US Patent 9829612 Diffraction grating based 3-D display

A three-dimensional display system and methods for forming 3D images are disclosed. In one version, a diffusion screen is formed at a predetermined location1 of a set of predetermined locations 1-n within an image chamber. The diffusion screen is illuminated with visible light indicative of a cross-sectional image1 of a set of a plurality of cross-sectional images 1-N of a three-dimensional image at the predetermined location1 within the image chamber. The diffusion screen is erased and the method is repeated for cross-sectional images 2-N and predetermined locations 2-n of the three-dimensional image at a scan rate sufficient to produce a representation of the three-dimensional image in the image chamber.