摘要:
A method of creating an article of manufacture, the method comprising: (a) directing multiple laser beams to a single galvanometer; and, (b) dynamically repositioning the multiple laser beams in counterpart paths using the single galvanometer to shine the multiple laser beams on and melt a first powder material and, upon solidification of the melted first powder material, forming a first series of duplicate three dimensional structures, where each of the multiple laser beams is used to form at least one of the first series of duplicate three dimensional structures.
摘要:
The present disclosure relates to a modular fiber laser system operative to controllably guide a beam which is launched from a feeding fiber into a process fiber so that the high-aperture component is coupled and guided in cladding of the process fiber, and a low-aperture component is coupled into the core of the fiber. The laser system further has a reflective element configured with light-reflecting and light-transmitting portions. The high-aperture component at least partially decouples from the cladding into the core so that the core radiates the high-aperture and low-aperture components. The high-aperture component is incident upon the light-reflecting portion and backreflected into the process fiber so that a sensor array, which is located between the feeding and process fibers, detects the reflected light. The laser system further includes an adjustment system operatively connected to the sensor array and configured to displace the fibers relative to one another to an alignment position after the sensor array detects a maximum signal of the reflected high-aperture component.
摘要:
Es wird ein Verfahren zum Prüfen einer zur Abgabe gepulster fokussierter Laserstrahlung eingerichteten Lasereinrichtung (10) vorgeschlagen, deren Fokusposition (18) sowohl in als auch quer zur Ausbreitungsrichtung der Laserstrahlung verstellbar ist. Die Lasereinrichtung umfasst ein für die Laserstrahlung transparentes Kontaktelement (30) mit einer Anlagefläche (34) zur Anlage eines zu bearbeitenden Objekts. Im Rahmen des Verfahrens wird ein zumindest in einem Bearbeitungsbereich für die Laserstrahlung transparentes Testobjekt (36) an die Anlagefläche des Kontaktelements angelegt. Sodann wird Laserstrahlung in das an der Anlagefläche anliegende Testobjekt eingestrahlt und dabei die Fokusposition nach Maßgabe eines vorgegebenen Testmusters bewegt, um dauerhafte Bearbeitungsstrukturen in dem Testobjekt zu erzeugen.
摘要:
The invention relates to a laser processing machine, in particular a laser cutting machine (LM), comprising a work table for receiving a work piece (W) to be processed and a work arm (1) with at least one laser cutting head (2). The laser cutting head (2) comprises a nozzle receiving device (7) and a nozzle (D) arranged therein. By means of said nozzle (D) a laser beam (11) maybe directed onto the work piece (W). The machine (LM) also comprises main drives for moving the work arm (1) and/or the laser cutting head (2) in the directions of X-Y-Z axes for processing the work piece (W), as well as an alignment unit for adjusting the laser beam (11). An adjusting station (3) is provided in the effective working region of the main drives of the work arm (1), and comprises a receiving unit (31) for fixing the nozzle (D) and/or the nozzle receiving device (7) during centering of the nozzle (D). The alignment unit has a head element (5B) provided in the laser cutting head (2). The head element (5B)receives the nozzle (D) and/or the nozzle receiving device (7) and is slidable in the X-Y directions, exclusively by means of the existing main drives of the machine (LM), without any additional adjustment device. The head element (5B)maybe fixed against movement in a selected position, within the laser cutting head (2),by means of a releasable clamping device (12), releasable during the nozzle centering step in the adjusting station (3).
摘要:
In-line metrology methods and systems for use with laser-scribing systems used in solar-cell fabrication are disclosed. Such methods and systems can involve a variety of components, for example, a device for measuring the amount of power input to a laser, a power meter for measuring laser output power, a beam viewer for measuring aspects of a laser beam, a height sensor for measuring a workpiece height, a microscope for measuring workpiece features formed by the laser-scribing system, and a system for monitoring a laser-scribing system and annunciating a warning(s) and/or an error message(s) when operational limits are exceeded. In-line metrology methods can also include the processing of output beam reflections so as to track beam drift over time and/or provide for focusing of an imaging device.
