| 摘要 |
<p>An optical coin detector uses the spatial and/or temporal periodic modulation (51, 52) imparted to incident light which is reflected from the coin (m) due to the combined effect of the stamping on the coin (m) and its motion past a detection area. Detection of modulated, reflected light takes part from the end edge of the coin (m) or from one of its side surfaces, and is effected by using one light sensitive detector (LD) with an adapted line screen pattern (R) arranged in front of the detector, or by using a detector array.</p> |
