Laserdrukker: Verskil tussen weergawes
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'n '''Laserdrukker''' is 'n algemene tipe [[rekenaardrukker]] wat vinnig hoë-kwaliteit teks- en grafiese drukwerk op gewone papier kan lewer. Laserdrukkers gebruik net soos [[fotostaatmasjien]]e 'n [[xerografies]]e drukproses maar verskil van analoë fotostaatmasjiene deurdat die beeld geskep word deur 'n [[laser|laserstraal]] oor die drukker se fotoreseptor te skandeer. |
'n '''Laserdrukker''' is 'n algemene tipe [[rekenaardrukker]] wat vinnig hoë-kwaliteit teks- en grafiese drukwerk op gewone papier kan lewer. Laserdrukkers gebruik net soos [[fotostaatmasjien]]e 'n [[xerografies]]e drukproses maar verskil van analoë fotostaatmasjiene deurdat die beeld geskep word deur 'n [[laser|laserstraal]] oor die drukker se fotoreseptor te skandeer. |
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==Oorsig== |
== Oorsig == |
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Die gebruik van laserdrukkers het baie voordele bo ander soorte drukkers. Anders as by impakdrukkers is 'n laserdrukker se spoed veranderlik. Dit hang grootliks af van die hoeveelheid besonderhede wat vervat is in die grafiese beeld wat verwerk word. Die vinnigste modelle kan soveel as 200 monochroom bladsye per minuut lewer (d.w.s. 12 000 bladsye per uur). Die vinnigste kleurlaserdrukkers kan soveel as 100 bladsye per minuut lewer (oftewel 6 000 bladsye per uur). Hoë-snelheidslaserdrukkers word gebruik vir massapos van verpersoonlikte dokumente soos kredietkaart- en munisipale rekeninge en kompeteer goed met [[litografie]] in sommige kommersiële toepassings. (Die Xerox 9700 laser drukker, druk sowat 120 bladsye per minuut [http://www.castleink.com/_a-lphis.html].) |
Die gebruik van laserdrukkers het baie voordele bo ander soorte drukkers. Anders as by impakdrukkers is 'n laserdrukker se spoed veranderlik. Dit hang grootliks af van die hoeveelheid besonderhede wat vervat is in die grafiese beeld wat verwerk word. Die vinnigste modelle kan soveel as 200 monochroom bladsye per minuut lewer (d.w.s. 12 000 bladsye per uur). Die vinnigste kleurlaserdrukkers kan soveel as 100 bladsye per minuut lewer (oftewel 6 000 bladsye per uur). Hoë-snelheidslaserdrukkers word gebruik vir massapos van verpersoonlikte dokumente soos kredietkaart- en munisipale rekeninge en kompeteer goed met [[litografie]] in sommige kommersiële toepassings. (Die Xerox 9700 laser drukker, druk sowat 120 bladsye per minuut [http://www.castleink.com/_a-lphis.html].) |
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Instead the image data is built up and stored in a large bank of memory capable of representing every dot on the page. The requirement to store all dots in memory before printing has traditionally limited laser printers to small fixed paper sizes such as letter or A4. Most laser printers are unable to print continuous banners spanning a sheet of paper two meters long, because there is not enough memory available in the printer to store such a large image before printing begins. |
Instead the image data is built up and stored in a large bank of memory capable of representing every dot on the page. The requirement to store all dots in memory before printing has traditionally limited laser printers to small fixed paper sizes such as letter or A4. Most laser printers are unable to print continuous banners spanning a sheet of paper two meters long, because there is not enough memory available in the printer to store such a large image before printing begins. |
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==History== |
== History == |
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The laser printer, based on a modified xerographic copier, was invented at [[Xerox]] in 1969 by researcher [[Gary Starkweather]], who had a fully functional networked printer system working by [[1971]].<ref>{{cite book | title = Milestones in Computer Science and Information Technology | author = Edwin D. Reilly | publisher = Greenwood Press | year = 2003 | isbn = 1573565210 | url = http://books.google.com/books?id=JTYPKxug49IC&pg=PA152&dq=starkweather+laser-printer&as_brr=0&ei=DpHkRsKzPJfopQKTnazMDA&sig=nuw5tTFds6HmRQQmYFwunH8t6BU }}</ref><ref>{{cite book | title = A History of the Personal Computer: The People and the Technology | author = Roy A. Allan | publisher = Allan Publishing | year = 2001 | isbn = 0968910807 | url = http://books.google.com/books?id=FLabRYnGrOcC&pg=RA2-PR48&dq=starkweather+laser-printer+1971+parc&as_brr=0&ei=LpPkRraBJ4XapAK9hsCtBQ&sig=VuDclYJPxA0q6f2j4oW3BxQ2U78 }}</ref> Laser printing eventually became a multibillion-dollar business for Xerox. |
