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WO1996010777A1 - Procede et appareil permettant d'effectuer plusieurs gravures identiques a l'aide d'un faisceau laser - Google Patents

Procede et appareil permettant d'effectuer plusieurs gravures identiques a l'aide d'un faisceau laser Download PDF

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Publication number
WO1996010777A1
WO1996010777A1 PCT/SE1995/001124 SE9501124W WO9610777A1 WO 1996010777 A1 WO1996010777 A1 WO 1996010777A1 SE 9501124 W SE9501124 W SE 9501124W WO 9610777 A1 WO9610777 A1 WO 9610777A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser beam
mirror
sub beams
incident
engravings
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.)
Ceased
Application number
PCT/SE1995/001124
Other languages
English (en)
Inventor
Sven-Olov Roos
Ulf Sandström
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.)
Permanova Lasersystem AB
Original Assignee
Permanova Lasersystem AB
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 Permanova Lasersystem AB filed Critical Permanova Lasersystem AB
Publication of WO1996010777A1 publication Critical patent/WO1996010777A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • B23K26/0608—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams in the same heat affected zone [HAZ]
    • 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
    • B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C11/00—Auxiliary processes in photography
    • G03C11/02—Marking or applying text

Definitions

  • This invention relates to a method and an apparatus for making a multiple of identical engravings by means of a laser beam.
  • the engravings may be a script or any other graphic design or indicia emplaced on articles, compo ⁇ nents, cinematic films or the like, specifically on such objects on which article numbers, texts, instructions, lo ⁇ gotypes or any other type of information is desired.
  • a system for applying a script or other indicia on cinema ⁇ tic film by means of a laser beam is previously described in US-PS 4,854,696.
  • a UV pulse (excimer) laser beam 10 of adequate beam dimensions, modified by me ⁇ ans of lenses 2 passes through a mask 13 which contains the indicia to be printed on the film.
  • the mask When the beam has emerged from the mask it is projected by lenses 6 and 6a to concentrate the beam on a small spot on the actual film.
  • the mask also contains the information required to coordinate the system.
  • the la ⁇ ser beam is divided into a number of separate beams by me ⁇ ans of rotatable mirrors as illustrated in figures 3 and 4.
  • four rotatable mirrors 304 are placed in the path of the laser beam for continuously deflecting the incident laser beam to the four copies 307 of the film so that each of the film copies is provided with the same indicia.
  • different indicia can be applied to each of the film copies, for instance different languages.
  • each film copy has its own mask as illustrated in fi- gure 4.
  • the laser beam is deflected by means of rotatable mirrors 404 into separate beams that goes to each film copy.
  • the received laser beam is divided into a multiple of separate beams which are incident on the galvanometer mirrors under different angles. If for example the imping ⁇ ing laser beam is divided into two separate beams each of these beams are incident on the galvanometer mirror under its own angle. This means that the two beams are focused on different located points on the object surface, which points are separated by a specific distance. If now also a controlled movement is imposed upon the mirrors, these points are also subject to a synchronous movement but still separated from each other by said distance.
  • the advantages of such a system is that no movement of the mirrors or any other component in the system, besides the text generating movement, is required.
  • the mirrors can be made so small that a high engraving speed can be maintai- ned even for complicated patterns.
  • the mirrors can be made small because the separated beams can be put together, or almost put together, on the mirror surface. The only re ⁇ quirement is that they are impinging the mirror surface under different incident angles.
  • the received laser beam is divided into separate beams by me ⁇ ans of semi-transparent mirrors and then the separated be ⁇ ams are brought together by another mirror.
  • the received laser beam is divided into separate beams by means of a chinoform in which the individual beams have the same power.
  • Figure 1 illustrates schematically a conventional engra ⁇ ving system using a laser beam
  • Figure 2 illustrates schematically how text can be genera ⁇ ted in such an engraving system
