| 摘要 |
A magnetic sensor comprises a bias magnetic field generating means and a magnetic detection element disposed on one side of the bias magnetic field generating means in a magnetic pole direction, and the magnetic sensor identifying a medium, that is a magnetic powder adhered medium or a magnetic film adhered medium, passing across the magnetic detection element on the side opposite to the bias magnetic field generating means. The magnetic detection element is capable of detecting variation in a magnetic field component parallel to a movement direction of the medium to be identified. A passage region of the medium includes a specific region in which a magnetic field increases when a distance from the magnetic detection element becomes larger in the magnetic pole direction. |
