Holographic Storage FIGURE 3. MH1OO is the first commercially available holographic memory product.FIGURE 4. Different hardware approaches to data storage are classified with http://silver.neep.wisc.edu/~lakes/hoStorage.html
Extractions: Scanned, filtered by optical character recognition. For further details please see the original article. This resource is intended for engineering students. Science Center, Thousand Oaks, CA 91360. DEMETRI PSALTIS is professor of electrical engineering and executive officer of Computational and Neural Systems at the California Institute of Technology, Pasadena, CA 91125. JOHN H. HONG is manager of optical information processing at Rockwell Wlth three-dimensional recording and parallel data readout, holographic memories can outperform existing optical storage techniques. In its basic form, a hologram is the photographic record of the spatial interference pattern created by the mixing of two coherent laser beams. One of the beams usually carries spatial information and is labeled the "object" beam. The other is distinguished by its particular direction of travel and is labeled the "reference" beam. Illuminating the recorded hologram with the reference beam will yield or reconstruct the object beam and vice versa. As the holographic material becomes thicker, the reconstruction becomes very sensitive to the particular angle of incidence of the reference beam, which allows multiple objects to be recorded in the same volume and accessed independently by using an appropriate set of associated reference beams. Such holograms would be recorded sequentially, each object beam illuminating the holographic material simultaneously with its unique reference beam.
Howstuffworks "How Holographic Memory Will Work" The storageSpecific Search Engine - a techtarget.com Community whatis.com searchstorage.com Definitions - holographic storage professionals. holographic storage is computer storage that uses Prototypes of holographic storage devices can store http://www.howstuffworks.com/holographic-memory.htm
Extractions: Devices that use light to store and read data have been the backbone of data storage for nearly two decades. Compact discs revolutionized data storage in the early 1980s, allowing multi-megabytes of data to be stored on a disc that has a diameter of a mere 12 centimeters and a thickness of about 1.2 millimeters. In 1997, an improved version of the CD, called a digital versatile disc (DVD), was released, which enabled the storage of full-length movies on a single disc. CDs and DVDs are the primary data storage methods for music, software, personal computing and video. A CD can hold 783 megabytes of data, which is equivalent to about one hour and 15 minutes of music, but Sony has plans to release a 1.3-gigabyte (GB) high-capacity CD. A double-sided, double-layer DVD can hold 15.9 GB of data, which is about eight hours of movies. These conventional storage mediums meet today's storage needs, but storage technologies have to evolve to keep pace with increasing consumer demand. CDs, DVDs and magnetic storage all store
Holographic Data Storage LUCENT TECHNOLOGIES ON Tuesday revealed its commitment to multilayer storage technology with the formation of a new company called InPhase Technologies. http://www.research.ibm.com/journal/rd/443/ashley.html
Extractions: Directions in information technology HTML PDF ASCII This article: HTML PDF ASCII by J. Ashley , M.-P. Bernal , G. W. Burr , H. Coufal , H. Guenther , J. A. Hoffnagle , C. M. Jefferson , B. Marcus , R. M. Macfarlane , R. M. Shelby , and G. T. Sincerbox We present an overview of our research effort on volume holographic digital data storage. Innovations, developments, and new insights gained in the design and operation of working storage platforms, novel optical components and techniques, data coding and signal processing algorithms, systems tradeoffs, materials testing and tradeoffs, and photon-gated storage materials are summarized. With its omnipresent computers, all connected via the Internet, the Information Age has led to an explosion of information available to users. The decreasing cost of storing data, and the increasing storage capacities of the same small device footprint, have been key enablers of this revolution. While current storage needs are being met, storage technologies must continue to improve in order to keep pace with the rapidly increasing demand. However, both magnetic and conventional optical data storage technologies, where individual bits are stored as distinct magnetic or optical changes on the
BYTE.com goal of a practical storage density of 10 GB per cubic cm, but it's sufficient topursue the development of holographic Data storage System (HDSS) hardware. http://www.byte.com/art/9604/sec7/art2.htm
Extractions: Text only April 1996 Cover Story When Silicon Hits Its Limits, What's Next? / Creating Holographic Storage A research team at IBM's Almaden Research Center has built a precision Photorefractive Information Storage Materials (PRISM) test stand for evaluating photosensitive samples. It also illustrates the fundamental components of a holographic storage system, as shown in the figure The device first splits a blue-green argon laser beam into separate reference and object beams. The object beam, which carries the data, gets expanded so that it fully illuminates a spatial light modulator (SLM). An SLM is simply an LCD panel that displays a page of raw binary data as an array of clear or dark pixels. The object beam finally interacts with the reference beam inside a photosensitive crystal. The ensuing interference patternthe substance of the hologramgets stored as a web of varying optical characteristics inside this crystal. To read out the data, the reference beam again illuminates the crystal. The stored interference pattern diffracts the reference beam's light so that it reconstructs the checkerboard image of the light or dark pixels. The image is directed upon a charge-coupled device (CCD) sensor array, and it instantly captures the entire digital page.
