ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,393,017, issued on Aug. 19, was assigned to Canon K.K. (Tokyo).
"Ocular optical system and image display apparatus" was invented by Takashi Torii (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ocular optical system that guides light from a display element to an eye of an observer includes a first phase plate, a second phase plate, one or more lenses, and a polarization separation element configured to reflect first linearly polarized light and allow second linearly polarized light to pass therethrough in a polarization direction orthogonal to a polarization direction of the first linearly polarized light. The second phase plate is in...