| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coordinate indicator inputting position indicator by using a directional light source and effective especially for a wide region. SOLUTION: A position is operated by the distance and angle from a light source derived with light from the light source detected using a directional light source, a half mirror, a photoelectric converting element, a rotational stage fixing them on specific positions in advance and rotationally scanning, and another photoelectric converter element. By this, a complex device is not necessary and the light source can be constituted of one, and so the device constitution is simplified and economical device can be made.</p> |
