| 摘要 |
<p>A reflective light sensor in which a light projecting element and a light receiving element (1) which receives reflected light from an object to be detected that has received light from the light projecting element by a light receiving surface elongated in one direction are disposed to have a relationship in which the image formation position of the reflected light in the length direction of the light receiving surface changes according to the distance from the object to be detected. In order to reduce the amount of noise light that enters the light receiving element, the light receiving element receives the light in a light receiving area having a width that becomes narrower toward the direction in which the image formation position of the reflected light moves when the object to be detected approaches the sensor. In an embodiment, the light receiving element is a two-split light receiving element, and a shielding member (11) having an opening (10) is disposed in front thereof. In the opening, an open portion corresponding to a Near-side light receiving element (1N) which receives strong reflected light from a place relatively closer to the sensor has a width that becomes narrower away from a boundary with the other Far-side light receiving element (1F).</p> |
