Holographic versatile disc

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  • Records one program while watching another on the disc Interactive movie features. Backward Compatible: Supports CDs & DVDs also
  • Holographic versatile disc

    1. 1. HOLOGRAPHIC VERSATILE DISC
    2. 2. Outline <ul><li>What is HVD? </li></ul><ul><li>Collinear Holography. </li></ul><ul><li>Basic structure </li></ul><ul><li>How it work? </li></ul><ul><li>Compare with other devices. </li></ul><ul><li>Advantages/Disadvantages </li></ul><ul><li>Conclusion </li></ul>
    3. 3. What is HVD ? <ul><li>Holographic Versatile Disc (HVD) is an optical disc technology which would hold up to 3.9 terabytes (TB) of information. </li></ul><ul><li>It employs a technique known as collinear holography. </li></ul>
    4. 4. Collinear Holography <ul><li>In collinear holography there are two type of laser beam. </li></ul><ul><li>Red beam(Information beam) </li></ul><ul><li> Green beam(Refrence beam) </li></ul><ul><li>This two beams are collimated in a single beam. </li></ul><ul><li>The green laser reads data encoded as laser interference fringes from holographic layer near the top of the disc. </li></ul>
    5. 5. <ul><li>while the red laser is used as the reference beam and to read servo information from a regular CD-style aluminum layer near the bottom. </li></ul><ul><li>A dichroic mirror layer between the holographic data and the servo data reflects the green laser while letting the red laser pass through. </li></ul>
    6. 6. Basic structure <ul><li>It has similar to CD-DVD structure. It is differs to use laser beams & its pulse speed. </li></ul><ul><li>The Components are like … </li></ul><ul><li>blue or green laser(532 nmwl), </li></ul><ul><li> red laser ,beam splitter, mirrors </li></ul><ul><li>special lights modulator(SLM), </li></ul><ul><li>C-MOS sensor ,photo polymer </li></ul><ul><li>recording medium. </li></ul>
    7. 7. What is next ? 0.7 GB 9 GB 30~50 GB Optical Disc Technology
    8. 8. Holographic Versatile disc
    9. 9. How it works? <ul><li>Current optical storage saves one bit per pulse & the HVD hopes to improve this efficiency with capability of around 60,000 bits/pulse. </li></ul><ul><li>Truncated cone shape that has 200 micrometer diameter at the bottom & </li></ul><ul><li>500 micrometer diameter at top. </li></ul>
    10. 10. <ul><li>Data-SLM-Binary </li></ul><ul><li>Data is created to fire laser beam into the beam splitter to produce 2 beam. </li></ul><ul><li>1.Reference beam ( Directed to away </li></ul><ul><li>from the SLM). </li></ul><ul><li>2.Information beam ( Direct toward – </li></ul><ul><li>the SLM ). </li></ul>
    11. 11. <ul><li>The 0’s & 1’s data pages are translated into the pixel of the special light modulator that either block or tr- </li></ul><ul><li>ansmit light. </li></ul><ul><li>A memory system isn't very useful if you can't access the data you've stored. </li></ul>
    12. 12. Advantages <ul><li>HVD have the capacity to hold up to 3.9 terabytes (TB) of information, which is approximately 5,500 times the capacity of a CD-ROM,830 times the capacity of a DVD,160 times the capacity of single-layer Blu-ray Discs. </li></ul><ul><li>The HVD also has a transfer rate of 1Gbits/s(128MB/s). </li></ul>
    13. 13. <ul><li>Records one program while watching another on the disc </li></ul><ul><li>Interactive movie features. </li></ul><ul><li>Backward Compatible: Supports CDs & DVDs also </li></ul>
    14. 14. Disadvantages <ul><li>Holography memory has </li></ul><ul><li>been around for more than 40 years </li></ul><ul><li>but several characteristic made it difficult to implement , now progras </li></ul><ul><li>of HVD make it easy to implement. </li></ul><ul><li>It is not available in market. </li></ul>
    15. 15. <ul><ul><li>HVD will soon replace previous DVDs . </li></ul></ul><ul><ul><li>It is currently supported by more than 170 of the world's leading consumer electronics, personal computer, recording media, video game and music companies. </li></ul></ul><ul><ul><li>The format also has broad support from the major movie studios as a successor to today's DVD format . </li></ul></ul>

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