The Phenakistoscope and the Stroboscope

Plateauís optical device for the illusion of animated movement, the phenakistoscope (left), consisted of two disks. The disk containing the slots performs the function of a moving shutter, which was responsible for the phenomenon of flickering images. Stampferís stroboscope (right) consisted of only one disk: the drawings were placed between the slots on the side facing away from the viewer, who spun the disk while peering through the slots into a mirror.

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