EP1520198A2 - Machine d'usinage laser - Google Patents

Machine d'usinage laser

Info

Publication number
EP1520198A2
EP1520198A2 EP03763639A EP03763639A EP1520198A2 EP 1520198 A2 EP1520198 A2 EP 1520198A2 EP 03763639 A EP03763639 A EP 03763639A EP 03763639 A EP03763639 A EP 03763639A EP 1520198 A2 EP1520198 A2 EP 1520198A2
Authority
EP
European Patent Office
Prior art keywords
mirror
telescope
laser beam
processing machine
ellipsoid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03763639A
Other languages
German (de)
English (en)
Inventor
Thomas Zeller
Joachim Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Laser und Systemtechnik GmbH
Original Assignee
Trumpf Lasertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trumpf Lasertechnik GmbH filed Critical Trumpf Lasertechnik GmbH
Publication of EP1520198A2 publication Critical patent/EP1520198A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors

Definitions

  • the invention relates to a laser processing machine for processing workpieces by means of a laser beam with a telescope for expanding the laser beam, which has an ellipsoid mirror and a paraboloid mirror, and a method for producing the reflecting surfaces of the ellipsoid and paraboloid mirrors for such a laser processing machine.
  • An ellipsoid is a 2llip ⁇ iccher ote ⁇ ions örpsr, which is formed by rotation of an ellipse around an axis of rotation, especially around one of the ⁇ liipseen half axes, and is characterized by two focal lengths.
  • an ellipsoid mirror is understood to be a mirror whose mirror surface is designed as an ellipsoid segment.
  • a paraboloid is a parabolic body of revolution that is created by rotating a parabola around an axis of rotation, especially around the axis of symmetry of the parabola, and is characterized by a focal length.
  • a paraboloid mirror is understood below to mean a mirror whose mirror surface is designed as a paraboloid segment.
  • movable optics are arranged in front of the deflecting mirrors (scanner mirrors), by means of which the focus position of the laser beam is varied. Since the laser beam is expanded at the same time in order to achieve a small focus diameter, movable telescopes with transmissive optics are used for low powers and telescopic systems with an ellipsoid mirror and a paraboloid mirror, which are usually designed as metal optics, are used for high powers.
  • the invention is therefore based on the object of reducing the effort required for adjusting the ellipsoid and paraboloid levels in a laser processing machine of the type mentioned.
  • the axes of rotation of the ellipsoid mirror and the paraboloid mirror run parallel to one another, in particular collinearly.
  • the focal point of the paraboloid mirror preferably coincides with a focal point of the ellipsoid mirror. Due to the parallel and in particular ollinear alignment of the two mirrors, the reflecting surfaces of the two mirrors can be produced in a single clamping (for example by turning the diamond) so precisely that subsequent adjustment is no longer necessary. Therefore, in particularly preferred embodiments of the invention, the ellipsoid mirror and the paraboloid mirror are mutually immovable, that is to say arranged without any adjustment device. For example, before the reflecting surfaces of the two mirrors are manufactured, the mirror blanks can be mounted on a common carrier element and remain permanently fixed there.
  • optical axes of the laser beam incident in the telescope and of the laser beam emerging from the telescope preferably run parallel to one another. This measure has the advantage that the telescope can be moved parallel to the optical axis of the laser beam incident on the telescope, either in the same or opposite direction of the incident laser beam.
  • the telescope has an additional mirror which aligns the optical axis of the laser beam incident in the telescope parallel to the optical axis of the laser beam emerging from the telescope. This measure enables the telescope to be moved in the direction of the incident or emerging laser beam without additional optics being required in the beam path of the laser light.
  • the additional mirror is preferably arranged in the beam path in front of the paraboloid mirror.
  • the reflecting surfaces of the ellipsoidal mirror and the paraboloidal mirror can be produced in a single clamping by means of a processing machine, the axis of rotation of which, when producing the reflecting surfaces of the two mirrors, is collinear with their axes of rotation.
  • Fig. 1 with a first embodiment of the telescope according to the invention
  • FIG. 2 shows a second exemplary embodiment of the telescope according to the invention in a representation analogous to FIG. 1; 3 shows a third exemplary embodiment of the telescope according to the invention in a representation analogous to FIG. 1; 4 shows a fourth exemplary embodiment of the telescope according to the invention in a representation analogous to FIG. 1; and
  • Fig. 5 shows the telescope according to the invention with a common support element for the ellipsoid and the paraboloid mirror.
  • the telescope 1 shown in FIG. 1 is one in front of the scanner mirrors
  • Laser processing machine arranged and serves both to expand the laser beam 2 of the laser processing machine and to vary the focus position of the laser beam 2.
  • the telescope 1 comprises a concave ellipsoid mirror 3, a convex paraboloid mirror 4 and a flat additional mirror 5.
  • the ellipsoid and paraboloid mirrors 3, 4 have a collinear axis of rotation 6 and are arranged such that they cannot be adjusted relative to one another.
  • the ellipsoid mirror 3 with its two focal points is characterized by the two focal lengths ⁇ , f 2 and the paraboloid mirror 4 with its one focal point by the focal length f 3 .
  • the focal point of the paraboloid mirror 4 coincides with a focal point of the ellipsoid mirror 3.
  • the paraboloid mirror 4 is concave and the additional mirror 5 is oriented differently around the incident laser beam 7 or its optical axis 10 parallel to the optical axis 9 of the emerging laser beam 8 align.
  • the telescope 1 of FIG. 3 differs from the telescope 1 of FIG. 1 in that the additional mirror 5 aligns the incident laser beam 7 or its optical axis 10 parallel to the optical axis 9 and in the opposite direction of the emerging laser beam 8.
  • the additional mirror 5 is arranged such that the optical axis 10 of the incident laser beam 7 is directed at right angles to the optical axis 9 of the emerging laser beam 8.
  • the ellipsoid and paraboloid mirrors 3, 4 are immovably fixed to one another on a carrier element 12, specifically before
  • the axis of rotation of the processing machine in which the carrier element 12 is clamped with the mirror blanks, runs collinearly with the axis of rotation 6 thereof (not shown in FIG. 5) when producing the reflecting surfaces of the two mirrors 3, 4.
  • the additional mirror 5 can be fastened separately or likewise on the carrier element 12.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Lenses (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)

