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检索条件"任意字段=Conference on Advances in Optical Data Storage Technology"

共 5096 条记录，以下是4391-4400 订阅

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ULTRA-HIGH DENSITY optical data storage

ULTRA-HIGH DENSITY OPTICAL DATA STORAGE

引用

Symposium on Electro-Optics: Present and Future, SEO 1998

作者： Shahriar, M.S. Wong, L. Bock, M. Ham, B. Hemmer, P.R. Massachusetts Institute of Technology CambridgeMA02139 United States Air Force Research Laboratory Hanscom MA01731 United States

ISBN: (纸本)155752548X

We have developed a novel, polymer-based material suitable for shrinkage-free thick holography. It can be produced in arbitrary shapes and sizes, with optical quality surfaces and very low scattering noise. A combination of spatial and angular multiplexing in this material can be used to produce a holographic CD-ROM with a storage capacity of one terabyte in the near future. We have demonstrated storage and recall of 1920 frames of a video in a small sample of this material. The storage capacity of holography can be enhanced further by adding spectral multiplexing. In a crystal of Pr:YSO, we have demonstrated spectral multiplexing in two frequency dimensions, at temperatures greater than 10 K. This approach will enable us to achieve a storage capacity exceeding a petabit per cubic cm, using commercially available lasers and closed-cycle cryostats. © 1998 optical Society of America.

关键词： Holography

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Energy-delay efficient data storage and transfer architectures: circuit technology versus design methodology solutions

Energy-delay efficient data storage and transfer architectur...

引用

Design, Automation and Test in Europe conference (DATE98)

作者： Catthoor, F IMEC Louvain Belgium

ISBN: (纸本)0818683597

Both in custom and programmable instruction-set processors for data-dominated multi-media applications, many of the architecture components are intended to solve the data transfer and storage issues. Recent experiments at several locations have clearly demonstrated that due to this fact, the main power (and largely also area) cost is situated in the memory units and the communication hardware. In this paper the main reasons for this problem will be reviewed and a perspective will be provided on the expected near-future evolution. It will be shown that the circuit and process technology advances have been very significant in the past decade. Still, these are not sufficient to fully solve this power and area bottle-neck which has been created in the same period. Therefore, also several possible design methodology remedies will be proposed for this critical design issue, with emphasis on effective system-level memory management methodologies. These promise very large savings on energy-delay also on area for multi-media applications, while still meeting the real-time constraints.

关键词： data transfer

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Novel type of red sensitive photo-polymer system for optical storage

Novel type of red sensitive photo-polymer system for optical...

引用

Proceedings of the 1998 conference on Advanced optical Memories and Interfaces to Computer storage

作者： Zhao, Feng Frietman, E.E.E. Li, Xiaou Delft Univ of Technology Delft Netherlands

In this paper, a novel type of red sensitive photo-polymer system for optical storage, here called RSPP, is presented. First of all, the components in RSPP, for example, photo-sensitizer, photo-initiator, monomer, copolymer, combiner, stabilizer, hardener, and fabrication and processing technique of RSPP are given. Then, the absorption spectrum of RSPP material is measured. And the result shows the material is only sensitive to read light, whose absorption peak is at 662 nm and half-width of the absorption is about 100 nm. After that, the property of exposure in RSPP is studied. It is found that RSPP holographic plate has several advantages over the optical storage (holographic optical storage) material previously reported. First, This RSPP is fit to record both transmission holograms and reflection holograms. Second, the holograms recorded in RSPP plate can be processed both in dry and in wet processes due to its strong real-time effect. The performance parameters of the ESPP are following: (a). The photosensitivity is about 2 mJ/cm2 at 630 nm;(b). the resolution of the material is more than 4000 pp/mm;(c). the saturation refractive index modulation is 0.0034 and 0.0141 for real time and wet processing respectively. In the study of the exposure in RSPP holographic plate, some other phenomena concerning real time effect in RSPP, such as, light-amplification and modulation of single light beam effect, are found. The mechanism of these phenomena is discussed.

关键词： optical data storage

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Rapid digital elevation data capture using airborne scanning lasers: Recent projects in the USA, Europe and South Africa

Rapid digital elevation data capture using airborne scanning...

