Fotokopi: Revizyonlar arasındaki fark

==Nasıl Çalışır (Elektrostatik Baskı)==

 

#'''Charging''': The surface of a cylindrical drum is given an electrostatic charge by either a high voltage wire called a corona wire or a charge roller. The drum is coated with a photoconductive material, such as [[selenium]]. A [[photoconductivity|photoconductor]] is a [[semiconductor]] that becomes conductive when exposed to light.

#'''Exposure''': A bright lamp illuminates the original document, and the white areas of the original document reflect the light onto the surface of the photoconductive drum. The areas of the drum that are exposed to light (those areas that correspond to white areas of the original document) become conductive and therefore discharge to ground. The area of the drum not exposed to light (those areas that correspond to black portions of the original document) remain negatively charged. The result is a latent electrical image on the surface of the drum.