The present application relates to a laser marking system (100) comprising a laser (110) configured to produce a laser beam, a marking head (130) configured to project the laser beam onto a target, and a negative curvature hollow core fiber (120) configured to transmit the laser beam from the laser (110) to the marking head (130).

A wafer producing method includes a peel-off layer forming step of forming a peel-off layer by positioning a focused spot of a laser beam having a wavelength transmittable through an ingot to a depth corresponding to a thickness of the wafer to be produced from the ingot from a first end surface of the ingot and applying the laser beam to the ingot, a first chamfered portion forming step of forming a first chamfered portion by applying, from the first end surface side to a peripheral surplus region of the wafer, a laser beam having a wavelength absorbable by the wafer, a peeling-off step of peeling off the wafer to be produced, and a second chamfered portion forming step of forming a second chamfered portion by applying, from a peel-off surface side of the wafer, the laser beam having a wavelength absorbable by the wafer.

An additive manufacturing system includes an energy source and a material delivery device. The energy source is configured to direct an energy beam toward a component to form a melt pool. The material delivery device is configured to feed a wire toward the melt pool to deposit material on the component. In some examples, the material delivery device is configured to discharge a current to the wire to disengage the wire from the melt pool. In some examples, the material delivery device is configured to measure an arc voltage between the wire and the component.

A method of operating an apparatus for laser annealing, includes reducing temporal or spatial coherency of a plurality of laser beams by beam superimposing; and reducing an electric field inner product magnitude of beams having the reduced temporal or spatial coherency by a fly eye lens array to reduce coherency, and/or by modifying a polarization state between the beams by beam superimposing.

A method and an apparatus for collecting powder samples in real-time in powder bed fusion additive manufacturing may involves an ingester system for in-process collection and characterizations of powder samples. The collection may be performed periodically and uses the results of characterizations for adjustments in the powder bed fusion process. The ingester system of the present disclosure is capable of packaging powder samples collected in real-time into storage containers serving a multitude purposes of audit, process adjustments or actions.

A fabric has enhanced response characteristics for laser finishing. The fabric can be denim for denim apparel such as jeans. Software and lasers are used to finish apparel made of the fabric to produce a desired wear or distressing pattern or other design. The fabric allows for relatively fast color change in response to the laser, color changes in hue from indigo blue to white, many grayscale levels, and maintains strength and stretch properties. A method used to make the fabric includes spinning, dyeing, and weaving yarns in such a way to obtain the desired enhanced response characteristics for laser finishing.

Apparatus (1) for additively manufacturing three-dimensional objects (2) by means of successive layerwise selective irradiation and consolidation of layers of a build material (3) which can be consolidated by means of an energy source (4), wherein a control unit (6) is provided that is adapted to receive or generate encrypted object data relating to at least one three-dimensional object (2) to be built in a, in particular additive, manufacturing process performed on the apparatus (1), wherein the or a control unit (6) is adapted to decrypt the encrypted object data for performing the additive manufacturing process.

Some variations provide an aluminum alloy feedstock for additive manufacturing, the aluminum alloy feedstock comprising from 79.8 wt % to 88.3 wt % aluminum; from 1.1 wt % to 2.1 wt % copper; from 3.0 wt % to 4.6 wt % magnesium; from 7.1 wt % to 9.0 wt % zinc; and from 0.5 wt % to 2.8 wt % zirconium as a grain-refiner element. The aluminum alloy feedstock may be in the form of an ingot powder. In some variations, the aluminum alloy feedstock comprises from 81.3 wt % to about 87.8 wt % aluminum; from 1.2 wt % to 2.0 wt % copper; from 3.2 wt % to 4.4 wt % magnesium; from 7.3 wt % to 8.7 wt % zinc; and from 0.5 wt % to 2.8 wt % zirconium.

A pulsed laser printing module for a contact lens, comprises a steel mold, a pulsed laser device and a forming case. The steel mold is configured for transferring pigment. The pulsed laser device is configured for transmitting ultrashort laser pulses having pulse time widths less than 10.sup.−9 seconds. The ultrashort laser pulses etch the surface of the steel mold to remove a coating of the steel mold to form an etched layer. The forming case has a lower member and an upper member. The lower member is a concavity, and an inner surface of the lower member is provided with a lower curved surface. The upper member is provided with a protrusion corresponding to the lower member, and an outer surface of the protrusion is provided with an upper curved surface corresponding to the lower curved surface. The protrusion is capable of being placed in a concavity of the lower member to form a gap between the lower curved surface and the upper curved surface.

The cutting station (1) for profiled elements, particularly for window and door frames, comprises one basic structure (2), one line of movement (3, 4) of one profiled element (P) associated with the basic structure (2) and adapted to move the profiled element (P) along a direction of movement (D) in order to displace it with respect to the basic structure (2), and one cutting assembly (5) associated with the basic structure (2), arranged along the direction of movement (D) and adapted to cut the profiled element (P) according to at least one angle of width comprised between 10° and 170° with respect to the longitudinal direction to obtain at least two portions of profiled element (P1, P2), wherein the station (1) comprises one laser marking assembly (22) associated with said basic structure (2) and adapted to emit one laser beam (R) towards the profiled element (P) in order to engrave one identification mark on the profiled element itself.