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A '''large-format slide projector''' (also often called "large-format projector" or "large-image projector") is a kind of [[slide projector]] for large image projection which has a very powerful [[light source]] (up to 12 thousand watts using [[arc lamps]]). Therefore it is necessary to use a large slide format to protect the slide material from overheating during the projection process (even when the light is filtered to only visible light and the slide is cooled with strong slide cooling fans). Slide formats include 18
==Projection art==
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==Manufacturers==
Large scale image projectors have been pioneered by manufacturers Pani, Hardware Xenon and PIGI. These projectors are usually described as scenic projectors, and project light through photographic or inkjet media, unlike video projectors that reflect light off of LCD or DMD (digital micro mirror, sometimes referred to as DLP) devices. Despite advancements in video technology, still image projectors are still capable of many times the luminous output of video projection devices. Scenic projectors sometimes utilize roll based projection media, which allows quick access to hundreds of images and the creation of scrolling imagery, as well as rotating imagery.
The most powerful image projectors in the world are built by the company XL Productions. These one of a kind image projectors utilize large format lenses designed for Cold War surveillance systems, such as the U2 spy plane, and use other advanced optical systems and techniques to achieve image sizes and brightness levels far beyond that which is capable with commercially available projectors. XL Productions has presented imagery for events like the Olympics, the Super Bowl and other special productions. In 2000, XL Productions achieved projected image sizes as much as one mile across on [[Sugarloaf Mountain (Brazil)|Sugarloaf Mountain]] in Rio de Janeiro, Brazil.
==See also==
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