WO2003106099A2 - Method for generating iridescence on metallic surfaces - Google Patents
Method for generating iridescence on metallic surfaces Download PDFInfo
- Publication number
- WO2003106099A2 WO2003106099A2 PCT/EP2003/006067 EP0306067W WO03106099A2 WO 2003106099 A2 WO2003106099 A2 WO 2003106099A2 EP 0306067 W EP0306067 W EP 0306067W WO 03106099 A2 WO03106099 A2 WO 03106099A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laser beam
- generating
- preset
- iridescence
- metallic
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000010408 sweeping Methods 0.000 description 4
- 238000004049 embossing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/22—Removing surface-material, e.g. by engraving, by etching
- B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
-
- 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
- B41M5/262—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used recording or marking of inorganic surfaces or materials, e.g. glass, metal, or ceramics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44F—SPECIAL DESIGNS OR PICTURES
- B44F1/00—Designs or pictures characterised by special or unusual light effects
- B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
- B44F1/14—Iridescent effects
Definitions
- Object of the present invention is a method for generating iridescence
- iridescent images can be advantageously employed, in addition to being
- An advantage of the present invention consists in having a wide range of
- FIG. 1 shows a perspective view of a diagram of a first embodiment
- FIG. 2 shows a perspective view of a diagram of a second embodiment
- FIG. 3 shows a perspective view of a diagram of a third embodiment
- FIG. 4 shows a perspective view of a diagram of a fourth embodiment
- reference 1 shows a
- Such apparatus that is able to generate a biased laser beam 2.
- the biased laser beam is made incident on a metalhc target surface 3
- a first way of sweeping is using a
- Figure 4 schematically shows an hybrid system in which, of the two
- the produced grating pitch depends on laser beam slanting incident on
- the target surface and on the wavelength of used laser light are the target surface and on the wavelength of used laser light.
- Such iridescent images can be advantageously used, in addition to
- absorbed energy depends on the biasing plane of the incident laser light with respect to the orientation of the grating on which it is incident
- the technique of the present invention allows realising low-cost
- films with very small diameters (50-70 ⁇ m) for textile uses can be
Abstract
The present invention is a method for generating iridescence on metallic surfaces characterised in that it comprises the use of a biased laser beam which is made incident onto a metallic target surface so that a preset area of said surface is swept or passed by said laser beam with a preset speed and according to a preset path so that the given energy per impacted surface unit is enough to produce a surface material melting with a very limited depth.
Description
DESCRIPTION
METHOD FOR GENERATING IRIDESCENCE ON METALLIC
SURFACES.
Object of the present invention is a method for generating iridescence
on metallic surfaces.
Specifically, but not exclusively, it is useful when applied to realise
iridescent images on metallic manufactured products. In particular such
iridescent images can be advantageously employed, in addition to being
decorative elements, to simply and economically make counterfeit-
preventing markings.
In the counterfeit-preventing sector, holographic figures are currently
used and are composed of complex diffractive elements, also equipped with
3D effects, generated by micro-distortion (through hot or cold embossing
operations) of plastic substrates that afterwards are "mirrored" through
metalization (for example sublimation) in order to generate difl-ractive
elements.
Techniques that are directly used on thin layers of metal or their alloys
are also known and anyway are based on the micro-distortion of metallic
surfaces by embossing with similar techniques to the ones realised on
plastics. Such techniques have as base the creation of a master with very
elaborate systems that can be realised very slowly.
It is known to make complex refractive holographic gratings on
metallic materials such as nickel and aluminium through chemical and
galvanic processes that are very slow (and costly).
It is also known, as undesired result, to generate portion of grating
generated by focused and non-focused laser sources, on semiconductors and
1hin layers of aluminium and nickel and on treated surfaces used as mirrors
for resonating laser cavities. Such type of phenomena is disclosed in the
following publications:
J.E. Sipe et al., "Laser-induced periodic surface structure. I. Theory", Phys.
Rev. B, Vol. 27, pp. 1141 (1983);
J.F. Young et al., "Laser-induced periodic surface structure. Et. Experiment
on Ge, Si, Al, and brass", Phys. Rev. B, Vol. 27, pp. 1155 (1983);
I., Ursu et al., "C02-laser radiation absorption by metal gratings", Appl.
Phys. Lett., Vol. 45, pp. 365 (1984), US 5 057 664.
There are other known techniques accordmg to which a diffractive grating is
generated with a laser beam focused onto a very small spot (even much less
than one μm) and the grating is generated spot by spot. These processes too
usually require long times.
Object of the present invention is simply, quickly and economically realising
images equipped with diffractive power (iridescence) directly on metalhc
manufactured products.
An advantage of the present invention consists in having a wide range of
applications.
