Reflected light document reading head

摘要: A device for converting information in the form of marks or punched holes on documents into electronic signals which are translated a acceptable to computer. The device, commonly called reading head, senses intensity light reflected from document being read, directed upon controlled, remote source. is focused onto surface source through system lenses and optical fibers. Phototransistors each side sense document. By focusing mounting phototransistors at proper angle close surface, greatly improved accuracy results obtained.