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A carousel slide projector. The example pictured is a Kodak Carousel model 4400, dating from the mid-1980s. A carousel slide projector is a slide projector that uses a rotary tray to store slides, used to project slide photographs and to create slideshows. It was first patented on May 11, 1965, by David E. Hansen of Fairport, New York.
When blocking the light, the exposed portion of the film is advanced, and another, pristine frame is moved into position. The spinning disc then exposes the new frame of film. The nature of light-sensitive film requires a shutter to block the light and prevent smearing of the image as the film is advanced through the camera. Digital sensors do ...
The diagram shows the mirror system and the synchronized engine that displays light from the high speed video projector. Spinning mirror systems are used to build interactive 3D graphics and autostereoscopic visuals visible to multiple simultaneous viewers, since a different view can be perceived by each viewer depending on the angle of vision.
A stereopticon is a slide projector or relatively powerful "magic lantern", which has two lenses, usually one above the other, and has mainly been used to project photographic images. These devices date back to the mid 19th century, [ 1 ] and were a popular form of entertainment and education before the advent of moving pictures .
The magic lantern, also known by its Latin name lanterna magica, was an early type of image projector that used pictures—paintings, prints, or photographs—on transparent plates (usually made of glass), one or more lenses, and a light source.
On 6 November 1894, Anschütz patented a projector with two intermittently rotating large disks and continuous light. On 25, 29 and 30 November 1894, he introduced his new device with two linked discs projecting the moving images on a 6 by 8 m (20 by 26 ft) screen in the darkened Grand Auditorium of a Post Office Building in Berlin.
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