Difference between revisions of "Laserdisc"

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== Description ==
 
== Description ==
  
An early videodisc that used reflected laser beam to playback audio and video signals to a television. [http://cameo.mfa.org/materials/fullrecord.asp?name=Optical%20disc Optical disc] technology was patented in 1961 but Laserdiscs did not reach the market until 1978. They were made from thin circular plates of [http://cameo.mfa.org/materials/fullrecord.asp?name=metal metal], [http://cameo.mfa.org/materials/fullrecord.asp?name=glass glass], or [http://cameo.mfa.org/materials/fullrecord.asp?name=polycarbonate polycarbonate] with a reflective metallic surface. They varied in size form 4.7 to 11.8 inches in diameter. The signal was recorded as a sequence of holes. The laserdisc reader used a [http://cameo.mfa.org/materials/fullrecord.asp?name=laser laser] to scan the patterns then translated the variations in light intensity into video and audio signals. Laserdiscs were superseded in 1995 by the introduction of [http://cameo.mfa.org/materials/fullrecord.asp?name=digital%20versatile%20disc digital videodiscs] (DVD).
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An early videodisc that used reflected laser beam to playback audio and video signals to a television. [[Optical disk]] technology was patented in 1961 but Laserdiscs did not reach the market until 1978. They were made from thin circular plates of [[metal]], [[glass]], or [[polycarbonate]] with a reflective metallic surface. They varied in size form 4.7 to 11.8 inches in diameter. The signal was recorded as a sequence of holes. The laserdisc reader used a [[laser]] to scan the patterns then translated the variations in light intensity into video and audio signals. Laserdiscs were superseded in 1995 by the introduction of [[digital versatile disc|digital videodiscs]] (DVD).
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
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laser disc; laser disk; optical disc; Reflective Optical Videodisc System (initial name); Disco-Vision (2nd name; 1969); DiscoVision (3rd name, 1978, first product marketed); LaserDisc (4th name, 1981); Laserdisc (revised produce name and later common name)
 
laser disc; laser disk; optical disc; Reflective Optical Videodisc System (initial name); Disco-Vision (2nd name; 1969); DiscoVision (3rd name, 1978, first product marketed); LaserDisc (4th name, 1981); Laserdisc (revised produce name and later common name)
  
== Authority ==
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==Resources and Citations==
  
* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "laserdisc" Encyclopædia Britannica Premium Service. [Accessed 25 Jan. 2006].
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "laserdisc" [Accessed 25 Jan. 2006].
  
* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Laserdisc (Accessed Feb. 2, 2006)
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* Wikipedia: http://en.wikipedia.org/wiki/Laserdisc (Accessed Feb. 2, 2006)
  
 
* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998
 
* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998

Latest revision as of 12:49, 29 September 2022

Description

An early videodisc that used reflected laser beam to playback audio and video signals to a television. Optical disk technology was patented in 1961 but Laserdiscs did not reach the market until 1978. They were made from thin circular plates of Metal, Glass, or Polycarbonate with a reflective metallic surface. They varied in size form 4.7 to 11.8 inches in diameter. The signal was recorded as a sequence of holes. The laserdisc reader used a Laser to scan the patterns then translated the variations in light intensity into video and audio signals. Laserdiscs were superseded in 1995 by the introduction of digital videodiscs (DVD).

Synonyms and Related Terms

laser disc; laser disk; optical disc; Reflective Optical Videodisc System (initial name); Disco-Vision (2nd name; 1969); DiscoVision (3rd name, 1978, first product marketed); LaserDisc (4th name, 1981); Laserdisc (revised produce name and later common name)

Resources and Citations

  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998