EP0743128A1 - Procédé et dispositif pour le marquage de produits en matériaux transparents (solides) au moyen d'un laser - Google Patents

Procédé et dispositif pour le marquage de produits en matériaux transparents (solides) au moyen d'un laser Download PDF

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Publication number
EP0743128A1
EP0743128A1 EP96106863A EP96106863A EP0743128A1 EP 0743128 A1 EP0743128 A1 EP 0743128A1 EP 96106863 A EP96106863 A EP 96106863A EP 96106863 A EP96106863 A EP 96106863A EP 0743128 A1 EP0743128 A1 EP 0743128A1
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EP
European Patent Office
Prior art keywords
laser
intensity
concentration range
pulses
pulse
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.)
Granted
Application number
EP96106863A
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German (de)
English (en)
Other versions
EP0743128B1 (fr
Inventor
Stanislovas Balickas
Jonas Gulbinas
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.)
NAICOTEC GmbH
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NAICOTEC GmbH
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Publication date
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Publication of EP0743128A1 publication Critical patent/EP0743128A1/fr
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Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B7/00—Machines, apparatus or hand tools for branding, e.g. using radiant energy such as laser beams

Definitions

  • the present invention relates to a method and a device for the internal marking of products made of solid materials by means of laser, which can be used for the marking of transparent materials, as a result of which a clearly visible, abrasion-resistant identification symbol can be obtained inside the product.
  • a laser marking method which involves the selection of the marking location inside the product to be labeled, the concentration of the bundle of laser beams not absorbed by the product material at the intended location, and the destruction of the product material in the concentration range below Exposure to a beam of a high-energy laser and changes in the position of the concentration range in the interior of the product during the introduction of the mark provided.
  • a device which is used for the implementation of the above-mentioned labeling method is provided, consisting of a laser that generates a bundle of high-energy light beams and has a wavelength that is not absorbed by the material of the product to be labeled, from a focusing device that the bundle of laser beams in the selected area inside the product concentrated, and a device that changes the position of the radiation area to be concentrated in the interior of the product accordingly in order to be able to generate the identifier in the intended form.
  • the disadvantage of the known method and the device is that, with a certain probability, the generated marking can be fuzzy and deformed, since during the destruction of the material inside the product, the material is exposed to the radiation of the high-energy laser, in the cross-section of which the energy density is uniform is distributed, suspended.
  • the maximum energy density of the bundle in the entire focusing range must not be less than 10 J / cm 2 , the power must not be less than 10 7 W / cm 2 and the pulse duration must not be less than 10 -6 s.
  • a bundle of rays with such energy can not only change the mechanical material properties in the focusing area, with the help of which the opaque material that is destroyed and the symbol becomes visible, but this action can also generate internal stresses, which in turn cannot be controlled by the cracks around the focusing area or thread-like , causing penetration on the surface, which reduces the sharpness of the symbol and distorts the shape of the symbol.
  • a laser marking method for the inner marking of products made of solid materials which involves the selection of the marking location inside the product to be labeled, the concentration of the bundle of laser beams not absorbed by the product material at the intended location , the destruction of the product material in the concentration range under the action of high-power pulses from a laser beam, and the change in the position of the concentration range inside the product during the introduction of the marking intended form.
  • a device which is provided for the implementation of the above-mentioned labeling method, consisting of a pulse laser, which generates the pulses of the bundle of high-energy light beams, from a focusing device, which the bundle of laser beams in the selected area inside the Concentrated product and a device that changes the position of the concentration range of the rays inside the product accordingly in order to be able to produce an identifier of the intended shape.
