| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate difficulty of reading information in a recording medium, wherein it is difficult to form a fine pitch and consequently highly effective to prevent forgery, however, unless the information recording medium is tilted largely, it is difficult to check a pattern, character, symbol, and so on of diffracted light. <P>SOLUTION: An information reading device includes: the information recording medium for recording information about a relief structure that has a diffracted-light emission mechanism; a light source for emitting light to the information recording medium; and a screen for projecting diffracted light from the information recording medium. <P>COPYRIGHT: (C)2011,JPO&INPIT |