Extractions: Special: CREATE YOUR OWN SUCCESS STORY WITH REAL-TIME BUSINESS INTELLIGENCE Search all sites www.itworld.com security.itworld.com smallbusiness.itworld.com wireless.itworld.com Title Can storage vendors stay ahead of growing demand? Type Feature Source InfoWorld Summary The explosion of e-business data is putting the crunch on enterprise storage; capacities are quickly becoming exhausted under the attempt to manage the information glut. But developing technologies are sure to enable businesses to better meet maturing storage needs. continue Advertisement On this topic Storage Solutions. Sign up Now! ITworld.com Today. Sign up Now! ITworld.com Product Spotlight. Sign up Now! Examine the shifting ground of storage management and collaring runaway administration costs ... Script: SAN audio primer
InPhase Moves To Holographic Storage IN THE PIONEERING spirit of alternative storage ideas that have come before it, InPhase Technologies next month will demonstrate a holographic storage system at the National Association of Broadcasters trade show in Las Vegas. SEARCH Home // News // Article. InPhase moves to holographic storage. By Dan Neel PCtip 04/02 Aktuell. hardware und Software (S. 08-15) http://www.idg.net/english/crd_holographic_838141.html
ITworld.com - Lucent Launches Holographic Storage Venture 3 D Volume holographic Data storage nanoTechnology Concepts change/MO DVD), Tape Drives, AFM/ATF and Hard Drives for " ALL IN ONE " complete system hardware storage requirements. http://www.itworld.com/Comp/3743/IW010131hnlucent/pfindex.html
Extractions: LUCENT TECHNOLOGIES ON Tuesday revealed its commitment to multilayer storage technology with the formation of a new company called InPhase Technologies. InPhase Technologies will continue development of Lucent's holographic storage technology. Instead of recording data on the surface of a disk, the technology will enable the recording of data through the entire thickness of the storage medium, which should allow for greater storage capacity, officials said. Developed by Lucent's research arm, Bell Laboratories, the technology also stores data in what officials called page format, which can be accessed one million bits at a time for faster data retrieval. Lucent officials have not set a date for the first holographic storage products to arrive. Storing information on more than one layer of a disk is far from a new idea. In November 1999, C3D, based in New York, introduced its Fluorescent Multilayered Disk, a storage disk with as many as 50 fluorescent layers designed to hold nearly 10GB of data. The C3D technology that discriminates between the different fluorescent layers to read and write data is still in development.
EE Times - Holographic Storage Nears Debut During that time, hardware advances carried out independent of holographyhave made holographic storage more achievable. These include http://www.eetimes.com/story/OEG20010423S0113
Extractions: or more than 20 years researchers worldwide have pursued the Holy Grail of holographic data storage, an optical method of storing massive amounts of data in small areas by writing data as light patterns in three dimensions on a filmlike medium. During that time, hardware advances carried out independent of holography have made holographic storage more achievable. These include such improvements as CMOS sensor technology, development of spatial light modulators using ferroelectric liquid crystals and mirror arrays, and reduction in the cost and size of shorter wavelength green lasers. Yet the biggest challenge has been to find the right material for the recording medium, one that works and is inexpensive enough to produce commercially. In the last year, some research groups at universities, corporations, government labs and startups claimed to have found the material that will propel the technology forward and enable its adoption in commercial storage media products in two to three years.
Holographic Storage The Outlook for holographic storage by Eric Elias holographic methods have the potential to store a huge amount of information in a crystal the size of a sugar cube. HDSS proposes to develop hardware technologies for practical holographic datastorage systems and to integrate these http://www.sric-bi.com/BIP/DLSS/DLS2038.shtml
Extractions: by Eric Elias Hard-Disk Drives: A Moving Target Other Technical Problems Worth Noting Holographic methods have the potential to store a huge amount of information in a crystal the size of a sugar cube. Proponents claim that holographic storage could find applications in satellite communications, airborne reconnaissance, high-speed digital libraries, rugged storage for tactical vehicles, and image processing for medical, video, and military purposes. Despite the tantalizing promise of this approach and the validity of such applications, this study concludes that serious questions exist concerning the price and performance characteristics of this technology. In addition, the ongoing progress occurring in magnetic hard-disk drive technology will limit holography to niche markets at best. Besides criticizing some of the wilder claims of holographic proponents, this study provides a specific example of the challenges faced by an emerging technology attempting to unseat an established player. Interest in holographic storage has increased recently because of cost reductions in supporting components and recent government sponsorship. The U.S. Defense Advanced Research Projects Agency (DARPA) recently launched two complementary programs: the Holographic Data Storage Systems (HDSS) consortium and the Photorefractive Information Storage Materials (PRISM) program. PRISM began in late 1994 with the hope of developing better materials and highlighting trade-offs between mutually exclusive performance parameters. HDSS proposes to develop hardware technologies for practical holographic data-storage systems and to integrate these technologies into working demonstration systems. The programs share many of the same participants, including IBM, GTE, and Rockwell.
