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 which has a very powerful light source (up to 12 thousand kilowatts 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 of 18x18cm (7,1x7,1") or 24x24cm (9,4x9,4").
On the other hand this formats are such 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 such enormous that it is possible to cover whole buildings with an artistic cover of light. More and more it is growing to a slow but nevertheless impressive high power alternative to the fast running video projections. So you may say the large format slide projector is a tool for a specialized group of artists which produce monumental light artwork. Current specialists which are working with this type of projectors are e.g. [http://www.siegwulf-turek.at/english/ Prof. Siegwulf Turek] , [http://www.bartkresa.com Bart Kresa] , [http://www.casamagica.com Friedrich Förster and Sabine Weissinger] and [http://www.peterkozma.com Peter Kozma]
"History:" The first large format slide projectors were built in the middle of the 20th century as background projectors for theaters and opera houses. The artists [http://www.fanfaire.com/schneider-siemssen/index.html Prof. Schneider-Siemmsen] , Prof. Svoboda and Herbert von Karajan used the large format slide projectors as stage projectors in their artwork. In good cooperation with the technician Ing. Ludwig Pani they realized the first large format projections as an integrated part of their artwork. Since this starting era the large format slide projectors were developed to more light efficiency and flexibility to reach all fields of large image projection as there are stage, event, architectural and advertising projection. You also find some details of Large Format Slide Projectors in the book "Light Fantastic. The Art and Design of Stage Lighting" written by Max Keller and Johannes Weiß (ISBN 978-3-7913-3685-5).
"philosophical view:" The large format slide projectors use an artistic language, that is able to transport messages and contents to reach inner layers of human beings and so they decrease today's contemporary thrill and agitation. This opens a view into a more relaxed future.