Introduction to Holographic Versatile Disc Seminar Topic:

This presentation is about a “Holographic Versatile Disc”, which is an optical disc technology and which has capability of holding 3.9Tb of data.

HVD Structure:

HVD uses a technique where green and red laser of length 532nm and 650nm respectively are collimated in a single beam. HVD provides a high-capacity data storage. Servo information is used to monitor the position of the read head, track and sector information on a conventional hard disk drive. 

HVD write system:

HVD write system consists of Blue or green laser, beam splitter merger, mirrors, Spatial light modulator (SLM), CMOS sensor and Polymer recording medium. Data written on HVD will get encoded into binary data, which will get stored in SLM. This data turned into 0’s and 1’s on a page, where page is the image that the information beam is passing through. 

HVD read system:

Data from HVD can be read by retrieving the light pattern stored in the hologram.

Advantages of using HVD:

HVD advantages are listed below:

ü  HVD has 300GB of initial storage capacity.

ü  Holographic memory systems offer far more storage capacity than CDs, DVDs and Blue-ray Discs. Entire page of data can be retrieved quickly and at one time by using this memory system.

ü  HVD helps user to store large amount of data

ü  HVD is helpful to record one program simultaneously watching another program on the disc.

ü  HVD has a capability of searching empty space on the disc automatically to avoid the occurrence of overlapping of recording one program over the other.

ü  The transfer rates of HVD i.e., both read and write speed is up to 1GB per second and it is backward compatible too. 

Conclusion:

HVD is a popular technology in high-capacity, optical storage media.  HVD supported by more than 170 of the world’s leading consumer electronics recording media, video game and music companies.

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