What is HVD? HVD is a new type of optical storage device HVD can store from 300 GB in 2008 up to 3.9 TB Normal DVD holds 4.7 GB Developed by InPhase Tech.

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Presentation transcript:

What is HVD? HVD is a new type of optical storage device HVD can store from 300 GB in 2008 up to 3.9 TB Normal DVD holds 4.7 GB Developed by InPhase Tech & Maxell Uses 2 lasers to read the same part of the disc by changing the angle of one laser

Holographic? Leia in Star Wars is a ‘volumetric display’, not a holograph A hologram is a way to store 3 dimensional images

How does it write the disc? Two beams are used, the reference beam and the information beam The reference beam remains unchanged, while the information beam is sent through a spatial light modulator The beams are recombined, creating an interference pattern of light

Laser Beams?!? While one beam is used to reflect off the Dichroic mirror layer in the disc, another is used for servo This servo technology is the same used in CDs & DVDs, using a 650nm laser to read address pits

How does it read the disc? When the reference beam is shone onto the disc it returns the pre-recorded interference pattern The beam is then read by the cmos as a page at about 128MB/s

Market Info Technology is slowly becoming easier to make, smaller discs will be available in a few years HVD’s can be mass produced effectively as data can be pre-written when the disc is put together

QUESTIONS?