| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To inexpensively constitute an optical position detecting means with low power consumption. <P>SOLUTION: A position detecting device 10 includes: position detection light sources 12A, 12B for emitting position detecting light beams L2a, L2b; a front surface 30a having a detection plane area 10P for emitting the position detection light beams; a photo detector 15 arranged in an area along the front surface and detecting at least a part of the reflection light of the position detection light beams from a detection object Ob which is arranged on the front surface in the detection plane area; and a control means for obtaining planar position information of the detection object in the detection plane area, based on the detection value of the reflection light by the photo detector. An optical detection azimuth range in the orthogonal direction of the front surface concerning the photo detector is smaller than an optical detection azimuth range in the direction along the front surface. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
