Extended field of view in near-eye display using optically stitched imaging

摘要

An extended field of view (FOV) is provided by an exit pupil expander in a near-eye display system that uses a waveguide with multiple diffractive optical elements (DOEs) for in-coupling light, expanding the pupil in two directions, and out-coupling light to a system user's eye. Left and right in-coupling DOEs in-couple pupils respectively produced by a pair of imagers—one imager provides a left portion of the FOV and the other imager provides the right portion. The left portion and right portion of the FOV respectively propagate in a left and right intermediate DOEs which expand the pupil in a first direction and diffract light to an out-coupling DOE. The out-coupling DOE expands the pupil in a second direction, stitches the extended FOV together by combining the left and right portions of the FOV produced by the imagers, and out-couples the extended FOV to the user's eye.