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Extended-viewing-angle waveguide near-eye display with a polarization-dependent steering combiner
Optics Letters
|May 16, 2020
Summary
A new waveguide-based near-eye display (WNED) uses a polarization-dependent steering combiner (PDSC) to double the viewing angle. This ultra-thin design enhances field of view for WNED technology.
Area of Science:
- Optics and Photonics
- Display Technology
- Optical Engineering
Background:
- Waveguide-based near-eye displays (WNEDs) offer compact form factors but often suffer from limited viewing angles.
- Conventional WNED designs face challenges in expanding the field of view (FOV) due to grating properties.
Purpose of the Study:
- To propose and demonstrate a novel waveguide-based near-eye display (WNED) with an extended viewing angle.
- To address the FOV limitations in WNEDs using a polarization-dependent steering combiner (PDSC).
Main Methods:
- Development of a novel eyepiece-combiner integrated with polarization gratings and optics.
- Utilizing the polarization-dependent steering combiner (PDSC) to control output beam paths.
- Fabrication and testing of a prototype WNED system.
Main Results:
- The proposed PDSC extends the viewing angle up to twice that of conventional structures.
- Achieved a horizontal field of view (FOV) of 33.2° in the prototype.
- The WNED system achieved an ultrathin profile of approximately 1.4 mm.
Conclusions:
- The polarization-dependent steering combiner (PDSC) effectively resolves the viewing angle limitations in waveguide-based near-eye displays (WNEDs).
- The proposed ultra-thin design is suitable for practical WNED applications, enhancing visual experience.
