ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,541,048, issued on Feb. 3, was assigned to Canon K.K. (Tokyo).
"Observation optical system and display apparatus" was invented by Yosuke Sakai (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An observation optical system is configured to guide light from a display device to an observation side. The observation optical system includes a lens having a first half-transmissive reflective surface, and a second half-transmissive reflective surface disposed closer to the display device than the first half-transmissive reflective surface. The light from the display device transmits through the second half-transmissive reflective surface, is reflec...