The document discusses the Holographic Versatile Disc (HVD), an advanced optical disc format capable of storing far more data than Blu-ray discs. An HVD can hold up to 1 terabyte of data using holographic techniques to store information in three dimensions. Prototype HVDs have achieved storage capacities of 3.9 terabytes and transfer rates of 1 gigabit per second. HVDs store data using interference patterns created by splitting a laser beam into reference and information beams, allowing over 10 kilobits of data to be written and read in parallel. When read, the reference beam reconstructs the original image from the stored hologram. HVDs have the potential to revolution

1. VISAKH SIVAN
ELECTRONICS & COMMUNICATION DEPT
COCHIN UNIVERCITY COLLEGE OF ENGINEERING
HOLOGRAPHIC VERSATILE DISC
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2. 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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3. 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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4. 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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5. WHAT IS HVD ?
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6. 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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7. 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.
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8. STRUCTURE OF HVD
• The Holographic Versatile Disc structure consists of
the following components:
 Green writing/reading laser
 Red positioning/addressing laser
 Hologram (data)
 Polycarbon layer
 Photopolymeric layer (data-containing layer)
 Distance layers
 Dichroic layer (reflecting green light)
 Aluminum reflective layer (reflecting red light)
 Transparent base 8

9. 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 9

10. WRITING DATA
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11. 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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12. READING DATA
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13. 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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14. LIMITATIONS
• The medium may cause shrinkage and expansion
due to photopolymerization during the recording
process temperature changes .
• This lead to the distortion of holograms.
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15. WAVEFRONT COMPENSATION
• Hologram distortion was optically compensated for by
controlling the wavefront of the laser beam.
• A phase-SLM is inserted into the optical path of the
reference beam.
• Generates an appropriate wavefront of the beam that
matches hologram distortion.
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16. WAVEFRONT COMPENSATION
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17. RESULT OF WAVEFRONT COMPENSATION
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18. ADVANTAGES, DISADVANTAGES
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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19. 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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20. 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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21. 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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22. 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 3.9 TB and a
transfer rate of 1 Gbps.
• Hence, 1 HVD = 830 DVDs = 160 Blu-Ray discs.
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23. REFERENCE
• [1]. Hideyoshi Horimai and Y.Aoki, “Holographic versatile disc(HVD) System”
• [2]. Optical data storage Topical Meeting 2006, 2006page(s):6-8.
• [3.] Hideyoshi Horimai and Xiaodi Tan,“Holographic Information Storage
System:
• [4]. Today and Future,” Magnetics,IEEETransactions on Volume 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&isnu
mber=5738811
• [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://en.wikipedia.org/wiki/Holographic_Versatile_Disc
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24. THANK YOU !!
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