| 摘要 |
In an image display device of the present invention, an optical member has a support body, a base layer, and a wavelength selective reflective portion in that order. The wavelength selective reflective portion has wavelength selective reflectivity and has a cholesteric structure, the cholesteric structure forming a striped pattern of bright sections and dark sections in a cross-sectional view of the wavelength selective reflective portion when observed by a scanning electron microscope. The base layer absorbs non-visible light, and the wavelength region in which the wavelength selective reflective portion is selectively reflective overlaps the wavelength region of non-visible light absorbed by the base layer. The optical member has a high signal/noise ratio, which is a ratio of the reflectivity of the wavelength selective reflective portion and the reflectivity of the base layer in the wavelength region in which the wavelength selective reflective portion is selectively reflective. |
