Wikipedia: Each image is sliced into strips, which are then interlaced with one or more other images. These are printed on the back of a piece of plastic, with a series of long, thin lenses molded into the other side. The lenses are lined up with each image interlace, so that light reflected off each strip is refracted in a slightly different direction, but the light from all strips of a given image are sent in the same direction (parallel). The end result is that a single eye or camera looking at the print sees a single whole image, but an eye or camera with a different angle of view will see a different image.
A printing technology that uses a lenticular lens to create an illusion of depth or animation when the image is viewed at different angles.
Wikipedia:
Each image is sliced into strips, which are then interlaced with one or more other images. These are printed on the back of a piece of plastic, with a series of long, thin lenses molded into the other side. The lenses are lined up with each image interlace, so that light reflected off each strip is refracted in a slightly different direction, but the light from all strips of a given image are sent in the same direction (parallel).
The end result is that a single eye or camera looking at the print sees a single whole image, but an eye or camera with a different angle of view will see a different image.