Fibre optic device for homogenizing a laser beam

摘要

PCT No. PCT/FR96/01252 Sec. 371 Date Jan. 23, 1998 Sec. 102(e) Date Jan. 23, 1998 PCT Filed Aug. 6, 1996 PCT Pub. No. WO97/07424 PCT Pub. Date Feb. 27, 1997An optical device for homogenizing a laser beam includes a plurality of abutting front lenses (LFnm) for dividing the laser beam to be homogenized into mxn 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 (LFmn) and having a plurality of entrance pupils (PEij) each of which is arranged at the focus of a front lens (LFmn) selected among said plurality of front lenses (LFmn); a second intermediate plane (PI2) having a plurality of exit pupils (PSij), a collection lens (LC) capable of collecting the beams from the plurality of exit pupils (PSij); and optical transmission means for individually transmitting the light beams from the plurality of entrance pupils (PSij) to the plurality of exit pupils (PSkj).