Optical fault monitoring
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United States of America Patent
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Dec 11, 2012
Grant Date -
Mar 17, 2011
app pub date -
Sep 14, 2009
filing date -
Sep 14, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
Various embodiments related to monitoring for optical faults in an optical system are disclosed. For example, one disclosed embodiment provides, in an optical system comprising a light source, a light outlet, and an optical element disposed between the light source and the light outlet, a method of monitoring for optical system faults. The method includes detecting, via a light sensor directed toward an interface surface of the optical element closest to the light source, an intensity of light traveling from the interface surface of the optical element to the light sensor, and comparing an intensity of light detected to one or more threshold intensity values. The method further includes identifying an optical system fault condition based on comparing the intensity of light detected to one or more threshold values, and modifying operation of the optical system.
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