US Patent 10012841 Advanced retroreflecting aerial displays

A superstereoscopic image retroreflecting display that enables the formation of a real image in free space includes a first light source that generates a first light output; a lenticular lens optically coupled to the first light source that, with the first light source, generates a first light output having viewing angle dependency; a first beam splitter module; and a retroreflector module opposite the first light source.