REFLEX REFLECTOR AND LAMP DEVICE INCLUDING THE REFLEX REFLECTOR

A reflex reflector includes: a first resin layer and a second resin layer that are integrated together; a retroreflective interface that is an interface between the first resin layer and the second resin layer, and a retroreflective uneven surface, wherein a refractive index of the first resin layer is greater than a refractive index of the second resin layer; and an islands-shaped metal layer that is provided on the retroreflective interface and capable of transmitting radar wave from a radar unit, wherein a dielectric constant difference between the first resin layer and the second resin layer is within 5%.