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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720631583
Category :
Languages : en
Pages : 90
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Book Description
Biochrome photosensitive films in particular Bacteriorhodopsin exhibit features which make these materials an attractive recording medium for optical data storage and processing. Bacteriorhodopsin films find numerous applications in a wide range of optical data processing applications; however the short-term memory characteristics of BR limits their applications for holographic data storage. The life-time of the BR can be extended using cryogenic temperatures [1], although this method makes the system overly complicated and unstable. Longer life-times can be provided in one modification of BR - the "blue" membrane BR [2], however currently available films are characterized by both low diffraction efficiency and difficulties in providing photoreversible recording. In addition, as a dynamic recording material, the BR requires different wavelengths for recording and reconstructing of optical data in order to prevent the information erasure during its readout. This fact also put constraints on a BR-based Optical Memory, due to information loss in holographic memory systems employing the two-lambda technique for reading-writing thick multiplexed holograms.Mehrl, David J. and Krile, Thomas F.Ames Research CenterCRYOGENIC TEMPERATURE; HOLOGRAPHY; DATA STORAGE; OPTICAL DATA PROCESSING; OPTICAL MEMORY (DATA STORAGE); BACTERIA; MULTIPLEXING; PHOTORECEPTORS; LOSSES; DIFFRACTION
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720631583
Category :
Languages : en
Pages : 90
Get Book Here
Book Description
Biochrome photosensitive films in particular Bacteriorhodopsin exhibit features which make these materials an attractive recording medium for optical data storage and processing. Bacteriorhodopsin films find numerous applications in a wide range of optical data processing applications; however the short-term memory characteristics of BR limits their applications for holographic data storage. The life-time of the BR can be extended using cryogenic temperatures [1], although this method makes the system overly complicated and unstable. Longer life-times can be provided in one modification of BR - the "blue" membrane BR [2], however currently available films are characterized by both low diffraction efficiency and difficulties in providing photoreversible recording. In addition, as a dynamic recording material, the BR requires different wavelengths for recording and reconstructing of optical data in order to prevent the information erasure during its readout. This fact also put constraints on a BR-based Optical Memory, due to information loss in holographic memory systems employing the two-lambda technique for reading-writing thick multiplexed holograms.Mehrl, David J. and Krile, Thomas F.Ames Research CenterCRYOGENIC TEMPERATURE; HOLOGRAPHY; DATA STORAGE; OPTICAL DATA PROCESSING; OPTICAL MEMORY (DATA STORAGE); BACTERIA; MULTIPLEXING; PHOTORECEPTORS; LOSSES; DIFFRACTION
Author: Hans J. Coufal
Publisher: Springer
ISBN: 3540478647
Category : Science
Languages : en
Pages : 493
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Book Description
An outstanding reference book on an exciting topic, reaching out to the 21st century's key technologies. The editors, together with leading experts in the field from both academic research and industry, bring together the latest knowledge on this technique. The book starts with an introduction on the history and fundamentals, multiplexing methods, and noise sources. The following chapters describe in detail recording media, components, channels, platforms for demonstration, and competing technologies such as classical hard disks or optical disks. More than 700 references will make this the ultimate source of information for the years to come. The book is intended for physicists, optical engineers, and executives alike.
Author: Kevin Curtis
Publisher: John Wiley & Sons
ISBN: 0470975784
Category : Science
Languages : en
Pages : 414
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Book Description
Holographic Data Storage: From Theory to Practical Systems is a primer on the design and building of a holographic data storage system covering the physics, Servo, Data Channel, Recording Materials, and optics behind holographic storage, the requirements of a functioning system, and its integration into "real-life" systems. Later chapters highlight recent developments in holographic storage which have enabled readiness for commercial implementation and discuss the general outlook for the technology, including the transition from professional to consumer markets and the possibilities for mass reproduction.
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ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Many Bacteriorhodopsin (BR) mutants were synthesized and their optical absorption properties were measured. Several of the mutants were identified that formed the so-called "Q390 state" at neutral pH, but the ultra-long storage lifetime of this state was not investigated. The double mutant D85N/V49A showed a factor of 50 increase in holographic recording sensitivity compared with the single mutant D85N, and had similar diffraction efficiency. The increased sensitivity of this mutant in the spectral range of laser diodes and its long storage lifetime makes this film a good choice for real-time holographic interferometry systems and optical data storage applications. It was demonstrated that a compact diode laser could be used to record and reconstruct holograms in thick films of the mutant D85N. It was demonstrated that lifetimes of several weeks could be achieved. Since diffusion limits the lifetime, using cross-linked BR can substantially increase it It was also demonstrated that very high data densities could be achieved using shift multiplexing with a speckle wave reference beam. With improved materials (reduced scattering, crosslinked polymer host), a 3 mm thick CD-ROM sized disk of D85N could potentially be used to store hundreds of Gbytes of information.
