WO2006073325A1 - Procede pour visualiser une image optiquement invisible d'un marquage et dispositif correspondant - Google Patents

Procede pour visualiser une image optiquement invisible d'un marquage et dispositif correspondant Download PDF

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Publication number
WO2006073325A1
WO2006073325A1 PCT/RU2004/000537 RU2004000537W WO2006073325A1 WO 2006073325 A1 WO2006073325 A1 WO 2006073325A1 RU 2004000537 W RU2004000537 W RU 2004000537W WO 2006073325 A1 WO2006073325 A1 WO 2006073325A1
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WIPO (PCT)
Prior art keywords
cooling
image
temperature
optically invisible
peltier
Prior art date
Application number
PCT/RU2004/000537
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English (en)
Russian (ru)
Inventor
Yuri Konstantinovich Nizienko
Original Assignee
Yuri Konstantinovich Nizienko
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 Yuri Konstantinovich Nizienko filed Critical Yuri Konstantinovich Nizienko
Priority to PCT/RU2004/000537 priority Critical patent/WO2006073325A1/fr
Publication of WO2006073325A1 publication Critical patent/WO2006073325A1/fr

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Classifications

    • 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
    • B44F1/10—Changing, amusing, or secret pictures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/42—Low-temperature sample treatment, e.g. cryofixation

