EP2948266A1 - Reflektierendes optisches element für eine dynamische auslenkung eines laserstrahls sowie ein verfahren zu seiner herstellung - Google Patents
Reflektierendes optisches element für eine dynamische auslenkung eines laserstrahls sowie ein verfahren zu seiner herstellungInfo
- Publication number
- EP2948266A1 EP2948266A1 EP14700920.3A EP14700920A EP2948266A1 EP 2948266 A1 EP2948266 A1 EP 2948266A1 EP 14700920 A EP14700920 A EP 14700920A EP 2948266 A1 EP2948266 A1 EP 2948266A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- reflective element
- solder
- base body
- layer
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0004—Resistance soldering
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
- B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0808—Mirrors having a single reflecting layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/1821—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors for rotating or oscillating mirrors
Definitions
- Reflective optical element for a dynamic deflection of a laser beam and a method for its production
- the invention relates to reflective optical elements for a dynamic deflection of a laser beam and to a manufacturing method for these reflective elements.
- reflective elements are also referred to as scanner mirrors, which can be pivoted by means of a drive about at least one axis.
- Reflecting surface incident laser beam is reflected depending on the angle of incidence and can be deflected by pivoting accordingly and, for example, the focal spot of the laser beam for processing one or two-dimensional deflected. It is obvious that act on a scanner mirror large accelerations during pivoting, since high deflection speeds of the laser beam are desired. Therefore, a reduced net mass of the moving parts of such a reflective element with a correspondingly small
- Mass moment of inertia is an important parameter to be observed. Further requirements for this laser radiation reflecting elements are high reflectivity (relative) for the radiation, a good one
- Scanner levels are currently made with aluminum, beryllium, silicon or silicon carbide.
- the quantities to be produced are limited and large batch sizes do not occur. They are usually metallic
- Basic body used which have a laser radiation reflecting surface.
- the main body show because of the above
- cooling fins are provided to allow cooling to a tolerable temperature. Usually that prepares
- Such a two-part design can not be designed geometrically in optimized form, as there are limits in terms of design and joining technology. It is therefore an object of the invention to provide reflective optical elements for a dynamic deflection of laser beams available, which are less expensive to produce and flexible in their geometric design, so that they achieve improved properties in dynamic operation.
- a surface of a base body and a plate-shaped reflective element are bonded in a materially bonded and planar manner by means of a solder connection.
- the plate-shaped reflective element can be formed from silicon, an optical glass, sapphire, Zerodur or a glass ceramic with a very low coefficient of thermal expansion (ULE).
- the plate-shaped reflective element may be a separate part of a silicon wafer, whose size corresponds to the desired reflective surface. Silicon has a good thermal conductivity, so that an effective cooling can be achieved.
- the base body can be made of a variety of materials or materials. This can be a metal or a ceramic. There is also the possibility of using composite materials or
- the preparation can be carried out using various known production methods. It can also be performed with a rapid prototyping method. Sophisticated geometric shapes can be formed, which can be optimized for the particular application, in particular with regard to the mechanical, dynamic and thermal requirements.
- Brackets for the drive is already integrated / are. It can also be done on the main body Cooling elements, such as cooling fins, or be formed in the main body cooling channels.
- the laser-beam-reflecting surface of the plate-shaped reflective element may be provided with a layer or coating reflecting the laser radiation.
- This may be, for example, an interference layer system adapted to a specific wavelength of the laser radiation to be reflected or a reflective layer
- Surface to be joined surface of the plate-shaped reflective element may be conveniently provided with a wetting layer with which an improved wetting behavior of the solder used can be achieved.
- a wetting layer with which an improved wetting behavior of the solder used can be achieved.
- Reflective element made of silicon - gold, copper, tin, silver or nickel or an alloy thereof can be used for a wetting layer.
- solder This is also the case if, as will be described in more detail below, a solder layer with reactive nanometer multilayers formed over it is to be applied to a surface to be joined.
- Purification may be by ion bombardment or plasma treatment under vacuum conditions.
- Wetting layers can preferably be formed by a PVD method known per se, preferably by magnetron sputtering.
- a PVD method known per se, preferably by magnetron sputtering.
- predetermined layer thicknesses and very high surface finishes can be achieved.
- the latter has a meaning, in particular for the optical properties, in the reflection.
- An insertable in the invention plate-shaped reflective element should have a thickness of less than 1 mm, preferably less than 500 ⁇ , more preferably less than 100 ⁇ . This has the particular advantage that it has a low intrinsic mass and is elastically deformable within limits, so that surface defects during joining and later mechanical stresses can be reduced by different thermal expansion coefficients between the base body and the plate-shaped reflecting element. Very thin plate-shaped elements can be adapted during joining also to a curved surface with a larger radius, whereby the production of concave or convex curved reflecting surfaces on a correspondingly arched surface of a base body is possible.
- the procedure is such that reactive nanometer multilayers and at least one solder layer are formed or arranged there between the respective surface of the base body and the surface of the plate-shaped reflective element.
