Abstract
A Fourier-transformed synthetic phase hologram for an auto-stereoscopic image display system is proposed and implemented. The system uses a phase-only spatial light modulator and a simple projection lens module. A modified iterative Fresnel transform algorithm method, for the reconstruction of gray-level quantized stereo images with fast convergence, high diffraction efficiency and large signal-to-noise ratio is also described. Using this method, it is possible to obtain a high diffraction efficiency(~90%), an excellent signal-to-noise ratio(> 9.6dB), and a short calculation time(~3min). Experimentally, the proposed auto-stereoscopic display system was able to generate stereoscopic 3D images very well.
Highlights
There have recently been substantial efforts to develop three-dimensional (3D) display systems
We propose, for the first time to our knowledge, and implement a Fourier-transformed synthetic phase hologram for an auto-stereoscopic image display system using a phase-only spatial light modulator (SLM) and a simple projection lens module
We proposed and implemented an auto-stereoscopic method that combines and synthesizes phase holograms for the reconstruction of gray-level stereo images
Summary
There have recently been substantial efforts to develop three-dimensional (3D) display systems. Fourier transform holograms (FTHs) provide an excellent design feasibility and make the most efficient use of the hologram space-bandwidth product(i.e., a minimal size of hologram is used to reproduce the object information). They have a robustness with respect to damage, such as localized defects and degradation of the hologram. Phase holograms have been researched and developed because of their high diffraction efficiency, easy of fabrication, and flexibility for optical information processing This design of a phase hologram satisfying the specified optical function has a combinatorial optimization problem. This modified IFTA is used in implementing a Fouriertransformed synthetic phase hologram for an auto-stereoscopic image display system
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