Lensed optical fiber for illuminating capillary tube
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United States of America Patent
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Jul 28, 2015
Grant Date -
Jan 2, 2014
app pub date -
Jun 27, 2012
filing date -
Jun 27, 2012
priority date (Note) -
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Abstract
An optical fiber (500) illuminates the bore (520) of a capillary tube (515) that is used for separating chemicals by capillary electrophoresis (CE). The fiber terminates in either two sloped regions (525) and a curved region (530) or two sloped regions (705) and a flat region (700). Light from these regions is focused on the bore of the capillary tube. Since the fiber is sized to illuminate the core of a CE capillary, it is larger than fibers used in telecommunications and its sloped regions are at angles that would be unsuitable for use in telecommunications. The relatively large diameter of the capillary permits efficient use of a light source (905).
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