US Patent 11385595 Refractive optical screen and floating hologram system using same

Disclosed are a refractive optical screen and a floating hologram system using the same. The refractive optical screen is a refractive optical screen which refracts incident light beams and adjusts a travelling direction of the light beams, and includes a prism array in which a plurality of prisms refracting one or more light beams toward a viewing direction of a viewer located at the front side of the refractive optical screen is arranged in a line, and one or more virtual images generated by the one or more refracted light beams simultaneously form a floating hologram arranged in the viewing direction.