Epidiascope

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Epidiascopes (from ancient Greek επί epi "on", δία dia "through, through" and σκοπεῖν skopein "look", for example: "See-through device") are projectors that can be used both as top- light projectors ( episcopes ) and back-light projectors (here as Slide projectors) can be used. In the epidiascope shown on the left, the large upper lens is used for the episcopic projection of a template to be inserted into the device from below. The (large format) slides are inserted between the housing and the lower lens.

Well-known manufacturers are / were for example Ed. Liesegang , Leitz or Hensoldt . Just like episcopes, epidiascopes have often been replaced by video projectors today .

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  Hensoldt -Epidiaskop with the projection lenses Walkar and Dialyt

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  Historical epidiascope from Ed. Liesegang

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  Projection lens Diarectim of VEB Rathenower Optische Werke for a GDR epidiascope

See also

-skop

Individual evidence

1. ^ Kurt Tauber, Camera Museum: Leitz Großraum-Epidiaskop III S. Accessed on April 26, 2020 . 

Web links

• Pictures in the Leica Wiki
• Slide projectors and epidiascopes in dia-versium