Transparent Eye Illumination Layer for AR Glint Tracking

The patent extracts and removes the polarizing beam splitter component from the optical system, replacing it with alternative optical elements such as non-polarizing beam splitters or direct LED illumination paths. This extraction eliminates the need for polarizing optics while maintaining light direction control, thereby reducing overall system size.

The patent employs optical elements that perform multiple functions: waveguides that both guide and out-couple light, optical elements that simultaneously serve as structural supports and optical paths, and illumination systems that integrate multiple lighting functions into single components. This multi-functionality reduces the number of separate components needed, decreasing system size while maintaining illumination control.

The patent merges virtual and real-world visual inputs by using transparent or translucent waveguide optics that allow simultaneous viewing of both virtual image content and the real-world environment. The optical system combines multiple light paths (virtual image light and real-world light) into a single optical channel, enabling users to perceive both layers of information concurrently with enhanced virtual image clarity while maintaining real-world awareness.

The patent adds a new dimensional layer of virtual imagery overlaid on the existing real-world visual field. Rather than blocking the real-world view, the system projects virtual images into a different optical dimension through waveguide technology, allowing users to access virtual content while maintaining awareness of the real environment through the same optical path.

The patent utilizes waveguide optics that fold and redirect optical paths through multiple internal reflections and refractions within a thin planar structure. This allows the optical path length to extend significantly longer than the physical thickness of the device, enabling sufficient optical path length for image projection and waveguide function while maintaining a compact, portable form factor.

The patent implements nested optical paths where light travels through multiple layered waveguides and optical elements stacked within a compact volume. The optical path is folded back and forth through nested structures, allowing extended optical path length to be contained within a small physical footprint, thereby maintaining portability while achieving the required optical path length for proper image formation.