An additive manufacturing system can include at least one laser source and a speckle reduction system that receives light from the at least one laser source. The speckle reduction system provides laser light to an optical homogenizer that increases uniformity of laser light and can provide the light to an area patterning system.

Provided is a multi-beam laser debonding apparatus for debonding an electronic component from a substrate, the apparatus including: a first laser module to emit a first laser beam to a predetermined range of a first substrate area including attachment positions of a debonding target electronic component and a neighboring electronic component to thereby heat a solder of the electronic components to reach a predetermined pre-heat temperature; and a second laser module to emit a second laser beam overlapping the first laser beam to a second substrate area smaller than the first substrate area, the second substrate area including the attachment position of the debonding target electronic component to thereby heat the solder of the debonding target electronic component to reach a debonding temperature at which the solder commences melting.

A laser beam combining device includes an emission optical system that emits a plurality of circular laser beams propagated coaxially and having mutually different wavelengths, and a diffractive optical element that is concentric and diffracts the plurality of circular laser beams. The diffractive optical element diffracts the plurality of circular laser beams in accordance with the wavelengths of the circular laser beams, such that local diffraction angles of diffracted light of the plurality of circular laser beams incident at mutually different local incidence angles are equal to each other.

Disclosed is a method for an all-laser hybrid additive manufacturing. After a matrix is obtained by means of selective laser melting forming, a subtractive forming is carried out on the matrix by means of a pulse laser to form a cavity, and the cavity is then packaged to obtain a forming material with an internal cavity structure. A laser precision packaging method is used in the method based on the melting of the laser selective region. Also disclosed is the apparatus, comprising a laser unit (2), a control unit (4) and a forming unit (6). The laser unit is in light path connection with the forming unit, and the control unit is electrically connected with the laser unit and the forming unit respectively. The laser unit comprises a first laser light source to and a second laser light source. The forming unit comprises a welding unit (68), and the welding unit is controlled by the control unit and is matched with the laser unit for the additive manufacturing.

A method for welding coated steel sheets, particularly steel sheets that are coated with an aluminum-silicon metallic coating layer, is provided. A configuration of two laser beams is provided, wherein the laser beams act on a weld pool that is to be formed, at least one laser beam rotates around a rotation axis so that the laser beams execute a movement relative to each other, and the laser beams are guided along a welding axis. In order to achieve a mixing of the weld pool, a defined stirring effect and a defined welding speed in relation to each other are adhered to, wherein a mathematically defined condition applies to the stirring effect.

A method for welding coated steel sheets, particularly steel sheets that are coated with an aluminum-silicon metallic coating layer, is provided. A configuration of two laser beams is provided, wherein the laser beams act on a weld pool that is to be formed, at least one laser beam rotates around a rotation axis so that the laser beams execute a movement relative to each other, and the laser beams are guided along a welding axis. In order to achieve a mixing of the weld pool, a defined stirring effect and a defined welding speed in relation to each other are adhered to, wherein a mathematically defined condition applies to the stirring effect.

The laser reflow apparatus of the present invention comprises a laser pressurization head module for pressing a bonding object, which includes a plurality of electronic components arranged on a substrate by a transmissive pressurization member while irradiating a laser beam through the pressurization member, to bond the electronic components to the substrate; and a bonding object transfer module for transferring the bonding object having transferred from one side of the laser pressurization head module to carry the bonding object to the other side thereof after passing through a reflow process of the laser pressurized head module.

An optical arrangement converts an input laser beam into a line-like output beam, which propagates along a propagation direction and which has, in a working plane, a line-like beam cross section extending along a line direction. The optical system includes: a reshaping optical unit having an input aperture, through which the input laser beam is radiated, and an elongate output aperture, elongatedly extending along an aperture longitudinal direction, the reshaping optical unit converting the input laser beam radiated through the input aperture into a beam packet exiting through the output aperture; and a homogenization optical unit which converts the beam packet into the line-like output beam, different beam segments of the beam packet being intermixed and superimposed along the line direction. The aperture longitudinal direction extends in a manner rotated about the propagation direction by a non-vanishing angle of rotation with respect to the line direction.

A laser crystallizing apparatus includes a first light source unit configured to emit a first input light having a linearly polarized laser beam shape. A second light source unit is configured to emit a second input light having a linearly polarized laser beam shape. A polarization optical system is configured to rotate the first input light and/or the second input light at a predetermined rotation angle. An optical system is configured to convert the first input light and the second input light, which pass through the polarization optical system, into an output light. A target substrate is seated on a stage and output light is directed onto the target substrate. A monitoring unit is configured to receive the first input light or the second input light from the polarization optical system and measure a laser beam quality thereof.

A method of laser machining a workpiece includes the steps of: radiating a laser beam onto at least one workpiece, the laser beam having a core beam and a ring beam extending coaxially with one another, wherein the laser beam is moved over the workpiece along a pre-determined machining path, and adjusting a laser power of the core beam and/or a laser power of the ring beam as a function of a position of the laser beam on the workpiece. An associated laser machining system is also disclosed.