| 摘要 |
<p>An apparatus for reading optical recording cards is provided with a line sensor (10) for reading the information on an optical recording card (1), in which the information is recorded in the form of a plurality of parallel tracks in an optically readable state on a recording medium (1A), by means of the light emitted from a light source (4) to the tracks and reflected thereon; a cylindrical lens (11) supported pivotably between the optical recording card (1) and line sensor (10); and a circuit for detecting an azimuthal error occurring between the tracks and line sensor (10). In this apparatus, the cylindrical lens (11) is turned by an output from the azimuthal error detecting circuit to correct an azimuthal error. An azimuthal error of an image of an auxiliary track on the optical recording card, which is projected on the line sensor, can thus be corrected smoothly and speedily with a high accuracy by the pivotal movement of the cylindrical lens (11).</p> |
