| 摘要 |
A detection target space of an optical position detecting device is divided into a detection target space configured by a first light receiving and emitting unit and a second light receiving and emitting unit and a detection target space configured by a third light receiving and emitting unit and a fourth light receiving and emitting unit. The first light receiving and emitting unit and the fourth light receiving and emitting unit are separated in the X axis direction, and the second light receiving and emitting unit and the third light receiving and emitting unit are arranged on one side in the Y axis direction. The first light receiving and emitting unit and the fourth light receiving and emitting unit are arranged on the outer side of the second light receiving and emitting unit and the third light receiving and emitting unit in the X axis direction.
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