| 摘要 |
<p>In an original document size detecting arrangement, one or more pairs of a light emitting element (6) and a light receiving element (7) are located on both sides of the original document platform (5) so that the detection light emitted from the light emitting element (6) travels to the light receiving element (7) along the top surface of the original document platform (5) but spaced therefrom a predetermined value. Since the detection light travels along the surface of the original document platform (5), when an original document is placed on the platform (5), the detection light is interrupted by the original document. Detecting means is provided for detecting whether the detection light enters into the light receiving element or the detection light is interrupted so that the detecting means generate a detection signal showing the size of the original document.</p> |