Further characteristics and advantages of the present invention will better
appear from the following detailed description of some preferred, but not
exclusive, embodiment of the invention itself, given purely as a non-limiting
example, in the enclosed figures in which:
- figure 1 shows a perspective view of a diagram of a first embodiment;
- figure 2 shows a perspective view of a diagram of a second embodiment;
- figure 3 shows a perspective view of a diagram of a third embodiment;
- figure 4 shows a perspective view of a diagram of a fourth embodiment;
With reference to the above-mentioned figures, reference 1 shows a
laser apparatus that is able to generate a biased laser beam 2. Such apparatus
is preferably of the high energy type with a preset scanning power/speed
ratio, and with a very wide range of wavelengths that can go from far
infrared to extreme ultraviolet.
The biased laser beam is made incident on a metalhc target surface 3
so that a preset area of such metallic surface 3 is swept or passed by such
laser beam with a preset speed and according to a preset path so that the
given energy per impacted surface unit is enough to produce a surface
melting of the material adapted to also record interference phenomena.
To obtain such result, an appropriate 20W laser beam power is
necessary, combined with a suitable sweeping speed included between a few
mm/s and several tenths ofir-m/s.
Under the same other conditions to get the result, such a laser beam
power is necessary as the reflecting power of the affected metallic surface
for such laser radiation becomes greater.
A first way of sweeping, schematically shown in figure 1, is using a
scanner 4 that takes care of moving the laser beam 2.
Other ways are schematically shown in figures 2, 3 and 4.
In particular, in figure 2 the laser beam 2 is unmoving and the
necessary movement is conferred to the metallic target surface that is placed
on a moving plane for such purpose.
In figure 3 the target surface is unmoving and the sweeping motion is
conferred to the laser beam 2 by moving it by means of a moving optics
system 5.
Figure 4 schematically shows an hybrid system in which, of the two
movement components, one is performed by the target surface, that for such
purpose is arranged on a cylinder controlled to rotate around its own axis,
while the other one is performed by the laser beam 2.
The result produced by the sweeping performed according to one of
the described modes is realising a combination of microscopic lines (grating)
whose diffractive characteristics generate an iridescent image when lighted
by white light.
In particular the line orientation of the generated grating depends on
the biasing plane orientation of the laser beam. More specifically, what
occurs is a perpendicular orientation to the biasing plane. "Reading" of the
generated diffractive frame depends on grating orientation.
The produced grating pitch depends on laser beam slanting incident on
the target surface and on the wavelength of used laser light.
It is thereby possible to very simply and quickly realise iridescent
images on various sufficiently smooth metal surfaces.
Such iridescent images can be advantageously used, in addition to
being decorative elements, to simply and economically realise counterfeit-
preventing markings on plates to be applied onto products or directly on
metallic objects and manufactured products.
An interesting and possible application of the invention can be making
real surface treatments of metallic pieces aimed to obtain particular
mechanical properties.
For example, it is possible to treat a metallic surface so that it is
composed of areas affected by gratings characterised by different
orientations so that a following lighting of such surface with a biased laser
light beam produces different heating in various areas due to the fact that the
absorbed energy depends on the biasing plane of the incident laser light with
respect to the orientation of the grating on which it is incident
The production of oriented gratings on metallic surfaces further allows
realising particular friction conditions in contact with other surfaces.
The realisation of metal surfaces with controlled and directional
roughness can be advantageously employed for controlling the micro-
turbulences that are generated in the fluid motion (machine blades like
turbines, etc.).
The presence of such gratings also allows improving the heat
exchange conditions of a metallic surface and, in particular, increasing its
heat dissipation capability.
The technique of the present invention allows realising low-cost
masters to be used for performήig hot micro-embossing on plastic films in
place of traditional systems.
The generation of oriented iridescent gratings on steel wires and/or
films with very small diameters (50-70 μm) for textile uses can be
advantageously used also in the fashion sector. Moreover, tissues made of
such wires can be used as counterfeit-preventing elements in flexible plates
that can be easily sewn onto the different garments.
The invention can be advantageously used for generating oriented
gratings on concave and convex steel dies for hot thermoforniing glass and
polymers.
Obviously numerous practical-application modifications can be made
invention for its construction details without departing from the scope
inventive idea as claimed below.
Claims
1. Method for generating iridescence on metallic surfaces, characterised
in that it comprises the use of a biased laser beam (2) which is made
incident onto a metallic target surface (3) so that a preset area of said
surface is swept or passed by said laser beam with a preset speed and
according to a preset path so that the given energy per impacted surface
unit is enough to produce a surface material melting with a very limited
depth.
2. Apparatus for generating iridescence on metallic surfaces,
characterised in that it comprises: a laser apparatus (1) capable of
generating a biased laser beam (2) and a scanner (4) that takes care of
moving the laser beam (2) to make it incident onto a metallic target
surface (3) so that a preset area of said surface is swept or passed by
said laser beam with a preset speed and according to a preset path and
that the given energy per impacted surface unit is enough to produce a
surface material melting.
