| 摘要 |
The sensor device has a sensor unit including a light receiver (26) and a lens plate (12), where the sensor unit couples an ambient light beam out of a windscreen (10) and directs the light beam onto the light receiver. The lens plate has a Fresnel prism structure (22) on surface (12a) facing the windscreen. The prism structure has a set of individual structures (24) designed such that the structures deflect the light beam at different angles. Another Fresnel prism structure (16) has orientation differs from orientation of the prism structure (22). An independent claim is also included for a rain/light sensor comprising an optical sensor device and an optical rain sensor device. |