  • the disadvantage of the known method and the device is that, with a certain probability, the marking generated can be blurred and deformed, since during the destruction of the material inside the product under the action of the pulses of the laser beam of high power and equal intensity over the entire bundle cross-section (pulse energy - 50 MJ, pulse duration - 10 -9 s and pulse frequency - 1 Hz) not only the mechanical properties of the destroyed material can be changed, which creates the opacity of the destroyed material and the symbol becomes visible, but this effect can also generate internal tensions, which in turn create uncontrollable cracks around the concentration area and thread-like punctures penetrating to the surface, making the creation of a destroyed circular area of small dimensions impossible, which makes the Symbo Reduces sharpness and distorts the shape of the symbol. It is therefore not possible to use this method and this device to generate identification symbols of very small dimensions, to carry out internal identification in very thin components and to achieve high-contrast inscriptions.
  • the aim of the invention is to develop a laser marking method and a device for transparent materials, which make it possible to produce high-contrast marking symbols of small dimensions inside a transparent material and to carry out the marking in thin walls of a product.
  • the two stages of action are achieved by the action of at least two different laser pulses with different parameters on the material at the selected point, the first or more first pulses changing the resistance of the material to the laser beams in the concentration range and the following or more subsequent pulses changing the material in the mentioned Destroy area.
  • the first group of which changes the material's resistance to laser beams and the following group of pulses causes the destruction of the material in the concentration range it is possible to significantly reduce the energy density of both pulse groups in order to destroy a material area that is visible through the destroyed material structure to create. Since the size of the cracks resulting from the internal stresses around the concentration range is directly proportional to the energy size of the laser pulse, the size of the mentioned cracks also decreases when the energy size of these pulses is reduced. The reduced crack size makes it possible to create circular areas of smaller dimensions of the destroyed material, to shape them closer together and thus to achieve high-contrast identification symbols on the inside of the product.
  • the laser beam can be shaped so that the intensity is greatest at its edges and lowest at the center, i.e. the intensity distribution in the bundle is circular.
  • the effect mentioned is further increased if the shortest wavelength of the laser beam or its harmonics, for which the product material is transparent, is selected.
  • One of the variants of the proposed method is to choose the intensity of one or a few first laser pulses so that the concentration of the laser beam in its concentration range changes the resistance of the material to the laser radiation, and the intensity of one or a few subsequent pulses is less than that of the one or some the first pulse is chosen, but in such a way that it destroys the material in the area in which the resistance of the material to the laser radiation decreased due to the action of the first (the first) pulse.
  • the laser marking method according to the invention also includes actions by which, after assessing the reduction in the degree of resistance of the material achieved by the first (at least one) pulse, the parameters of the subsequent pulse, i.e. the energy density of the pulses (intensity), the number of pulses, the pulse duration and the pulse frequency can be selected.
  • Such a case occurs when the reduction in the degree of resistance of the material caused by the first or a few first pulses is determined according to the strength (intensity) of the acoustic wave propagating from the concentration range of the laser beam.
  • the reduction in the degree of resistance of the material caused by the first or a few first pulses is determined according to the luminous intensity of the concentration range of the laser beam.
  • the shape of the destroyed material area is also controlled by changing the number, intensity, duration and repetition frequency of the laser pulses.
  • a controllable converter of the laser pulse parameters has been developed, which changes the pulse parameters depending on the change in the material parameters in the concentration range of the laser pulses, introduced.
