| 摘要 |
A photosensor includes first and second light receiving elements (12, 16, 18) which detect light, and a light source which is disposed behind the first and second light receiving elements and which emits light containing a predetermined color component. A first filter (102) is disposed in front of the first light receiving element and transmits light of the predetermined color component, and a second filter (104) is disposed in front of the second light receiving element and shuts off the light of the predetermined color component and transmits a color component other than the predetermined color component. A judging section judges whether or not a detection target is present in front of the first (102) and second filters (104) in accordance with outputs from the first and second light receiving elements (12, 16, 18). |
