optical disk


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Related to optical disk: optical disc, magnetic disk

optical disk,

any of a variety of information storage disks that are played or read using a laserlaser
[acronym for light amplification by stimulated emission of radiation], device for the creation, amplification, and transmission of a narrow, intense beam of coherent light. The laser is sometimes referred to as an optical maser.
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. Optical disks include compact discscompact disc
(CD), a small plastic disc used for the storage of digital data. As originally developed for audio systems, the sound signal is sampled at a rate of 44,100 times a second, then each sample is measured and digitally encoded on the 4 3-4 in (12 cm) disc as a series of
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 (CDs and CD-ROMs), laser discs (see videodiscvideodisc
or videodisk,
disk used with a special player and television to reproduce both pictures and sound. A videodisc player cannot record television programs off the air for later playback, unlike a videocassette recorder (VCR) or recordable DVD (see digital
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), and digital versatile discsdigital versatile disc
or digital video disc
(DVD), a small plastic disc used for the storage of digital data. The successor media to the compact disc (CD), a DVD can have more than 100 times the storage capacity of a CD.
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 (or digital video discs; DVDs and DVD-ROMs). WORM [Write Once/Read Many] disks can be used to record data, but once data is recorded it cannot be altered except by obliterating the old version and storing the new version on a previously unused portion of the disk. Magneto-optical disks, such as the rewritable optical disk and the recordable disk used with the Mini Disc player, have a special layer, as of barium ferrite, that can be magnetically polarized by a recording head when heated with a laser. Data or sound may be recorded to and erased from any portion of a magneto-optical disk multiple times.

optical disk

[′äp·tə·kəl ′disk]
(computer science)
A type of video disk storage device consisting of a pressed disk with a spiral groove at the bottom of which are submicrometer-sized depressions that are sensed by a laser beam.
References in periodicals archive ?
Taiwanese Optical Disk Drive Shipment Volume by Form Factor, 3Q 2008 - 4Q 2010
Depending on the auditor's application, optical disk storage may offer certain advantages over microfilm or microfiche.
Magneto optical disks are extremely reliable and durable because they are unaffected by magnetic fields and highly resistant to dirt and scratches.
Recently, our customers have begun demanding more efficient, less cumbersome storage than our optical disk system, so there was a pressing need for a solution that was easy to integrate, and provided scalability and value," said Randy Paul, VP of marketing for CCSI.
While our slot-loaded drive is designed to be operated safely and securely in a retail environment, it also has all the advanced features and high quality that are the hallmarks of Plextor optical disk drives used by enterprises, professionals, and consumers around the globe.
Ecma Standard 350 was developed by TC31, the Ecma Technical Committee created in 1984 for the standardization of optical disks and optical disk cartridges.
The data in this report covering the period from 2001 to 2007, provides an overview of the present market situation and possible trends in the Worldwide Optical Disk Device Market.
In the USA, Plasmon develops and manufactures magneto optical, CD/DVD and tape libraries and optical disk drives at its ISO-9001 certified facilities in Colorado Springs, Colorado.
Plasmon's worldwide headquarters are in Cambridge in the UK where the company develops and manufactures 12-inch optical disk products at its ISO-9001 certified facility and provides specialist technology consulting to the CD-R and DVD rewritable manufacturing industry.
Plasmon's world-wide headquarters are in Cambridge in the UK where the company develops and manufactures 12-inch optical disk products at its ISO-9001 certified facility and provides specialist technology consulting to the CD-R and DVD rewritable manufacturing industry.
Under the new agreement, Marubeni Solution will distribute Applied's optical disk solution, a key highlight of Nintendo GameCube development kits.
Over the past decade, phase-change material, a class of silvery semiconductors about as soft as lead, has emerged as a star ingredient of write-your-own optical disks.