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1. (WO2002006095) OPTICAL PRECIPITATION SENSOR

Pub. No.:    WO/2002/006095    International Application No.:    PCT/US2001/022874
Publication Date: Jan 24, 2002 International Filing Date: Jul 19, 2001
IPC: B60S 1/08
G01N 21/43
G01N 21/55
Applicants: THE GATES CORPORATION
Inventors: GRAVES, Danny
PURMA, Jaroslav
KOCAREK, Jiri
LAN, Jaromir
Title: OPTICAL PRECIPITATION SENSOR
Abstract:
The invention is a precipitation sensor adapted to detect water upon an automotive glass and a method for its use. The precipitation sensor includes an optical emitter and a first mirror surface in optical communication with the optical emitter. The first mirror surface is adapted to reflect and collimate light enission from the optical emitter. The precipitation sensor also includes an optical receiver and a second mirror surface in optical communication with the optical receiver. The second mirror surface is adapted to focus collimated light upon the optical receiver. The precipitation sensor further includes an intermediate reflector in optical communication with the first mirror surface and with the second mirror surface.