Light boxes with fresnel lenses

Claim 1

A light box adapted to produce continuously changing decorative patterns on a viewing screen, said box comprising: A. An enclosure having a front panel fabricated of clear plastic material having a series of concentric prismatic grooves formed on one face thereof to define a Fresnel lens serving as a viewing screen; B. A light source disposed within said enclosure to produce rays directed toward said front panel, and; C. a light modifying element interposed between said source and said screen, said Fresnel lens screen functioning to condense and magnify the modified light rays passing through said element whereby the resultant pattern presented on the screen and directly viewable thereon represents the interaction of said light modifying element and said lens and is brilliantly illuminated, said light modifying element including a rotating disc of transparent material which is formed to disperse light passing therethrough and a panel intermediate said disc and said front panel, said intermediate panel having a pebble-like surface defining a multitude of miniature lenses to disperse light.