| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a marker which can be accurately measured by an observing object even if the marker is slightly skewed to the observing object. <P>SOLUTION: The marker comprises a marker unit including a pattern and a lens which is put on the pattern and a gradation pattern thereof observed on the lens changes according to a direction of observation to the lens. <P>COPYRIGHT: (C)2012,JPO&INPIT |
