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.

1. Seminar OnSeminar On
HOLOGRAPHIC VERSATILEHOLOGRAPHIC 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?What is Holography?
A Historical LookA Historical Look
Year: 1963Year: 1963
Name: Pieter J. van HeerdenName: Pieter J. van Heerden
Location: PolaroidLocation: Polaroid

3. Basics of Holographic MemoryBasics 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
Punch cardsPunch 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: Writing DataHVD 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: Reading DataHVD System: Reading Data

9. How HVD ComparesHow HVD 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 of the 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!!
Holographic Versatile 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

12. AllianceAlliance
ApplicationApplication

13. ThankThank
YouYou
ReferencesReferences
Wikipedia –the free Encyclopedia
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