It consists of a cylinder with slits cut vertically. The inner surface of the cylinder has a band with images from a sequence of pictures. As the cylinder spins, the user looks through the slits at the pictures across. The scanning of the slits keeps the pictures from blurring together, and the user sees a rapid succession of images, producing the illusion of motion.
There is much deliberation on when this technique was invented as there exists examples of similar ideas on ancient vases. The vase has a sequence of goats on the inside that seem to follow the zoetrope technique however this may be for decorative purposes and not intentionally as an animation.
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