Abstract: An object is to provide an exposure method and an exposure device for obtaining a photo-alignment film where the accuracy of an alignment pattern is high, and a method of forming an optically-anisotropic layer. In a case where linearly polarized light is focused in a ring shape with an optical member and a film including a compound having a photo-aligned group is exposed, while rotating a polarization direction of the polarized light, the film and the optical member are relatively moved in a direction tilted with respect to an optical axis of the optical member.

Abstract: Provided is an exposure method and an exposure device for obtaining a photo-alignment film where the accuracy of an alignment pattern is high, and a method of manufacturing an optically-anisotropic layer. Provided is an exposure method in which linearly polarized light is focused in a ring shape with an optical member to expose a film including a compound having a photo-aligned group, the method including: an exposure step of relatively moving the film and the optical member in an optical axis direction of the optical member while rotating a polarization direction of the linearly polarized light.

Abstract: There are provided a projection image-displaying member, a windshield glass, and a head-up display system in which both high visible light transmittance and good tint of a screen image displayed are achieved. The projection image-displaying member has a selectively reflecting layer that wavelength-selectively reflects light. The selectively reflecting layer has a maximum reflectivity in a wavelength range of 700 to 850 nm at an incidence angle of 5° and has a peak with a reflectivity of 15% or more in a wavelength range of 470 to 540 nm. The selectively reflecting layer further has two or more peaks of reflectivity in a wavelength range of 540 to 700 nm.

Abstract: There are provided a projection image-displaying member, a windshield glass, and a head-up display system in which both high visible light transmittance and good tint of a screen image displayed are achieved. The projection image-displaying member has a selectively reflecting layer that wavelength-selectively reflects light. The selectively reflecting layer has a maximum reflectivity in a wavelength range of 700 to 850 nm at an incidence angle of 5° and has a peak with a reflectivity of 15% or more in a wavelength range of 470 to 540 nm. The selectively reflecting layer further has two or more peaks of reflectivity in a wavelength range of 540 to 700 nm.

Abstract: A half mirror includes an observation surface, a molded resin layer, and a polarization reflection plate in this order, at least one high-Re retardation film is included between the observation surface and the polarization reflection plate, a total front phase difference of the high-Re retardation film is 3,000 nm or greater, and a first high-Re retardation film is included as the high-Re retardation film between the observation surface and the molded resin layer.