Lenticular printing is a technology in which lenticular lenses are used to produce printed images with an illusion of depth, or the ability to change or move as they are viewed from different angles.
Close-up of the surface of a lenticular print
Berthier's diagram: A-B=glass plate, with a-b=opaque lines, P=Picture, O=Eyes, c-n=blocked and allowed views (Le Cosmos 05–1896)
Saturnalia 1973 LP with lenticular label that switches from "Magical love" to a logo.
Han-O-Disc manufactured for Light Fantastic with metal flake outside and Dufex process print within.