Large-format slide projector: Difference between revisions

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{{UnreferencedMore citations needed|date=DecemberOctober 20122024}}

[[File:Ravensburg Konzerthaus PANI-Projektor 01.jpg|thumb|PANI-Projektor, a large-format slide projector in the [[Ravensburg]] [[concert hall]]]]

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,The itlight is necessary tosource usegenerates a largelot slideof formatheat toeven protectwhen the slidefiltered materialto fromonly overheatingvisible duringlight; the projectionprojected process (even when the lighttransparency is filteredprotected tofrom onlyoverheating visibleby lightthe andheat thebeing slidedistributed isacross cooledits withlarge strongarea, slideand 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 solarge enormousenough thatto itproject is possible to coveronto whole buildings with an artistic cover of light.

==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 was offering in a catalog a 2000w slide projector using 4.75"x 4.75" (12x12cm) slide or a scroller for film strip of the same size. They will produce a 5000w model no long after this first. The artists [[Günther Schneider-Siemssen]],<ref>{{cite web|url=http://www.fanfaire.com/schneider-siemssen/index.html|archive-url=https://web.archive.org/web/20120210022744/http://www.fanfaire.com/schneider-siemssen/index.html|date=c. 2008<!--copyright date-->|archive-date=10 February 2012|title=The Cosmic Space of Gunther Schneider-Siemssen, stage set designer |url-status=usurped|publisher=Fanfaire.com }} {{Deadlink|date=April 2024}}{{Failed verification|date=April 2024}}</ref> and Professor Svoboda used the large format slide projectors as stage projectors in their artwork. In good cooperation with the technician Ing. Ludwig Pani, they improved large-format slide projectors for stage, and realized the first large format projections as an integrated part of their artwork.

==Manufacturers==