Enhancement of viewing angle of multi-stage projection-type integral imaging 3D display

As integral imaging has narrower viewing angles for three-dimensional reconstruction images,it can not be widely applied in three-dimensional display.To enhance the viewing angles of integral imaging,this paper develops a new three-dimensional integral imaging system with a larger view angle based on the multi-level projection technology.The system projects the element image array with different levels in parallel based on multi-projectors and obtains a construction image with a large viewing angle by three dimensional reconstruction.As compared with the conventional method with multi-axles,the proposed method has the advantages on its simply structure without other field lenses and stable system no vibration and noises.Furthermore,it is suitable for the large-scale integral imaging system.The optical experiment shows that the viewing angle of proposed integral imaging system with multi-projectors is ±35°,which is 2.92 times that of the conventional integral imaging system and enhances the viewing angle greatly.