Wide Field Of View Varifocal Near-Eye Display Using See-Through Deformable Membrane Mirrors

Area of Science:

• Optics and Photonics
• Human-Computer Interaction
• Display Technology

Background:

• Near-eye displays for augmented reality (AR) face challenges balancing accommodative depth cues, field of view, and resolution.
• Optimizing one display characteristic often compromises others, hindering AR system development.

Purpose of the Study:

• To present an integrated solution for AR near-eye displays that addresses the trade-offs between field of view, depth cues, and resolution.
• To introduce a novel gaze-tracked, varifocal near-eye display system.

Main Methods:

• The core innovation is a see-through, varifocal deformable membrane mirror for each eye, reflecting a display.
• These mirrors are controlled via airtight cavities to adjust focal power dynamically.
• A gaze tracker determines the target depth plane for the virtual image.

Main Results:

• The developed near-eye display achieves a wide 100° diagonal field of view.
• It demonstrates rapid depth switching capabilities, adjusting focus from 20 cm to infinity within 300 ms.
• Subjective experiments validated the prototype's effectiveness and potential.

Conclusions:

• The varifocal deformable membrane mirror approach effectively overcomes traditional design limitations in near-eye displays.
• This technology shows significant promise for enhancing the realism and user experience of see-through AR applications.
• The system's wide field of view and fast focus adjustment are key advantages for future AR development.