- the base body and the plate-shaped element are then pressed together with the reactive nanometer multilayers arranged therebetween or there and the at least one solder layer with a pressure force application.
- a pressure in the range of 0.5 MPa to 15 MPa is maintained.
- solder layer and a reactive nanometer multilayer system may be formed directly on the respective surface to be joined of the base body and / or of the plate-shaped reflective element.
- a reactive nanometer multilayer system and optionally also a solder layer can be produced by a PVD method, preferably by magnetron sputtering.
- a reactive nanometer multilayer system can be formed in a manner known per se from alternately arranged layers of two metals, which react exothermically with one another during interdiffusion. In this case, for example, Ni / Al, Ti / Al, Ti / Si, Zr / Al or Zr / Si layers with individual layer thicknesses in the range between 5 nm and 50 nm can form a reactive nanometer multilayer system.
- the number and / or the respectively selected layer thickness of the individual layers can influence the energy released and the temperature which can be used to melt the solder as well as the rate at which the exothermic reaction propagates over the surface of the reactive nanometer multilayer system.
- the respective layer thickness of the layers formed from the individual metals also determines the proportion of the respective metal, which can react exothermically during the interdiffusion.
- the total thickness of a reactive nanometer multilayer system can be in the range between 5 ⁇ to 15 ⁇ .
- the reactive nanometer multilayer system used should be selected so that the melting temperature of the solder used in the exothermic reaction is exceeded, or at least achieved.
- a solder layer can also by another coating method on at least one of the two surfaces to be joined of the base body or the plate-shaped reflective element can be applied. This can be achieved, for example, galvanically.
- a wetting layer may preferably be formed from Au, Cu or Ni.
- a reactive nanometer multilayer system should be used whose surface area exceeds the surface area of the
- Nanometer multilayers is present. As already mentioned, a laser beam can be directed onto this exposed surface area with which sufficient energy input for igniting the exothermic reaction can be achieved. But this can also be done by applying an electrical
- a solder may be used which is selected from pure tin, pure indium, a silver-tin, a gold-tin, a silver-copper-tin, an indium-copper-silver alloy and an aluminum-silicon compound ,
- the layer thickness of a layer of solder should be in the range 5 ⁇ to 15 ⁇ .
- the permanently permissible temperature occurring during operation can be taken into account, which should be below the melting temperature of the solder.
- This temperature is determined by the laser power, the incident beam cross section and the operation of the laser.
- the temperature of a cw-mode laser is greater than that of pulsed operation.
- laser powers of several kW and a continuously operated laser are manageable without any problems.
- a usable in the invention base body can be advantageously prepared by a rapid prototyping method, in which a free three-dimensional shape can be formed and particularly advantageous undercuts and cavities can be formed. Under the lightweight aspect, therefore, filigree structures and very small
- Wall thicknesses can be formed in the range of 0.5 mm.
- Suitable methods are selective laser sintering, in which
- powdered material of the main body forming material is applied in layers and each layer is subjected to a two-dimensionally movable or deflectable laser beam. At the irradiated positions, the material can be sintered together. From the non-irradiated areas of the powdery material can be removed later, so that a three-dimensional body, in which cavities may be present, can be prepared by this method.
- Printing processes can also be used for the production of base bodies, in which a suspension containing the respective base material in powder form is applied in layers in such a way that the desired geometric shape can be produced three-dimensionally. After the application of each individual layer, drying should take place. A finished green body can then be finished sintered during a thermal treatment.
- the printing can be done by screen printing or with a two- or three-dimensionally movable print head, which can be constructed similar to the inkjet printing.
- the main body consists of aluminum and has been brought either by a direct molding process, eg casting or machining in the desired geometric shape.
- a direct molding process eg casting or machining in the desired geometric shape.
- all required elements for cooling and mounting formed directly on the body are all required elements for cooling and mounting formed directly on the body.
- the plate-shaped reflective element a section of a silicon wafer having a thickness of 520 ⁇ m was selected. It had a surface area of 10 * 10 mm 2 . But it can also be a circular plate-shaped reflective element are used, which has an approximately equal area.
- the surface of the plate-shaped reflecting element to be joined to the base body was provided with a wetting layer of nickel with a layer thickness of 500 nm. On this wetting layer, a solder layer of Sn / Ag alloy having a melting temperature of 220 ° C was applied.
- Lot Mrs was coated from the same solder, inserted.
- the two solder layers had a layer thickness of 7 pm.
- Nanometer layer system was formed with alternately arranged metal layers of nickel and aluminum and had a total thickness of 55 ⁇ .
- the individual layers had thicknesses of 20 nm to 30 nm.
