REFLECTION TYPE SENSOR

To provide a reflection type sensor in which it is possible to suppress a change in sensor output that corresponds to the distance to a measurement object.SOLUTION: Provided is a reflection type sensor for irradiating a measurement object with irradiation light and receiving reflected light from the measurement object. The reflection type sensor comprises: a substrate 110; a light-emitting element 140 for radiating irradiation light; a first light-receiving element 151 for receiving an S-wave component of the reflected light and a second light-receiving element 152 for receiving a P-wave component of the reflected light; a lens; and a shading wall 170. The shading wall 170 blocks a portion of the reflected light and limits a first reflection region where the reflected light can enter the first light-receiving element 151 and a second reflection region where the reflected light can enter the second light-receiving element 152, and ratios of the first and second reflection regions to the irradiation region of the measurement object are progressively larger as the distance to the measurement object increases.SELECTED DRAWING: Figure 2 【課題】測定対象物までの距離に応じたセンサ出力の変動を抑制可能な反射型センサを提供する。【解決手段】測定対象物に照射光を照射し、測定対象物からの反射光を受光する反射型センサであって、基板１１０と、照射光を照射する発光素子１４０と、反射光のＳ波成分を受光する第１受光素子１５１および反射光のＰ波成分を受光する第２受光素子１５２と、レンズと、遮光壁１７０とを備える。遮光壁１７０は、反射光の一部を遮光して第１受光素子１５１へ反射光が入光可能な第１反射領域および第２受光素子１５２へ反射光が入光可能な第２反射領域を制限し、測定対象物の照射領域に対する第１反射領域および第２反射領域の各比率は、測定対象物までの距離が大きくなるほど大きくなることを特徴とする。【選択図】図２