To provide a laser irradiation apparatus which suppresses adhesion of foreign matters to an optical element, a laser irradiation device includes: emission optical systems, which form a beam in which laser light generated by a laser oscillator converges on a predetermined beam spot, and continuously change an irradiation direction or the like of the beam; and a protective member which is arranged between the emission optical system and the beam spot, and protects the emission optical system from foreign matters scattered from an irradiation object side, and the protective member has an aperture through which the beam passes and moves in connection with a change of the irradiation direction or the like of the beam so that the aperture is positioned on a path of the beam.

A laser processing apparatus includes first and second laser oscillators that emit first and second laser lights (LB1), (LB2) having wavelengths different from each other, an optical fiber that guides first and second laser lights (LB1), (LB2), and laser head (50) configured to condense first and second laser lights (LB1), (LB2), respectively, at predetermined positions of a workpiece. Laser head (50) includes optical path difference generation unit (70) provided inside second housing (51). Optical path difference generation unit (70) is configured to make an optical path length of first laser light (LB1) inside second housing (51) longer than an optical path length of second laser light (LB2).

Systems and methods for additive manufacturing systems implementing adaptive optics in accordance with various embodiments of the invention are illustrated. One embodiment includes an additive manufacturing system including a laser source configured to form an output beam, a scanning mirror disposed in an optical path of the output beam, wherein the scanning mirror is configured to reflect and scan the output beam at a range of scan angles, a deformable mirror disposed in the optical path of the output beam, wherein the deformable mirror has a plurality of configurations for reflecting and altering a wavefront of the output beam, wherein the configuration of the deformable mirror is based on the scan angle of the scanning mirror, and a print bed configured to hold a print material, wherein the output beam is configured to fuse the print material to form a build object.

A method of confirming an optical axis of a laser processing apparatus includes placing an image capturing unit so as to be movable in X-axis directions, removing a second mirror and capturing an image of a laser beam with the image capturing unit for receiving the laser beam reflected by a first mirror, installing the second mirror and capturing an image of the laser beam with the image capturing unit for receiving the laser beam reflected by a third mirror, and determining whether an optical axis of the laser beam reflected by the first mirror and an optical axis of the laser beam reflected by the third mirror exist in one XZ plane or not on the basis of the captured images and a reference line in the captured images.

An irradiation device for additively manufacturing three-dimensional objects may include a beam generation device that includes a plurality of laser diode arrays. Respective ones of the plurality of laser diode arrays may include a plurality of diode emitters respectively configured to emit an energy beam. The plurality of laser diode arrays may be longitudinally offset relative to one another, and the plurality of laser diode arrays may be laterally offset relative to one another.

An annular hollow offset-focus laser cladding device, including a housing, a conical reflector arranged in the housing, an annular off-axis parabolic focusing mirror opposite to and arranged coaxially with the conical reflector, a nozzle installed below the conical reflector and a powder-spraying tube connected to a lower end of the nozzle. A top of the housing is provided with a light entrance; the conical reflector faces the light entrance; The powder-spraying tube is coaxial with the annular hollow offset-focusing light reflected by the annular off-axis parabolic focusing mirror; a collimating protective gas jacket is arranged on a periphery of the powder-spraying tube, and the collimating protective gas jacket is located between the annular hollow offset-focused light and the powder-spraying tube; the annular off-axis parabolic focusing mirror is configured to create a horizontally offset of parent parabola focus.

Method and system for a laser welding process employing the use of a single pulsed fiber laser source configured to generate a radiative output with a wavelength spectrum extending from about 1.8 microns to about 2.6 microns. In a specific case, the laser output from the single pulsed fiber laser source is focused onto the interface of the two pieces of materials at least one of which includes any of glasses, inorganic crystals, and semiconductors.

A machine learning apparatus able to obtaining an optimal shift amount of an assist gas. The machine learning apparatus comprises a state-observation section configured to observe machining condition data included in a machining program given to the laser machine, and measurement data of a dimension of dross generated at a cutting spot of the workpiece when the machining program is executed, as a state variable representing a current state of an environment in which the workpiece is cut; and a learning section configured to learn the shift amount in association with cutting quality of the workpiece, using the state variable.

A laser processing apparatus includes a support part, a light source, a spatial light modulator, a converging part, and a controller. The controller controls the spatial light modulator so that laser light is branched into a plurality of rays of processing light including 0th-order light and a plurality of converging points for the plurality of rays of processing light are located at positions different from each other in a Z direction and an X direction, and controls at least one of the support part and the converging part so that the X direction coincides with an extension direction of a line and the plurality of converging points move relatively along the line. The controller controls the spatial light modulator so that a converging point of the 0th-order light is located one side with respect to a converging point of non-modulated light of the laser light, in a Y direction.

A method of laser welding together two or more overlapping metal workpieces (12, 14, or 12, 150, 14) included in a welding region (16) of a workpiece stack-up (10) involves advancing a beam spot (44) of a laser beam (24) relative to a top surface (20) of the workpiece stack-up along a first weld path (72) in a first direction (74) to form an elongated melt puddle (76) and, then, advancing the beam spot (44) of the laser beam (24) along a second weld path (78) in a second direction (80) that is opposite of the first direction while the elongated melt puddle is still in a molten state. The first weld path and the second weld path overlap so that the beam spot of the laser beam is conveyed through the elongated melt puddle when the beam spot is advanced along the second weld path.