Optically sensed high density switch position sensor
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United States of America Patent
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Issued Date -
Jan 15, 2004
app pub date -
May 8, 2003
filing date -
Jul 15, 2002
priority date (Note) -
Abandoned
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Abstract
An optical sensing system for optically detecting high density sensor inputs. The sensing system includes a sensor having a reflective portion for reflecting light in a desired direction corresponding to a condition of the sensor. The system also includes an optical fiber for receiving light from an illumination source and directing a light signal at the sensor. The light signal is reflected from the sensor according to the sensor's position and optically coupled through the optical fiber to a detector that detects an intensity of the reflected light signal transmitted through the optical fiber in response to the position of the sensor. In one form, the sensor is a switch having a reflective coating that reflects light in a desired direction corresponding to the position of the switch. In another form, the detector is a CCD for receiving many reflected light signals, each signal coupled to a respective pixel of the CCD.
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