Holographic Memory
Upcoming SlideShare
Loading in...5
×
 

Holographic Memory

on

  • 2,921 views

HOLOGRAPHIC MEMORY

HOLOGRAPHIC MEMORY

Statistics

Views

Total Views
2,921
Views on SlideShare
2,916
Embed Views
5

Actions

Likes
0
Downloads
242
Comments
1

2 Embeds 5

http://www.slideshare.net 4
http://www.health.medicbd.com 1

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Holographic Memory Holographic Memory Presentation Transcript

  • RENJITH PS RENJITH PS
    • Holographic memory is a technology that can store information at high density inside crystals or photopolymers .
    • The advantage of this type of data storage is that the volume of the recording media is used instead of just the surface .
  • Technical aspects
    • Like other media, holographic media is divided into write once and rewritable media .
    • Rewritable holographic storage can be achieved via the photorefractive effect in crystals
    • Mutually coherent light from two sources creates an interference pattern in the media. These two sources are called the reference beam and the signal beam
      • To record on the hologram, the data in the form of electric signal is converted to optical signals by a page composer
    • The controller generates the address to access the desired page
    • This results in the exposure of a small area of the recording medium through an aperture
    • The optical output signal is directed to the exposed area by the deflector
    • Using this beam deflecting mechanism, the light (which carries the information) and the reference beam are made to interact
    • The interference pattern is thus recorded on the hologram. To record a different page, the aperture is moved and the above process is repeated.
    • To retrieve the information stored in a hologram, shine the reference beam directly onto the hologram. When it reflects off the hologram, it holds the light pattern of the image stored there. Then send this reconstruction beam to a CMOS sensor to recreate the original image.
  •  
  • ADVANTAGES
    • HVD offers several advantages over traditional storage technology. HVDs can ultimately store more than 2 terabyte (TB) of information -- that's 400 times more than a single-sided DVD and 40 times more than a current double-sided Blu-ray than a single-sided DVD and 20 times more than a current double-sided Blu-ray DVD
    • HVDs also use a thicker recording layer than DVDs -- an HVD stores information in almost the entire volume of the disc, instead of just a single, thin layer.
    • HVDs storing holograms in overlapping patterns , while a DVD basically stores bits of information side-by-side
    • The other major boost over conventional memory systems is HVD's transfer rate of up to 1 gigabyte (GB) per second -- that's 40 times faster than DVD. An HVD stores and retrieves an entire page of data, approximately 60,000 bits of information, in one pulse of light, while a DVD stores and retrieves one bit of data in one pulse of light.
  •  
  •  
  • Development and marketing
    • At the National Association of Broadcasters 2005 (NAB) convention in Las Vegas, conducted the first public demonstrations of the world’s first prototype of a commercial storage device at the Maxell Corporation of America booth.
    • The three main companies involved in developing holographic memory, Polaroid spinoff Aprilis, and Optware of Japan ,IBM
  •