ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,717,165, issued on Aug. 25, was assigned to Valve Corp. (Bellevue, Wash.).

"Diffractive-based optical system for head-mounted display device" was invented by Joshua Mark Hudman (Issaquah, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for providing an optical system in a head-mounted display (HMD) that is operable to modify virtual image light to correct for one or more vision conditions of a user's eyes. The optical system includes a left optical subsystem for the left eye and a right optical system for the right eye. Each optical subsystem includes at least one correction portion having a diffractive optical element assembly....