公开(公告)号：US20170259375A1

公开(公告)日：2017-09-14

申请号：US15598816

申请日：2017-05-18

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm ,  Myriam Kaiser

IPC: B23K26/064 ,  G02B5/18 ,  G02B27/09

CPC classification number: B23K26/064 ,  B23K26/53 ,  B23K2103/54 ,  G02B5/1871 ,  G02B27/0927 ,  G02B27/0944

Abstract: An optical system for shaping a laser beam includes a beam shaping element configured to receive the laser beam having a transverse input intensity profile and to impose a beam shaping phase distribution onto the laser beam. The optical system further includes a near field optical element, arranged downstream of the beam shaping element at a beam shaping distance and is configured to focus the laser beam into the focus zone. The imposed phase distribution results in a virtual optical image of the elongated focus zone located before the beam shaping element. The beam shaping distance corresponds to a propagation length of the laser beam within which the imposed phase distribution transforms the transverse input intensity profile into a transverse output intensity profile at the near field optical element.

公开(公告)号：US20220032398A1

公开(公告)日：2022-02-03

申请号：US17500956

申请日：2021-10-14

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm

IPC: B23K26/067 ,  B23K26/0622 ,  B23K26/06 ,  G02B27/09 ,  G02B27/28

Abstract: A processing optical unit for workpiece processing includes a birefringent polarizer configured to split at least one input laser beam into a pair of partial beams polarized perpendicularly to one another. The processing optical unit further includes a focusing optical unit arranged downstream of the birefringent polarizer in the beam path and configured to focus the pair of partial beams onto focus zones in a focal plane. The processing optical unit is configured to produce at least partly overlapping focus zones of the pair of partial beams.

公开(公告)号：US10882143B2

公开(公告)日：2021-01-05

申请号：US15599720

申请日：2017-05-19

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm ,  Myriam Kaiser

IPC: B23K26/53 ,  G02B5/00 ,  G02B27/09 ,  B23K26/064 ,  B23K26/06 ,  B23K26/042 ,  B23K26/046 ,  B23K26/073

Abstract: For material processing of a material, which is in particular for a laser beam to a large extent transparent, asymmetric shaped modifications are created transverse to the propagation direction of the laser beam. Thereby, the laser beam is shaped for forming an elongated focus zone in the material, wherein the focus zone is such that it includes at least one intensity maximum, which is transverse flattened in a flattening direction, or a transverse and/or axial sequence of asymmetric intensity maxima, which are flattened in a sequence direction. After positioning the focus zone in the material, a modification is created and the material and the focus zone are moved relative to each other in the or across to the flattening direction or in the or across to the sequence direction for forming a crack along an induced preferred direction.

公开(公告)号：US20200316711A1

公开(公告)日：2020-10-08

申请号：US16857596

申请日：2020-04-24

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm ,  Myriam Kaiser

IPC: B23K26/064 ,  G02B5/18 ,  G02B27/09 ,  B23K26/53

Abstract: An optical system for shaping a laser beam includes a beam shaping element configured to receive the laser beam having a transverse input intensity profile and to impose a beam shaping phase distribution onto the laser beam. The optical system further includes a near field optical element, arranged downstream of the beam shaping element at a beam shaping distance and is configured to focus the laser beam into the focus zone. The imposed phase distribution results in a virtual optical image of the elongated focus zone located before the beam shaping element. The beam shaping distance corresponds to a propagation length of the laser beam within which the imposed phase distribution transforms the transverse input intensity profile into a transverse output intensity profile at the near field optical element.

公开(公告)号：US12233475B2

公开(公告)日：2025-02-25

申请号：US17500956

申请日：2021-10-14

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm

IPC: B23K26/067 ,  B23K26/06 ,  B23K26/0622 ,  G02B27/09 ,  G02B27/28

Abstract: A processing optical unit for workpiece processing includes a birefringent polarizer configured to split at least one input laser beam into a pair of partial beams polarized perpendicularly to one another. The processing optical unit further includes a focusing optical unit arranged downstream of the birefringent polarizer in the beam path and configured to focus the pair of partial beams onto focus zones in a focal plane. The processing optical unit is configured to produce at least partly overlapping focus zones of the pair of partial beams.

公开(公告)号：US20210170530A1

公开(公告)日：2021-06-10

申请号：US17126879

申请日：2020-12-18

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm ,  Myriam Kaiser

IPC: B23K26/53 ,  G02B27/09 ,  B23K26/042 ,  B23K26/073 ,  B23K26/046 ,  B23K26/06 ,  B23K26/064 ,  G02B5/00

Abstract: For material processing of a material, which is in particular for a laser beam to a large extent transparent, asymmetric shaped modifications are created transverse to the propagation direction of the laser beam. Thereby, the laser beam is shaped for forming an elongated focus zone in the material, wherein the focus zone is such that it includes at least one intensity maximum, which is transverse flattened in a flattening direction, or a transverse and/or axial sequence of asymmetric intensity maxima, which are flattened in a sequence direction. After positioning the focus zone in the material, a modification is created and the material and the focus zone are moved relative to each other in the or across to the flattening direction or in the or across to the sequence direction for forming a crack along an induced preferred direction.

