Pneumatically operated, dimmable mirror assembly

G - Physics – 02 – B

Patent

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Details

G02B 5/08 (2006.01) G02B 17/00 (2006.01)

Patent

CA 2567654

A dimmable mirror assembly operates responsive to changes in the thickness of a light absorbing fluid contained between a transparent glass plate and a high reflectance, first surface mirror. The thickness of the light absorbing fluid layer is pneumatically or hydraulically controlled. Variations in pressure are typically developed responsive to a compressible element which can be controlled manually, or responsive to an electrically operated solenoid or motor, to control pressures for creating desired actuation forces. The actuation forces produced by the resulting assembly can be controlled locally, or can be controlled remotely by the driver. The dimmable mirror assembly is suitable for locations within the interior of a vehicle and outside of the vehicle.

L'invention concerne un ensemble miroir à intensité réglable qui réagit à des changements d'épaisseur d'un fluide absorbant la lumière contenue entre une plaque de verre transparent et un miroir de surface à haute réflexivité. L'épaisseur de la couche de fluide absorbant la lumière est réglée de façon pneumatique ou hydraulique. Des variations de pression surviennent généralement en réaction à un élément compressible qui peut être réglé manuellement ou en réaction à un solénoïde ou à un moteur électrique afin de réguler les pressions et de produire ainsi des forces d'actionnement voulues. Les forces d'actionnement produites par l'ensemble ainsi obtenu peuvent être régulées sur place ou à distance par le conducteur. L'ensemble miroir à intensité réglable convient pour des emplacements à l'intérieur ou à l'extérieur d'un véhicule.

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