US 11,794,281 B2
Laser processing
Ian James Thomson, Rosyth (GB)
Assigned to RENISHAW PLC, Wotton-under-Edge (GB)
Appl. No. 16/635,808
Filed by RENISHAW PLC, Wotton-under-Edge (GB)
PCT Filed Aug. 8, 2018, PCT No. PCT/GB2018/052258
§ 371(c)(1), (2) Date Jan. 31, 2020,
PCT Pub. No. WO2019/030522, PCT Pub. Date Feb. 14, 2019.
Claims priority of application No. 1712739 (GB), filed on Aug. 9, 2017.
Prior Publication US 2021/0129426 A1, May 6, 2021
Int. Cl. B23K 26/342 (2014.01); B29C 64/153 (2017.01); B23K 26/06 (2014.01); B23K 26/34 (2014.01); B22F 10/28 (2021.01); B22F 12/49 (2021.01); B33Y 10/00 (2015.01); B22F 10/36 (2021.01); B22F 10/366 (2021.01); B23K 26/082 (2014.01); B29C 64/393 (2017.01); B29C 64/286 (2017.01); B29C 64/268 (2017.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B23K 26/342 (2015.10) [B22F 10/28 (2021.01); B22F 12/49 (2021.01); B23K 26/0626 (2013.01); B23K 26/0643 (2013.01); B23K 26/0648 (2013.01); B23K 26/0652 (2013.01); B23K 26/082 (2015.10); B23K 26/34 (2013.01); B29C 64/153 (2017.08); B29C 64/268 (2017.08); B29C 64/286 (2017.08); B29C 64/393 (2017.08); B22F 10/36 (2021.01); B22F 10/366 (2021.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] 19 Claims
OG exemplary drawing
 
1. A method of laser processing comprising:
generating a laser beam having, at different longitudinal positions in a propagation direction, first and second transverse beam profiles of energy density, the first transverse beam profile at a focal point of the laser beam having a flatter-top than the second transverse beam profile away from the focal point of the laser beam; and
carrying out a scan of the laser beam across a working surface,
wherein, during the scan, at least one of the laser beam and the working surface is adjusted to adjust a relative position of the working surface to the focal point such that, for a first part of the scan, the first transverse beam profile is located at the working surface and, for a second part of the scan, the second transverse beam profile is located at the working surface.