| 摘要 |
PURPOSE:To obtain a light and compact tracking receiving equipment for the communication of spatial propagation light. CONSTITUTION:The spot B of receiving light A made incident upon a photodetecting face 11 of a photodetecting element in a light receiver 4 through a lens 3 is converged into the periphery of the circular photodetecting face 11 and the spot B is rotated around the face 11 by a mirror driving mechanism including mirrors 1, 2, a driving circuit 6 and the light receiver 4. The center of rotation is controlled so as to be moved to the center of the face 11. |
