Foveated near-eye display for mixed reality using liquid crystal photonics

Area of Science:

• Optics
• Photonics
• Mixed Reality Displays

Background:

• Foveated near-eye displays are crucial for immersive mixed reality but face challenges in optical system compactness.
• Liquid crystal photonics offers potential solutions for advanced display technologies.

Purpose of the Study:

• To introduce and demonstrate a novel method using polarization optics and liquid crystal photonics to improve foveated near-eye display performance.
• To develop a compact optical system for enhanced mixed reality experiences.

Main Methods:

• Implementation of two display modules: one for peripheral vision and one for foveal vision.
• Peripheral display utilizes a polarization selective lens (PSL) and polarization selective diffuser (PSD) for an 80° field of view.
• Foveal holographic display employs a spatial light modulator (SLM) and volume grating lens for high-resolution focus cues.

Main Results:

• A benchtop prototype successfully demonstrated the proposed optical design.
• Achieved an 80° diagonal field of view for peripheral vision.
• Generated high-resolution (30+ cycles/degree) foveal vision with accurate focus cues within a 15° by 15° field of view.

Conclusions:

• The integration of polarization optics via liquid crystal photonics offers a viable approach to compact and high-performance foveated displays.
• The novel optical design, incorporating volume gratings with polarization selectivity, advances mixed reality display technology.