Volumetric aerial three-dimensional display based on heterogeneous imaging and image plane scanning

A volumetric display system that creates a distortion-free three-dimensional (3D) image in midair using a novel imaging system is reported. A roof mirror array forms an aerial real image with an image deformation by retroreflection. The image deformation can be reduced by constructing an imaging system using two roof mirror arrays arranged in a parallel manner. A cross-sectional image of a 3D object is formed by the proposed imaging system in midair and swept by a galvanometer mirror scanner to create a 3D volume image. An aerial 3D volume image formation without the image deformation was confirmed by an experimental volumetric display system.