| 摘要 |
<P>PROBLEM TO BE SOLVED: To form an appropriate and efficient optical system between a mobile unit and lighting fixtures. <P>SOLUTION: An illumination light side light receiving unit 13 comprises a light receiving sensor 14, and three pilot light sources 16A, 16B, 16C. The pilot light sources 16A, 16B, 16C configure a pilot light emitting group 16. Central points of the pilot light source 16A, the light receiving sensor 14, and the pilot light source 16B are respectively located on a virtual straight line L1, and a central point of the pilot light source 16C is located on a virtual straight line L2 orthogonal to the virtual straight line L1. Through the configuration above, the mobile unit side can easily determine the position and the direction of the light receiving sensor at the illumination side, and it is possible to form the proper and efficient optical system (optical axis, luminance setting or the like) between the mobile unit and the lighting fixtures. <P>COPYRIGHT: (C)2008,JPO&INPIT |
