The embodiments of the present disclosure provide an optical device and an excimer laser annealing equipment. The optical device includes: a light source; a transparent window spaced apart from the light source by a distance; and an optical system disposed between the light source and the transparent window. The transparent window is configured such that emergent light of the light source is vertically incident onto the transparent window after passing through the optical system.

The present invention relates to a laser device for annealing coatings deposited on large-width substrates, said device being formed from a plurality of laser modules that may be juxtaposed without particular limitation, wherein the laser modules generate elementary laser lines that combine with one another in the length direction to form a single laser line, each elementary line having an overlap in the length direction with one or two adjacent elementary laser lines; and at least two adjacent elementary laser lines have an offset with respect to one another in the width direction, said offset being smaller than half the sum of the widths of said at least two adjacent elementary laser lines; the overlap of said at least two adjacent elementary laser lines is such that, in the absence of offset, the power-per-unit-length profile of the single laser line has a local maximum level with the zone of overlap.

A beam delivery technology for high power laser systems, like laser peening systems, for work pieces which may have compound curvatures, includes placing an optical assembly having a receiving optic, beam formatting optics and a scanner mounted thereon, in a position to receive laser pulses from a laser source and within an operating range of the process area. Polarized laser pulses are delivered to the receiving optic while the position of the optical assembly remains unchanged. The pulses proceed through the beam formatting optics to the scanner, and are direct to respective impact areas having nominal shapes and locations on the work piece. The scanning process includes for each laser pulse, setting direction, divergence, polarization, rotation and aspect ratio of the laser pulses output from the scanner, to control the polarization, shape and location on respective impact areas.

The present invention provides a method for forming a conductive track on a surface (21) of a substrate (11). The method comprises providing a substrate (11), wherein the substrate (11) comprises deposited material (23) along a path on a surface (21) of the substrate (11). Generating a laser beam having an optical axis and an energy distribution within a cross-sectional area of the laser beam incident on the surface (21). The energy distribution of the laser beam is non-circularly symmetric about the optical axis at the surface (21). The method further comprises directing the laser beam to move along said path to irradiate the deposited material (23) to provide a conductive track along said path. A selected orientation of the energy distribution within the cross-sectional area is aligned with the direction of movement of the laser beam.

A laser irradiation apparatus may include: an irradiation head section including first and second irradiation heads each configured to perform laser light irradiation on a workpiece; a laser unit section including first and second laser units configured to respectively output first laser light and second laser light; a beam delivery section provided in an optical path between the laser unit section and the irradiation head section, and configured to perform switching of optical paths between optical paths of the first laser light and the second laser light to cause the first or second laser light to enter the first or second irradiation head; a first beam property varying section provided in an optical path between the first laser unit and the irradiation head section; and a second beam property varying section provided in an optical path between the second laser unit and the irradiation head section.

Additive manufacturing systems and methods for fabricating an article are provided. The additive manufacturing system may include a substrate and a layering device configured to fabricate a first layer of the article on the substrate. The layering device may include an optical beam source configured to generate an optical beam and a variable beam characteristics (VBC) fiber operably coupled with the optical beam source and configured to modify one or more beam characteristics, such as a wavelength, of the optical beam.

Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.

Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.

A laser tool includes a tool body disposed at least partially along a central longitudinal axis, and a head unit connected to the tool body with a rotational joint. The head unit rotates around the central longitudinal axis with the rotational joint, includes a laser head to direct a laser energy toward a target and along a second longitudinal axis of the head unit. A purging nozzle, fluidly connected to a fluid source, includes a nozzle outlet oriented at an angle relative to the second longitudinal axis of the head unit, and directs fluid at an angle into a pathway of the laser energy from the laser head to bias purged material out of the pathway of the laser energy. The rotational joint supports the head unit on the tool body, and moves the head unit in a radial direction relative to the central longitudinal axis.

If an optical path length of an optical system is reduced and a length of a laser light on an irradiation surface is increased, there occurs curvature of field which is a phenomenon that a convergent position deviates depending on an incident angle or incident position of a laser light with respect to a lens. To avoid this phenomenon, an optical element having a negative power such as a concave lens or a concave cylindrical lens is inserted to regulate the optical path length of the laser light and a convergent position is made coincident with a irradiation surface to form an image on the irradiation surface.