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Large-format Slide Projector
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). The light source generates a lot of heat even when filtered to only visible light; the projected transparency is protected from overheating by the heat being distributed across its large area, and cooling fans. Slide formats include 18 × 18 cm (7.1 × 7.1") or 24 × 24 cm (9.4 × 9.4"). Projection art These formats are so large that it is possible to project slides painted with heat resistant translucent colours as a special kind of art (projection art). The light output of the projector is large enough to project onto whole buildings. History The first large-format slide projectors were built in the middle of the 20th century as background projectors for theaters and opera houses. From the early 50', the german Brand Reiche&Vogel w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Ravensburg Konzerthaus PANI-Projektor 01
Ravensburg ( or ; Swabian German, Swabian: ''Raveschburg'') is a city in Upper Swabia in Southern Germany, capital of the Ravensburg (district), district of Ravensburg, Baden-Württemberg. Ravensburg was first mentioned in 1088. In the Middle Ages, it was an Imperial Free City and an important trading centre. The "Great Ravensburg Trading Society" (''Große Ravensburger Handelsgesellschaft'') owned shops and trading companies all over Europe. The historic city centre is still very much intact, including three city gates and over 10 towers of the medieval fortification. History Ravensburg was first mentioned in writing in 1088. It was founded by the House of Welf, Welfs, a Franks, Frankish dynasty in Swabia who became later Dukes of Duchy of Bavaria, Bavaria and Duchy of Saxony, Saxony and who made the castle of Ravensburg their ancestral seat. By a contract of inheritance, in 1191 the Hohenstaufen Frederick Barbarossa acquired the ownership of Ravensburg from Welf VI, Duke of S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |