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:
May. 05, 2026
Filed:
May. 17, 2024
Fujifilm Corporation, Tokyo, JP;
Kazuya Hisanaga, Minamiashigara, JP;
Yukito Saitoh, Minamiashigara, JP;
Yujiro Yanai, Minamiashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
Provided is a transmissive liquid crystal diffraction element that can diffract different polarized light components in the same direction and can maintain a polarization state during incidence. The transmissive liquid crystal diffraction element includes: first and second optically-anisotropic layers each of which has a liquid crystal alignment pattern in which an orientation of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction; and two retardation layers that are disposed on a side of the second optically-anisotropic layer opposite to the first optically-anisotropic layer and between the first optically-anisotropic layer and the second optically-anisotropic layer, respectively, in which a rotation direction of the optical axis in the liquid crystal alignment pattern of the first optically-anisotropic layer is opposite to that of the second optically-anisotropic layer, a single period of the liquid crystal alignment pattern of the first optically-anisotropic layer is the same as that of the second optically-anisotropic layer, the retardation layer is a positive C-plate or an O-plate, and the positive C-plate satisfies Expression (1).