  • the proposed device has a radiation system distributing the intensity of the beam, which is located on the path of the beam between the pulse laser and the focusing device and forms the distribution of the intensity of the laser beam in such a way that the greatest intensity at the edges of the beam and the lowest can be found in its center.
  • the proposed device has a pulse laser, which generates a beam with the shortest possible wavelength from the area in which the product material is transparent, or with a wavelength of the corresponding harmonic.
  • the system for forming the intensity of the beam consists of a telescope that widens the wine laser beam and a non-transparent disk-shaped screen that covers the central part of the widened beam.
  • the system for forming the intensity of the beam consists of two identical conical optical parts, which are arranged with their conical base area to one another.
  • controllable converter of the laser pulse parameters is a photo converter, which registers the glow of the plasma in the concentration range of the laser beam and sends the electrical signal, which controls the laser pulse parameters depending on the light intensity, to the control block.
  • controllable transducer of the laser pulse parameters is an acoustic transducer that registers the acoustic wave propagating out of the concentration range of the laser beam and directs the electrical signal that controls the laser pulse parameters as a function of the intensity of the acoustic wave to the control block .
  • control block which regulates the energy density (intensity), the duration, the number, the repetition frequency of the laser pulses as a function of the material parameters in the concentration range of the laser beam.
  • FIG. 1 One of the variants of the device that implements the proposed method is outlined in FIG. 1.
  • This device consists of the pulse laser 1, a focusing device 3 located on the path of its beam 2 for concentrating the laser beam 2 in the selected concentration range 4, which is located inside the transparent product material 5 intended for identification.
  • the device has a movable platform 6 on which the product 5 is fastened and as a result of which its position can be changed together with the platform 6.
  • a controller 7 is connected to the movable platform 6 and the pulse laser 1 in order to coordinate their functions with the aim of achieving the desired shape of the identification symbol.
  • the device has a controllable converter 8 of the pulse parameters, which can be a photo converter, for example. This photo converter reacts to the glowing of the material in the concentration range 4 and is connected to the pulse laser 1 by the control block 9.
  • the transducer 8 can also be an acoustic transducer that reacts to the acoustic waves propagating from the material in the concentration range 4 and is connected to the pulse laser 1 by the control block 9.
  • the product 5 made of transparent material selected for identification can consist of transparent or colored glass, of optical crystal or of organic glass.
  • the product material must not absorb the laser beam.
  • Laser 1 can, for example, be a solid-state pulse laser, e.g. Nd-YAG laser or a frequency-multiplied xenon fluoride eximer laser.
  • the laser output energy must be approximately 50 MJ, the pulse frequency 1 Hz, the pulse duration 10 -9 .
  • the wavelength of the laser beam or its harmonics is selected in the interval in which the product material is transparent; in the best case, the shortest wavelength is selected in this interval.
  • the concentration range 4 of the laser beam is selected by means of the focusing device 3 and the movable platform 6.
  • One or a few first laser pulses are emitted, and their effect on the material in the concentration range 4, for example by means of an optical converter 8, is registered. If there is no signal at the output of the optical converter 8, the intensity of the first laser pulses is increased until the material changes occur in the concentration range, but the material has not yet been destroyed.
  • the electrical signal produced at the output of the optical converter is then passed on to the control block, which in turn determines the parameters of the next pulses in such a way that the material in the concentration range is destroyed by the action of the first pulses, i.e. that the opacity, ascertainable as a light-diffusing area, is formed.
  • the controllable parameter of the laser pulses is the pulse intensity
  • the intensity of the following pulses is less than that of the first pulses.
  • the controller 7 forwards the signal to the movable platform 6, and the concentration range of the laser beam is thus directed to another location in the product in accordance with the identification symbol. Analogous to the case described, the material is then destroyed in the new concentration range.
