| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser receiver to receive data modulated into a laser beam from a plurality of laser transmitters obtaining a constant data receiving region not depending on a distance from the laser transmitters regardless of extension of a pattern of the laser beam transmitted from the laser transmitters, that is, the constant data receiving region not depending on a rectilinear propagation property of data transmission and weather. SOLUTION: Whether the received data is valid or not is judged for example, as light receiving judgement of the laser beam in reference to a light receiving level on the laser receiver in addition to the distance in accordance with a relation between the distance and the light receiving level of the laser transmitters and the laser receiver for each of the previously found data receiving regions at the time of receiving the laser beam. Additionally, validity/invalidity of the data modulated into the laser beam is judged by referring to weather information in addition to the distance and the light receiving level at the time of receiving the laser beam. Furthermore, hitting judgement is carried out by referring to the light receiving level in addition to the distance in the case of using such the laser transmitter and the receiver for a virtual shooting practice system. COPYRIGHT: (C)2004,JPO
|
