See-Through Near-Eye Display with Built-in Prescription and Two-Dimensional Exit Pupil Expansion

Abstract

We propose a see-through near-eye display featuring an exit pupil expander (EPE), which is composed of two multiplexed slanted gratings. Via a two-dimensional expansion, the exit pupil (EP) is able to be enlarged up to 10 × 8 mm2. Besides, the prescription for correcting the refractive errors can be integrated as well. The design rules are set forth in detail, followed by the results and discussion regarding the efficiency, field of view (FOV), exit pupil, angular resolution (AR), modulation transfer function (MTF), contrast ratio (CR), distortion, and simulated imaging.

Keywords

• augmented reality
• near-eye display
• exit pupil expansion
• prescription
• slanted grating
• achromatic