Detection system for birefringence measurement
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United States of America Patent
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Aug 21, 2012
Grant Date -
Nov 12, 2009
app pub date -
Sep 26, 2007
filing date -
Sep 26, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A method of controlling a light beam in an optical system includes a light source that directs a collimated light beam along a path, through a sample, and toward the active area of a stationary detector. The method includes the step selectively moving a lens into the path of the light beam for spreading the beam in instances where the path of the beam is altered by the sample between the source and the stationary detector The detector, therefore, is held stationary. Adjustment means are provided for increasing the intensity characteristic of the light that reaches the detector to account for a decrease in intensity that occurs when the lens is in the path of the light beam to spread the beam.
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