Spatial bandwidth product expansion method by diffraction superposition for holographic display

Abstract

A spatial bandwidth product expansion method based on diffraction superposition is proposed. Different from time-multiplexing techniques and spatial light modulator array based techniques, the proposed method divides the target 3D scene into multiple parts according to their positions. Computer-generated holograms (CGHs) are calculated from corresponding parts. Each part of the 3D scene is contributed by the corresponding CGH. By superposing reconstructions of all CGHs, the entire 3D scene can be perceived. The evaluation of peak signal to noise ratio has verified the effectiveness of the proposed method.