optical disk
optical disc
or optical diskoptical disk
or optical discNoun | 1. | optical disk - a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface |
单词 | optical disk | |||
释义 | optical diskoptical discor optical diskoptical diskor optical disc
optical diskoptical 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. ..... Click the link for more information. . 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 ..... Click the link for more information. (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 ..... Click the link for more information. ), 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. ..... Click the link for more information. (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]optical disk
Synonyms for optical disk
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