| 摘要 |
PURPOSE:To execute exactly a vehicle guidance, by providing a photodetector being long in a vehicle direction, also turning a laser emitting body in the horizontal direction in a constant period by a laser light source, and simultaneously, rocking it in the vertical direction, too in a constant period. CONSTITUTION:A laser light source 1 is provided on a prescribed position A, a laser beam for scanning the horizontal face is emitted from the light sourece 1, and modulation is executed so that information indicating the light emitting direction is loaded on the laser beam in the horizontal direction. On the other hand, three photodetectors 3- which are placed in one line in every constant period are provided on a vehicle 2 being a moving body. These photodetectors 3- have a photodetecting face being long in the vertical direction, respectively, and are capable of photodetecting the laser beam in all directions regarding the horizontal direction. When the laser beam scans positions B, C and D of those photodetectors 3-, the laser beam is photodetected and demodulated, by which light emitting azimuth angles theta1, theta2 and theta3 of the laser beam are detected. |
