Method and apparatus for modifying the spread of a laser beam
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United States of America Patent
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Jan 6, 2009
Grant Date -
Jul 5, 2007
app pub date -
Mar 14, 2007
filing date -
Feb 13, 2003
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Abstract
An apparatus and method for modifying the spread of a laser beam. The apparatus comprises a laser source operable to generate a laser beam having a flux that exceeds a predetermined value and an optical train operable to modify the beam such that the flux of the beam through a predetermined aperture does not exceed the predetermined value. The optical train may include a focusing lens, a diffractive focusing vortex lens, a beam splitting device, or a two-dimensional diffraction grating.
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