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Gary Starkweather (seen here in 2009) invented the laser printer.. In the 1960s, the Xerox Corporation held a dominant position in the photocopier market. [2] In 1969, Gary Starkweather, who worked in Xerox's product development department, had the idea of using a laser beam to "draw" an image of what was to be copied directly onto the copier drum.
The band printer is a later variant where the characters are embossed on a flexible steel band. The LP27 from Digital Equipment Corporation is a band printer. Bar printers, where the character set is attached to a solid bar that moves horizontally along the print line, such as the IBM 1443. [21]
Philip Upali Wijewardene (17 February 1938 – 13 February 1983: Sinhala: උපාලි විජේවර්ධන) was a Sri Lankan business magnate and entrepreneur. In 1983, Wijewardene had a net worth of US $50 million. He was the founder and chairman of Upali Group, the first multi-national business in Sri Lanka.
3D printing, or additive manufacturing, is the construction of a three-dimensional object from a CAD model or a digital 3D model. [1] [2] [3] It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, [4] with the material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer.
Electron-beam lithography systems can be classified according to both beam shape and beam deflection strategy. Older systems used Gaussian-shaped beams that scanned these beams in a raster fashion. Newer systems use shaped beams that can be deflected to various positions in the writing field (also known as vector scan).
The beam of a single transverse mode (gaussian beam) laser eventually diverges at an angle that varies inversely with the beam diameter, as required by diffraction theory. Thus, the "pencil beam" directly generated by a common helium–neon laser would spread out to a size of perhaps 500 kilometers when shone on the Moon (from the distance of ...
1.5 Genus Idea – tree nymphs. 2 Subfamily Satyrinae. ... This is a list of the butterflies of family Nymphalidae which are found in Sri Lanka.
The 1971 Janatha Vimukthi Peramuna (JVP) insurrection (also known as the 1971 Revolt) was the first of two unsuccessful armed revolts conducted by the communist Janatha Vimukthi Peramuna (JVP) against the socialist United Front Government of Sri Lanka (then Ceylon) under Prime Minister Sirimavo Bandaranaike. The revolt began on 5 April 1971 and ...