  • FIG. 2 shows another variant of the device which has the same device details as the device shown in FIG. 2, but additionally has a formation system 10 which is provided for the distribution of the intensity of the laser pulses and is located on the path of the beam 2 is located between the pulse laser 1 and the focusing device 3.
  • This intensity distribution formation system 10 distributes the intensity of the laser beams in the beam in such a way that the greatest intensity is at the edges of the beam and the lowest in its center.
  • the laser beam falling on the lens of the focusing device is ring-shaped, and with a concentration of such a shaped beam in the selected product area and when the material destruction described above is carried out in two stages, an even greater contrast and smaller dimensions of the identification symbol are achieved because the first or more first impulses change the resistance of the material to the laser beams in the concentration range and the following or several subsequent impulses destroy the material in the area mentioned.
  • the formation system which is provided for the distribution of the intensity of the laser pulses, is shown in FIG.
  • the small, non-widened laser beam 2 arrives in a widening telescope 11, in the interior of which optical components shown by the box 12 are arranged. It is preferably a biconcave and a biconvex lens.
  • the broadened beam 2 ' is focused in the concentration range.
  • a first region 14 and a second region 15 are shown in the beam direction, in which there are different intensity distributions in the laser beam.
  • the beam diameter d is plotted over the intensity I in accordance with the diagram generally designated 16, then an intensity distribution in the beam corresponding to the shape shown in diagram 16 results for the first region 14 between the pulse laser 1 and the screen 13.
  • This is essentially a kind of Gaussian distribution.
  • the intensity peak is removed from the center of the broadened beam 2 ′ by the screen 13, so that the intensity distribution shown generally at 17 results in the second region 15.
  • the intensity distribution of the laser beam 2 ′ falling on the focusing device 3 becomes annular.
  • the telescope 11 of Figure 3 can also be replaced by another embodiment.
  • the telescope 11 preferably consists of two identical conical optical parts arranged with their conical base area to one another. Such a formation system does not require the screen 13.
  • FIG. 4 A further variant of the device is shown in FIG. 4, in which the same reference numbers as in FIGS. 1 and 2 are used for the same parts.
  • the device provided for changing the position of the concentration range is a movable platform 6 only for the x direction.
  • a movable mirror system which is shown in the housing 18, is used for the other two directions y and z.
  • the beam 2 strikes a flat, hundred percent mirror 19 in the z direction.
  • the mirror 19 is set at 45 ° and thereby directs the beam in the y direction, perpendicular to the z direction, onto a second, also flat, hundred percent mirror 20.
  • this mirror 20 is set at 45 ° to the y direction and redirects the beam again in the z direction. From there, the beam of rays passes through the focusing device 3 to the concentration area 4, as in the other embodiments.
  • the concentration range 4 also shifts in the z direction by the same amount (to the right in FIG. 4). If the second mirror 20 is moved in the y direction (without further displacement of the first mirror 19 but with a simultaneous displacement of the focusing device), then the concentration range 4 is also moved upward by the same amount in the y direction.
  • the third x coordinate can be adjusted using the movable platform 6. In the embodiment shown in FIG. 4, this is shifted linearly perpendicular to the paper plane in the viewing direction or in the opposite x direction. This gives you a three-dimensional labeling option.
  • a third level hundred percent mirror (which is not shown) can also be used instead of the platform 6.
  • the third mirror mentioned would be set at 45 ° to the y direction and the x direction. If this third mirror is moved together with the focusing device 3 in the x direction, i.e. 4, the concentration range 4 also shifts in the x direction.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laser Beam Processing (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Laser Beam Printer (AREA)
  • Dot-Matrix Printers And Others (AREA)
EP96106863A 1995-05-12 1996-05-01 Procédé et dispositif pour le marquage de produits en matériaux transparents (solides) au moyen d'un laser Expired - Lifetime EP0743128B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LT95-051A LT4108B (en) 1995-05-12 1995-05-12 Method and apparatus for laser marking of products from transparent materials
LT9500051 1995-05-12

