| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reader/writer that eliminates the interference between tags and influence due to electromagnetic wave disturbance by a metal of an article, on which an IC tag is attached by making the antenna of the reader/writer bar-shaped and opening the center of a loop antenna of the IC tag attached to the article. <P>SOLUTION: The optical disk control device 300 is constituted of a computer 150, that is located outside and controls the whole system by communicating data to the reader/writer 100, the reader/writer 100 that performs transmission of a conveyance power, based on a predetermined modulation method and communication of data with the IC tag 200 in a non-contact manner, the bar-shaped antenna 9 having generally the same diameter as the shaft hole of the optical disk, a plurality of optical disks 400 equipped with the IC tag 200, and a holder 57 that holds the bar-shaped antenna 9 and the plurality of optical disks 400. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
