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Holographic versatile disk

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The document discusses holographic versatile disks (HVDs), an advanced optical disk format currently in development that can store over 1 terabyte of data with transfer rates of 1 gigabit per second. HVDs use holography to store data in three dimensions, allowing them to store significantly more data than formats like Blu-ray discs. The technology behind HVDs, including how data is written and read using laser beams and holograms, is explained. Potential applications and advantages of HVDs, such as high storage capacity and transfer speeds making them suitable for data backup, are also covered.

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HOLOGRAHIC VERSATILE DISK GUIDED BY: MRS. V. SUDHARSHANI PRESENTED BY: K. SHAMINI
CONTENTS: Introduction Need of HVD 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 Future aspects conclusion
INTRODUCTION HVD is an advanced optical disk thats presently in the development stage. Storage capacity: 1 terabyte (Tb) Data transfer rate: 1 gigabit per second The technology permits over 1 kilobits of data to be written and read in parallel with a single flash.
Need for HVD?
Holographic versatile disk
Types of optical storage Capacity Writing/ Reading Speed Discs Approx. Cost Recordable Player Approx. Cost Holographic Versatile Discs (HDSS) HVD 300 GB 1.6 TB 1 GB/s $120 $3000 Blu-ray Discs BD 25 GB 50 GB 36.5 Mb/s $18 $2000 Digital Versatile Discs DVD HD- 5 GB 30 GB 36.5 Mb/s $10 $2000 Compact Discs CD 783 MB 1.3 GB 36.5 Mb/s $4 $200
What is HVD? Holographic versatile disk 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 3.9TB and a transfer rate of 1GBPS. 1HVD=5,500 CDs=830 DVDs=160 Blu-ray discs. Uses laser beams to store data in 3D.
Basics of holographic memory Holography is a method of recording patterns of light to produce a 3D object . Recorded patterns of light is called a hologram. Creation of a hologram begins with a focused beam of light, a laser. Laser splits up into two beams: 1. Reference beam 2. Information beam 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 the disk. To retrieve the information stored in a hologram, shine the reference beam onto the hologram. When it reflects off the hologram, it holds the image pattern of the stored image. This reconstruction beam is then sent to a CMOS sensor to recreate the original image.
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 servo info. A layer of dichroic mirrors, between the holographic and servo data layer reflects the blue-green laser beam, letting only the red laser to pass through it to reach the servo information .
The concepts of collinear holographic memories are: To increase the recording capacity, thick volume-recording media is used. Optical disk is pre-formatted with addresses and optical servo information. The beam for the optical servo is utilized to provide backward compatibility with d existing CDs and DVDs.
Holographic versatile disk
Structure of HVD The holographic versatile disk structure consists of the following components: Green writing/reading laser (532nm) Red position/addressing laser (650nm) Hologram (data) Polycarbon layer Photo polymeric layer (data-containing layer) Distance layers
Dichroic layer (reflecting green light) Aluminum reflective layer (reflecting red light) Transparent base
Writing Data a simplified HVD system consists of the following main components: Blue or green laser (532nm wavelength) Beam splitter/merger Mirrors Spatial light module (SLM) CMOS sensor Photopolymer recording medium
Information is encoded into binary and is stored in the SLM. These data are turned into ones and zeros 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.
Holographic versatile disk
Reading Data: To read, we have 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 is storing. The resulting light recreates the image of the page that established the light-interference pattern-reconstruction beam.
The CMOS sensor then reproduces the page data. The reconstruction beam-bounces back off the disc, it travels to the CMOS sensor.
Advantages, Disadvantages And Applications Advantages: More storage capacity Data transfer date is high Disadvantages: Initial price of the player and disk are high Price and data storage not confirmed still in R & D Applications: Used for storing large amounts of data most likely for large companies Could be the most efficient way to back up information in the near future.
Facts The entire US library of congress can be stored on six HVDs, assuming that every book has been scanned in the text format. The library of congress is the largest in the world and contains over 130 million items. The pictures of every landmass of earth-like the one shown in the Google earth can be stored on two HVDs.
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.
Conclusion The HDVs will soon replace DVDs and blu-ray disks. Currently supported by more than 170 of the worlds leading consumer electronics, personal computer, recording media, video game and music company. The format has also broad support from the major movie studios as a successor to today's DVD and blu-ray disk format.
Holographic versatile disk
Holographic versatile disk