摘要:
A system and associated method for laser processing of material specimens comprising a laser mounted to scan onto a track wherein the specimens are forwarded along the track in a forwarding direction, the laser is scanned over said track in a second direction, and the substrates are angled to the track.
摘要:
The invention refers to an illuminating apparatus for illuminating a sample (66) on a work stage (68) with a narrow illuminating line (70) of controlled energy, said illuminating line (70) being generated from a laser beam (12) propagating along a beam path (13) and being emitted from a laser source (10) and having an dimension in a first direction (x) exceeding an dimension in a second direction (y) being perpendicular to said first direction (x) by a multiple, comprising a beam shaping optical system (80) for shaping said laser beam (12) into a line shape (70a), an energy measuring device (58) for measuring energy of said laser beam (12), an energy control system (76) for generating a control signal (78) upon said measured laser beam energy and for controlling energy output of said laser source (10) upon said control signal (78). The invention is characterized by said energy measuring device (58) being arranged in said beam path (13) after said beam shaping optical system (80) and before said work stage (68) or by said control signal (78) being indicative of an averaged beam energy along the dimension of said line shaped beam (70a) in said first direction (x). The invention further refers to a method for controlling energy of a laser source (10) when illuminating a sample (66) on a work stage (68) with a narrow illuminating line (70), whereby said illuminating line (70) is generated from a laser beam (12) propagating along a beam path (13) and being emitted from said laser source (10) and having an dimension in a first direction (x) exceeding an dimension in a second direction (y) being perpendicular to said first direction (x) by a multiple, comprising the steps of shaping said laser beam (12) into a line (70a), measuring energy of said line shaped laser beam (12), generating a control signal (78) upon said measured laser beam energy, controlling energy output of said laser source (10) upon said control signal (78). According to the invention said control signal (78) is indicative of an averaged beam energy along the dimension of said line shaped beam (70a) in said first direction. According to another aspect of the invention said energy of said laser beam (12) in said beam path (13) is measured after said beam shaping and before said work stage (68).
摘要:
A plurality of coherent and incoherent light beams are combined into a composite high power diffraction limited beam by N oscillators (11), each transmitting light at one of N different wavelengths, each wavelength being split into M constituent beams. M beams in each of N groups are phase locked by a phase modulator (14), amplified, and coupled into an M x N fiber array (19). Beams from the array are collimated and incident 'on an optical beam combiner. The N single beams are incident and spectrally combined on a grating (25) which outputs a composite beam at a nominal 100% fill factor. A low power sample beam, taken from the N beams emerging from the optical combiner, is measured for phase deviations, from which phase correction signals are derived and fed back to the phase modulators (14).
摘要:
A method for combining beams from multiple laser emitters (20) , which may be optical fibers or bulk amplifiers, to form a composite output beam (50) with desirable beam characteristics, as measured, for example, by Strehl ratio. Beams from the multiple emitters (20) are interferometrically combined in the near field, and the phases of the beams are controlled to provide optimal phase coherence, and thereby to minimize losses. Various techniques are disclosed for controlling the phase angles of the emitted beams, using either a separate phase detector (28) for each emitter beam, or a single detector (28') for the composite output beam (50) , or nulling detectors (80, 82, 84) in spurious outputs from the beam combining optics (42, 48) . All of these techniques achieve an improvement in Strehl, largely because the interferometric combination of beams is independent of the array fill factor.
摘要:
An active laser energy delivery system includes a relay imaging system. Input optics arranged to receive the laser energy, a transmitting mirror having adjustable angle of incidence relative to the input optics, and a robot mounted processing head including an optical assembly are configured to direct laser energy toward the movable target image plane. The laser energy follows an optical path including an essentially straight segment from the transmitting mirror to the receiving mirror, having a variable length and a variable angle relative to the input optics. Diagnostics on the processing head facilitate operation.