| 摘要 |
<p>A coin which has been put into a coin slot (104) rolls along a coin passage (106). Light projected by a planar floodlight projector (132) positioned in parallel to the coin passage (106) transmits through a half mirror (134) toward the coin passage. A reflected light from the coin rolling along the coin passage is reflected by the half mirror (134), is guided in parallel to the coin passage (106), and reaches an image pickup element (138) via a converging lens (136). The image information picked up by the image pickup element (138) is compared with the reference information to determine the authenticity of the coin which has been put in. If the coin is determined to be a fake coin, a gate is not opened, and the coin is returned. If the coin is determined to be a true coin, the gate is opened, and the coin is accepted as a true coin.</p> |
