Fibre optic device for homogenizing a laser beam
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United States of America Patent
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Apr 25, 2000
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N/A
app pub date -
Jan 23, 1998
filing date -
Aug 11, 1995
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Abstract
An optical device for homogenizing a laser beam includes a plurality of abutting front lenses (LF.sub.nm) for dividing the laser beam to be homogenized into m.times.n laser beams, each having a substantially uniform cross section, and a substantially homogeneous energy distribution; a first intermediate plane (PI1) located in the focal plane of the front lenses (LF.sub.mn) and having a plurality of entrance pupils (PE.sub.ij) each of which is arranged at the focus of a front lens (LF.sub.mn) selected among said plurality of front lenses (LF.sub.mn); a second intermediate plane (PI2) having a plurality of exit pupils (PS.sub.ij), a collection lens (LC) capable of collecting the beams from the plurality of exit pupils (PS.sub.ij); and optical transmission means for individually transmitting the light beams from the plurality of entrance pupils (PS.sub.ij) to the plurality of exit pupils (PS.sub.kj).
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