ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,523, issued on March 17, was assigned to FUJIFILM Corp. (Tokyo).
"Optical element and image display apparatus" was invented by Hiroshi Sato (Minami-ashigara, Japan) and Yukito Saitoh (Minami-ashigara, 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 b...