| 摘要 |
<p>PURPOSE:To obtain a transmission-type stable sensor without erroneous detection which can obtain the same output of a photodetector even when a light bending member is shifted as when it is not shifted. CONSTITUTION:A transmission-type sensor 10 is constituted of a detector 1 which is comprised of a light emitting element 4 and a photodetector 5 arranged in parallel to the element 4, and a light bending member 11 confronting to the detector 1. The light bending member 11 guides the light from the light emitting element 4 to the photodetector 5. The bending member 11 is a triangular prism in an isosceles triangular cross section with 22.5 deg. base angle, having superior transmittance. A base 11c confronts to the detector 1 with a predetermined distance. Moreover, the two equilaterals 11a, 11b of the member 11 are mirror finished.</p> |