Definitions

  • the invention relates to methods and devices for reading information hidden from visual perception and can be mainly used for visualization of identifying hidden images of tags that provide protection against unauthorized reproduction (fake), as well as for research purposes to provide visualization of optically invisible structures in the surface layer of the object by variations in the magnitude of surface energy.
  • a method is known from the prior art for visualizing a mark invisible to the naked eye formed in the near-surface region of a protected object (in particular, jewelry in the form of a diamond) by means of a laser beam in the form of an image (a protective mark) hidden for the naked eye.
  • the visualization of this image is carried out through the use of devices in the form of appropriate optical means and / or systems (US, N ° 4467172).
  • the disadvantages of the prior art method for visualizing a latent image include its limited use. For example, when marking jewelry (in particular, diamonds), the geometric parameters of the microstructures of the security label to be visualized using optical means are of such magnitude that they are regarded as a defect in the product, which sharply reduces its aesthetic properties and cost.
  • the disadvantages of the prior art device for visualizing a latent image include its limited use due to the need to use special optical systems.
  • the known method does not allow you to keep the label optically invisible after its first visualization (i.e., playback using the etching process).
  • a known method of visualizing an optically invisible image of a label according to which (formed on the surface of a test object by modifying at least one part of this surface with a change in the surface energy of the modified part), an optically invisible image of a mark is visualized by creating an investigated object in the region of said surface metastable medium from water vapor environment due to cooling of the object.
  • the visually perceived image of the label is obtained in the form of a difference in structures formed by particles of the stable phase of the metastable medium on the surface areas of the object under study with different surface energies (international publication No. WO.02 / 089041 of PCT / RUO application 1/00177).
  • a device for visualizing an optically invisible image of a tag, including cooling means (in the form of a camera of a refrigeration unit) of the object under study, on the mirror surface of which an optically invisible image of a tag is formed by modifying at least one part of this surface with changing surface energy of the modified part with the possibility visualization of an optically invisible image of the label by creating a metasta in the area of the mentioned surface sludge medium from the water vapor of the environment during cooling of the test object and obtaining, at the same time, a visually perceptible image of an optically invisible mark in the form of a difference in structures formed by particles of a stable phase of a metastable medium on the surface sections of the test object with different surface energies, while the cooling means is made with a mounting location (chamber cavity of the refrigerator) for placement of the test object (international publication N ° WO.02 / 089041 of application PCT / RU01 / 00177).
  • the claimed invention was based on the task of creating such a method for visualizing an optically invisible image of a tag, as well as a device for its implementation, which allow for expanding the functionality while increasing the contrast and spatial resolution of the reproduced image using a relatively simple device (Peltier element), which provides unlimited long-term preservation in time of a contrasting, visually perceptible image of a tag, pu thereby ensuring the stabilization of the optimal parameters of the temperature regime of cooling (thermal stabilization) of the corresponding surface of the investigated object to the required value of the temperature of the cooled surface during visualization.
  • a relatively simple device Peltier element
  • the problem (in relation to the subject of the invention "method") is solved by the fact that in the method of visualizing an optically invisible image of the mark, according to which, formed on the surface of the object under study by modifying at least one part of this surface with a change in the surface energy of the modified part, An optically invisible image of the mark is visualized by creating a metastable medium from the water vapor in the surrounding air hydrochloric medium by cooling the object, the visually perceived marking image is produced in the form of distinguished structures formed by stable phase particles of the metastable environment on the surface of the object portions with different surface energy according to the invention, the surface of the cooling the object is carried out by means of the Peltier effect, for which the studied object is placed in the area of the cooled contact of the cooling means in the form of a Peltier element with the possibility of providing controlled heat transfer, while the cooling of the studied object is carried out until the temperature reaches the temperature of the dew point of water vapor in the surface surrounding this surface air medium by means of a controlled change in the temperature of the cooled contact of
  • • visualization of an optically invisible image of the label including means for cooling the test object, on the mirror surface of which an optically invisible image of the label is formed by modifying at least one part of this surface with a change in the surface energy of the modified area with the possibility of visualizing the optically invisible image of the label by creating in the zone said surface of the studied object of a metastable medium from water vapor of the surrounding air in the process of cooling the test object and obtaining, at the same time, a visually perceptible image of an optically invisible mark in the form of differences in structures formed by particles of a stable phase of a metastable medium on the surface sections of the test object with different surface energies, while the cooling means is made with an installation location for placing the test object, according to the invention, the cooling means of the studied object is made in the form of a Peltier element implementing the Peltier conjugated to the strokes of which are connected to an electric circuit regulated by current strength, the installation place of the cooling means is located on the outer, visually accessible, surface of the cooled contact of the Peltier element
  • the installation location of the cooling means of the test object is placed in a closed volume, for example, in the form of an optically opaque casing, with the possibility of preventing the appearance of convective gas flows of the ambient air relative to the cooled surface of the test object, while it is equipped with optical means of visual observation of the visualized image of the label, which includes m: an optical system with an eyepiece disposed to display the mark in the reflection from the cooled surface of the object rays of blue and / or white-blue frequency spectrum, as well as standalone a directional light source, for example, in the form of an LED, generating this frequency spectrum.