  • Figure 3 illustrates schematically how a multiple of iden- tical engravings can be generated according to the inven ⁇ tion
  • Figure 4 illustrates a first embodiment of the invention for dividing the incident laser beam into separate beams
  • Figure 5 illustrates a second embodiment of the invention for separating the incident laser beam.
  • Figure I schematically illustrates a conventional engra ⁇ ving system in which the engravings are generated by means of a laser beam which is focused on a support surface 1 on which the engravings in the form of a script or any other type of graphic design or indicia are to be applied on an article, component, cinematic film or the like.
  • the script or indicia might be in the form of arti ⁇ cle numbers, texts, instructions, logotypes or the like.
  • a UV pulse (excimer) laser beam 2 can be used, which beam is first deflected by a galvanometer mirror 3 and then arranged to pass a lens 4 that concentrates the beam power on a small spot on the support surface.
  • the focused beam spot 5 has to be moved relative to the support surface. This is usually do ⁇ ne as illustrated in figure 2, i.e. by making the mirror 3 rotatable about an axis 6. If the mirror is rotated a certain angle a, the focused spot 5 on the base surface will move a distance 2*a*f where f is the focal distance of the lens 4.
  • the deflection of the laser be ⁇ am is accomplished by means of two mirrors in order to de ⁇ flect the beam in two coordinates. In the figures, howe ⁇ ver, only one of these two mirrors is illustrated. By con ⁇ trolling the angular movement of the two mirrors it is un- derstood that a desired text can be generated on the sup ⁇ port surface 1.
  • Figure 3 illustrates two different laser beams that im ⁇ pinges on the mirror 3, one beam 2a indicated by a conrin- uous line and one beam 2b indicated by dashed lines. There is a specific angle b between these two beams so that they are impinging on the mirror surface under different angles of incidence. This means that the two beams will be focu ⁇ sed on different points on the base surface which points are separated by a specific distance b*f, where f is the focal distance of the focusing lens. If now an angular mo ⁇ vement is applied on the mirror 3, both of the points will be moved synchronously on the base surface and maintained separated by said distance b*f.
  • the laser beam emerging from the laser source is divided into two separa ⁇ te laser beams 2a and 2b by means of a semi-transparent mirror 6.
  • the beams should impinge upon the sa- me galvanometer mirror 3 the beams must be brought toget ⁇ her, which is accomplished by an additional mirror 7. in order to maintain a high engraving speed the mirrors should be made as small as possible. Therefore it is an advantage that the two laser beams are brought together, or at least almost brought together, i.e.
  • the beams are impinging upon the mirror surface under different angles of incidence on substantially the same place on the mirror surface.
  • the mirror 7 is placed in the path of the laser beam 2a for deflecting the laser beam so that the two separated laser beams meet on substantially the same area of the rotatable mirror surface 3.
  • semi-transparent mirrors 6 as illustrated in the fi ⁇ gure it is also possible to use mirrors which are only partially put into the path of the laser beam for provi- ding separated laser beams.
  • Still another way to provide separated laser beams is to use polarizing components.
  • FIG 5 another example how to divide a laser beam in ⁇ to a number of separate sub beams is illustrated.
  • a chinoform 8 is used for the division of an incident laser beam into three separate beams 2e, 2f and 2g. Chino- forms are known per se and will not be described here.
  • the invention makes it possible to effectuate two or more identical engravings simultaneously as already described, i.e. by dividing the incident laser beam into a number of separate sub beams, which sub beams then are arranged to impinge upon the surface of the galvanometer mirror, or galvanometer mirrors in case of a two-dimensional system, under different angles of incidence.
  • the articles on which the engravings are to be applied are disposed on a distan ⁇ ce b*f from each other in such a way that the individual beams are focused on each of the articles.
  • the engravings are then effectuated synchronously by controlling the angular movement of the galvanic mirrors according to a specific pattern determined by the text in question.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Laser Beam Processing (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

