BANDWIDTH NARROWING MODULE FOR SETTING A SPECTRAL BANDWIDTH OF A LASER BEAM
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United States of America Patent
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Issued Date -
Apr 26, 2012
app pub date -
Sep 21, 2011
filing date -
May 8, 2009
priority date (Note) -
Abandoned
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Abstract
The disclosure provides a bandwidth narrowing module for setting a spectral bandwidth of a laser beam of a laser light source. The bandwidth narrowing module includes a beam expanding module for expanding a laser beam transversely with respect to a propagation direction of the laser beam and comprising a reflection grating. A first optical component of the bandwidth narrowing module is configured so that a disturbance with a cylindrical portion about a first axis transversely with respect to an optical axis of the bandwidth narrowing module can be impressed on a wavefront of a laser beam. The first optical component is embodied such that it is pivotable about a pivoting axis parallel to the first axis.
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