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(11) | EP 0 996 098 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Coin testing apparatus and method |
| (57) A method of coin testing is provided in which a laser beam (13) is directed onto
a face of a coin (4) and a laser detector (3) is used to detect where the laser beam
is intercepted by the coin and where the laser beam is not intercepted by the coin,
so as to obtain an indication of a characteristic of the face of the coin. The characteristic
of the coin is used to identify the coin. The invention also relates to an apparatus
for coin testing, which comprises a laser source (11) to direct a laser beam (13)
onto a face of a coin (4), a laser detector (3) for detecting where the laser is intercepted
by the coin and where the laser is not intercepted by the coin, and a signal-processor
(14) which obtains an indication, from an output of the laser detector (3), of a characteristic
of the face of the coin which is used to identify the coin. |