Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-10-15
1992-06-23
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250239, H01J 314
Patent
active
051245493
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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Macks Harold R.
Michaels Paul A.
Smith Michael R.
Lectron Products, Inc.
Nelms David C.
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