| 摘要 |
A compact rain sensor (10) for mounting on the inner surface (30) of a windshield (18) includes collimator lenses (64, 66) and a detachable prismatic coupler (38) to facilitate the mounting of infrared emitters (56) and detectors (58) on a circuit board (26) which is positioned parallel to the inner surface of the windshield and has signal processing circuitry (80 A-D) as well. A thin optical coupler is adhesively secured to the windshield and a sensor housing (28) is detachably secured about the outer edges of the coupler.
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