Optical Disk

A disk in which light is the medium used to record and read data. The disk is made of clear polycarbonate plastic, covered with a layer of dye, a thin layer of gold which reflects the laser beam, and a protective layer over that. A recording is made by sending pulses from a laser beam which make a pattern in the layer of dye. The recording is read later by directing a laser beam at the disk and interpreting the pattern of reflected light. CDs, CD-ROMs, and DVDs are examples of optical disks.

Articles on KurzweilAI.net that refer to Optical Disk

Top KurzweilAI.net News of 2002 By Ray Kurzweil and Amara D. Angelica
Notes and References By K. Eric Drexler

News Articles that refer to Optical Disk

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