Fibre optic device for homogenising a laser beam

Details Fibre optic device for homogenising a laser beam Fibre optic device for homogenising a laser beam

G - Physics

02

B

G02B 27/09 (2006.01) B23K 26/00 (2006.01) B23K 26/06 (2006.01) G02B 3/00 (2006.01)

Patent

CA 2224998

An optical device for homogenising a laser beam includes a plurality of abut-ting front lenses (LF nm) for dividing the laser beam to be homogenised into m × n laser beams, each having a substan-tially uniform cross-section, and a substantially homoge-neous energy distribution; a first intermediate plane (PI1) located in the focal plane of the front lenses (LF mn) and having a plurality of entrance pupils (PE ij) each of which is arranged at the focus of a front lens (LF mn) selected among said plurality of front lenses (LF mn); a second inter-mediate plane (P12) having a plurality of exit pupils (PS ij), a collecting lens (LC) capable of collecting the beams from the plurality of exit pupils (PS ij); and optical transmission means for individually transmitting the light beams from the plurality of entrance pupils (PS ij) to the plurality of exit pupils (PS kl).

Le dispositif optique pour homogénéiser un faisceau laser, comprend une pluralité de lentilles frontales (LFmn) pour découper le faisceau laser à traiter en m x n faisceaux laser ayant chacun une section transversale sensiblement uniforme, et une répartition énergétique sensiblement homogène; un premier plan intermédiaire (PI1), situé dans le plan focal des lentilles frontales (LFmn), et possédant une pluralité de pupilles d'entrée (PEij) disposées chacune au point de focalisation d'une lentille frontale (LFnm) choisie parmi la pluralité de lentilles frontales (LFmn); un second plan intermédiaire (PI2) possédant une pluralité de pupilles de sortie (PSij), une lentille de collection (LC) étant apte à collecter les faisceaux issus de la pluralité de pupilles de sortie (PSij); et des moyens de transmission optique propres à transmettre individuellement les faisceaux lumineux provenant de la pluralité de pupilles d'entrée (PEij) vers la pluralité de pupilles de sortie (PSkl).

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