NEAR-TO-EYE DISPLAY WITH DIFFRACTIVE LENS

摘要

An eyepiece for a HMD includes a waveguide, an ambient light polarizer, and a wire grid polarizer with a diffraction lens having a lens function patterned into the wire grid polarizer. Polarized image light is guided between eye-ward and ambient sides of the waveguide from a display source to a viewing region of the waveguide where the polarized image light is directed out of the waveguide through the eye-ward side. The viewing region passes ambient light incident on the ambient side through to the eye-ward side. The ambient light polarizer is disposed adjacent to the ambient side to polarize the ambient light into polarized ambient light having a second polarization orthogonal to the first polarization. The wire grid polarizer is disposed adjacent to the eye-ward side along the viewing region. The wire grid polarizer is oriented to applying the lens function to the polarized image light via diffraction.