A basic introduction to 'Holographic Versatile Disc' (HVD). HVD is considered as a fouth-generation optical disc. It allows for a storage of about 1 TB with a data transfer rate of 1 GB/sec.

1. Nitin Balakrishnan
08103046
HOLOGRAPHIC VERSATILE DISC
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Guided by :-
Sivananaintha Perumal P.
11/29/2011

2. Outline
• Introduction
• What is HVD?
• Basics of Holographic memory
• Technology used in HVD
• Structure of HVD
• Writing data
• Reading data
• Advantages, disadvantages and applications of HVD
• Facts
• FutureAspects
• Conclusion
• Reference
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3. Introduction
 HVD is an advanced optical disk that‟s presently in the
development stage.
 Storage capacity :- 1 terabyte (TB).
 Data transfer rate :- 1 Gigabit per second.
 The technology permits over 10 kilobits of data to be written
and read in parallel with a single flash.
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4. Introduction
 An HVD would be a successor to today‟s Blu-ray and HD-
DVD technologies.
 Advancements in the technology were made, in the early 21st
century.
 Developed by the„Holography Storage Development
Forum‟
 HVD can store up to 60 times the data of a regular DVD and
it can read and write data 10 times faster as well.
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5. What is HVD ?
 Definition:- Holographic versatile disc is a holographic
storage format that looks like a DVD but is capable of storing
far more data.
 Prototype HVD devices have been created with a capacity of
3.9 terabytes (TB) and a transfer rate of 1 Gbps.
 1 HVD = 5,500 CD-ROMs = 830 DVDs = 160 Blu-ray
discs
 Uses laser beams to store data in 3D.
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6. What is HVD ?
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7. Basics of Holographic Memory
 Holography is a method of recording patterns of light to
produce a 3D object.
 The recorded patterns of light are called a hologram.
 Creation of a hologram begins with a focused beam of light, a
laser.
 Laser splits up into 2 :-
 Reference beam
 Information beam
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8. Basics of Holographic Memory
 When light encounters an image its composition changes.
 When the information beam encounters an image, it carries
that image in its waveforms.
 When the two beams intersect, it creates a pattern of light
interference and that can be recorded on the photosensitive
polymer layer of a disc.
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9. Basics of Holographic Memory
 To retrieve the information stored in a hologram, shine the
reference beam onto the hologram.When it reflects off the
hologram, it holds the light pattern of the image stored
there.
 This reconstruction beam is then send to a CMOS sensor to
recreate the original image.
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10. Technology used in HVD
 Collinear holography –The laser beams are collimated.
 Blue-green laser reads the data encoded in the form of laser
interference.
 Red laser serves the purpose of reference beam and to read the
servo info.
 A layer of dichroic mirrors, between the holographic and servo
data layer reflects back the blue-green laser beam, letting only the
red laser pass through it to reach the servo information.
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11. Technology used in HVD
 The concepts of collinear holographic memories are:
 To increase the recording capacity, thick volume-recording
media is used
 The optical disk is pre-formatted with addresses and optical
servo information
 The beam for the optical servo is utilized to provide
backward compatibility with the existing CDs or DVDs
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12. Structure of HVD
 The HolographicVersatile Disc structure consists of the
following components:
 Green writing/reading laser (532 nm)
 Red positioning/addressing laser (650 nm)
 Hologram (data)
 Polycarbon layer
 Photopolymeric layer (data-containing layer)
 Distance layers
 Dichroic layer (reflecting green light)
 Aluminum reflective layer (reflecting red light)
 Transparent base
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13. Structure of HVD
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14. Writing data
 A simplified HVD system consists of the following main
components:
 Blue or green laser (532-nm wavelength in the test system)
 Beam splitter/merger
 Mirrors
 Spatial light modulator (SLM)
 CMOS sensor
 Photopolymer recording medium
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15. Writing data
 Information is encoded into binary and is stored in the SLM.
 These data are turned into ones and zeroes represented as opaque or
translucent areas on a„page‟.
 When the information beam passes through the SLM, portions of the
light are blocked by the opaque areas of the page, and portions pass
through the translucent areas.
 When the reference beam and the information beam rejoin on the same
axis, they create a pattern of light interference - the holography data.
 This interference pattern is stored in the photopolymer area of the disc
as a hologram.
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16. Writing data
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17. Writing data
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Page Data Hologram

18. Reading data
 To read, we‟ve to retrieve the light pattern stored in the
hologram.
 Laser is projected onto the hologram – a light beam that is
identical to the reference beam .
 The hologram diffracts this beam according to the specific pattern
of light interference its storing.
 The resulting light recreates the image of the page data that
established the light-interference pattern – Reconstruction beam.
 The reconstruction beam - bounces back off the disc, it travels to
the CMOS sensor.
 The CMOS sensor then reproduces the page data.
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19. Reading data
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20. Advantages, disadvantages and
applications of HVD
 Advantages :-
 More storage
 Reads and writes quickly
 Price, expected to be slashed down
 Disadvantages :-
 Initial price of the player and disc are high.
 Price and storage not confirmed, still in R&D.
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21. Advantages, disadvantages and
applications of HVD
 Applications:-
 Used for storing large amounts of data most likely for
large companies.
 Could be the most efficient way to backup
information in the near future.
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22. Facts
 It has been estimated that the books in the U.S. Library of
Congress, the largest library in the world , could be stored on six
HVDs.
 The pictures of every landmass on Earth - like the ones shown in
Google Earth - can be stored on two HVDs.
 With MPEG4 ASP encoding, a HVD can hold anywhere between
4,600-11,900 hours of video, which is enough for non-stop
playing for a year.
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23. Future aspects
 Have tremendous implications in the commercial, industrial
and d-Cinema realms.
 Will find wide use for backing up and archiving the media
libraries, including the one at the Hollywood studios
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24. Conclusion
 Materialized with the evolution of the collinear holography
technology
 Stores far more data than, what a DVD can.
 Prototype HVD has a capacity of 3.9TB and a transfer rate of
1 Gbps.
 Hence, 1 HVD = 830 DVDs = 160 Blu-Ray discs
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25. Reference
 [1]. Hideyoshi Horimai andY.Aoki,“Holographic versatile disc(HVD) System”
 [2]. Optical data storageTopical Meeting 2006, 2006page(s):6-8.
 [3.] Hideyoshi Horimai and XiaodiTan,“Holographic Information Storage System:
 [4]. Today and Future,”Magnetics,IEEETransactions onVolume 43/Issue2,part 2 feb2007,
page(s):943-947.
 [5]. G. Deepika, “Holographic versatile disc”
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5738819&isnumber=57
38811
 [6]. http://electronics.howstuffworks.com/hvd.htm
 [7]. http://electronics.howstuffworks.com/hvd1.htm
 [8]. http://electronics.howstuffworks.com/hvd2.htm
 [9]. http://electronics.howstuffworks.com/hvd3.htm
 [10]. http://electronics.howstuffworks.com/hvd4.htm
 [11]. http://electronics.howstuffworks.com/hvd5.htm
 [12]. http://en.wikipedia.org/wiki/Holographic_Versatile_Disc
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27. THANK YOU !!
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