Rotating disc pits
The capacity of optical storage discs – CD, DVD or Blu-Ray and HD-DVD – could be increased eightfold with a new trick developed by engineers working for Thomson in Germany. Optical discs are covered with millions of identical microscopic pits, but on the new discs those pits will be differently shaped. The laser beam used to record each pit on the disc surface is split down the middle, with one false
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Tags: invention patents
