page_title: Movie projector
section_title: Principles of operation
hierarchical_section_title: Movie projector / Principles of operation
caption_attribution_description: English: Movie projector mechanisms with parts identified. Photo taken 2005-06-20; text and lines added 2006-02-25.
context_page_description: A movie projector is an opto-mechanical device for displaying motion picture film by projecting it onto a screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras. Modern movie projectors are specially built video projectors.
caption: 35mm Kinoton FP30ST movie projector, with parts labeled. (Click thumbnail for larger text.)
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