The present disclosure relates to a laser polishing apparatus where the laser beam emitted by the laser polishing apparatus can be configured to control the shape of the optical fiber end face. Stated another way, the laser polishing apparatus parameters can be adjusted such that the laser beam emitted can polish the optical fiber end face into a particular shape.

A method and system for laser metal powder deposition using beam wobbling. The system may include a fiber laser configured to generate a laser beam and a laser head, the laser head configured to receive the laser beam from the fiber laser and including a collimator configured to collimate the laser beam, a wobbler module having first and second movable mirrors, and a focus lens configured to focus the collimated laser beam through a powder nozzle device such that a focal point location of the focused collimated laser beam is positioned below a workpiece surface. The powder nozzle device delivers metal powder to a region on the workpiece surface that is heated by the focused collimated laser beam.

A focal length adjusting device is provided with: a retention unit for retaining a first lens; a guide unit for supporting the retention unit so as to allow movement along an optical axis of laser light; a stepper motor that has a shaft body and is arranged so that the central axis of the shaft body is orthogonal to the optical axis; and a conversion unit that is interposed between the shaft body and the retention unit and converts rotational movement of the shaft body into linear movement of the retention unit. The conversion unit comprises, between itself and the retention unit, a coupling unit that transmits kinetic force from the conversion unit to the retention unit in a direction parallel to the optical axis but does not transmit same in a direction parallel to the central axis of the shaft body.

A laser-processing apparatus for forming features in a workpiece includes at least one sensor for generating process control data representing a) at least one characteristic of the apparatus either before, during or after the workpiece is processed to form a set of features, b) at least one characteristic of the workpiece either before, during or after the workpiece is processed to form a set of features, and/or c) at least one characteristic of an ambient environment in which the apparatus is located either before, during or after the workpiece is processed to form a set of features. A controller executes, or facilitate execution of, a candidate feature selection process whereby process control data is processed to estimate whether any of the features formed in the workpiece are defective and the location of any feature estimated to be defective is identified.

A laser processing apparatus includes at least a laser oscillator, optical fiber (30), and laser head (40). Laser head (40) includes at least first and second shield glasses (45) and (47) and first and second light receivers (51) and (52) inside second housing (41). In first and second shield glasses (45) and (47), first and second coating films (46) and (48) are respectively provided on light receiving surfaces of laser light (LB). First light receiver (51) receives laser light (LB) reflected by first coating film (46) and outputs a first light receiving signal, and second light receiver (52) receives laser light (LB) reflected by peripheral portion (48b) of second coating film (48) and outputs a second light receiving signal.

An optical system that relays light to a machining lens to be used for machining on a workpiece includes a spatial light modulator and a second lens arranged between the spatial light modulator and the machining lens, a distance D from the second lens to a machining lens pupil is D = f.sub.2 - Mf.sub.2, and a distance D1 from the spatial light modulator to the second lens is D1 = f.sub.2 - f.sub.2/M, and the spatial light modulator has a conjugate relation with the machining lens pupil of the machining lens, where f.sub.2 is a focal length of the second lens, and M is a projection magnification from the spatial light modulator to the machining lens pupil of the machining lens.

A method for processing a transparent workpiece includes forming a contour of defect in the transparent workpiece and separating the transparent workpiece along the contour using an infrared laser beam. During separation, the method also includes detecting a position and propagation direction of a crack tip relative to a reference location and propagation direction of an infrared beam spot, determining a detected distance and angular offset between the crack tip and the reference location of the infrared beam spot, comparing the detected distance to a preset distance, comparing the detected angular offset to a preset angular offset, and modifying at least one of a power of the infrared laser beam or a speed of relative translation between the infrared laser beam and the transparent workpiece in response to a difference between the detected distance and the preset distance and between the detected angular offset and the preset angular offset.

A method for determining a depth of a vapor capillary during laser machining includes: irradiating a machining laser beam onto a workpiece to form the capillary, the beam deflected by a first deflection device along a machining path within a first scan field, irradiating an optical measuring beam onto the workpiece, the measuring beam deflected by a second deflection device relative to the machining laser beam along a scanning path within a scanning area and then together with the machining laser beam by the first deflecting device, acquiring measured distance values along the path based on part of the measuring beam reflected by the workpiece, determining a depth/position of the capillary based on the acquired measured distance values. The scanning area size is based on a position of the laser beam and/or deflection of the laser beam by the first deflection device. A corresponding laser machining system is also provided.

A laser device may include a first lens array including first lenses arranged in a first direction, a condenser lens disposed in a second direction intersecting the first direction of the first lens array and a first refractive index adjusting member disposed in a third direction opposite to the second direction of the first lens array.

A laser tool, in particular for the structuring of cylinder running surfaces, that offers the possibility of guiding the laser beam of the laser tool with high process reliability, it is provided that the laser tool has a laser source for producing laser beams that are passed through a lens tube located in a hollow shaft, wherein a lens through which the laser beams are passed is attached to the lens tube, wherein the hollow shaft is designed to be rotatable as a hollow-shaft motor, wherein a spindle, to which is attached an optical device for deflecting the laser beam onto a workpiece surface, is attached to the hollow shaft, wherein the hollow shaft is rotatable independently of the lens.