Abstract
In this article, we propose a reference light wave multiplexing scheme to increase the information capacity of computer-generated holograms. The holograms were generated by different reference light waves and superimposed together as a multiplexed hologram. A modified Gerchberg–Saxton algorithm was used to improve image quality, and different images could be reconstructed when the multiplexed hologram was illuminated by corresponding reference light waves. We performed both numerical simulations and optical experiments to demonstrate the feasibility of the proposed scheme. Numerical simulations showed that the proposed method could reconstruct multiple images successfully by a single multiplexed hologram and optical experiments are consistently good with numerical simulations. It is expected that the proposed method has great potential to be widely applied in holographic displays in the future.
Highlights
Multiplexing for Holographic Display.Holographic display is regarded as the ideal three-dimensional (3D) display technology because it offers all the visual information human eyes require [1,2]
Position multiplexing has been used in Computergenerated hologram (CGH), where different images can be reconstructed at different positions by a multiplexed CGH (MCGH) [27,28]
MCGH, which is theas: equivalent of changing the plane reference ence light wave is added to the MCGH, which is the equivalent of changing the plane wave to a cylindrical or spherical reference light wave
Summary
Curvature multiplexing [29,30] has been utilized to increase information capacity, where different images can be reconstructed at the same or different positions by changing the curvature of a MCGH. This method exhibits strong crosstalk noise in reconstructed images. Methods that can increase information capacity further and reconstruct multiple images are strongly required in the development of holographic display. The iteration algorithm is the most widely used method for phase-only CGH calculation and has achieved considerable success in less convergence time and clear reconstruction. Numerical simulations and optical experiments were performed to validate the proposed method
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