An assembly (10) for sensing moisture (20) on the exterior surface (22) of a windshield (14) from a position spaced from the interior surface (18) of the windshield (14). The assembly (10) includes a focal plane detector (12) comprising a plurality of pixels (24) adapted for disposition in spaced relationship...http://www.google.es/patents/US6207967?utm_source=gb-gplus-sharePatente US6207967 - Off the glass imaging rain sensor
