Optical vortex 3D displays

摘要

A method for generating three dimensional (3D) displays. The method includes displaying a hologram that combines three (or more) images encoded into three (or more) different OAM channels, and the method also includes reflecting light from the displayed hologram to create a multichannel light beam. Then, the method involves decoding the multichannel light beam to decode and display the three encoded images. The decoding step includes displaying the three encoded images in decoded form in three view zones, three focal planes, or on three spaced-apart planes. The decoding is performed by a single decoding screen using holograms used for generating the three encoded images or is performed by three decoding screens configured based on a differing one of the holograms used for generating the three encoded images. The displaying of the hologram step includes operating a spatial light modulator (SLM) to display the hologram on a screen of the SLM.

主权项

1. A display system, comprising:
a display controller providing a set of three or more images; a projector projecting a light beam that is a combination of the three or more images; and a screen assembly displaying the three or more images on three or more screens positioned at three or more differing focal planes or in three or more view zones to provide an autostereoscopic display, wherein the projected light beam comprises a number of multiplexed beams each associated with a differing optical angular momentum (OAM) mode, wherein each of the multiplexed beams has a wavefront shaped as a helical vortex with a pitch differing from other ones of the multiplexed beams, wherein each of the OAM modes is associated with a differing one of the three or more images, wherein the projector comprises a spatial light modulator (SLM) displaying a combination computer-generated hologram, wherein the combination computer-generated hologram is formed by combining a set of computer-generated holograms each representing one of the three or more images, and wherein the projector further includes a light source directing a collimated light beam onto the SLM during the displaying of the combination computer-generated hologram thereby producing the projected light beam.