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    • 9. 发明公开
    • OPTISCHER SENSOR
    • OPTISCHER传感器
    • EP1045779A1
    • 2000-10-25
    • EP99955696.2
    • 1999-09-15
    • ROBERT BOSCH GMBH
    • MUELLER-FIEDLER, RolandSAUTTER, HelmutBERNHARD, WinfriedMUELLER, AndreMUELLER, LutzSCHINK, Rainer
    • B60S1/08G01N21/55G01N21/77
    • G01D5/268B60S1/0822B60S1/0837B60S1/0877B60S1/0881G01N21/552
    • The invention relates to an optical sensor for detecting humidity on a surface (11), notably on a motor vehicle window, comprising at least one transmitter (13) and at least one receiver (15) for electromagnetic waves. The surface is positioned in a detection zone (16) between the at least one transmitter (13) and the at least one receiver (15). A wetting of the surface (11) in the detection zone (16) triggers a signal change. The invention provides for the optical sensor to have a light-guiding element (18) in which the electromagnetic waves are guided bidirectionally into and out of the detection zone (16), a retroreflector (10) being positioned in the detection zone (16) in such a way that it guides the electromagnetic waves reflected by the surface (11) back to the surface (11) and from there to the light-guiding element (18).
    • 用于检测表面(11)上的湿度的光学传感器技术领域本发明涉及一种用于检测表面(11)上的湿度的光学传感器,特别是在机动车窗上,包括用于电磁波的至少一个发射器(13)和至少一个接收器(15)。 该表面位于至少一个发射器(13)和至少一个接收器(15)之间的检测区(16)中。 检测区(16)中的表面(11)的润湿会触发信号变化。 本发明提供了光学传感器具有导光元件(18),其中电磁波被双向地导入和导出检测区域(16),回射器(10)被定位在检测区域(16)中, 以这种方式将由表面(11)反射的电磁波引导回到表面(11)并从那里到达光导元件(18)。