Full-parallax 3D light field display with uniform view density along the horizontal and vertical direction

For traditional integral imaging display systems with usual lens array, there is the same viewing angle in the horizontal and vertical direction. Due to usual display has vertically long sub-pixels, this sub-pixel shape makes the view density be lower in vertical direction than the horizontal one. Here, a clear full-parallax 3D light field display with uniform view density along the horizontal and vertical direction is demonstrated. The proposed 3D display system consists of a collimated backlight source, a 31.5-inch LCD with the resolution of 3840×2160, an aspherical cylindrical compression lens (ACCL) array and a holographic functional screen (HFS). The ACCL array is used to compress the vertical viewing angle to increase the view density in the vertical direction. After combining the collimated backlight, the aberration of the system is suppressed. Compared with traditional integral imaging display, the viewpoint density in the vertical direction is increased and the aliasing phenomenon is reduced. Experimental results show that a clear full-parallax light field 3D image can be achieved in the horizontal viewing angle of 81 degrees and the vertical viewing angle of 27 degrees. © 2020 Elsevier B.V.