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
Maxell optical disks are 100 percent certified, tested rigorously, and under a lifetime warranty.
Depending on the auditor's application, optical disk storage may offer certain advantages over microfilm or microfiche.
It plugs directly into any Ethernet network, provides a complete file management capability to any PC or workstation operating on UNIX or Novell environments and is the only optical storage device that converts the optical disk into a network storage peripheral.
Magneto optical disks are extremely reliable and durable because they are unaffected by magnetic fields and highly resistant to dirt and scratches.
ATG designs and manufactures 12 inch optical disks and optical storage devices.
Second, Eltrax was not able to ship a software interface for its optical disk product to DuPont's Clinical Review System.
However, optical disk archiving has proven to be labor intensive and cumbersome, and with clients ranging from small medical offices and clinics to 200+ bed hospitals, CCSI sought a new approach that would provide quick and easy access to patient data.
A single 14-inch optical disk from the Kodak optical disk system 6800 stores 10.
com/reports/c26962) has announced the addition of The Taiwanese Optical Disk Drive Industry, 3Q 2005 to their offering.
leads the market in the development, design and manufacturing of optical disk drives and small form factor 0.
Slot-Loaded Optical Disk Drive Eliminates Breakable Tray, Offers Fail-Safe Method of Extracting Media During Power Failure