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, NY. Hansen was an engineer at the Eastman Kodak Company. A patent for the rotary tray was granted in 1966 after a 1962 application by the Eastman Kodak Company.

The original concept for the carousel slide projector is credited to Italian-American Louis Misuraca, who brought his design to the Kodak company, and sold it for a lump sum. The first Kodak Carousel projector was targeted toward the consumer and carried the model designation '550'. In 1963, the first professionally-oriented model was marketed in Germany as the Model S, a professional model sold only in Germany. It was designed by Hans Gugelot and Reinhold Häcker for Kodak AG in Stuttgart and is in the permanent collection of the Museum of Modern Art.

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