Vnunet.com Storage Enters The Third Dimension for example, has been working on an Advanced holographic Memory system that especiallyas power demands from more and more storage and hardware threaten to http://storage.vnunet.com/Analysis/1118253
Extractions: Select here vnunet.com home Site map News centre Products centre Downloads centre Advice centre Careers Centre Ebusiness Security Business hardware Business software Communications Personal computing Gaming Business centre Eshopper Forums Competitions Hot topics Analysis Mole Last 7 days news Search archive Registration Tools Newsletters vnunet Wap Edition vnunet Pocket Edition Readers to the Rescue forum Compare prices Research library Accountancy Age Computeractive Computing Computer Reseller News Financial Director Infomatics IT Week Management Consultancy Personal Computer World PC Magazine Webactive What PC VNU advertiser information Magazine subscriptions AccountancyAge.com IT lists IT directories Learned Information Europe Ltd vnu one to one Contacts vnumedia.co.uk Privacy statement Business hardware Storage Analysis Storage enters the third dimension Rene Millman To many, holograms are either those silver pictures of William Shakespeare on your credit card or something off Star Trek. But the technology may finally move out of the realms of sci-fi novelty and into storage. The demand for storage in the enterprise is increasing rapidly, as is the need for cheaper technology with more capacity. Until now, improvements made in magnetic storage technologies have met the mounting requirements, but some experts are suggesting that holographic storage could provide a cheaper solution.
Pioneers Promise To Pack More Data Into Smaller Spaces - Of practical use to businesses, holographic storage promises faster This processincreases the storage capacity of The hardware technology maintains read and http://www.computerworld.com/itresources/rcstory/1,4167,STO64634_KEY77,00.html
Extractions: var clickTitle = "Techworthy.com - Holographic Storage"; Many of us may be familiar with holograms only as the little images on our credit cards, or from movies in which characters use holograms to communicate with each other across great distances. (If youre a Star Wars fan, think of Darth Vaders messages from the Emperor.) Some day, however, we may find ourselves using holograms for data storage instead of using CDs or magnetic disk drives. The technology, which has been researched for decades, is not yet ready for the consumer market, but there are experts working to change that. In holographic storage, pages of data (each of which might contain thousands or millions of bits) are stored in the form of an optical interference pattern within a photosensitive crystal or polymer material. Two laser beams are used to write the pages into the materialan object or signal beam and a reference beam. The object beam is imprinted with the page of data to be stored when the beam passes through or is reflected off of a liquid-crystal-like screen known as a spatial-light modulator (SLM). The pages of data are stored and retrieved as two-dimensional imagespatterns of thousands of pixels, some clear and some opaque. Each pixel represents a single bit of information. The pattern looks somewhat like the squares of a crossword puzzle. When the object beam meets the reference beam and the two beams interfere with each other inside the photosensitive recording material, the hologram of that page of data is created.
Howstuffworks "How Holographic Memory Will Work" Main Computer hardware How holographic Memory Will Work. Desktop holographicData storage After more than 30 years of research and development, a desktop http://computer.howstuffworks.com/holographic-memory2.htm
Extractions: After more than 30 years of research and development, a desktop holographic storage system (HDSS) is close at hand. There is still some fine tuning that must be done before such a high-density storage device can be marketed, but IBM researchers have suggested that they will have a small HDSS device ready as early as 2003. These early holographic data storage devices will have capacities of 125 GB and transfer rates of about 40 MB per second. Eventually, these devices could have storage capacities of 1 TB and data rates of more than 1 GB per second fast enough to transfer an entire DVD movie in 30 seconds. So why has it taken so long to develop an HDSS, and what is there left to do?
Extractions: Subscribe Attend a CFO Conference Please select Accounting Buyer's Guides Capital Markets CFO Careers CFO Community CFO PeerMetrix E-Commerce HR and Benefits Software/Hardware Tax Tools Treasury About CFO.com About CFO Magazine CFO Conferences CFO.com Webcasts Executive Forum Please select Become a Member Login Get Newsletters Get Email Alerts Track CPE Credits Sitemap LOGIN/REGISTER NEED-TO-KNOW TECH document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); You are here: Home Software and Hardware Need-to-Know Tech : Article
Extractions: Subscribe Attend a CFO Conference Please select Accounting Buyer's Guides Capital Markets CFO Careers CFO Community CFO PeerMetrix E-Commerce HR and Benefits Software/Hardware Tax Tools Treasury About CFO.com About CFO Magazine CFO Conferences CFO.com Webcasts Executive Forum Please select Become a Member Login Get Newsletters Get Email Alerts Track CPE Credits Sitemap LOGIN/REGISTER Software and Hardware document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); document.write(''); You are here: Home CFO.com Site Archive Software and Hardware : Article Storing information in three dimensions, using holography, can increase capacity dramatically. Essentially, a hologram is produced when a laser reference beam interferes with another beam reflected from the object to be recorded. The pattern of interference is captured by photographic film, a light-sensitive crystal, or some other optical material. Illuminating the pattern with the reference beam reproduces a 3D image of the object.