46 results about "Beam parameter product" patented technology

An optical delivery waveguide for a material laser processing system includes a small lens at an output end of the delivery waveguide, transforming laser beam divergence inside the waveguide into a spot size after the lens. By varying the input convergence angle and / or launch angle of the laser beam launched into the waveguide, the output spot size can be continuously varied, thus enabling a continuous and real-time laser spot size adjustment on the workpiece, without having to replace the delivery waveguide or a process head. A divergence of the laser beam can also be adjusted dynamically and in concert with the spot size.

A direct-metal deposition (DMD) processing stage and a 5DOF (degree of freedom) dry micro-EDM (mEDM) stage are integrated to provide the submicron scale resolution necessary for the ultra-precision processing of work pieces. The DMD processing stage includes optical feedback for dimensional control utilizing a high-power, fiber-coupled diode laser with fast response time and small beam parameter product. The electrical discharge machining (EDM) stage is a dry EDM stage using an inert gas with appropriate dielectric properties to perform the surface finishing operations. The system further includes one or more surface treatment operations to obtain a desired level of surface hardness or wear resistance and / or to minimize the distortion induced in treating the surface.

A direct-metal deposition (DMD) processing stage and a 5DOF (degree of freedom) dry micro-EDM (mEDM) stage are integrated to provide the submicron scale resolution necessary for the ultra-precision processing of work pieces. The DMD processing stage includes optical feedback for dimensional control utilizing a high-power, fiber-coupled diode laser with fast response time and small beam parameter product. The electrical discharge machining (EDM) stage is a dry EDM stage using an inert gas with appropriate dielectric properties to perform the surface finishing operations. The system further includes one or more surface treatment operations to obtain a desired level of surface hardness or wear resistance and / or to minimize the distortion induced in treating the surface.

A beam generating apparatus includes a laser light source, a speckle suppressing module, a light homogenizing module and a driving unit. The laser light source outputs a laser beam. The speckle suppressing module includes two biconic lenses and a diffuser. The first biconic lens is disposed on a transmission path of the laser beam. The diffuser is located on the transmission path of the laser beam between the first and second biconic lenses. The light homogenizing module is disposed on the transmission path of the laser beam from the second biconic lens. The driving unit drives the diffuser to move with respect to the laser beam so that the ratio of the M2 of the laser beam exiting from the second biconic lens in a first direction to the M2 thereof in a second direction is greater than 2, wherein the two directions are substantially perpendicular to each other.

The invention concerns an optical device and its application to generate an adjustable wave front deformation of a laser beam and thus to generate an adjustable beam spot geometry in the focal plane of laser optics. For this purpose, a device is provided which allows adjusting and modifying a laser beam in such a way that a beam spot, the shape of which can be adjusted continuously based on the original focal shape, is generated after focusing the beam, i.e. at least one dimension parameter of the shape of the beam spot has to be variable and adjustable so that the beam parameter product of the beam can also be modified without having to modify the focal position.

The invention relates to a homogenization device of a product of the beam parameters of a semiconductor laser array fast-slow shaft, belonging to the application field of laser technology and including a group of semiconductor laser array fast-slow shaft aligning micro-lens unit, a flat glass pile A, B and a focusing lens set. The light passing through the fast-slow shaft aligning micro-lens vertically injects on the flat glass pile A, a beam is divided into a plurality of portions and generates refraction excursion in the flat glass corresponding to each beam to obtain linear beams distributed in a ladder shape along the direction of the fast shaft of the laser array. The ladder shape linear beams pass through the flat glass pile B and the beams are led to generate reflection excursion along the direction of the slow shaft of the array and are further redistributed as linear beams according to a same beam recombining principle; therefore, the beams given out by the semiconductor laser array have a more approximate beam parameter product on the fast-slow shaft, namely, a balanced beam quality in the fast-slow shaft direction. Finally, a uniform focusing spot with high power density and brightness in the fast-slow shaft direction can be obtained by the focusing of the focusing lens set.

A laser processing machine includes a beam parameter product variable device, and a beam diameter variable device. The beam parameter product variable device sets beam parameter products of a laser beam to a predetermined value. The beam diameter variable device includes a first lens that is movable in an optical axis direction and having a positive focal length, and converts divergent light of a laser beam emitted from an emission end of the laser beam into convergent light, and a second lens that is movable in the optical axis direction and having a negative focal length on which the convergent light is incident. A third lens having a positive focal length, focuses the laser beam emitted from the beam diameter variable device, and irradiates a plate material with the focused laser beam.

A process for joining first and second metal workpieces by laser brazing for forming a vehicle structure includes providing the workpieces in contacting relationship so as to form an elongated contact region, wherein at least one of the workpieces is made of hot-dip galvanized steel material, supplying a laser beam having a beam parameter product lower than 10 mm·mrad from a laser source, guiding the laser beam through a laser focus head having a total optical magnification in the range of 1:0.5-1:1.5, directing the laser beam along the elongated contact region, wherein a beam spot formed where the laser beam hits the contact region has a size in the range of 2-6 mm, and supplying a consumable wire of filler material to the beam spot to melt the consumable wire and braze the workpieces together, wherein the consumable wire comprises at least 95% copper.

Apparatuses and methods for material processing are disclosed. In an embodiment, an apparatus may include a source of electromagnetic radiation that emits the radiation in a beam with a defined power density distribution and beam-shaping optics variably shaping and focusing the radiation of the beam source. An optical axis of the radiation may be directed onto a processing zone. The apparatus may also include means for holding the radiation in a region wherein the radiation interacts with a material forming and moving in the processing zone; as well as an adjusting device that varies the second beam parameter product by changing at least one of a position and an optical property of at least one optical element. In an embodiment, a first optical element of the beam-shaping optics generates or increases the amount of an aberration; and a second optical element of the beam-shaping optics changes an amount of an aberration generated or increased by changing, using the adjusting device, a position or optical properties the first and / or the second optical element, such that the second beam parameter product is adjusted.

In various embodiments, a stepped-cladding fiber having a central core, a first cladding, a ring core, and a second cladding is utilized to tune the beam parameter product and / or numerical aperture of the laser beam.

Equipped with: a light source unit (3), which emits excitation light (101); a light deflection unit (140), which deflects the excitation light (101); a wavelength conversion unit (160), which is irradiated with the excitation light deflected by the light deflection unit (140) (101), convert the excitation light (101) into wavelength converted light with different wavelengths to emit; ), the first optical system (11) arranged between the light source part (3) and the light deflection part (140), and the first optical system (11) arranged between the light deflection part (140) and the wavelength conversion part (160) Two optical systems (12) constitute, in the section perpendicular to the direction of travel of the excitation light (101), the axis of the direction in which the beam parameter product of the excitation light (101) becomes the minimum is set as the Ax axis, and the axis perpendicular to the Ax axis is When the axis of the direction is the Ay axis, in the second optical system (12), the focus distance in the Ay axis direction is smaller than the focus distance in the Ax axis direction.