US 12,032,183 B2
Spatial frequency filter device for use with a laser beam, spatial frequency filter assembly having such a spatial frequency filter device, and method for spatial frequency filtering of a laser beam
Malte Kumkar, Weimar (DE); Stefan Doerr, Bietigheim-Bissingen (DE); and Daniel Flamm, Ludwigsburg (DE)
Assigned to TRUMPF LASER—UND SYSTEMTECHNIK GMBH, Ditzingen (DE)
Filed by TRUMPF Laser- und Systemtechnik GmbH, Ditzingen (DE)
Filed on Oct. 14, 2021, as Appl. No. 17/500,962.
Application 17/500,962 is a continuation of application No. PCT/EP2020/060704, filed on Apr. 16, 2020.
Claims priority of application No. 10 2019 205 642.3 (DE), filed on Apr. 17, 2019.
Prior Publication US 2022/0035083 A1, Feb. 3, 2022
Int. Cl. G02B 5/18 (2006.01); B23K 26/06 (2014.01); G02B 5/20 (2006.01); G02B 27/09 (2006.01)
CPC G02B 5/1814 (2013.01) [B23K 26/0652 (2013.01); G02B 5/20 (2013.01); G02B 27/0944 (2013.01); G02B 27/0988 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A spatial frequency filter device for use with a laser beam, the spatial frequency filter device comprising:
a neutral region, which is configured to transmit or reflect the laser beam; and
a deflecting region, which radially adjoins the neutral region and is configured to deflect beam components of the laser beam from a beam axis of the laser beam,
wherein the deflecting region has a constant portion, in which a deflecting effect on the beam components of the laser beam for each location in the constant portion is configured to be independent of a distance of a location from the neutral region, and
wherein the deflecting region has a variation portion, in which the deflecting effect on the beam components of the laser beam is configured to vary, dependent on a distance from the neutral region.