| 摘要 |
<p>PROBLEM TO BE SOLVED: To facilitate the adjustment of an optical system for an optical coordinate input device, particularly, the adjustment of a degree of parallelization to a coordinate input plane. SOLUTION: Two sets of optical units for emitting a sector plane light are installed on the coordinate input plane with a space. Furthermore, a position corresponding to a key to the sector plane light is used as a supporting point in adjusting the sector plane light to be parallel to the coordinate input plane.</p> |
