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CONF ON current developments IN optical engineering 4

作者： YAMAGISHI, F KATO, M MAEDA, S INAGAKI, T Fujitsu Labs. Ltd. (Japan) Fujitsu Labs. Ltd. (Japan)

ISBN: (纸本)0819403954

A new method for correcting comatic aberration in holographic optical systems which uses constant optical path(COP) has been developed. The sum of the optical path lengths from an object wavefront to an image wavefront remains constant, and achromatic holographic systems can be easily calculated. Using COP, a new focusing triplet was designed with wavelength tolerance of 9 nm for entrance and exit numerical apertures of 0.5. This is 15 times larger than that for conventional single holographic lens.

关键词： Holography Chromatic aberrations Holograms Diffraction Lens design Spatial frequencies Wavefronts Tolerancing optical engineering Laser optics

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design CONSIDERATION OF CHINESE LONG BASE-LINE STELLAR INTERFEROMETER

DESIGN CONSIDERATION OF CHINESE LONG BASE-LINE STELLAR INTER...

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CONF ON current developments IN optical engineering 4

作者： ZHAO, PQ ZHOU, BF Acad Sinica Research Cent for Astronomical Instruments Nanjing China

ISBN: (纸本)0819403954

Many fundamental astronomical problems need much higher resolution than is afforded by atmospheric visibility or the diffraction limit of even the largest telescope being planned. The only way to meet these demands is by a distributed array of telescopes similar to those used in radio astronomy, or the long baseline stellar interferometry. China is planning to build a small-aperture long- baseline stellar optical interferometer for three purposes. One purpose is to clear up some problems before building a large and expensive interferometer. The second is to measure angular diameters of stars and angular distances between double stars. The third is to modify it for astrometry use in the future. In this paper, the design tolerance and specifications of the interferometer are discussed based on the astronomical requirements.

关键词： Interferometers

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design AND FABRICATION OF HIGH DAMAGE THRESHOLD TURNING MIRRORS FOR THE NOVA LASER

DESIGN AND FABRICATION OF HIGH DAMAGE THRESHOLD TURNING MIRR...

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CONF ON current developments IN optical engineering 4

作者： WOLFE, CR KOZLOWSKI, MR MARCHI, FT RAINER, F ENEMARK, E Lawrence Livermore National Lab. (United States) Optical Coating Lab. Inc. (United States)

ISBN: (纸本)0819403954

Laser induced damage to optical components severely limits the operating fluence of high peak power lasers used for fusion research such as the Nova laser at the Lawrence Livermore National Laboratory. In particular, surfaces and optical thin films often damage at a lower fluence than bulk materials in large aperture, high quality optics. We have designed and are fabricating new 94 cm turning mirrors for Nova as part of the "Precision Nova" program to improve beam quality. A new design has been optimized for updated optical performance specifications including increased damage resistance. The new mirror design will operate at all turning angles required by the ten Nova beamlines. This flexibility reduces mirror inventory and fabrication cost. A process of "conditioning" the mirror coating has been developed that is permanent and increases the damage threshold by as much as a factor of 2-3x.

关键词： Mirrors Laser damage threshold Coating Reflectivity Raster graphics Thin films optical engineering Laser induced damage Multilayers Objectives

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developments IN CRTS FOR HMD APPLICATIONS

DEVELOPMENTS IN CRTS FOR HMD APPLICATIONS

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CONF ON HELMET-MOUNTED DISPLAYS 2

作者： LEYLAND, JD WALTERS, F ETHERINGTON, DG Rank Brimar Ltd. (United Kingdom)

ISBN: (纸本)0819403415

The developtent of three hi4i resolution miniature cRT 's for the He1ut ?'bunted Display Alication is described with reference to the detailed construction. The design considerations for such tubes are discuss1 with reference to the trade offs in terms of display perfonrnce arxI physical parareters . current state of the art arxi future performance potential is indicated.

关键词： Head-mounted displays Particles CRTs Raster graphics Fourier transforms Fiber optics Electron beams Luminous efficiency Manufacturing Packaging

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FABRY-PEROT TUNABLE FILTER FOR THE VISIBLE AND NEAR IR USING NEMATIC LIQUID-CRYSTALS

FABRY-PEROT TUNABLE FILTER FOR THE VISIBLE AND NEAR IR USING...

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CONF ON current developments IN optical engineering 4

作者： BONACCINI, D CASINI, L STEFANINI, P Osservatorio Astrofisico di Ar (Germany) Osservatorio Astrofisico di Arcetri (Italy) Osservatorio Astrofisico di Ar (Italy)

ISBN: (纸本)0819403954

A nematic liquid crystal Fabry-Perot interferometer (NLC-FPI) based on nematic material in a parallel configuration is described, for applications in astronomy. This device allows spectral chopping for an efficient removal of background radiation, when the source is embedded in a strong background such as the solar corona or IR sources. The primary design is intended for two-dimensional spectroscopic imaging. This method is also very useful for precision spectropolarimetry. The NLC-FPI is a tunable, double-channel filtec we present some theoretical and experimental results obtained on a first generation pmtotype.

