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US 2009/0261237 A1Published application
Optical sensor device
AssigneeTRW Automotive Electronics & Components GmbH & Co. KG
InventorUlrich Backes
Life of this patent
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AssigneeTRW Automotive Electronics & Components GmbH & Co. KG
InventorUlrich Backes
Estimating the term…
An optical sensor device has a sensor unit which includes a light emitter (24), a light receiver (26), and a lens plate (12) that is used for coupling a pencil of rays, radiated by the light emitter (24), into and out of the pane and directing it onto the light receiver (26). The lens plate (12) includes a combined Fresnel structure (16a, 16b) having a Fresnel lens structure (18a, 18b) and a Fresnel reflector structure (20a, 20b) on a first surface (12a) facing the light emitter (24) and the light receiver (26), and a Fresnel reflector structure (22a, 22b) on an opposite, second surface (12b) facing the pane. This configuration is especially suitable for use as a rain sensor. Without the light emitter the sensor device is suitable to be used as a light sensor.
An optical sensor device, adapted to be coupled to a pane and comprising a sensor unit which includes a light emitter, a light receiver, and a lens plate that is used for coupling a pencil of rays, radiated by the light emitter, into and out of the pane and directing it onto the light receiver, the lens plate including a combined Fresnel structure having a Fresnel lens structure and a Fresnel reflector structure on a first surface facing the light emitter and the light receiver, and a Fresnel reflector structure on an opposite, second surface facing the pane.
An optical sensor device, adapted to be coupled to a pane and comprising a sensor unit which includes a light receiver and a lens plate that is used for coupling a pencil of rays, incident on the pane, out of the pane and directing it onto the light receiver, the lens plate including a combined Fresnel structure having a Fresnel lens structure and a Fresnel reflector structure on a first surface facing the light receiver, and a Fresnel reflector structure on an opposite, second surface facing the pane.
Dependencies are inferred from the claim text.