Author: L. Nikolova
Publisher: Cambridge University Press
ISBN: 1139477420
Category : Science
Languages : en
Pages : 249
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Book Description
Current research into holography is concerned with applications in optically storing, retrieving, and processing information. Polarization holography has many unique properties compared to conventional holography. It gives results in high efficiency, achromaticity, and special polarization properties. This books reviews the research carried out in this field over the last 15 years. The authors provide basic concepts in polarization and the propagation of light through anisotropic materials, before presenting a sound theoretical basis for polarization holography. The fabrication and characterization of azobenzene based materials, which remain the most efficient for the purpose, is described in detail. This is followed by a description of other materials that are used in polarization holography. An in-depth description of various applications, including display holography and optical storage, is given, and the book concludes with perspectives for the future. This book is an important reference for researchers.
Author: Xiaodi Tan
Publisher: John Wiley & Sons
ISBN: 3527413634
Category : Technology & Engineering
Languages : en
Pages : 293
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Book Description
Collinear Holography Provides state-of-the-art, in-depth knowledge on the principles, devices, and applications of collinear holography In the era of Big Data, traditional magnetic and optical storage technologies are unable to satisfy the growing demand for reliable, scalable, cost-effective, and energy-efficient data storage. Holographic storage, considered the most promising technology for meeting the future storage needs of the information age, adopts a three-dimensional volume storage mode with a theoretical storage density vastly greater than conventional optical disks. Collinear Holography: Devices, Materials, Data Storage is a comprehensive, up-to-date account of the volumetric recording technology that combines large storage capacities with high transfer rates and exceptional reliability in optical data storage systems. Written by pioneers in the field, this authoritative book provides detailed coverage of the key technological approaches, theories, applications, systems, devices, and components in the rapidly advancing field of holographic data storage. Explains the principles of collinear holography, its different system setups, key devices and components, and current challenges Describes the materials, data and media formats, servo controls, and read/write characteristics of collinear holography storage systems Details collinear holography in current applications such as holo-printing, correlation, and encryption Discusses futures technologies including the Holographic Versatile Disc (HVD) and the The Holographic Versatile Card (HVC) Collinear Holography: Devices, Materials, Data Storage is an indispensable resource for applied physicists, electrical engineers, and materials and information scientists in both academia and industry.
Author: Izabela Naydenova
Publisher: BoD – Books on Demand
ISBN: 9533079819
Category : Technology & Engineering
Languages : en
Pages : 400
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Book Description
Holograms - Recording Materials and Applications covers recent advances in the development of a broad range of holographic recording materials including ionic liquids in photopolymerisable materials, azo-dye containing materials, porous glass and polymer composites, amorphous chalcogenide films, Norland optical adhesive as holographic recording material and organic photochromic materials. In depth analysis of collinear holographic data storage and polychromatic reconstruction for volume holographic memory are included. Novel holographic devices, as well as application of holograms in security and signal processing are covered. Each chapter provides a comprehensive introduction to a specific topic, with a survey of developments to date.
Author: Craig Hoffman
Publisher: CRC Press
ISBN: 1351247174
Category : Science
Languages : en
Pages : 3726
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Book Description
The first edition of the Encyclopedia of Optical and Photonic Engineering provided a valuable reference concerning devices or systems that generate, transmit, measure, or detect light, and to a lesser degree, the basic interaction of light and matter. This Second Edition not only reflects the changes in optical and photonic engineering that have occurred since the first edition was published, but also: Boasts a wealth of new material, expanding the encyclopedia’s length by 25 percent Contains extensive updates, with significant revisions made throughout the text Features contributions from engineers and scientists leading the fields of optics and photonics today With the addition of a second editor, the Encyclopedia of Optical and Photonic Engineering, Second Edition offers a balanced and up-to-date look at the fundamentals of a diverse portfolio of technologies and discoveries in areas ranging from x-ray optics to photon entanglement and beyond. This edition’s release corresponds nicely with the United Nations General Assembly’s declaration of 2015 as the International Year of Light, working in tandem to raise awareness about light’s important role in the modern world. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail)
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Author:
Publisher:
ISBN:
Category : Optical storage devices
Languages : en
Pages : 266
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Book Description
Author:
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Category : Government publications
Languages : en
Pages : 892
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