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LightJet is a brand of hardware used for
photographic printing Photographic printing is the process of producing a final image on paper for viewing, using photographic paper, chemically sensitized paper. The paper is exposed to a photographic Negative (photography), negative, a positive reversal film, transp ...
of digital images to
photographic paper Photographic paper is a coated paper, paper coated with a light-sensitive chemical, used for making photographic prints. When photographic paper is exposed to light, it captures a latent image that is then Photographic developer, developed to form ...
and
film A film, also known as a movie or motion picture, is a work of visual art that simulates experiences and otherwise communicates ideas, stories, perceptions, emotions, or atmosphere through the use of moving images that are generally, sinc ...
. LightJet printers are no longer manufactured but are however remanufactured and resold; and their lasers are still manufactured. LightJet is a trademark of Océ Display Graphics Systems, a division of Océ N.V. (the company that acquired Cymbolic Sciences, Inc.) In 2010 Océ was acquired by
Canon Canon or Canons may refer to: Arts and entertainment * Canon (fiction), the material accepted as officially written by an author or an ascribed author * Literary canon, an accepted body of works considered as high culture ** Western canon, th ...
of Japan. The term "LightJet" is often used to generically describe a digitally made chromogenic print. Competing manufactures of equipment include ZBE Chromira and Durst Lambda.Luxlab Glossary (2011)

Luxlab, retrieved on 27 March 2011
They may be used in
Minilab A minilab is a small photographic Film developing, developing and printing system or machine, as opposed to large centralized photo developing labs. Many retail stores use film or digital minilabs to provide on-site photo finishing services. With ...
s.


Details

Unexposed silver-halide (AgX) photographic paper is temporarily fixed on a stationary internal drum, where three digitally controlled
laser A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word ''laser'' originated as an acronym for light amplification by stimulated emission of radi ...
s simultaneously expose the photo-sensitive emulsion on the paper medium (or back-lit transparency medium) with red, green and blue laser light. The amount of light from each laser varies to provide specific color and density values for each pixel imaged to the print. The light-path includes a spinning surface coated mirror mounted on an air-bearing that travels along the axis of the internal drum, thus reflecting the laser light at 90 degrees allowing for a dimensionally consistent round imaging dot across the entire area of the photographic paper. The purpose of this round imaging dot is to maintain edge to edge sharpness on the final print. The print is then processed using traditional photochemical means (usually RA4). After which the photographic print is handled just as any other photo-print. Whereas
xerography Xerography is a dry photocopying technique. Originally called electrophotography, it was renamed xerography—from the Greek roots , meaning "dry" and , meaning "writing"—to emphasize that unlike reproduction techniques then in use such as c ...
and
inkjet printing Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper or plastic substrates. Inkjet printers were the most commonly used type of printer in 2008, and range from small inexpensi ...
employ a
halftone Halftone is the reprographic technique that simulates continuous tone, continuous-tone imagery through the use of dots, varying either in size or in spacing, thus generating a gradient-like effect.Campbell, Alastair. ''The Designer's Lexicon''. ...
process and ink to reproduce digital images on paper, digital-C is a photographic continuous tone process rather than
halftone Halftone is the reprographic technique that simulates continuous tone, continuous-tone imagery through the use of dots, varying either in size or in spacing, thus generating a gradient-like effect.Campbell, Alastair. ''The Designer's Lexicon''. ...
or error diffusion which are common on offset press or ink-jet. The device natively supports 24-bit RGB raster files, and is capable printing vector based files when fronted by a photographic Raster Image Processor (RIP). 24 bit color continuous-tone devices use large multitudes of colors, up to 16,777,216, rather than the small number of colors available to 4-color press and 8-color ink-jet type devices. Therefore,
posterization Posterization or posterisation of an image is the conversion of a continuous gradation of tone to several regions of fewer tones, causing abrupt changes from one tone to another. This was originally done with photographic processes to create ...
and banding are unlikely from these types of prints when provided with a file of good integrity. Due to slight halation of the light source, digital C-prints produced on high end equipment have true continuous tones not possible with images created with ink or pigments (due to CMYK halftone limitations). LightJet printers and film recorders are used by a number of professional-level photographic printing firms. Most deliver a final product printed on
Fujifilm , trading as , or simply Fuji, is a Japanese Multinational corporation, multinational Conglomerate (company), conglomerate headquartered in Tokyo, Japan, operating in the areas of photography, optics, Office supplies, office and Biomedical engine ...
Crystal Archive or Kodak Endura paper in sizes up to at least 4×10 feet. Other silver-halide based materials can also be printed on laser driven devices such as the LightJet. The LightJet printers were manufactured in Vancouver, BC, Canada; the core internal drum technology was developed by Dan Gelbart at MacDonald Dettwiler & Associates (MDA) in the 1980s, and later refined by Cymbolic Sciences. Key individuals responsible for the success of LightJet series include Dale Benjamin, Tim Crandall, Rolf Dekleer, Dave Fraser, Robert Heath, Alex Holowko, Larry Kiser, Miranda Clegg, Chris Lynn, Wenny Macura, Derek Montgomery, Dan Murray, Karen Neufeld, Didier Primat, Alastair Reed, Jeff Rittichier, Horst Schaaf, Ken Smith, and Dan Whittle. The original LightJet image recorder was introduced at PMA in 1995. The first version of the product was the LightJet2000, a three-laser continuous-tone film recorder (the selling price was US$195,000). Its maximum image size was 11×14 inches. The LightJet2000 largely replaced the Fire1000 film recorder. The LightJet5000 large-format printer was introduced at PMA in 1996. The product produced continuous-tone photographic prints and Duratrans up to 50×50 inches. In 1997 a version capable of printing to a dimensional size limit of 50×100 inches was introduced. The Océ LightJet430 50" x 120" (image size) photo laser printer was introduced in 2000. The 76" x 120" (image size) Océ LightJet500XL printer was introduced in 2002.


See also

* Chromogenic * Chromogenic print *
Photograph A photograph (also known as a photo, or more generically referred to as an ''image'' or ''picture'') is an image created by light falling on a photosensitivity, photosensitive surface, usually photographic film or an electronic image sensor. Th ...


References

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