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The laser printer was invented at Xerox PARC in the 1970s. Laser printers were introduced for the office and then home markets in subsequent years by IBM, Canon, Xerox, Apple, Hewlett-Packard and many others. Over the decades, quality and speed have increased as prices have decreased, and the once cutting-edge printing devices are now ubiquitous.
In computing, a printer is a peripheral machine which makes a durable representation of graphics or text, usually on paper. [1] While most output is human-readable, bar code printers are an example of an expanded use for printers. [2] Different types of printers include 3D printers, inkjet printers, laser printers, and thermal printers. [3]
Low to medium power laser diodes are used in laser pointers, laser printers and CD/DVD players. Laser diodes are also frequently used to optically pump other lasers with high efficiency. The highest-power industrial laser diodes, with power of up to 20 kW, are used in industry for cutting and welding. [75]
Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
HP introduced the mass-market laser printer, the LaserJet series II, in March 1987. The LaserJet II was designed as a laser printer with correct order page output as opposed to being leveraged from the Canon PC-20 personal copier. [6] The LaserJet II used PCL4, improved features, more memory and fonts for a market price of $2,695. [6]
Ink-jet printers use cartridges or reservoirs of ink and a moving print-head, while laser printers use heated elements and toner. Generally, ink-jet printers can excel at color, and are often less ...