Patent ID: 8684544

Claim:
A retroreflective member comprising a reflective layer and transparent microscopic beads, the retroreflective member giving a phase difference corresponding to a visible light wavelength to at least a part of incident light and recombining, emphasizing a light component having the visible light wavelength by interference, and returning coherent light having a visible light wavelength depending on the incident angle in the traveling direction of the incident light; the reflective layer including a light-transmissive interference layer; the interference layer having an optical layer thickness of 100 to 600 nm so as to generate an interference color having a visible light wavelength depending on the incident angle of light wherein a colored layer and a colorless transparent layer are provided below the interference layer and above the transparent microscopic beads; and wherein a reflective color resin layer, and a base member bonding adhesive layer are provided below the interference layer.