引用

conference on advances in Laser Remote Sensing for Terrestrial and Hydrographic Applications

作者： Fong, AY Gutelius, B Carswell, D Optech Toronto ON M3J 2Z9 Canada

ISBN: (纸本)0819428310

In recent years, the use of airborne scanning laser technology has been rapidly increasing. Many governmental as well as private organizations around the world are evaluating this nascent technology as an advanced means of digital elevation data collection. These organizations have been working in conjunction with Optech of Toronto, Canada to conduct demonstrations and experiments as part of a rigorous examination of the capabilities and accuracy of Optech's Airborne Laser Terrain Mapper (ALTM). This paper will present examples of recent projects conducted in the United States, Europe and South Africa dong with a brief description of the fundamental concepts inherent to the technology and its operation in different environmental settings. In certain circumstances where traditional survey techniques such as aerial photogrammetry or standard terrestrial methods are impractical or impossible, often an airborne scanning laser survey is more economical and productive. Also, since no ambient light is required, airborne scanning laser systems can operate day or night. Some of the areas in which the use of this technology may be more beneficial include: forest floor mapping, power wire detection, corridor or route surveys, large topographic surveys and mining. An additional application of airborne scanning laser devices is in the measurement of power line proximity to vegetation. Among the varied applications of airborne scanning lasers, forested areas are of particular interest because they are problematic for companies employing traditional remote sensing methods. Unlike photogrammetry, scanning lasers systems can actually penetrate the forest canopy and accurately measure the terrain and objects below.

关键词： airborne laser scanning terrain mapping

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Micro Drive - a pluggable one-inch disk drive for portable devices

Micro Drive - a pluggable one-inch disk drive for portable d...

引用

Proceedings of the 1998 7th Biennial IEEE International Nonvolatile Memory technology conference (INVMTC)

作者： Reiley, T.C. Albrecht, T.R. Kuroki, K. Albrecht, D.W. Aoyagi, M. IBM-Almaden Research Cent San Jose United States

A small hard disk drive for portable or hand-held applications is described, which is the result of the confluence of several technological trends. First, the individual technologies which underlie magnetic areal storage density are being improved at a rate which allows a 60% per year increase in data storage in a given area. As this rate continues, it becomes much more favorable to decrease the size of a magnetic disk drive. Second, there is currently a major growth stage in the range and complexity of portable information/communication devices. The function (and ubiquity) of these devices is expanding rapidly through advances in miniaturization, power reduction and expanding communications infrastructure. Third, the general storage needs are also expanding, and are being driven particularly by the need to capture, transmit and storage images. A prototype disk drive, called a Micro Drive, has been developed for this general market. Details of the design and components of the disk drive, which is compatible with the new Compact Flash CF Type II standard, will be given. The device applications and functional performance issues will also be addressed.

关键词： Hard disk storage

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Heuristic Determination of Spatial Resolution from Viewpoint of data Fitting in Transmission optical Computed Tomography Based on Coherent Detection Imaging

Heuristic Determination of Spatial Resolution from Viewpoint...

引用

advances in optical Imaging and Photon Migration, AOIPM 1998

作者： Yuasa, Tetsuya Devaraj, Balasigamani Watanabe, Yuuki Akatsuka, Takao Inaba, Humio Yamagata University 4-3-16 Jonan Yamagata Yonezawa992 Japan Biophotonics Information Laboratories 2-2-1 Matsuei Yamagata990 Japan Tohoku Institute of Technology 35-1 Yagiyama-Kasumicho Miyagi Sendai982 Japan

ISBN: (纸本)1557525463

A new evaluation method for analysis of the spatial resolution of the coherent detection imaging (CDI) system is proposed with a new formulation of the computed tomography based on the algebraic equation system. The spatial resolution is defined as the optimal square grid size in the sense of data-fitting in the algebraic reconstruction, and is determined with the minimum description length (MDL) principle devised by Rissanen. Our method can simultaneously consider the effects brought about by the numbers of projections and bins, the beam width, the observation noise, the truncated projections, and so on. Moreover, a method to generate the weight matrix faithfully representing data-acquisition processes by the Gaussian beams is proposed to consider the profile of the incident beams. We demonstrate the effectiveness with simulated data. © 1998 optical Society of America.

关键词： Algebra

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Magnetic recording technology-advances through the year 2000 and beyond

Magnetic recording technology-advances through the year 2000...

