Space coordinates detecting device and input apparatus using same

摘要: According to the present invention there is provided a space coordinates detecting device wherein section for light emitted from source provided, thereby permitting detection of relative angle between emitting sections and hence application an input apparatus. The with sensing element 23 having quartered portions. In section, distinguishable lights are two sources. thus throttled through apertures applied as separate square spots S16 S17 light-sensitive surface 23. By calculating difference in detected output among portions, it possible determine center I1 spot I2 S17. A rotational respect Z axis can be determined by inclination α on X-Y orthogonal line x connecting both centers I2.