Publications (2)

Publication Number Publication Date
EP0743128A1 true EP0743128A1 (fr) 1996-11-20
EP0743128B1 EP0743128B1 (fr) 2002-02-27

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EP96106863A Expired - Lifetime EP0743128B1 (fr) 1995-05-12 1996-05-01 Procédé et dispositif pour le marquage de produits en matériaux transparents (solides) au moyen d'un laser

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EP (1) EP0743128B1 (fr)
AT (1) ATE213681T1 (fr)
DE (1) DE59608777D1 (fr)
LT (1) LT4108B (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19728766C1 (de) * 1997-07-07 1998-12-17 Schott Rohrglas Gmbh Verwendung eines Verfahrens zur Herstellung einer Sollbruchstelle bei einem Glaskörper
DE19925801A1 (de) * 1999-06-03 2000-12-21 Fraunhofer Ges Forschung Verfahren und Vorrichtung zur regelbaren Veränderung der Punktgröße bei der Laser-Innengravur
EP1138516A2 (fr) * 2000-03-29 2001-10-04 Vitro Laser GmbH Procédé pour former une gravure dans la masse d'un corps plat et appareil pour la réalisation dudit procédé
US6333486B1 (en) 2000-04-25 2001-12-25 Igor Troitski Method and laser system for creation of laser-induced damages to produce high quality images
US6399914B1 (en) 2000-07-10 2002-06-04 Igor Troitski Method and laser system for production of high quality laser-induced damage images by using material processing made before and during image creation
US6417485B1 (en) 2000-05-30 2002-07-09 Igor Troitski Method and laser system controlling breakdown process development and space structure of laser radiation for production of high quality laser-induced damage images
US6426480B1 (en) 2000-08-30 2002-07-30 Igor Troitski Method and laser system for production of high quality single-layer laser-induced damage portraits inside transparent material
US6490299B1 (en) 2000-07-20 2002-12-03 Troitski Method and laser system for generating laser radiation of specific temporal shape for production of high quality laser-induced damage images
US6509548B1 (en) 2000-10-04 2003-01-21 Igor Troitski Method and laser system for production of high-resolution laser-induced damage images inside transparent materials by generating small etch points
US6630644B2 (en) 2002-02-19 2003-10-07 Troitski Method creating damage arrangement for production of 3D laser-induced damage portraits inside transparent materials
US6664501B1 (en) * 2002-06-13 2003-12-16 Igor Troitski Method for creating laser-induced color images within three-dimensional transparent media
US6720523B1 (en) * 2002-09-23 2004-04-13 Igor Troitski Method for production of laser-induced images represented by incomplete data, which are supplemented during production
US6727460B2 (en) 2002-02-14 2004-04-27 Troitski System for high-speed production of high quality laser-induced damage images inside transparent materials
US6740846B1 (en) 2003-03-27 2004-05-25 Igor Troitski Method for production of 3D laser-induced head image inside transparent material by using several 2D portraits
US6768080B2 (en) * 2001-12-17 2004-07-27 Troitski Method for production of laser-induced damage images with special characteristics by creating damages of special space shape
WO2005054841A1 (fr) * 2003-12-02 2005-06-16 Mtu Aero Engines Gmbh Procede, dispositif et eprouvette pour tester un element structurel, ainsi qu'utilisation du procede et du dispositif

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8541105B2 (en) 2005-08-18 2013-09-24 Oerlikon Trading Ag, Trubbach Transparent substrates with dielectric layer having a marking below the surface of the transparent substrate

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092528A (en) * 1975-06-18 1978-05-30 Cibie Projecteurs Accessory headlamp mountings
WO1992003297A1 (fr) * 1990-08-15 1992-03-05 United Distillers Plc Procede de marquage en-dessous de la surface
JPH0471792A (ja) * 1990-07-10 1992-03-06 Fujitsu Ltd マーキング方法
EP0481388A2 (fr) * 1990-10-19 1992-04-22 GAO Gesellschaft für Automation und Organisation mbH Support de données en forme de carte avec plusieurs couches et procédé pour sa fabrication
WO1994014567A1 (fr) * 1992-12-18 1994-07-07 Firebird Traders Ltd. Procede et appareil de gravure d'une image dans un article solide
JPH0776167A (ja) * 1993-09-08 1995-03-20 Miyachi Technos Kk レーザマーキング方法
DE4407547A1 (de) * 1994-03-07 1995-09-21 Swarovski & Co Körper aus transparentem Material mit einer Markierung und Verfahren zu dessen Herstellung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092528A (en) * 1975-06-18 1978-05-30 Cibie Projecteurs Accessory headlamp mountings
JPH0471792A (ja) * 1990-07-10 1992-03-06 Fujitsu Ltd マーキング方法
WO1992003297A1 (fr) * 1990-08-15 1992-03-05 United Distillers Plc Procede de marquage en-dessous de la surface
EP0481388A2 (fr) * 1990-10-19 1992-04-22 GAO Gesellschaft für Automation und Organisation mbH Support de données en forme de carte avec plusieurs couches et procédé pour sa fabrication
WO1994014567A1 (fr) * 1992-12-18 1994-07-07 Firebird Traders Ltd. Procede et appareil de gravure d'une image dans un article solide
JPH0776167A (ja) * 1993-09-08 1995-03-20 Miyachi Technos Kk レーザマーキング方法
DE4407547A1 (de) * 1994-03-07 1995-09-21 Swarovski & Co Körper aus transparentem Material mit einer Markierung und Verfahren zu dessen Herstellung

