Wide viewing angle dynamic holographic stereogram with a curved array of spatial light modulators

Area of Science:

• Optics and Photonics
• Display Technology
• Holography

Background:

• Achieving wide viewing angles in digital holographic displays is challenging.
• Previous methods required extremely large planar spatial light modulators (SLMs), where paraxial approximations fail.
• Existing systems struggle to balance viewing angle width with display capabilities.

Purpose of the Study:

• To propose a novel dynamic holographic stereogram design using a curved array of SLMs.
• To overcome the limitations of planar SLMs in achieving wide viewing angles.
• To simplify optical structure and reduce light power loss in holographic displays.

Main Methods:

• A curved array of SLMs is employed to increase data points and reduce spatial bandwidth per SLM.
• Each SLM displays local angular spectra of the object wave, based on holographic stereogram principles.
• SLMs are reformed to simplify optics and minimize light power loss, effectively acting as sub-SLMs.

Main Results:

• The proposed design achieves a 22.8-degree viewing angle for digital holographic displays.
• Scalability in viewing angle is significantly improved.
• Light power loss is substantially reduced compared to conventional methods.

Conclusions:

• The curved SLM array offers a scalable solution for wide-angle holographic displays.
• This novel design enhances dynamic holographic stereogram performance.
• The system provides a practical approach to high-quality digital holographic imaging.