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HVD
The document discusses holographic versatile discs (HVDs), a type of optical disc storage technology. HVDs use holography to store data in a photopolymer layer, allowing storage capacities over 3.9 terabytes. Data is written to the disc using a green laser beam and read using interference between a reference beam and the stored holograms. While offering vastly higher storage than technologies like CDs, DVDs, and Blu-ray discs, HVDs also have drawbacks like complex optical systems and high production costs that have prevented widespread adoption.
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HVD
- 1. Seminar OnSeminar On HOLOGRAPHICVERSATILEHOLOGRAPHIC VERSATILE DISC(HVD)DISC(HVD) Presented By:Presented By: Rajdeep BanerjeeRajdeep Banerjee Roll no. -10103061018Roll no. -10103061018 Bibhash Chandra SadashivBibhash Chandra Sadashiv Roll no. -10103061019Roll no. -10103061019 B. Tech -3B. Tech -3rdrd YearYear
- 2. IntroductionIntroduction What is Holography?Whatis Holography? A Historical LookA Historical Look Year: 1963Year: 1963 Name: Pieter J. van HeerdenName: Pieter J. van Heerden Location: PolaroidLocation: Polaroid
- 3. Basics of HolographicMemoryBasics of Holographic Memory Spatial light modulatorSpatial light modulator Reference Beam Reference Beam Storage materialStorage material Information Beam Information Beam Detector ArrayDetector Array (CCD)(CCD) LightLight InterferenceInterference
- 4. 17251725 18461846 19501950 19631963 19691969 19561956 The Future?The Future? RevolutionRevolution PunchcardsPunch cards Punched tapePunched tape Magnetic tapeMagnetic tape Compact CassetteCompact Cassette The floppy diskThe floppy disk The hard driveThe hard drive
- 5. Holographic Versatile Disc(HVD)Holographic Versatile Disc (HVD) StructureStructure 1. Green writing/reading laser (532 nm)1. Green writing/reading laser (532 nm) 2. Red positioning/addressing laser (650 nm)2. Red positioning/addressing laser (650 nm) 3. Hologram (data)3. Hologram (data) 4. Polycarbon layer4. Polycarbon layer 5. Photo polymeric layer (data-containing layer)5. Photo polymeric layer (data-containing layer) 6. Distance layers6. Distance layers 7. Dichroic layer (reflecting green light)7. Dichroic layer (reflecting green light) 8. Aluminium reflective layer (reflecting red light)8. Aluminium reflective layer (reflecting red light) 9. Transparent base9. Transparent base P. PITP. PIT
- 6. TechnologyTechnology Storage Capaciry:Storage Capaciry:3.9 terabytes3.9 terabytes Transfer rate:Transfer rate: 1 Gbit/s1 Gbit/s Speed:Speed: 60,000 bits per pulse60,000 bits per pulse Information Beam:Information Beam: Green laserGreen laser Output Power:Output Power: 1 watt1 watt CD/DVDCD/DVD HVDHVD
- 7. HVD System: WritingDataHVD System: Writing Data Blue or green laser (532-nmBlue or green laser (532-nm wavelength in the testwavelength in the test system)system) Beam splitter/mergerBeam splitter/merger MirrorsMirrors Spatial light modulator (SLM)Spatial light modulator (SLM) CMOS sensorCMOS sensor Photopolymer recordingPhotopolymer recording mediummedium
- 8. HVD System: ReadingDataHVD System: Reading Data
- 9. How HVD ComparesHowHVD Compares 5,500 times the capacity of a CD-ROM5,500 times the capacity of a CD-ROM 830 times the capacity of a DVD830 times the capacity of a DVD 160 times the capacity of single-layer Blu-ray Discs160 times the capacity of single-layer Blu-ray Discs 4 times the capacity of the largest computer hard drives as of 20074 times the capacity of the largest computer hard drives as of 2007 Blu-rayBlu-ray HD-DVDHD-DVD HVDHVD Initial cost forInitial cost for recordable discrecordable disc Initial cost forInitial cost for recorder/playerrecorder/player Initial storageInitial storage capacitycapacity Read/writeRead/write speedspeed Approx. $18Approx. $18 Approx. $2,000Approx. $2,000 54 GB54 GB 36.5 Mbps36.5 Mbps Approx. $10Approx. $10 Approx. $2,000Approx. $2,000 30 GB30 GB 36.5 Mbps36.5 Mbps Approx. $120Approx. $120 Approx. $3,000Approx. $3,000 300 GB300 GB 1 Gbps1 Gbps
- 10. AdvantagesAdvantagesAdvantagesAdvantages InconveniencesInconveniences Each ofthe hologramsEach of the holograms pages containingpages containing approximately a million bitsapproximately a million bits 1 Gb/s, 60,000 bits/pulse to1 Gb/s, 60,000 bits/pulse to the writingthe writing 3.9 terabytes (TB) of3.9 terabytes (TB) of informationinformation Reference beam and theReference beam and the information beam intoinformation beam into the recording medium onthe recording medium on different axisdifferent axis Highly complex opticalHighly complex optical systemssystems Very CostlyVery Costly Cost & AvailabilityCost & Availability Drives cost:Drives cost: $15,000 (Roughly)$15,000 (Roughly) Media cost:Media cost: $120 to $180 per disc (Roughly)$120 to $180 per disc (Roughly) Lifetime:Lifetime: 50 years (Roughly)50 years (Roughly) Storage:Storage: Between 100GB and 1TB of dataBetween 100GB and 1TB of data Speed:Speed: 1G bit per second1G bit per second Company:Company: Optware, Maxell along with InPhaseOptware, Maxell along with InPhase
- 11. Newest Launch!!Newest Launch!! HolographicVersatile CardHolographic Versatile Card Storage Capacity:Storage Capacity: 30GB30GB Write Speed:Write Speed: 3 times faster than Blu Ray3 times faster than Blu Ray Cards Cost:Cards Cost: $1 each$1 each Drives Cost:Drives Cost: $2,000 each$2,000 each Maker:Maker: OptwareOptware
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- 13. ThankThank YouYou ReferencesReferences Wikipedia –the freeEncyclopedia http://en.wikipedia.org/wiki/Holographic_Versatile_ Disc Howstuffworks http://electronics.howstuffworks.com/hvd.htm Gizmocafe http://www.gizmocafe.com/tv-video/hvd.aspx Eweek http://www.eweek.com/article2/0,1759,1759907,0 0.asp Wikispace http://lis3353.wikispaces.com/Holographic+Versati le+Disc+(HVD) Images takes from www.google.co.in