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Holographic versatile disk

  • 1. HOLOGRAHIC VERSATILE DISK GUIDED BY: MRS. V. SUDHARSHANI PRESENTED BY: K. SHAMINI
  • 2. CONTENTS: Introduction Need of HVD 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 Future aspects conclusion
  • 3. INTRODUCTION HVD is an advanced optical disk thats presently in the development stage. Storage capacity: 1 terabyte (Tb) Data transfer rate: 1 gigabit per second The technology permits over 1 kilobits of data to be written and read in parallel with a single flash.
  • 6. Types of optical storage Capacity Writing/ Reading Speed Discs Approx. Cost Recordable Player Approx. Cost Holographic Versatile Discs (HDSS) HVD 300 GB 1.6 TB 1 GB/s $120 $3000 Blu-ray Discs BD 25 GB 50 GB 36.5 Mb/s $18 $2000 Digital Versatile Discs DVD HD- 5 GB 30 GB 36.5 Mb/s $10 $2000 Compact Discs CD 783 MB 1.3 GB 36.5 Mb/s $4 $200
  • 7. What is HVD? Holographic versatile disk 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 3.9TB and a transfer rate of 1GBPS. 1HVD=5,500 CDs=830 DVDs=160 Blu-ray discs. Uses laser beams to store data in 3D.
  • 8. Basics of holographic memory Holography is a method of recording patterns of light to produce a 3D object . Recorded patterns of light is called a hologram. Creation of a hologram begins with a focused beam of light, a laser. Laser splits up into two beams: 1. Reference beam 2. Information beam When light encounters an image its composition changes.
  • 9. 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 the disk. To retrieve the information stored in a hologram, shine the reference beam onto the hologram. When it reflects off the hologram, it holds the image pattern of the stored image. This reconstruction beam is then sent to a CMOS sensor to recreate the original image.
  • 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 servo info. A layer of dichroic mirrors, between the holographic and servo data layer reflects the blue-green laser beam, letting only the red laser to pass through it to reach the servo information .
  • 11. The concepts of collinear holographic memories are: To increase the recording capacity, thick volume-recording media is used. Optical disk is pre-formatted with addresses and optical servo information. The beam for the optical servo is utilized to provide backward compatibility with d existing CDs and DVDs.
  • 13. Structure of HVD The holographic versatile disk structure consists of the following components: Green writing/reading laser (532nm) Red position/addressing laser (650nm) Hologram (data) Polycarbon layer Photo polymeric layer (data-containing layer) Distance layers
  • 14. Dichroic layer (reflecting green light) Aluminum reflective layer (reflecting red light) Transparent base
  • 15. Writing Data a simplified HVD system consists of the following main components: Blue or green laser (532nm wavelength) Beam splitter/merger Mirrors Spatial light module (SLM) CMOS sensor Photopolymer recording medium
  • 16. Information is encoded into binary and is stored in the SLM. These data are turned into ones and zeros 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.
  • 18. Reading Data: To read, we have 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 is storing. The resulting light recreates the image of the page that established the light-interference pattern-reconstruction beam.
  • 19. The CMOS sensor then reproduces the page data. The reconstruction beam-bounces back off the disc, it travels to the CMOS sensor.
  • 20. Advantages, Disadvantages And Applications Advantages: More storage capacity Data transfer date is high Disadvantages: Initial price of the player and disk are high Price and data storage not confirmed still in R & D Applications: Used for storing large amounts of data most likely for large companies Could be the most efficient way to back up information in the near future.
  • 21. Facts The entire US library of congress can be stored on six HVDs, assuming that every book has been scanned in the text format. The library of congress is the largest in the world and contains over 130 million items. The pictures of every landmass of earth-like the one shown in the Google earth can be stored on two HVDs.
  • 22. 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.
  • 23. Conclusion The HDVs will soon replace DVDs and blu-ray disks. Currently supported by more than 170 of the worlds leading consumer electronics, personal computer, recording media, video game and music company. The format has also broad support from the major movie studios as a successor to today's DVD and blu-ray disk format.