Patent ID: 11947142
Assignee: FUJIFILM CORPORATION
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 5:
6. The optical film according to claim 4,
wherein an angle formed by the longitudinal direction of the elongated optical film and the in-plane slow axis of the optically anisotropic layer (A) is 5° to 50°,
a twisted angle of the twist-aligned liquid crystal compound in the optically anisotropic layer (B) is 90°±30°,
upon being observed from the optically anisotropic layer (B) side toward the optically anisotropic layer (A) side, in a case where the in-plane slow axis of the optically anisotropic layer (A) rotates clockwise by 5° to 50° with reference to the longitudinal direction of the elongated optical film, the in-plane slow axis on the surface of the optically anisotropic layer (B) opposite to the optically anisotropic layer (C) side rotates clockwise with reference to the in-plane slow axis on the surface of the optically anisotropic layer (B) on the optically anisotropic layer (C) side, and
upon being observed from the optically anisotropic layer (B) side toward the optically anisotropic layer (A) side, in a case where the in-plane slow axis of the optically anisotropic layer (A) rotates counterclockwise by 5° to 50° with reference to the longitudinal direction of the elongated optical film, the in-plane slow axis on the surface of the optically anisotropic layer (B) opposite to the optically anisotropic layer (C) side rotates counterclockwise with reference to the in-plane slow axis on the surface of the optically anisotropic layer (B) on the optically anisotropic layer (C) side.