Automatic headlamp dimmer with optical baffle
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United States of America Patent
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-
Jun 23, 1992
Grant Date -
N/A
app pub date -
Oct 15, 1990
filing date -
Oct 15, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vehicle light sensor for controlling light responsive systems such as an automatic headlamp dimmer. The sensor includes an enclosure containing a lens and a photo responsive detector. An optical chamber within the enclosure permits unwanted light from reaching the detector. A series of baffles within the chamber prevent light from outside a desired entrance angle from reaching the detector. A thin-film aperture is attached to the detector for controlling the size and shape of the detector's field of view. Gray scale shading may also be incorporated into the aperture to reduce the intensity of incoming light in selected portions of the field of view. An adjustment mechanism provides very fine angular view adjustments, beyond what is practical by simple assembly of molded parts.
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