LIGHT INTENSITY CONTROL FOR NEAR INFRARED SPECTROSCOPY
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United States of America Patent
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Issued Date -
Apr 8, 2010
app pub date -
May 1, 2008
filing date -
May 1, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system for near infrared spectroscopy includes a controller that automates selection of light intensities for one or more light sources. The system may stepwise increase or decrease a current driving a light source until a signal received at a light detector is within a desired range. The system may maintain closed loop control over the intensity of a light source after the intensity has been set. The closed loop control may be based on a signal from a second light detector that senses light from the light source. Current/intensity settings may be established for each of multiple light detectors. In response to selection of a light detector, the corresponding current may be delivered to drive the light source.
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