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Laser Photoplotter
A photoplotter is a specialized electro-opto-mechanical machine that exposes a latent image on a medium, usually high-contrast monochromatic (black-and-white) photographic film, using a light source under computer control. Once the film has been exposed, it must be photographic processing, processed before it is ready for use. Photoplotters are used primarily for industrial production of printed circuit boards (PCB) and integrated circuit (IC) packaging. In the PCB industry, photoplotting is the first step of making photolithography masks for printed circuit boards. These masks are called ''photoplots'' and are limited in resolution by the technology in use; in 1998 photoplots with resolvable details of 2.5 micrometre, µm or more were possible. Integrated circuits are made in a similar fashion utilizing ''photomasks'' with sub-micrometer feature sizes; photomasks are traditionally made by photoreducing photoplotter output. Other application of photoplotters include chemical milli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black-and-white
Black-and-white (B&W or B/W) images combine black and white in a continuous spectrum, producing a range of shades of grey. Media The history of various visual media began with black and white, and as technology improved, altered to color. However, there are exceptions to this rule, including black-and-white fine art photography, as well as many film motion pictures and art film(s). Photography Contemporary use Since the late 1960s, few mainstream films have been shot in black-and-white. The reasons are frequently commercial, as it is difficult to sell a film for television broadcasting if the film is not in color. 1961 was the last year in which the majority of Hollywood films were released in black and white. Computing In computing terminology, ''black-and-white'' is sometimes used to refer to a binary image consisting solely of pure black pixels and pure white ones; what would normally be called a black-and-white image, that is, an image containing shades of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