The laser printer, based on a modified xerographic copier, was invented at [[Xerox]] in 1969 by researcher [[Gary Starkweather]], who had a fully functional networked printer system working by [[1971]].<ref>{{cite book | title = Milestones in Computer Science and Information Technology | author = Edwin D. Reilly | publisher = Greenwood Press | year = 2003 | isbn = 1573565210 | url = http://books.google.com/books?id=JTYPKxug49IC&pg=PA152&dq=starkweather+laser-printer&as_brr=0&ei=DpHkRsKzPJfopQKTnazMDA&sig=nuw5tTFds6HmRQQmYFwunH8t6BU }}</ref><ref>{{cite book | title = A History of the Personal Computer: The People and the Technology | author = Roy A. Allan | publisher = Allan Publishing | year = 2001 | isbn = 0968910807 | url = http://books.google.com/books?id=FLabRYnGrOcC&pg=RA2-PR48&dq=starkweather+laser-printer+1971+parc&as_brr=0&ei=LpPkRraBJ4XapAK9hsCtBQ&sig=VuDclYJPxA0q6f2j4oW3BxQ2U78 }}</ref> Laser printing eventually became a multibillion-dollar business for Xerox. |
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As with most electronic devices, the cost of laser printers has fallen markedly over the years. In 1985 the HP LaserJet sold for $2995.00 and weighed 71 pounds (32.2 kg). The Apple LaserWriter (which shipped with a more powerful processor and the Postscript page description language) weighed about 70 lb and cost almost $7000.00. (Work rules in the factory producing the Laserwriter forbade any worker lifting the printer unassisted.) Today a comparable laser printer with more memory, a higher speed and duplexing capability costs about $300.00. A bare-bones laser printer costs less than $100.00. |
As with most electronic devices, the cost of laser printers has fallen markedly over the years. In 1985 the HP LaserJet sold for $2995.00 and weighed 71 pounds (32.2 kg). The Apple LaserWriter (which shipped with a more powerful processor and the Postscript page description language) weighed about 70 lb and cost almost $7000.00. (Work rules in the factory producing the Laserwriter forbade any worker lifting the printer unassisted.) Today a comparable laser printer with more memory, a higher speed and duplexing capability costs about $300.00. A bare-bones laser printer costs less than $100.00. |
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==How it works== |
== How it works == |
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{{mainarticle|Xerography}} |
{{mainarticle|Xerography}} |
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Cough; irritation eyes; in presence of [[Polycyclic aromatic hydrocarbon|polycyclic aromatic hydrocarbons]]: [potential occupational carcinogen]" (cdc.gov) <ref>{{cite web|title=NIOSH Document: Pocket Guide to Chemical Hazards (2005-149): Carbon black | CDC/NIOSH|url=http://www.cdc.gov/niosh/npg/npgd0102.html}} 070821 cdc.gov</ref> |
Cough; irritation eyes; in presence of [[Polycyclic aromatic hydrocarbon|polycyclic aromatic hydrocarbons]]: [potential occupational carcinogen]" (cdc.gov) <ref>{{cite web|title=NIOSH Document: Pocket Guide to Chemical Hazards (2005-149): Carbon black | CDC/NIOSH|url=http://www.cdc.gov/niosh/npg/npgd0102.html}} 070821 cdc.gov</ref> |
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==See also== |
== See also == |
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*[[Daisy wheel printer]] |
*[[Daisy wheel printer]] |
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*[[Dot matrix printer]] |
*[[Dot matrix printer]] |
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Wysiging soos op 05:49, 10 September 2018
'n Laserdrukker is 'n algemene tipe rekenaardrukker wat vinnig hoë-kwaliteit teks- en grafiese drukwerk op gewone papier kan lewer. Laserdrukkers gebruik net soos fotostaatmasjiene 'n xerografiese drukproses maar verskil van analoë fotostaatmasjiene deurdat die beeld geskep word deur 'n laserstraal oor die drukker se fotoreseptor te skandeer.
Oorsig
Die gebruik van laserdrukkers het baie voordele bo ander soorte drukkers. Anders as by impakdrukkers is 'n laserdrukker se spoed veranderlik. Dit hang grootliks af van die hoeveelheid besonderhede wat vervat is in die grafiese beeld wat verwerk word. Die vinnigste modelle kan soveel as 200 monochroom bladsye per minuut lewer (d.w.s. 12 000 bladsye per uur). Die vinnigste kleurlaserdrukkers kan soveel as 100 bladsye per minuut lewer (oftewel 6 000 bladsye per uur). Hoë-snelheidslaserdrukkers word gebruik vir massapos van verpersoonlikte dokumente soos kredietkaart- en munisipale rekeninge en kompeteer goed met litografie in sommige kommersiële toepassings. (Die Xerox 9700 laser drukker, druk sowat 120 bladsye per minuut [1].)