A plastic-coated disk that stores digital data, such as music or text, as tiny pits on its surface. The disc is rotated rapidly, and a laser is reflected off the disc to an optical sensor, which is sampled periodically. If the laser strikes the flat area between pits, the sensor picks up the reflection and registers the digital value 1. If the laser strikes one of the pits, it is deflected from the sensor, and the sample value is a digital 0.
American Heritage Science
Optical Disk Sentence Examples
Describes the installation and configuration of optical disk drives for Linux.
Tip-off information has been on the increase and has proven to be very useful in deterring pirated optical disk manufacturers.
Other effects of OHS include visual blurring when the optical disk swells and strain on the heart as it tries to pump fluids through.