| 摘要 |
PURPOSE:To prevent a light from being converged to a focus of a concaved curved face without disturbing reflection of a radio wave by constituting a radio wave reflecting layer having the concaved curved face with a fiber sheet such as aluminum-coated glass and coating its rear face and the concaved face with a resin having an excellent light transmittivity. CONSTITUTION:A reinforcement layer 2 is arranged to the rear face of the radio wave reflecting layer 1 having the concaved curved face to form a conventional parabolic face or offset parabolic face. Said reflecting layer 1 is made of a radio wave reflecting member made of glass fiber sheet or carbon fiber sheet applying aluminum-coating to a fiber raw face and as the sheet, a polyester resin is used, in which fiber elements are knitted in mat, cloth or net and which reflects a radio wave but transmits to some degree a light. Further, as to the reinforcement layer 2 at the rear face and a coated layer 3 at the concaved face side a synthetic resin having an excellent light transmittivity is used. Through the constitution above, the light is reflected irregularly at the concaved face of the reflector without disturbing the reflection of the radio wave so as to prevent the light from being converged to the focus of the concaved curved face. |
