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Single-image-source binocular waveguide display based on polarization volume gratings and lenses
Optics Letters
|April 14, 2023
Summary
This study introduces a novel polarization-dependent binocular waveguide display for augmented reality (AR). It uses polarization volume lenses and gratings to deliver independent images to each eye, enabling compact and lightweight AR near-eye displays.
Area of Science:
- Optics and Photonics
- Display Technology
- Augmented Reality Systems
Background:
- Waveguide displays are a key technology for augmented reality (AR) systems.
- Existing AR waveguide displays often require complex collimation systems.
- There is a need for compact, lightweight, and efficient binocular AR displays.
Purpose of the Study:
- To propose a novel polarization-dependent binocular waveguide display.
- To demonstrate independent image delivery to each eye using polarization.
- To enable a compact and lightweight AR near-eye display solution.
Main Methods:
- Utilized polarization volume lenses (PVLs) as input couplers and polarization volume gratings (PVGs) as output couplers.
- Employed a single image source with modulated polarization states.
- Leveraged liquid crystal elements for polarization control and image modulation.
Main Results:
- Achieved polarization-dependent light delivery to independent eyes.
- Eliminated the need for an additional collimation system due to PVL capabilities.
- Demonstrated independent and accurate image production for both eyes by modulating image source polarization.
Conclusions:
- The proposed design offers a compact and lightweight solution for binocular AR near-eye displays.
- The use of PVLs and PVGs simplifies the display system architecture.
- This approach enhances efficiency and polarization selectivity for AR applications.
