Wavelength-multiplexed multi-focal-plane seethrough near-eye displays

Area of Science:

• Optics
• Display Technology
• Human-Computer Interaction

Background:

• Near-eye displays (NEDs) often suffer from the vergence-accommodation conflict (VAC), which limits visual realism and can cause discomfort.
• Existing solutions for VAC often involve complex space- or time-multiplexing techniques, increasing device bulk and cost.

Purpose of the Study:

• To demonstrate a multi-focal-plane see-through near-eye display that effectively provides focus cues.
• To mitigate the vergence-accommodation conflict without resorting to space- or time-multiplexing.
• To present a dual-focus projection module for waveguide-type augmented reality (AR) devices.

Main Methods:

• Implementation of a multi-focal-plane see-through near-eye display architecture.
• Utilizing wavelength multiplexing as the core technology for depth separation.
• Incorporating a spectral notch filter as the wavelength-sensitive depth separation element.
• Development of a dual-focus projection module for waveguide AR systems.

Main Results:

• Successful demonstration of a near-eye display with effective focus cues through wavelength multiplexing.
• Mitigation of the vergence-accommodation conflict without space- or time-multiplexing.
• Presentation of a functional dual-focus projection module for waveguide AR devices.

Conclusions:

• Wavelength multiplexing offers a viable and effective solution for providing focus cues in see-through near-eye displays.
• The proposed design successfully addresses the vergence-accommodation conflict, enhancing visual comfort and realism in AR.
• The developed dual-focus projection module advances the capabilities of waveguide-type AR systems.