Slide projector

A slide projector is an opto-mechanical device for showing photographic slides.

Christiaan Huygens's magic lantern was the earliest/oldest form of slide projector.
A 1960 slide projector
Light path

35 mm slide projectors, direct descendants of the larger-format magic lantern, first came into widespread use during the 1950s as a form of occasional home entertainment; family members and friends would gather to view slide shows. Reversal film was much in use, and supplied slides snapped during vacations and at family events. Slide projectors were also widely used in educational and other institutional settings.

Photographic film slides and projectors have mostly been replaced by image files on digital storage media shown on a projection screen by using a video projector or simply displayed on a large-screen video monitor.

A carousel slide projector. The example pictured is a Kodak Carousel model 4400, dating from the mid-1980s.

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This article uses material from the Wikipedia article Slide projector, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.