Patent ID: 8338774
Filing Date: 2012-12-25
Classification: B60S,G02B

Abstract:
1. An optical sensor comprising an optical plate which is adapted to make surface contact on a windshield of a motor vehicle, a plurality of sensor units having different light directional characteristics being formed by a plurality of photoreceivers which are all arranged on a side of the optical plate facing away from the windshield and light-transmissive surface regions of an optical mask which are associated with the photoreceivers and arranged in the optical path upstream of the photoreceivers, the light-blocking and light-transmissive surface regions being formed in a patterned structure that consists of multiple patterned elements, each having a surface area that is small in comparison with the surface area of the light-sensitive surface of the photoreceivers, wherein the light-transmissive surface regions expose optical paths delimited by the light-blocking surface regions for ambient light incident on the windshield, traversing the optical plate, and impinging on the photoreceivers, forming two beams of rays each of which is incident on one of the photoreceivers with a smooth curve for the directional characteristic.