- the main body and the plate-shaped reflective element were pressed together with the interposed reactive nanometer multilayer system with a pressure of 10 MPa.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013001417.4A DE102013001417B4 (de) | 2013-01-24 | 2013-01-24 | Reflektierendes optisches Element für eine dynamische Auslenkung eines Laserstrahls sowie ein Verfahren zu seiner Herstellung |
PCT/EP2014/051025 WO2014114591A1 (de) | 2013-01-24 | 2014-01-20 | Reflektierendes optisches element für eine dynamische auslenkung eines laserstrahls sowie ein verfahren zu seiner herstellung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2948266A1 true EP2948266A1 (de) | 2015-12-02 |
Family
ID=49998293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14700920.3A Withdrawn EP2948266A1 (de) | 2013-01-24 | 2014-01-20 | Reflektierendes optisches element für eine dynamische auslenkung eines laserstrahls sowie ein verfahren zu seiner herstellung |
Country Status (4)
Country | Link |
---|---|
US (1) | US9588338B2 (de) |
EP (1) | EP2948266A1 (de) |
DE (1) | DE102013001417B4 (de) |
WO (1) | WO2014114591A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015103494B4 (de) * | 2015-03-10 | 2020-07-16 | Friedrich-Schiller-Universität Jena | Verfahren zur Herstellung eines Reflektorelements und Reflektorelement |
GB201608765D0 (en) * | 2016-05-18 | 2016-06-29 | Adrok Ltd | Methods for determining material and/or subsurface temperatures |
DE102018205786A1 (de) * | 2018-04-17 | 2019-10-17 | Trumpf Laser Gmbh | Scannerspiegel, Scannereinrichtung und Bestrahlungseinrichtung |
CN110716279A (zh) * | 2019-11-09 | 2020-01-21 | 季华实验室 | 一种柔性铝反射镜 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012202047A1 (de) * | 2012-02-10 | 2013-01-17 | Carl Zeiss Smt Gmbh | Zerstörungsfreies stoffschlüssiges Verbinden von Komponenten zur Herstellung von optischen Elementen |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5946125A (en) * | 1998-01-30 | 1999-08-31 | Xerox Corporation | Reflective surface coating for a uniform intensity of a polarized beam of a rotating polygon mirror optical scanning system |
US7003211B2 (en) | 1999-11-15 | 2006-02-21 | Axsun Technologies, Inc. | Optical system production system |
AU2001293366A1 (en) | 2000-04-14 | 2001-10-30 | Cornell Research Foundation, Inc. | Method of designing addressable array for detection of nucleic acid sequence differences using ligase detection reaction |
US20050082343A1 (en) | 2000-05-02 | 2005-04-21 | Jiaping Wang | Method of joining using reactive multilayer foils with enhanced control of molten joining materials |
DE10205425A1 (de) * | 2001-11-09 | 2003-05-22 | Zeiss Carl Smt Ag | Facettenspiegel mit mehreren Spiegelfacetten |
US20030198980A1 (en) | 2001-12-21 | 2003-10-23 | Applera Corporation | Heteroconfigurational polynucleotides and methods of use |
DE10204249A1 (de) * | 2002-02-02 | 2003-08-14 | Zeiss Carl Smt Ag | Spiegelfacette für einen Facettenspiegel |
WO2005052925A2 (en) | 2003-11-24 | 2005-06-09 | Gsi Lumonics Corporation | Improved mirror mounting structures for scanners employing limited rotation motors |
US20060199207A1 (en) | 2005-02-24 | 2006-09-07 | Matysiak Stefan M | Self-assembly of molecules using combinatorial hybridization |
DK2064549T3 (da) | 2006-09-21 | 2013-02-04 | Nestec Sa | Antistof-baserede arrays til detektion af flere signaltransducere i sjældne cirkulerende celler |
US20090062024A1 (en) | 2007-08-27 | 2009-03-05 | Gsi Group Corporation | Mirror Mounting |
DE102011080819A1 (de) * | 2011-08-11 | 2012-09-20 | Carl Zeiss Smt Gmbh | Facettenspiegel aus Facettenmodulen mit mehreren Facetten |
-
2013
- 2013-01-24 DE DE102013001417.4A patent/DE102013001417B4/de not_active Expired - Fee Related
-
2014
- 2014-01-20 US US14/808,975 patent/US9588338B2/en active Active
- 2014-01-20 WO PCT/EP2014/051025 patent/WO2014114591A1/de active Application Filing
- 2014-01-20 EP EP14700920.3A patent/EP2948266A1/de not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012202047A1 (de) * | 2012-02-10 | 2013-01-17 | Carl Zeiss Smt Gmbh | Zerstörungsfreies stoffschlüssiges Verbinden von Komponenten zur Herstellung von optischen Elementen |
Also Published As
Publication number | Publication date |
---|---|
WO2014114591A1 (de) | 2014-07-31 |
DE102013001417A1 (de) | 2014-07-24 |
US9588338B2 (en) | 2017-03-07 |
US20160011413A1 (en) | 2016-01-14 |
DE102013001417B4 (de) | 2016-02-18 |
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Inventor name: HANNWEBER, JAN Inventor name: BRAUN, STEFAN Inventor name: BONSS, STEFFEN Inventor name: DIETRICH, GEORG |
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