Recent advances in reversible opticalstorage materials compatible with low-cost semiconductor lasers have led to experiments on high-areal-density high-data-rate opticalstorage of digital data. The results of these ...
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Recent advances in reversible opticalstorage materials compatible with low-cost semiconductor lasers have led to experiments on high-areal-density high-data-rate opticalstorage of digital data. The results of these experiments indicate that areal-densities of 10**8 bits/in**2 (1. 6 multiplied by 10**7 bits/cm**2) and data-rates from 10-25 Mbits/sec appear feasible. This, together with an improved high-track-density beam servo scheme, allows a high-capacity (1G Byte/surface) optical file to be configured using 14 inch diameter disk technology.
Recent advances in reversible opticalstorage materials compatible with low-cost semiconductor lasers have led to experiments on high-areal-density high-data-rate opticalstorage of digital data. The results of these ...
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Recent advances in reversible opticalstorage materials compatible with low-cost semiconductor lasers have led to experiments on high-areal-density high-data-rate opticalstorage of digital data. The results of these experiments indicate that areal-densities of 10**8 bits/in**2 (1. 6 multiplied by 10**7 bits/cm**2) and data-rates from 10-25 Mbits/sec appear feasible. This, together with an improved high-track-density beam servo scheme, allows a high-capacity (1G Byte/surface) optical file to be configured using 14 inch diameter disk technology.
The new IEEE International Roadmap for Devices and Systems Mass datastorage report outlines the current technology and expected advances and applications in digital storage and nonvolatile memory technology for the f...
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The new IEEE International Roadmap for Devices and Systems Mass datastorage report outlines the current technology and expected advances and applications in digital storage and nonvolatile memory technology for the future.
The article surveys advances in storagetechnology and likely future developments. Microfloppy discs, intelligent disc drives, thin film and plated media and opticalstorage are all discussed in detail, with special a...
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The article surveys advances in storagetechnology and likely future developments. Microfloppy discs, intelligent disc drives, thin film and plated media and opticalstorage are all discussed in detail, with special attention paid to the cost/benefits promised by these new technologies.
COMPANIES DEVELOPING HOLO-graphic datastorage systems have made enormoustechnical advances toward their goal of inventing an opticaldatastorage system with far greaterstorage capacity and faster access to data than...
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COMPANIES DEVELOPING HOLO-graphic datastorage systems have made enormoustechnical advances toward their goal of inventing an opticaldatastorage system with far greaterstorage capacity and faster access to data than even blue-laser digital versatile discs(DVDs).Thefirst commercial applications,though modest,are feasible in the short *** polymercompanies,recognizing a nascent market,are keen on leveraging their expertise for the technology.
Recent advances have made opticaldata links reality and point the way toward broader optics applications in the computers of the future. Researchers have investigated both analog and digital computing devices and rep...
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Recent advances have made opticaldata links reality and point the way toward broader optics applications in the computers of the future. Researchers have investigated both analog and digital computing devices and reported wide-ranging progress, particularly in the areas of communication and secondary datastorage such as fiber links and CR ROMs. The author summarizes progress in this field.
Throughout the 30-year history of holographic storage, an enormous number of material systems have been studied for use as the recording medium. In spite of the years and effort expended, the ideal material has not be...
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Throughout the 30-year history of holographic storage, an enormous number of material systems have been studied for use as the recording medium. In spite of the years and effort expended, the ideal material has not been identified and interest in holographic storage has waned. Recently, however, advances in both organic and inorganic photorefractive materials has rekindled interest in volume holography, not only for information storage but also as a technology that may be important for optical interconnects, neural networks and optical computing. Interest is further enhanced by continuing development in some of the enabling technologies, such as CCD arrays and spatial light modulators, necessary to make a viable storage product. After a brief introduction to holographic storage, this paper will concentrate on defining the systems requirements that drive material selection and review recent advances in photorefractive materials and techniques that address key issues. Included will be a discussion of multiplexing methods as well as various means to inhibit, or at least manage, destructive writing and reading. The paper will conclude with a discussion of the remaining critical issues as a focus for continued research and development.
Magneto-optical recording disk drives have been introduced into the marketplace by several companies. This paper reviews the basic technology which makes these drives possible and then describes on-going research whic...
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Magneto-optical recording disk drives have been introduced into the marketplace by several companies. This paper reviews the basic technology which makes these drives possible and then describes on-going research which is expected to lead to future advances. New technologies such as direct overwrite recording, optical heads using laser diode arrays for parallel track readout, shorter wavelength lasers, advanced signal processing, improved modulation and error correction codes, and lightweight heads using optical fibers and/or integrated optical components are expected to lead to order of magnitude improvements in storage densities and data rates, as well as substantial improvements in access times.
During the next 5-10 years it is likely that the bit density available in digital mass storage systems (magnetic tapes, optical and magnetic disks) will be increased to such an extent that it will greatly exceed that ...
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During the next 5-10 years it is likely that the bit density available in digital mass storage systems (magnetic tapes, optical and magnetic disks) will be increased to such an extent that it will greatly exceed that of the conventional photographic emulsions like IIIaJ which are used in astronomy. These developments imply that it will soon be advantageous for astronomers to use microdensitometers to completely digitize all photographic plates soon after they are developed. Distribution of digital copies of sky surveys and the contents of plate vaults will probably become feasible within ten years. Copies of other astronomical archives (e. g. , Space Telescope) could also be distributed with the same techniques. The implications for designers of future microdensitometers are: 1) there will be a continuing need for precision digitization of large-format photographic imagery, and 2) that the need for real-time analysis of the output of microdensitometers will decrease.
This paper brings forward one concept of holographic storage of multi-level digital data at first. It is that each pixel includes more information than 1 bit, which means that a multi-level digital data image provides...
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ISBN:
(纸本)0819455989
This paper brings forward one concept of holographic storage of multi-level digital data at first. It is that each pixel includes more information than 1 bit, which means that a multi-level digital data image provides more information than a binary digital data image with the same pixels. So, the capacity will be increased with this technology Furthermore, some aspects of holographic storage of multi-level digital data, such as the multi-level coding, storage characters and the quality of the stored image are debated. Finally, we research this holographic storagetechnology by experiment.
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