Method and apparatus for laser cutting
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United States of America Patent
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Sep 6, 2016
Grant Date -
Oct 24, 2013
app pub date -
Apr 18, 2013
filing date -
Oct 22, 2010
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Abstract
Method and system for laser cutting is disclosed. Using a novel dual-focus optical conversion unit. The dual-focus optical conversion unit may comprise a beam splitter and a convex mirror. The beam splitter may be insensitive to the polarization of an incident beam. The convex mirror may be placed beyond and parallel to the beam splitter, wherein the surface of the convex mirror may be coated with a reflective phase-retarder coating.
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