US 12,242,076 B2
Light-emitting device and method for emitting light
Gael Pilard, Wankheim (DE); Hendrik Specht, Pliezhausen (DE); Martin Edel, Stuttgart-Vaihingen (DE); Sebastian Reiss, Reutlingen (DE); and Simon Pick, Tuebingen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/293,286
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Feb. 18, 2020, PCT No. PCT/EP2020/054273
§ 371(c)(1), (2) Date May 12, 2021,
PCT Pub. No. WO2020/193014, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 102019204019.5 (DE), filed on Mar. 25, 2019.
Prior Publication US 2022/0013975 A1, Jan. 13, 2022
Int. Cl. H01S 5/40 (2006.01); G02B 27/09 (2006.01); G02B 27/14 (2006.01); H01S 3/00 (2006.01); H01S 5/00 (2006.01)
CPC G02B 27/0911 (2013.01) [G02B 27/141 (2013.01); H01S 3/0085 (2013.01); H01S 5/4012 (2013.01); H01S 5/005 (2013.01); H01S 5/4093 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A light-emitting device, comprising:
a laser light device configured to emit a multiplicity of laser light beams, ellipticities of beam cross-sections of the laser light beams differing at least partly from one another;
a beamforming device in the beam path of at least one of the laser light beams and configured to adapt the ellipticities of the beam cross-sections of the laser light beams to one another by adapting a major axis and a minor axis of the beam cross-section of the at least one laser light beam to one another;
a beam-combining device configured to combine the laser light beams to form an overall light beam, after the adapting of the ellipticities of the beam cross-sections by the beamforming device; and
a further beamforming device situated in the beam path of the overall light beam, wherein the further beamforming device has at least one cylinder lens and/or a cylinder telescope, wherein the major axis of the elliptical beam cross-section of a laser light beam of the multiplicity of laser light beams, or of the overall light beam, is configured to be adapted to the minor axis.