公开(公告)号：US10661384B2

公开(公告)日：2020-05-26

申请号：US15598816

申请日：2017-05-18

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm ,  Myriam Kaiser

IPC: B23K26/064 ,  G02B5/18 ,  G02B27/09 ,  B23K26/53 ,  B23K103/00

Abstract: An optical system for shaping a laser beam includes a beam shaping element configured to receive the laser beam having a transverse input intensity profile and to impose a beam shaping phase distribution onto the laser beam. The optical system further includes a near field optical element, arranged downstream of the beam shaping element at a beam shaping distance and is configured to focus the laser beam into the focus zone. The imposed phase distribution results in a virtual optical image of the elongated focus zone located before the beam shaping element. The beam shaping distance corresponds to a propagation length of the laser beam within which the imposed phase distribution transforms the transverse input intensity profile into a transverse output intensity profile at the near field optical element.

公开(公告)号：US20230211438A1

公开(公告)日：2023-07-06

申请号：US18174689

申请日：2023-02-27

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Daniel Grossmann ,  Marc Sailer ,  Jonas Kleiner

IPC: B23K26/0622 ,  B23K26/067 ,  B23K26/36

CPC classification number: B23K26/0624 ,  B23K26/067 ,  B23K26/36 ,  B23K26/082

Abstract: A method for machining a material using a pulsed laser includes introducing a sequence of laser pulses into the material for machining the material, and synchronizing a start of each sequence with a fundamental frequency of the laser. The sequence of laser pulses comprises at least two different sequence elements that are offset from one another in space and time. Each sequence element comprises an individual laser pulse, a specific succession of individual laser pulses, or a burst of laser pulses. Specific sequence element properties are impressed on each sequence element. The sequence element properties comprise a position of the laser focus of a respective sequence element. The position of the laser focus of each sequence element of the sequence is adapted for each sequence element.

公开(公告)号：US20170276951A1

公开(公告)日：2017-09-28

申请号：US15599623

申请日：2017-05-19

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Daniel Grossmann ,  Daniel Flamm

IPC: G02B27/09 ,  B23K26/0622 ,  B23K26/066 ,  G02B27/42

CPC classification number: G02B27/0944 ,  B23K26/0622 ,  B23K26/0624 ,  B23K26/064 ,  B23K26/066 ,  G02B27/425

Abstract: A diffractive optical beam shaping element for imposing a phase distribution on a laser beam that is intended for laser processing of a material includes a phase mask that is shaped as an area and is configured for imposing a plurality of beam shaping phase distributions on the laser beam incident on to the phase mask. A virtual optical image is attributed to at least one of the plurality of beam shaping phase distributions, wherein the virtual image can be imaged into an elongated focus zone for creating a modification in the material to be processed. Multiple such elongated focus zones can spatially add up and interfere with each other, to modify an intensity distribution in the material and, for example, generate an asymmetric modification zone.

公开(公告)号：US20170252859A1

公开(公告)日：2017-09-07

申请号：US15599720

申请日：2017-05-19

Applicant: TRUMPF Laser- und Systemtechnik GmbH

Inventor： Malte Kumkar ,  Jonas Kleiner ,  Daniel Grossmann ,  Daniel Flamm ,  Myriam Kaiser

IPC: B23K26/00 ,  G02B27/09 ,  B23K26/046 ,  G02B5/00 ,  B23K26/042 ,  B23K26/06 ,  B23K26/073

CPC classification number: B23K26/53 ,  B23K26/042 ,  B23K26/046 ,  B23K26/06 ,  B23K26/064 ,  B23K26/073 ,  G02B5/001 ,  G02B27/095

Abstract: For material processing of a material, which is in particular for a laser beam to a large extent transparent, asymmetric shaped modifications are created transverse to the propagation direction of the laser beam. Thereby, the laser beam is shaped for forming an elongated focus zone in the material, wherein the focus zone is such that it includes at least one intensity maximum, which is transverse flattened in a flattening direction, or a transverse and/or axial sequence of asymmetric intensity maxima, which are flattened in a sequence direction. After positioning the focus zone in the material, a modification is created and the material and the focus zone are moved relative to each other in the or across to the flattening direction or in the or across to the sequence direction for forming a crack along an induced preferred direction.