| 摘要 |
PURPOSE: To improve the search accuracy of the optical transmitter/receiver and to improve the reception accuracy of signals. CONSTITUTION: In the case of optical radio transmission/reception to perform bidirectional optical communication between the first optical transmitter/receiver which is constituted by turning a light transmission part for transmitting optical signals at a narrow directional angle and a light reception part for receiving the optical signals at the narrow directional angle toward the same direction, and the second optical transmitter/receiver for which plural light emitting elements 43 equipped with a non-directional angle are arranged in the shape of a loop and a light receiving part 41 is arranged at the central part, the light transmission part of the second optical transmitter/receiver is composed of a first light emitting element group 43a arranged in the shape of the loop so that the optical axes of light emitting elements can be turned outside and a second light emitting element group 43b arranged in the shape of the loop so that the optical axes of light emitting elements can be turned inside, and the light source position of the first light emitting element group 43a is almost matched with the light source position of the second light emitting element group 43b. |
