Abstract:
A silicon crystallization system includes a beam generator generating a laser beam, first and second optical units for controlling the laser beam from the beam generator; and a stage for mounting a panel including an amorphous silicon layer to be polycrystallized by the laser beam from the optical units. The first optical unit makes the laser beam have a transverse edge and a longitudinal edge longer than the transverse edge, and the second optical unit makes the laser beam have a transverse edge and a longitudinal edge shorter than the transverse edge.
Abstract:
An apparatus for recycling waste (100), which includes both recyclable material and non-recyclable material (104) coupled to the recyclable material. The apparatus includes a laser (200) to ablate the non-recyclable material (104) from the recyclable material (102), a detector (204) to detect the relative position of waste and the laser, a sensor (206) to determine the absorptivity of the non-recyclable material (104), positioning means (110, 214, 216) to move the laser (200) and/or the waste (100), and laser control circuitry to control the fluence of the laser source (200). The laser (200) emits light having a peak wavelength and the sensor (206) determines the absorptivity of the non-recyclable material (104) for light having a wavelength approximately equal to this peak wavelength. The positioning means (110, 214, 216) moves the laser and/or the waste (100) such that the laser light irradiates at least a portion of the waste (100), and the laser control circuitry controls the fluence of the laser light on the waste (100) based on the absorptivity of the non-recyclable material (104).
Abstract:
The properties of a metal piece (13) are altered by laser peening the piece of the first side (14) using an acoustic coupling material (19) operatively connected to the second side and subsequently laser peening the piece on the second (15) side using an acoustic coupling material operatively connected to the first side.
Abstract:
A laser beam (102) of 350-800 nm wavelength generated by a pulsed laser (101) is shaped into a line beam (300) of width (W0) and length (L0). The resulting beam (300) is emitted onto a film material (201) of amorphous or polycrystalline silicon on a substrate (203) for a heat treatment.
Abstract:
The invention relates to a device for welding together the ends of tubular plastic containers, notably tubes. Said device comprises a holding device which keeps the container stationary such that its opening points upwards, as well as means for heating an annular peripheral area of the container near its opening so that the opening can subsequently be welded along an elongated seam running perpendicular to the length of the container. A plurality of diode lasers (14) is positioned on a support (12) in a virtually circular manner in such a way that their beams strike the inner or outer wall of the container (10) either directly or via an optical deflection element.
Abstract:
A photosensitive layer of or for a cathode ray tube is illuminated by means of a laser illumination arrangement. The laser illumination arrangement comprises a homogenizer which serves to reduce the coherence of the laser beam.
Abstract:
The invention concerns a device for uniformly removing individual or several layers from a coated surface using a pulsed laser. A beam former is used so that each pulse of laser radiation illuminates a section of given cross-section in the surface, the surface being scanned by the pulsed laser beam in lines in such a way that each unit of area of the surface along the line receives the same number of laser pulses. To ensure that the edge zones of each line receive the same number of laser pulses per unit area of surface as the central zone of each line, each side of the central zone of the section illuminated is bordered by an edge zone with an outwards-tapering surface. The two facing edge zones together form a common surface whose width is the same as that of the central zone of the section, measured in the direction of scan of the laser.
Abstract:
A gas permeable glass window, suitable for use with liquid interface additive manufacturing, has an optically transparent glass article greater than about 0.5 millimeters in thickness defining a first surface and a second surface. A plurality of gas channels are disposed through the article from the first surface to the second surface. The gas channels occupy less than about 1.0% of a surface area of the article and are configured such that the article has a gas permeability between about 10 barrers and about 2000 barrers.
Abstract:
Methods for manufacturing hot-stamped components are described. The method comprises providing a hot-stamped component by hot forming dye quenching. Selecting a first and a second portion of the hot-stamped component, wherein the first portion has a different width than the second portion. A laser system, wherein the laser system comprises one or more optical elements and a laser source for generating a laser beam is provided. The laser system is moved along a length of the component. Finally, the laser beam is applied in a single pass onto the selected first and second portions using the laser system, wherein a laser beam spot size is adjusted during the application of the laser beam and is adapted to the widths of the first and second portions, and wherein a power of the laser beam is regulated based on the temperature measured in the hot-stamped component. The disclosure further relates to components obtained using such methods.