Rain sensor

Equipment equipped with the camera which has an optical 合焦 means for the sensor which has been arranged in the shape of a sequence and made as [receive / irradiation according to an irradiation cycle], and which has two or more pixels which detect light, and the camera focus set up almost infinitely which the window screen surface of a car gets wet, and/or detects dirt especially. This equipment has a light source which irradiates with the detection portion on the surface of a screen further detectable with the above-mentioned camera. As for this light source, the change of ON/OFF is performed based on a predetermined ON-and-OFF cycle. This ON-and-OFF cycle synchronizes with the irradiation cycle of the above-mentioned camera sensor, the above-mentioned screen surface gets wet and /dirt is detected by comparing the picture information from the above-mentioned camera sensor by the case where they are a case where this light source is an ON state, and an OFF state.