关键词： Fabry–Perot interferometers Refractive index Liquid crystals Prototyping optical engineering Molecules Reflectivity Crystals Polarization Tunable filters

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design OF SHACK-HARTMANN PLATE WITH GRIN ROD LENSES

DESIGN OF SHACK-HARTMANN PLATE WITH GRIN ROD LENSES

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CONF ON current developments IN optical engineering 4

作者： ZHAO, PQ ZHOU, BF Acad Sinica Research Cent for Astronomical Instruments Nanjing China

ISBN: (纸本)0819403954

The Shack-Hartmann (S-N) wavefront sensor, which is derived from the classical Hartmann testing method, is one of the most convenient methods available for the optimal testing of telescopes on site on natural stars. It also has many applications in adaptive optics, active optics and CAM of optical mirror. The principle of the method is explained. Light from the tested source and from a reference source is collimated by a lens and incides upon an S-H plate which is a lens array. Each lenslet forms two point images. The distance between each pair of images reflects the angular aberration of the tested wavefront over the subaperture. A method of producing S-N plates with GRIN rod lenses is described. The experimental S-H plate has 10x10 GRIN rod lenses.

关键词： Image Sensors

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current developments in optical engineering IV

Current Developments in Optical Engineering IV

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current developments in optical engineering IV

The Proceedings of the Conference contains 27 papers representing the very latest developments in the optical and optical engineering subject areas not covered in the other conferences at the annual San Diego meeting. This Proceedings includes papers on basic optical design and engineering, e.g. the optomechanical laboratory hardware, its organization, terminology and devices;a precision dual positioning system;a Wollaston polarizer in imaging systems;a 20-element long focal length zoom lens;photolithographic lenses;a reflection microcirculation microscope. The session on optical fabrication and testing includes papers on computer simulation of interferometer performance;adaptive optics wavefront corrector using addressable liquid crystal retarders;microlens array manufacture;design of Shack-Hartmann plate with GRIN rod lenses;Chinese adaptive astronomical telescope. The session on waveguide and diffractive optics and microlithography comprises papers on the fabrication of ion-exchanged glass channel waveguides with etched and diffused grating taps;modular fiber optic assembly technique;forward photorefractive multibeam mixing in BaTiO3;correcting chromatic aberration in holographic optical systems. Miscellaneous topics include articles on optomechanical properties of PMMA and their applications in pressure sensors and on a Fabry-Perot tunable filter for visible and near IR using nematic liquid crystals.

关键词： optical Systems

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Deep space optical communications. A program update

Deep space optical communications. A program update

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Free-Space Laser Communication Technologies ii

作者： Lesh, James R. California Inst of Technology United States

ISBN: (纸本)0819402591

An update of the activities in the development of deep-space optical communications technology and systems design is described. The motivations for such a capability are presented in light of the new national priorities on planetary space exploration. A program to autonomously collect data on the joint visibility function of the atmosphere is described, followed by several of the newer technology developments. Two systems level demonstrations, one with the Galileo spacecraft and another originally proposed for the Cassini mission are then presented. The overall long range plan for deep-space optical communication development is also discussed.

关键词： optical Communication

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Deep water. ASIC design in the real world

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IEE Review 1990年第7期36卷 263-265页

作者： James, M.A. Dowty Maritime Systems Ltd United Kingdom

Early developments of electronic command and control systems for the British Navy are reported. They started with mechanical designs leading to the most modern logic and computer circuitry. Emphasis in the discussion is on Complex ASICs (application-specific integrated circuit). The design of two devices: a GIO (general input-output) controller, and a DRAM controller is considered.

关键词： Computer architecture fibre-optic token ring Microprocessors and microcomputers marine systems distributed-multiprocessor architecture optical communication Multibus ii backplane application specific integrated circuits multiprocessing systems token networks digital control array processing Multiprocessing systems Computer communications transputers submarine control systems ASIC design intercomputer communication Local area networks Dowty command and control systems Control engineering computing optical links Marine system control

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INTEGRATION OF design AND INSPECTION

INTEGRATION OF DESIGN AND INSPECTION

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CONF ON INDUSTRIAL INSPECTION 2

作者： SIMMONDS, WH Sira Ltd. (United Kingdom)

ISBN: (纸本)0819403121

developments in advanced computer integrated manufacturing technology, coupled with the emphasis on Total Quality Management, are exposing needs for new techniques to integrate all functions from design through to support of the delivered product. One critical functional area that must be integrated into design is that embracing the measurement, inspection and test activities necessary for validation of the delivered product. This area is being tackled by a collaborative project supported by the UK Government Department of Trade and Industry. The project is aimed at developing techniques for analysing validation needs and for planning validation methods. Within the project an experimental Computer Aided Validation Expert system (CAVE) is being constructed. This operates with a generalised model of the validation process and helps with all design stages: specification of product requirements; analysis of the assurance provided by a proposed design and method of manufacture; development of the inspection and test strategy; and analysis of feedback data. The kernel of the system is a knowledge base containing knowledge of the manufacturing process capabilities and of the available inspection and test facilities. The CAVE system is being integrated into a real life advanced computer integrated manufacturing facility for demonstration and evaluation.

关键词： Inspection Manufacturing Computer aided design Computing systems Integration Product engineering design for manufacturability Tolerancing Data modeling System integration

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