A vehicle rearview mirror system includes a rearview mirror assembly comprising an electro-optic reflective element and, preferably, at least a first and a second photo-sensor, both facing generally in a common direction. The system further includes a light piping element that pipes light to the first photo-sensor from a light environment different from the light environment to which the second photo-sensor is exposed. The first photo-sensor comprises a semiconductor photo-sensor sensitive both to visible light and to infrared radiation. A spectral filter is disposed in front of the first photo-sensor to reduce the amount of infrared radiation incident thereat. The spectral filter preferably comprises at least one of a) a filter element having at least about 60% visible light transmission and having less than about 10% transmission in the near-infrared spectral region; and b) an infrared attenuating dye in a polymer material.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation of U.S. patent application Ser. No. 10/229,573, filed on Aug. 28, 2002 now U.S. Pat. No. 7,008,090, which claims priority from U.S. provisional patent application Ser. No. 60/316,045, filed on Aug. 30, 2001, the disclosures of which are hereby incorporated herein by reference in their entireties.
A vehicle rearview mirror system includes a rearview mirror assembly comprising an electro-optic reflective element and, preferably, at least a first and a second photo-sensor, both facing generally in a common direction. A light piping element pipes light to the first photo-sensor from a light environment different from the light environment to which the second photo-sensor is exposed. The first photo-sensor may comprise a semiconductor photo-sensor sensitive both to visible light and to infrared radiation. A spectral filter may be disposed in front of the first photo-sensor to reduce the amount of infrared radiation incident thereat. One of the first and second photo-sensors may have a rearward field of view relative to the forward direction of travel of the vehicle, and the other of the first and second photo-sensors may have a forward field of view relative to the forward direction of the travel of the vehicle.
