Abstract: An infrared sensor cover includes a decorative layer, a transparent first base, and a transparent second base. The decorative layer includes a first surface and a second surface opposite the first surface. The first base is made of a resin molded body and disposed on the first surface of the decorative layer. The second base is made of a resin molded body and disposed on the second surface of the decorative layer. An absolute value of a difference between refractive indices of a first resin material of the first base and a second resin material of the second base is less than or equal to 0.05. An absolute value of a difference between heat deflection temperatures of the first resin material and the second resin material is greater than or equal to 15 degrees.

Abstract: A radio wave transmissive cover is arranged in a path of a radio wave of a millimeter wave radar device. The cover includes a transparent member, which serves as the surface of the cover, and an ornamental layer, which is formed on the rear surface of the transparent member. The transparent member is formed from polyester copolymerized polycarbonate.