| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fine pore card to be optically read by forming fine pores difficult to be reproduced by a needle or the like at a base of a card or the like by utilizing a fine pore forming technology by a laser machining apparatus, giving ID information and an ID information checking apparatus. SOLUTION: Many fine pores are perforated through a card base plate obliquely at a specific angle by a laser beam, and the pores are arranged in a specific pattern to give information. A light is emitted from a light emitting element 6 obliquely at a specific angle, transmitted through the pores, and received by a light receiving element 7. Thus the information of the card is checked, dummy fine pores at an angle different from the pores of the specific angle are formed and the pattern of the pores of the specific angle is camouflaged.</p> |
