| 摘要 |
<p>PURPOSE:To provide a touch switch generating no erroneous operation by removing the incident light from an angle other than the optical axes of receiving/transmitting optical element opposing each other, in an optical matrix system of touch switch. CONSTITUTION:In this system, steps 12 are provided on the inner wall of the light leading members 11 of a receiving/transmitting optical element holder A1 and a receiving/transmitting optical element holder B2, and by holding a receiving optical element 4 with the above receiving/transmitting optical element holders A1 and B2, only the light from the optical axis is led to the above receiving optical element 4.</p> |
