Three-dimensional light field fusion display system and coding scheme for extending depth of field

Light field display is considered as the most promising three-dimensional(3D) display technology, but its development is severely constrained by the shallow depth of field(DOF). In order to extend the DOF of light field display without affecting other viewing indicators, a 3D light field fusion display system is proposed in this paper. However, due to the problem of voxel superposition, the light field display contents cannot be correctly fused, which makes the display results inconsistent with the 3D scene captured. Through the analysis of the physical process of voxel superposition, a coding scheme which can make the contents of light field display fuse correctly is completed. Then the structural parameters of the system and the parameters of optical elements have been designed and a prototype has been developed. The experimental results of the prototype verify the correctness and effectiveness of the proposed coding scheme. The comparison of experimental images shows that the proposed system can significantly improve the display effect of 3D scenes with large DOF.