The Inner Workings of CD/DVD Drives episodes:

• January 01, 1990Trace light rays as they pass through the lens and its clone.

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• January 01, 1990Look more closely at the point where the laser focuses.

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• January 01, 1990Simplfy things by straightening out the beam's path.

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• January 01, 1990But we need to figure out how the lens should move.

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• January 01, 1990So the lens is suspended inside an electromagnet.

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• January 01, 1990But disks are not flat . . . so things get complicated.

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• January 01, 1990The disk's pattern of pits is translated into an optical signal.

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• January 01, 1990This is the path followed by photons of beam.

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• January 01, 1990The laser passes through a splitter and lens, bouncing off the disk to the detector.

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• January 01, 1990Here are its basic components.

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