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Optical Drives

Optical Drives. By Carola Rutigliani. What is an Optical Drive?. An optical drive is a piece of equipment that uses a laser to read or write information on a disc. Some examples.

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Optical Drives

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  1. Optical Drives By CarolaRutigliani

  2. What is an Optical Drive? • An optical drive is a piece of equipment that uses a laser to read or write information on a disc.

  3. Some examples • a Digital Versatile Disc(DVD) player, Blu-ray disc (BD) player, and Compact Disc (CD) players are considered optical drives even though they may not be in a computer system.  DVD player BD player CD player

  4. The Optical Path • The optical path makes an optical drive work. The optical path is composed of three components: -a laser : writes and reads the data. -lens : guides the laser across the surface of the disc. -aphotodiode: detects light reflected off the disc’s surface.

  5. The drive also uses two servomechanisms: • one to maintain the proper distance between the disc and laser. • to make sure the laser is moving in a continuous spiral path.

  6. How does it work? • The rotational mechanism in an optical drive differs considerably from that of a hard disk drives. • The disc keeps a constant angular velocity (CAV), in other words a constant number of revolutions per minute (RPM).

  7. THE END

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