ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,393,022, issued on Aug. 19, was assigned to CANON K.K. (Tokyo).
"Optical system and display apparatus" was invented by Akira Yamamoto (Saitama, Japan) and Keiichiro Ishihara (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to optical system and display apparatus. An optical system guides a light beam from a display element to an exit pupil. The optical system includes a first optical element including a transmission surface, a reflection-transmission surface, and a reflection surface, and a negative lens including a concave surface on an exit pupil side. The light beam from the display element heads toward th...