ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,455, issued on Oct. 28, was assigned to GOOGLE LLC (Mountain View, Calif.).

"Lightguide integrity monitoring in a head mounted display" was invented by Josh Moore (Elora, Canada), Kaveh Moussakhani (Toronto), Jaehong Choi (Waterloo, Canada) and Daniel Adema (Kitchener, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "Lightguide integrity monitoring in a head mounted display is facilitated by monitoring an elongated conductor disposed proximal a lightguide in an optical combiner. When a sufficient change in one or more electrical characteristics of the elongated conductor is detected, a signal indicating that the lightguide has been damaged may ...