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 16, no. 278 (M - 1268) 22 June 1992 (1992-06-22) *
PATENT ABSTRACTS OF JAPAN vol. 95, no. 006 31 July 1995 (1995-07-31) *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890554B1 (fr) * 1997-07-07 2002-01-02 Schott-Rohrglas GmbH Procédé de fabrication d'un endroit de casse à un corps en verre
EP0890554A2 (fr) * 1997-07-07 1999-01-13 Schott-Rohrglas GmbH Procédé de fabrication d'un endroit de casse à un corps en verre
US6055829A (en) * 1997-07-07 2000-05-02 Schott Glas Process for producing a desired breaking point on a glass body
DE19728766C1 (de) * 1997-07-07 1998-12-17 Schott Rohrglas Gmbh Verwendung eines Verfahrens zur Herstellung einer Sollbruchstelle bei einem Glaskörper
DE19925801A1 (de) * 1999-06-03 2000-12-21 Fraunhofer Ges Forschung Verfahren und Vorrichtung zur regelbaren Veränderung der Punktgröße bei der Laser-Innengravur
DE19925801B4 (de) * 1999-06-03 2005-03-10 Fraunhofer Ges Forschung Verfahren und Vorrichtung zur regelbaren Veränderung der Punktgröße bei der Laser-Innengravur
EP1138516A3 (fr) * 2000-03-29 2003-07-23 Vitro Laser GmbH Procédé pour former une gravure dans la masse d'un corps plat et appareil pour la réalisation dudit procédé
EP1138516A2 (fr) * 2000-03-29 2001-10-04 Vitro Laser GmbH Procédé pour former une gravure dans la masse d'un corps plat et appareil pour la réalisation dudit procédé
US6333486B1 (en) 2000-04-25 2001-12-25 Igor Troitski Method and laser system for creation of laser-induced damages to produce high quality images
US6734389B2 (en) 2000-05-30 2004-05-11 Igor Troitski Method and laser system controlling breakdown process development and space structure of laser radiation for production of high quality laser-induced damage images
US6417485B1 (en) 2000-05-30 2002-07-09 Igor Troitski Method and laser system controlling breakdown process development and space structure of laser radiation for production of high quality laser-induced damage images
US6399914B1 (en) 2000-07-10 2002-06-04 Igor Troitski Method and laser system for production of high quality laser-induced damage images by using material processing made before and during image creation
US6768081B2 (en) 2000-07-10 2004-07-27 Igor Troitski Method and laser system for production of high quality laser-induced damage images by using material processing made before and after image creation
US6490299B1 (en) 2000-07-20 2002-12-03 Troitski Method and laser system for generating laser radiation of specific temporal shape for production of high quality laser-induced damage images
US6426480B1 (en) 2000-08-30 2002-07-30 Igor Troitski Method and laser system for production of high quality single-layer laser-induced damage portraits inside transparent material
US6509548B1 (en) 2000-10-04 2003-01-21 Igor Troitski Method and laser system for production of high-resolution laser-induced damage images inside transparent materials by generating small etch points
US6768080B2 (en) * 2001-12-17 2004-07-27 Troitski Method for production of laser-induced damage images with special characteristics by creating damages of special space shape
US6727460B2 (en) 2002-02-14 2004-04-27 Troitski System for high-speed production of high quality laser-induced damage images inside transparent materials
US6630644B2 (en) 2002-02-19 2003-10-07 Troitski Method creating damage arrangement for production of 3D laser-induced damage portraits inside transparent materials
US6664501B1 (en) * 2002-06-13 2003-12-16 Igor Troitski Method for creating laser-induced color images within three-dimensional transparent media
US6720523B1 (en) * 2002-09-23 2004-04-13 Igor Troitski Method for production of laser-induced images represented by incomplete data, which are supplemented during production
US6740846B1 (en) 2003-03-27 2004-05-25 Igor Troitski Method for production of 3D laser-induced head image inside transparent material by using several 2D portraits
WO2005054841A1 (fr) * 2003-12-02 2005-06-16 Mtu Aero Engines Gmbh Procede, dispositif et eprouvette pour tester un element structurel, ainsi qu'utilisation du procede et du dispositif
US7743639B2 (en) 2003-12-02 2010-06-29 Mtu Aero Engines Gmbh Method, device, and test specimen for testing a part, and use of the method and device

Also Published As

Publication number Publication date
DE59608777D1 (de) 2002-04-04
ATE213681T1 (de) 2002-03-15
LT4108B (en) 1997-01-27
LT95051A (en) 1996-11-25
EP0743128B1 (fr) 2002-02-27

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