multilevel optical disc
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multilevel optical disc
An optical storage technology that uses multiple recording platters for higher capacity. Typically, DVDs and Blu-ray discs are available in two or more layers. In 1994, at its Almaden Research Center in San Jose, CA, IBM prototyped multilayer technology. See DVD and Blu-ray.
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| Multiple Layers |
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| Sandwiched together, the individual layers are accessed by focusing the lens on one of the surfaces. |
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| Sides and Layers |
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| DVDs come in any combination of single or double sided with single or double layers. This shows the laser beam contacting the recorded surface in all of the possibilities. |
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