Types optical disks
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Types optical disks

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Types optical disks Types optical disks Presentation Transcript

  • CD-ROM (COMPACT DISK) & DVD-ROM
  •  5 ¼ inch (12 cm) diameter SILVER OR GOLD LAYER IS USED THIN LAYER ON THE TOP REFLECTIVE SURFACE SPACE (650 MB --- 700MB) DISKS ( 120 mm 74/80 min) having also 650 MB --- 700MB 80 mm 21 min DISK HAVING 184 MB MINI DISKS ARE AVAILABLE IN DIFFERENT SHAPES CD-ROM DISKS ARE CALLED (ISO9660) INTERNATIONAL STANDARED ORGANIZATION
  • Different shapes View slide
  • TYPES OF DISKS DVD (Digital Video Disc) WORM DISK (CD-R) CD read/write (CD-RW) View slide
  • A. A polycarbonate disc layer has thedata encoded by using lands and pits.B. A reflective layer reflects the laserback.C. A lacquer layer is used to preventoxidationD. Artwork is screen printed on thetop of the disc.E. A laser beam reads thepolycarbonate disc, is reflectedback, and read by the player.
  • CAPACITY