Abstract: A head-up display (HUD) system is described that makes it less possible that coloring is visually recognized on a windshield even with sunglasses worn, wherein the head-up display system includes an image projector configured to project an image; and a resin film configured such that the image from the image projector is projected on the resin film, wherein the resin film is a reflective plane, and is disposed in such a manner that the incidence plane where the maximum of the absolute value of a* and the maximum of the absolute value of b* satisfy the following formulae (1) and (2) is at 90±10° to a horizontal plane.

Abstract: An object of the present invention is to provide an optical material having a visual confirmation effect due to higher directivity of light reflection than a conventional optical material. The present invention provides a laminate having a multilayer laminated film in which 11 or more layers of a plurality of different thermoplastic resins are alternately laminated, wherein, with respect to light in a wavelength range of 400 to 700 nm and that is perpendicularly incident on an outer surface of the multilayer laminated film, the laminate has an average transmittance in the above wavelength range of 50% or more, and when average reflectances in a wavelength range of 400 to 700 nm with respect to S-wave light in the wavelength range, incident at angles of 20° and 70° with respect to the normal line of the outer surface of the film at azimuths ?n (n: 1 to 5), are given as Rs20(?n) and Rs70(?n), respectively, the laminate satisfies, at at least one azimuth ?n: Rs70(?n)?Rs20(?n)?50(%).

Abstract: Provided are a light source unit, a display device, and a film. The light source unit has a light source and a film, the light source has a light-emitting band in the 450-650 nm wavelength range, the film has a mean transmittance of 70% or higher for light in the 450-650 nm wavelength range from the light source and incident at an angle of 0° to the normal to the film surface, the film satisfies the relationship Rp20?Rp40<Rp70 with Rp70 being 30% or greater when Rp20, Rp40, and Rp70 represent the mean reflectance (%) for P waves in the 450-650 nm wavelength range for light from the light source incident at angles of 20°, 40°, and 70° to the normal to the film surface, and the light source and the film satisfy specific relationships. Lb(0°)/La(0°)?0.8??(1) Lb(70°)/La(70°)<1.