PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY
Toy car being filmed through a screen used in the glasses-free 3D viewing system designed by the French inventor Pierre Allio. Called alioscopy, the system is similar to other 3D displays in that it uses two overlapping images to make the brain see a three-dimensional image. Instead of glasses being used to view the results, the optical part of the system is the screen itself. It is the rippled surface of the screen (seen here) that combines the two images, forming the desired 3D effect.
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