| 摘要 |
An information-reading method employs an optical card including, a data section made by a linear information track, an address section for storing an address of the information track, and a guide section located adjacent to the address section and scanned before reading the address section. The address section and guide section are located at each end of said data section. The address and guide sections located at one end of the data section and the address and guide sections located at the other end of the data section are arranged in the same order in one scanning direction of the information track. The method comprises the steps of reading two addresses out of the address sections, by scanning the information track in the one scanning direction, and comparing the two addresses with each other, to thereby detect a tracking error.
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