LIGHT SOURCE AND METHODS FOR MICROSCOPY AND ENDOSCOPY
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United States of America Patent
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Issued Date -
Jul 2, 2009
app pub date -
Nov 7, 2008
filing date -
Nov 7, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In one example embodiment, a drive probe is coupled to the lamp body to provide the primary power for ignition and steady state operation of the lamp. Feedback may be used to adjust frequency in response to changing conditions of the lamp during startup. A phase shifter may be used to adjust the phase of the power between ignition and steady state operation. A sensor may detect a lamp operating condition that automatically triggers a shift in phase after the fill in the bulb is vaporized. In another example embodiment, a method for sequentially optimizing the drive power and phase shift applied to the lamp is disclosed that may reliably regulate the lamp current consumption to desired startup and operational levels despite variations in lamp environmental conditions.
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