Procédé et appareil permettant d'effectuer plusieurs gravures identiques à l'aide d'un faisceau laser (2). Dans ledit procédé, la puissance du faisceau laser est concentrée sur une petite zone de la surface de l'objet et le faisceau laser est dévié dans au moins une, mais de préférence deux dimensions à l'aide d'au moins un miroir rotatif (3) commandé selon une configuration prédéterminée de manière à ce qu'un texte ou tout autre motif graphique soit produit par le faisceau laser sur l'objet sur lequel le texte doit être appliqué. Le faisceau laser incident est divisé en un certain nombre de sous-faisceaux (2a, 2b, 2c, 2d, 2e) individuels avant la déflexion et lesdits faisceaux laser individuels sont disposés de manière à heurter le miroir rotatif (3) selon différents angles d'incidence si bien que la différence angulaire entre les faisceaux individuels définit la distance entre les gravures individuelles.
PCT/SE1995/001124 1994-10-04 1995-10-03 Procede et appareil permettant d'effectuer plusieurs gravures identiques a l'aide d'un faisceau laser Ceased WO1996010777A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9403349A SE503496C2 (sv) 1994-10-04 1994-10-04 Metod och anordning för att utföra flera identiska graveringar med hjälp av en laserstråle
SE9403349-5 1994-10-04

Publications (1)

Publication Number Publication Date
WO1996010777A1 true WO1996010777A1 (fr) 1996-04-11

Family

ID=20395472

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001124 Ceased WO1996010777A1 (fr) 1994-10-04 1995-10-03 Procede et appareil permettant d'effectuer plusieurs gravures identiques a l'aide d'un faisceau laser

Country Status (2)

Country Link
SE (1) SE503496C2 (fr)
WO (1) WO1996010777A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10122335C1 (de) * 2001-05-08 2002-07-25 Schott Glas Verfahren und Vorrichtung zum Markieren von Glas mit einem Laser
DE10133479C1 (de) * 2001-07-10 2002-12-05 Schott Glas Mit einer Kennzeichnung versehene Solarkollektorröhre und Verfahren zum Aufbringen der Kennzeichnung
US8872870B2 (en) 2010-09-02 2014-10-28 Schott Ag Method and apparatus for marking glass

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545144A1 (de) * 1985-12-19 1987-06-25 Johnsdorf Ernst Juergen Verfahren zum aufbringen von schriftzeichen und vorrichtung zur durchfuehrung des verfahrens
US4854696A (en) * 1982-09-06 1989-08-08 Moshe Guez Method and apparatus for placing indicia on cinematic film
EP0464270A1 (fr) * 1989-01-04 1992-01-08 Metatechnics Méthode pour écrire des caractères sur une bande ou une plaque et système pour la mettre en oeuvre
EP0537068A1 (fr) * 1991-10-11 1993-04-14 TITRA FILM Société Anonyme Procédé de sous-titrage de films cinématographiques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854696A (en) * 1982-09-06 1989-08-08 Moshe Guez Method and apparatus for placing indicia on cinematic film
DE3545144A1 (de) * 1985-12-19 1987-06-25 Johnsdorf Ernst Juergen Verfahren zum aufbringen von schriftzeichen und vorrichtung zur durchfuehrung des verfahrens
EP0464270A1 (fr) * 1989-01-04 1992-01-08 Metatechnics Méthode pour écrire des caractères sur une bande ou une plaque et système pour la mettre en oeuvre
EP0537068A1 (fr) * 1991-10-11 1993-04-14 TITRA FILM Société Anonyme Procédé de sous-titrage de films cinématographiques

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10122335C1 (de) * 2001-05-08 2002-07-25 Schott Glas Verfahren und Vorrichtung zum Markieren von Glas mit einem Laser
US6674043B2 (en) 2001-05-08 2004-01-06 Schott Glas Method and apparatus for marking glass with a laser
DE10133479C1 (de) * 2001-07-10 2002-12-05 Schott Glas Mit einer Kennzeichnung versehene Solarkollektorröhre und Verfahren zum Aufbringen der Kennzeichnung
US8872870B2 (en) 2010-09-02 2014-10-28 Schott Ag Method and apparatus for marking glass

Also Published As

Publication number Publication date
SE503496C2 (sv) 1996-06-24
SE9403349L (sv) 1996-04-05
SE9403349D0 (sv) 1994-10-04

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