引用

Proceedings of the 1998 7th Biennial IEEE International Nonvolatile Memory technology conference (INVMTC)

作者： Grochowski, E. Fontana Jr., R.E. IBM San Jose United States

Magnetic hard disk drives have become the dominant storage technology for information processing and have been applied in such diverse applications as servers for large enterprise computers to desktop and mobile personal computers. This product has been the recipient of significant technology innovations as magnetoresistive sensors, advanced thin film disks and high performance PRML data channels. The result has been areal density increases at 60% per year and commensurate price per megabyte reductions. The industry average drive capacity is 4 gigabytes for the year 1998. To maintain this rapid progress throughout the next decade, giant magnetoresistive sensors and supersmooth thin film disks are being employed. The effects of superparamagnetism will be addressed by innovations considered evolutionary in this technology progress.

关键词： Magnetic recording

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Experimental study on the combinative action of zinc chloride and triethanolamine on improving photosensitivity in red-sensitized dichromated gelatin for optical storage

Experimental study on the combinative action of zinc chlorid...

引用

Proceedings of the 1998 conference on Advanced optical Memories and Interfaces to Computer storage

作者： Zhao, Feng Frietman, E.E.E. Geng, Wanzheng Delft Univ of Technology Delft Netherlands

An experimental study to ascertain the combinative action of zinc chloride and triethanolamine (TEA) on improving photosensitivity of red-sensitized dichromated gelatin (RSDCG) has been carried out. Firstly, the exposure properties of home-made RSDCG were studied experimentally. Then, zinc chloride, a kind of Louis' acid, was added into the RSDCG to observe its catalytic effect on photo-cross-linking of gelatin molecules in RSDCG. After that, TEA, as a kind of external electron donor in RSDCG photo-chemical reaction, was introduced into RSDCG to make its photosensitivity higher in this study. Finally, the combinative effect of zinc chloride and TEA on the photosensitivity in RSDCG holograms was studied. The results show: (1). zinc chloride and TEA have obvious combinative effect on improving the photosensitivity of RSDCG. (2). the curve of diffraction efficiency of RSDCG holographic transmission grating vs exposure energy is bell-shaped. (3). the maximum diffraction efficiency of the grating can reach as high as 83% corresponding to the exposure energy about 200 mJ/cm2.

关键词： optical data storage

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Improved simulation of photoresists using new development models

Improved simulation of photoresists using new development mo...

引用

15th Annual SPIE conference on advances in Resist technology and Processing

作者： Dammel, RR Sagan, JP Kokinda, E Eilbeck, N Mack, CA Arthur, GG Henderson, CL Scheer, SA Rathsack, BM Willson, CG Clariant Corp AZ Elect Mat Gardena CA 90247 USA

ISBN: (纸本)0819427780

A new development rate model is proposed which is based on an equation derived by Huang, Reiser and Kwei for the concentration dependence of the dissolution rate of acidic resins in aqueous alkaline developers. This equation predicts cessation of development at a critical concentration c*. Experiments in which the developer strength was varied show that the critical concentration c* is a linear function of the normalized sensitizer concentration m of positive-tone resists. The model is shown to reproduce the R(m) curves of conventional photoresists well, but it does not fully the unusual drop in the development rate curves at comparatively low relative sensitizer concentrations of m = 0.4 to 0.7 shown by highperformance resist systems. This physical phenomenon can be related to a selective dissolution effect in which the lower molecular weight component of the two-component resins typically used in these resists is leached out of the surface areas. The onset of this phenomenon leads to a sudden lowering of the resist dissolution rate which is described by the introduction of a "notch function."

关键词： Photoresist developing data modeling Photoresist materials Radon Affine motion model Autoregressive models Diffusion Chlorine Standards development Picture Archiving and Communication System

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Dynamically refreshable optical fiber loop memory

Dynamically refreshable optical fiber loop memory

引用

Proceedings of the 1998 International conference on Applications of Photonic technology, ICAPT

作者： Chai, Y. Chen, J.H. Zhao, X.J. Zhang, J.P. Fan, J.Y. Choa, F.S. Lin, W. Univ of Maryland Baltimore County Baltimore United States

An optical fiber loop memory can be used in a packet switched optical network to resolve the contention problems and increase the system flexibility. We report a multi-wavelength optical fiber loop memory with in-loop waveguide grating router (WGR). Bit error rate of stored packets is analyzed both experimentally and theoretically. A new refreshable multi-wavelength loop memory configuration is proposed and experimentally demonstrated. With this refreshable optical memory, which works like a DRAM (dynamic random access memory), optical signal can be stored as long as system required.

关键词： optical data storage

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