The hollows in a compact disc or DVD surface defining the data they contain. Pits measure less than 0.5 microns in width and are created by injection molding using a nickel stamper.
Holes on the surface of the optical storage media. Pits are the coded data and carry the information. See also Lands.
Recessed areas on the surface of a CD or DVD, separating lands, or flat areas. Lands and pits are used to represent data on a disc.
Pits are microscopic bumps that contain data, which are molded into the disc in a spiral track beginning at the inside of the disc.
Small voids caused when fibers are torn out of the panel edge or surface during machining or sanding.
The holes or roughness left on a bore surface as a result of rust or corrosion. Star-wheel Adjuster - A threaded screw used to actuate the brake shoe linings to the drum.
Holes that occur on the surface of metal cames and frames. Generally the result of corrosion.
Laser-etched holes in the CD-ROM tract that do not reflect light. Opposite of Lands. to top
holes burned into the CD track by the laser when recording.
Areas on the surface of DVDs or CDs used to represent data.
During optical encoding, pulses of a high power laser beam 'burn' microscopic 'pits' on the recording layer. The untouched spaces between such pits are called 'lands.' During the read process, the laser light focuses on the spinning spiral track, and since the pits reflect light less intensely, the read head detects the changes in reflectivity, and those transitions are processed as is to produce a binary data stream. In CD-ROM, the track pitch is 1.6 microns, and the pits are .83 microns wide. In DVD, the track pitch is 0.74 microns, and the pits are 0.4 microns wide. Maximum pit lengths are 10 times pit width.