| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an information recording medium which can finely read information from each information recording medium and simultaneously read information from a plurality of information recording mediums by using an infrared absorbing ink having different transmission and absorption properties in a near infrared region. <P>SOLUTION: In the information recording medium, a dot code layer formed of dot codes is formed on an infrared-reflecting substrate, the dot code layer has a background and a two-dimensional code composed of an aggregate of the dot codes, and dots constituting the background are different in infrared absorbing properties from dots constituting the two-dimensional code. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
