appreciation of the potential difficulties which may be encountered and the benefits which may be derived.

关键词： optical sensors Protection optical fibers Voltage current measurement Fluctuations optical noise Mechanical sensors Thermal sensors Performance analysis

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New developments in mid-infrared Sb-based lasers

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Journal De Physique. IV : JP 1999年第2期9卷 Pr2-79-Pr2-96页

作者： Joullié, A. Ctr. Electronique M. UMR 5507 du CNRS Sciences et Techniques du Laguedoc Case 067 37095 Montpellier Cedex 05 France

A number of different approaches are being investigated to obtain high-performance mid-infrared (2-5 μm) diode lasers for applications such as infrared lidar, remote sensing and environmental monitoring. They include laser heterostructures based on interband transitions in quantum-well or superlattice active region, and quantum cascade structures based on unipolar intersubband transitions. The Sb-containing structures, employing GaSb, InAs, AlSb and related alloys, are focusing actually much attention. Significant improvements in the molecular beam epitaxy of these alloys make possible now the growth of laser antimonide structures of high structural quality. Excellent performances have been reported at ≈ 2 μm from GaInAsSb/AlGaAsSb and at ≈ 3.5 μm from InAsSb/InAlAsSb type-I quantum-well diode lasers. Type-ii (staggered alignment) GaInAsSb/GaSb and type-iiI (broken gap alignment) InAs/Ga(In)Sb strained multiquantum-well lasers are promising material systems for mid-infrared sources, due to their large conduction and valence band offsets, the potential of Auger process suppression and the enhancement of the electron-hole optical coupling by wave function engineering. Besides high performance interband quantum cascade lasers operating at room temperature with negligible current leakage and high output power can be designed from Sb-containing type-iiI structures.

关键词： Quantum well lasers

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Experimental investigation of ion beam transport in a laser initiated high current discharge channel

Experimental investigation of ion beam transport in a laser ...

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IEEE International Conference on Plasma Science (ICOPS)

作者： A. Tauschwitz C. Niemann D. Penache R. Presura Gesellschaft fur Schwerionenforschung mbH Darmstadt Germany

Summary form only given. The transport of space charge dominated ion beams is of interest to many applications using high power particle beams. The most challenging demands are found in the field of ion beam driven inertial confinement fusion. Motivated by this application the space charge and current neutralized beam focusing and transport in gas discharge plasmas has been under investigation for a number of years. Paralleled by engineering design work of a modified HILIFE ii reactor with discharge channel based final beam transport, and by experimental investigations of laser initiated high current discharges at the Lawrence Berkeley National Laboratory (LBNL) the ion optical properties of such a channel will be studied for the first time with a heavy ion beam at GSI.

关键词： Ion beams Space charge Particle beams Laser beams Particle beam optics Laser fusion Inertial confinement Discharges Plasma applications Plasma confinement

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current developments in optical design and engineering Vii

Current developments in optical design and engineering VII

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current developments in optical design and engineering Vii

The proceedings contains 41 papers from the conference on current developments in optical design and engineering Vii. The topics discussed include: laser beams;spherical aberrations;bar code scanners;zoom lenses;mirror telescopes;linear detector arrays;streak cameras;laser projection displays;video color mixers;optomechanical design;aspherical mirrors;x-ray optics system;optical resins;high-power lasers;birefringence;light reflection;finite element method and mumerical simulation.

关键词： optical design

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Erratum: current developments in optical design and enginneering Vii (Proceeding of SPIE - The International Society for optical engineering)

Proceedings of SPIE - The International Society for Optical ...

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Proceedings of SPIE - The International Society for optical engineering 1998年 3429卷 312-312页

作者： Fisher, Robert E. Germann, Lawrence M. Hatheway, Alson E. McConnell, Malaehy Smith, Warren J.

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Recent developments and applications in electronic speckle pattern interferometry

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JOURNAL OF STRAIN ANALYSIS FOR engineering design 1998年第2期33卷 153-169页

作者： Petzing, JN Tyrer, JR Univ Loughborough Dept Mech Engn Loughborough Leics England

Electronic speckle pattern interferometry (ESPI) is a wholefield non-contact optical metrology technique for displacement measurement, based on the optical physics of surface-generated laser speckle. Since its inception during the early 1970s ESPI has gradually evolved into different optical designs and has been applied to a range of engineering and non-engineering applications. Development of ESPI has continued during the 1990s with the introduction of new laser and optical technology into the interferometers, allowing further optimization and extending the potential applicability of the technique. This review considers the most notable developments of interferometer design and application that have occurred and been widely published during the 1990s, and examines the current and near-future direction of research into the technique.

关键词： speckle interferometry ESPI static dynamic transient wholefield

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design of a reflective/diffractive hybrid optical system

Design of a reflective/diffractive hybrid optical system

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Conference on current developments in optical design and engineering Vii

作者： Shen, MZ Guo, YH Lu, ZK Chinese Acad Sci Inst Opt & Elect Chengdu 610209 Peoples R China

In this paper we describe the design of a reflective / diffractive hybrid optical system, which features no obscuration, re-imagining system with 100% cold shield efficiency, 4 degrees of field of view, near diffracti... 详细信息

ISBN: (纸本)0819428841

关键词： infrared optical systems optical design hybrid optical system

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