Abstract

L'invention concerne une machine d'usinage laser destinée à l'usinage de pièces par un faisceau laser (2). Cette machine comprend un télescope (1) destiné à élargir le faisceau laser (2), un miroir ellipsoïde (3) et un miroir paraboloïde (4) dont les axes de rotation 10 (6) sont parallèles, notamment colinéaires. Ce positionnement permet la fabrication des surfaces réfléchissantes des deux miroirs par un seul serrage (p.ex. par tournage au diamant) avec une précision telle que tout ajustement ultérieur devient superflu.
EP03763639A 2002-07-10 2003-06-14 Machine d'usinage laser Withdrawn EP1520198A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10230960 2002-07-10
DE10230960A DE10230960B4 (de) 2002-07-10 2002-07-10 Laserbearbeitungsmaschine
PCT/EP2003/006283 WO2004008216A2 (fr) 2002-07-10 2003-06-14 Machine d'usinage laser

Publications (1)

Publication Number Publication Date
EP1520198A2 true EP1520198A2 (fr) 2005-04-06

Family

ID=29796225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03763639A Withdrawn EP1520198A2 (fr) 2002-07-10 2003-06-14 Machine d'usinage laser

Country Status (4)

Country Link
US (1) US7297898B2 (fr)
EP (1) EP1520198A2 (fr)
DE (1) DE10230960B4 (fr)
WO (1) WO2004008216A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004007178B4 (de) * 2004-02-13 2006-01-12 Precitec Kg Laserbearbeitungskopf
EP1695787A1 (fr) * 2005-02-25 2006-08-30 Trumpf Laser- und Systemtechnik GmbH Procédé d'usinage laser utilisant plusieurs stations de travail
DE102007028504B4 (de) 2007-06-18 2009-07-30 Scansonic Mi Gmbh Vorrichtung zum Bearbeiten eines Werkstücks mittels eines Laserstrahls
JP5641958B2 (ja) * 2011-01-31 2014-12-17 ギガフォトン株式会社 チャンバ装置およびそれを備える極端紫外光生成装置
US9374882B2 (en) 2013-12-12 2016-06-21 Asml Netherlands B.V. Final focus assembly for extreme ultraviolet light source
CN105904087A (zh) * 2016-06-26 2016-08-31 上海嘉强自动化技术有限公司 一种反射式高功率双金属振镜扫描系统
DE102016113378B4 (de) * 2016-07-20 2019-10-10 Karl H. Arnold Maschinenfabrik Gmbh & Co. Kg Optisches System für eine Laserbearbeitungsmaschine, Verfahren zum Verstellen eines optischen Systems für eine Laserbearbeitungsmaschine und Laserbearbeitungsmaschine
WO2019219159A1 (fr) * 2018-05-14 2019-11-21 Trumpf Lasersystems For Semiconductor Manufacturing Gmbh Système de focalisation et et dispositif de production de rayonnement euv
EP4031831A1 (fr) 2019-09-20 2022-07-27 NDC Technologies Inc. Systèmes et procédés d'interférométrie laser

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5306892A (en) * 1991-06-22 1994-04-26 Carl-Zeiss-Stiftung Mirror objective arrangement

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674334A (en) * 1971-01-04 1972-07-04 Perkin Elmer Corp Catoptric anastigmatic afocal optical system
US4205902A (en) 1978-10-12 1980-06-03 The Perkin-Elmer Corporation Laser beam expander
US4568982A (en) * 1984-04-09 1986-02-04 At&T Laboratories Optical scanning method and apparatus
US4806728A (en) * 1988-02-01 1989-02-21 Raytheon Company Laser process apparatus
JPH04301613A (ja) * 1991-03-29 1992-10-26 Toshiba Corp ビーム拡大・縮小器
JP2786796B2 (ja) * 1993-06-23 1998-08-13 シャープ株式会社 プロジェクター
GB9321408D0 (en) * 1993-10-16 1993-12-08 British Aerospace Optical apparatus
JP3380416B2 (ja) * 1997-02-05 2003-02-24 本田技研工業株式会社 レーザ溶接装置
US6078420A (en) * 1998-06-24 2000-06-20 Optical Engineering, Inc. Hole-coupled laser scanning system
DE19949198B4 (de) * 1999-10-13 2005-04-14 Myos My Optical Systems Gmbh Vorrichtung mit mindestens einer mehrere Einzel-Lichtquellen umfassenden Lichtquelle
US6789908B2 (en) * 2003-02-07 2004-09-14 The United States Of America As Represented By The Secretary Of The Navy Confocal ellipsoidal mirror system for wide field of view imaging

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5306892A (en) * 1991-06-22 1994-04-26 Carl-Zeiss-Stiftung Mirror objective arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004008216A3 *

Also Published As

Publication number Publication date
WO2004008216A2 (fr) 2004-01-22
DE10230960A1 (de) 2004-01-29
DE10230960B4 (de) 2011-10-06
US20060102603A1 (en) 2006-05-18
WO2004008216A3 (fr) 2004-04-08
US7297898B2 (en) 2007-11-20

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