Projector of slides

A projector of slides is a instrument optical making it possible to view Diapositive S by projection of the image on a white surface of big size (that it is a wall or a adapted screen). If its use were spread in the years 1950, the term diapositif-ve appears since 1892 in the French language with the Magic lantern because the projector of slides is directly the downward one by its principle of operation and its goals.

Description and operation

A projector of slides includes/understands four principal elements:
  1. a source of Light cooled by a Ventilator, which preferably cools also the slide
  2. reflectors and a condenser to uniformly direct the light towards the slide
  3. a housing for the slide, even a Pass-sight, simple or with basket
  4. an objective

Certain models are equipped with a system Autofocus making it possible as well as possible to focus the image on the screen.

The principal manufacturers of projectors of slides are Agfa, Kindermann, Kodak, Leica, Prestinox, Rollei and Simda.

These Projecteur S tends today to being replaced by Vidéoprojecteur numerical S, or projectors, producing a less clear image and still much more expensive than of the projectors of slides. On the other hand the digital image presents much more facilities than the slide to carry out a Diaporama, especially in dissolve-connected.

Types of projectors

  • projector with right basket
  • projector with round basket (for example Carousel)
  • projector stereo (simultaneously projects two slides with different polarizations; the sights then appear in relief with special glasses)
  • viewer of slides

See too

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