ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,552, issued on Nov. 18, was assigned to FUJIFILM Corp. (Tokyo).
"Optical element and image display apparatus" was invented by Hiroshi Sato (Minamiashigara, Japan) and Yukito Saitoh (Minamiashigara, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are an optical element and an image display apparatus that display an aerial image, in which the total volume of the apparatus is small, a reduction in size can realized, and a scenery can be recognized. The optical element includes: a light guide element including a light guide plate, an incidence diffraction element, and an emission diffraction element, the incidence diffraction element being...