| 摘要 |
<p>PROBLEM TO BE SOLVED: To extremely reduce cost increase and work man-hour increase by forming an optical reflector and an electronic wave reflector that is effective to an electronic wave in a frequency range of 50-100 GHz in a signle unit. SOLUTION: An optical reflector 1 and an electronic wave reflector 2 that is effective to an electronic wave in a frequency range of 50-100 GHz are formed in one unit and are mounted to a frame body 3. The reflector 2 is fabricated by a resin material and a surface treatment is made to a concave electronic wave reflection surface by metal. Light that is applied to the reflector 1 is directly reflected on the surface and at the same time incidence light is refracted by a prism that is formed on a rear surface and is emitted as reflection light. On the other hand, an electronic wave that is emitted from a radar device passes through the reflector 1, is reflected repeatedly by the reflector 2, passes through the reflector 1 again, and is reflected toward an emission side. A reflection wave from a vehicle with the reflector 2 is reflected with a large value over a wide range as compared with a reflection wave from a vehicle without any reflector 2.</p> |