3. Apparatus for generating iridescence on metallic surfaces,
characterised in that it comprises: a laser apparatus (1) capable of
generating a biased laser beam (2) that is unmoving; being it provided
that, to the metallic target surface (3), onto which the laser beam is incident, motion is conferred so that a preset area of said surface is
swept or passed by said laser beam (2) with a preset speed and
according to a preset path and that the given energy per impacted
surface unit is enough to produce a surface material melting.
4. Apparatus for generating iridescence on metallic surfaces,
characterised in that it comprises: a laser apparatus (1) capable of
generating a biased laser beam (2) and a moving optics system (5) that
takes care of moving the laser beam (2) to make it incident onto a
metallic target surface (3) so that a preset area of said surface is swept
or passed by said laser beam with a preset speed and according to a
preset path and that the given energy per impacted surface unit is
enough to produce a surface material melting.
5. Method for generating iridescence on metallic surfaces according to any
one of the previous claims and according to what is described and
shown with reference to the enclosed drawing figures and for the
above-mentioned purposes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03740212A EP1519841A2 (en) | 2002-06-14 | 2003-06-10 | Method for generating iridescence on metallic surfaces |
| AU2003276929A AU2003276929A1 (en) | 2002-06-14 | 2003-06-10 | Method for generating iridescence on metallic surfaces |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMO2002A000167 | 2002-06-14 | ||
| IT2002MO000167A ITMO20020167A1 (en) | 2002-06-14 | 2002-06-14 | METHOD FOR GENERATING IRIDESCENCE ON METAL SURFACES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2003106099A2 true WO2003106099A2 (en) | 2003-12-24 |
| WO2003106099A3 WO2003106099A3 (en) | 2004-02-19 |
Family
ID=11451080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2003/006067 WO2003106099A2 (en) | 2002-06-14 | 2003-06-10 | Method for generating iridescence on metallic surfaces |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1519841A2 (en) |
| AU (1) | AU2003276929A1 (en) |
| IT (1) | ITMO20020167A1 (en) |
| WO (1) | WO2003106099A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2724869A1 (en) * | 2011-06-23 | 2014-04-30 | Toyo Seikan Group Holdings, Ltd. | Structure, structure-forming method, and structure-forming device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106151A1 (en) * | 1990-05-02 | 1991-11-07 | Osaka Fuji Kogyo Kk | Producing fine irregular engaged patterns on polished metal surfaces - using interference strips produced by overlapping laterally displaced laser beam with original beam |
| US5817243A (en) * | 1996-10-30 | 1998-10-06 | Shaffer; Wayne K. | Method for applying decorative contrast designs to automotive and motorcycle parts using lasers |
| DE19741998A1 (en) * | 1997-09-24 | 1999-03-25 | Baublys Gmbh | Method of manufacturing and/or processing an embossing tool for coins or medals |
| DE19938446A1 (en) * | 1999-08-13 | 2001-02-15 | Bayerische Motoren Werke Ag | Engraving method involves applying selected gas atmosphere to metal surface area on which laser beam is incident for duration of engraving process to cause coloration of surface |
-
2002
- 2002-06-14 IT IT2002MO000167A patent/ITMO20020167A1/en unknown
-
2003
- 2003-06-10 EP EP03740212A patent/EP1519841A2/en not_active Withdrawn
- 2003-06-10 AU AU2003276929A patent/AU2003276929A1/en not_active Abandoned
- 2003-06-10 WO PCT/EP2003/006067 patent/WO2003106099A2/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106151A1 (en) * | 1990-05-02 | 1991-11-07 | Osaka Fuji Kogyo Kk | Producing fine irregular engaged patterns on polished metal surfaces - using interference strips produced by overlapping laterally displaced laser beam with original beam |
| US5817243A (en) * | 1996-10-30 | 1998-10-06 | Shaffer; Wayne K. | Method for applying decorative contrast designs to automotive and motorcycle parts using lasers |
| DE19741998A1 (en) * | 1997-09-24 | 1999-03-25 | Baublys Gmbh | Method of manufacturing and/or processing an embossing tool for coins or medals |
| DE19938446A1 (en) * | 1999-08-13 | 2001-02-15 | Bayerische Motoren Werke Ag | Engraving method involves applying selected gas atmosphere to metal surface area on which laser beam is incident for duration of engraving process to cause coloration of surface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2724869A1 (en) * | 2011-06-23 | 2014-04-30 | Toyo Seikan Group Holdings, Ltd. | Structure, structure-forming method, and structure-forming device |
| EP2724869A4 (en) * | 2011-06-23 | 2014-12-03 | Toyo Seikan Group Holdings Ltd | Structure, structure-forming method, and structure-forming device |
Also Published As
| Publication number | Publication date |
|---|---|
| ITMO20020167A1 (en) | 2003-12-15 |
| ITMO20020167A0 (en) | 2002-06-14 |
| AU2003276929A1 (en) | 2003-12-31 |
| AU2003276929A8 (en) | 2003-12-31 |
| EP1519841A2 (en) | 2005-04-06 |
| WO2003106099A3 (en) | 2004-02-19 |
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