US Patent Issued to Magic Leap on Sept. 8 for "Exit pupil expander with total internal reflection between wedge surfaces" (Finnish Inventor)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,318, issued on Sept. 8, was assigned to Magic Leap Inc. (Plantation, Fla.).

"Exit pupil expander with total internal reflection between wedge surfaces" was invented by Jyrki Sakari Kimmel (Tampere, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "An exit pupil expander (EPE) has entrance and exit pupils, a back surface adjacent to the entrance pupil, and an opposed front surface. In one embodiment the EPE is geometrically configured such that light defining a center wavelength that enters at the entrance pupil perpendicular to the back surface experiences angularly varying total internal reflection between the front and back surfaces such that...