| 摘要 |
<p>PURPOSE:To make an operation convenient by nearly equalizing the limit surface of a detection device in a light emitting direction and the limit surface of an identification device in a light emitting direction in usual holding state and providing a light receiving element in order that a light receiving range is made larger than a light emitting range in each of the detection device and the identification device. CONSTITUTION:The detection device 2 is set near a ceiling surface 1 in order that the central axis of the light receiving range has an angle Y against a vertical surface and the limit surface of the signal light emitting range is nearly as same as the limit surface of the signal light emitting range of an identification card 3 in the usual holding state, shown like a dotted line, and the central axes (alternate long and short dash line) of the respective light emitting ranges are nearly parallel. And the light receiving elements of the detection device 2 and the identification card 3 are provided in order that the signal light receiving range is made larger than the light emitting range of the light emitting element. If the identification card is held in a usual state, the light receiving and emitting surface of the identification card need not be faced to the detection device every transmission reception and the operation is made convenient.</p> |
