Variable condenser for delivery of illumination including recursively nested circle to-line fiber optic converter cable
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United States of America Patent
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Feb 14, 2012
Grant Date -
Nov 5, 2009
app pub date -
Apr 29, 2009
filing date -
Apr 30, 2008
priority date (Note) -
Expired
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Abstract
A variable condenser for delivery of illumination, including a recursively nested circle-to-line fiber optic shape-converting cable and a focusable input lens system. At the input of the fiber optic cable, sets of individual optical fibers comprise successively smaller annuli recursively nested about a common center. At the output of the fiber optic cable, the sets of individual optical fibers comprise pairs of line segments recursively nested about the line midpoint, whereby the nesting level of the pairs of line segments has an exact or an approximate correspondence to the nesting level of the annuli. The output may be split into a plurality of lines, whereby the sets of individual optical fibers are distributed among the plurality of lines. The input lens system has a single adjustable focus means to vary the radius of an illumination spot incident upon the input of the fiber optic cable circle input.
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