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The Phenakistoscope

Around December 1832 Joseph Plateau created the phenakistoscope, Plateau noticed in some early experiments that when looking from a small distance at two concentric cogwheels turning fast in opposite directions made the optical illusion of a motionless wheel. Plateau placed a picture on the wheel and after he had spun it fast the picture appeared motionless. After multiple tests he made a movement in the picture and motion appeared.

The phenakistoscope usually comes in the form of a spinning cardboard disc connected to a handle. Around the disc's center are a series of pictures showing sequential phases of the animation. Small rectangular slits are spaced evenly around the end of the disc. The user would spin the disc and look through the moving slits at the images reflected in a mirror. Scanning the slits across the reflected images keeps them from simply blurring together, so that the user can see a rapid succession of images that appear to be a single moving picture.

WORK CITED

Information :https://en.wikipedia.org/wiki/Phenakistiscope

picture 1:  https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Optical_illusion_disc_with_somersaults_and_horseback_riding.gif/480px-Optical_illusion_disc_with_somersaults_and_horseback_riding.gif

picture 2: https://sites.google.com/site/stationforanimation/_/rsrc/1340276402049/history/phenakistoscope/Demoschijf.jpg?height=216&width=320