The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Dec. 13, 2022
Fujifilm Corporation, Tokyo, JP;
Fumitake Mitobe, Minamiashigara, JP;
Katsumi Sasata, Minamiashigara, JP;
Hiroshi Sato, Minamiashigara, JP;
Akiko Watano, Minamiashigara, JP;
Yukito Saitoh, Minamiashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
An optical element includes a light guide plate, an incidence portion, and an emission portion, in which the incidence/emission portion includes an Λdiffraction element having a diffraction period Λ, an Λdiffraction element having a diffraction period Λ, and an Λdiffraction element having a diffraction period Λ=1:1√2±0.015:1/2±0.015' is satisfied, an angle between periodic directions of the Λdiffraction element and the Λdiffraction element and an angle between periodic directions of the Λdiffraction element and the Λdiffraction element is 45° or 135° (±0.5°), and an angle between the periodic directions of the Λdiffraction elements in the incidence portion and the emission portion is any one of 0°, 90°, 180°, or 270° (±0.5°).