  • Fig. 1 is a general diagram of a device for implementing a method for visualizing an optically invisible image of a tag.
  • Figure 2 the investigated object with an optically invisible image of the label before its visualization.
  • Fig.Z the investigated object after the visualization of the optically invisible image of the label (in the form of snowflakes).
  • the principle of visualizing an optically invisible image of a label by the claimed technical solution is based on a similar principle with respect to the principle of visualizing tracks (tracks) of charged particles when they are examined by a Wilson camera: that is, by condensation of a supersaturated vapor at “breathing centers” of phase stabilization states, which are ions formed along the trajectory of a charged particle;
  • An optically invisible (hidden) image of the mark is formed on the surface 1 of the investigated object 2 (which is preliminarily predominantly brought to mirror, for example, polishing) by modifying at least one part of this surface 1. Modification is carried out with a change in the surface energy of the modified areas. Modified areas can be created, for example, by exposing the corresponding surface 1 of the test object 2 to a spatially modulated ion beam (for example, by passing an ion beam through a mask) or by laser ablation.
  • the visualization of the optically invisible (hidden) image of the mark is provided by creating in the zone of the mentioned (that is, bearing the optically invisible image of the mark) surface 1 of the test object 2 of the metastable medium, by which a visually perceptible image of the optically invisible mark is obtained as a difference in structures (formed by particles of a stable phase metastable medium) on parts of the surface 1 of the investigated object 2 with different surface energies (that is, in areas that are functionally xa "catching centers)) stabilization of the phase state of the aforementioned metastable medium).
  • surface energy determines the work of formation of the “growth centers”) of the new phase and the activation energy of the phase transformation process.
  • the existence of surface energy and surface tension is the cause of the occurrence of metastable states (i.e., states of hypothermia, supersaturation).
  • the surface energy slightly (weakly) depends on temperature.
  • supercooled steam obtained from the water vapor of the environment (air) is used by contacting it with the cooled surface 1 of the test object 2.
  • the image of structures formed by particles of a stable phase metastable medium
  • the surface 1 of the investigated object 2 it is advisable to bring to a mirror to increase the contrast of the visualized image of the label.
  • a visualization mode can be used in which the condition of "stability" of the environment is fulfilled exclusively for the modified sections of the surface 1 of the studied object 2.
  • the stable phase of the metastable medium is formed only on the modified sections of the surface 1 of the studied object
  • the image visualization mode of the optically invisible mark shifts from a dynamic process to a more static one, for which it is necessary to provide thermal stabilization of the aforementioned process.
  • thermal stabilization in time of the corresponding surface 1 of the investigated object 2 during the visualization process and is the basis of the claimed invention.
  • This is achieved by cooling the surface 1 of the test object 2 by the Peltier effect, for which the test object 2 is placed in the zone of the cooled contact 3 cooling means in the form of a Peltier element 4 with the possibility of providing controlled heat transfer.
  • the cooling of said surface 1 is carried out to a temperature not exceeding the temperature of the dew point of water vapor in the air surrounding this surface 1 by means of a controlled change in the temperature of the cooled contact 3 of the Peltier element 4.
  • Temperature adjustment is necessary in order to adjust the temperature of the studied surface 1 of object 2 to the dew point temperature for the air surrounding the object 2, since for each specific humidity of the gas (for example, air) environment (i.e., the surrounding environment 2) There is a dew point strictly defined by temperature.
  • the minimum temperature setpoint of the corresponding surface 1 of object 2 for a temperature below the dew point temperature ensures the formation of condensate on the studied surface 1 of object 2 in the form of very finely divided drops (since the condensate is formed practically from the molecular state of water in the vapor state in the air) , which increases the spatial resolution of the developed image formed on the surface 1 of the object 2 labels.
  • the visualization process occurs almost statically, without any dynamic elements with a constant increase (over time) of the contrast of the visualized image of the label. With the correct selection of the temperature regime on the surface 1 of object 2 visually The perceived mark image can be held indefinitely.
  • optical system 7 is used if the geometrical parameters of the mark formed on the surface 1 of the investigated object 2 cannot be distinguishable to the eye.
  • an optical system 7 is used with a seven-, ten-fold increase, but its multiplicity is limited only by the geometric dimensions of the image.
  • the implementation of the process of cooling the surface 1 of the investigated object 2 in a closed volume allows us to completely eliminate the influence of convective flows of the ambient air on the process of condensation of water vapor in the region of the studied surface 1, which increases the image quality and its stabilization during time.
  • the mark is considered reflected from it (i.e., from the investigated surface 1) rays of light that increases contrast due to the absence of glare, since, in this case, there is no access for stray light fluxes to the surface area 1.
  • Using the backlight of the blue and / or white-blue frequency spectrum is advisable because the light of this frequency spectrum is scattered more strongly than others on the inhomogeneities of the mirror surface 1.
  • the essence of the claimed method is based on the strong dependence of the dynamics of formation on the surface 1 of object 2 of a stable phase from a metastable medium on the value of free surface energy.
  • the formation of a stable phase from a metastable medium occurs differently.
  • different dynamics of the formation of a stable phase leads to visualization of the structure of surface sections I 5 constituting an optically invisible image of the mark.
  • a device for visualizing an optically invisible image of a tag includes means for cooling the mirror surface 1 of the test object 2 with a mounting location for its placement.
  • the cooling means of the studied object 2 is made in the form of a Peltier element 4 implementing the Peltier element (usually with a power not exceeding 30 W), the conjugated contacts of which are connected to a direct current electric circuit 9.
  • the mounting location of the cooling means is located on the outer (visually accessible) surface of the cooled contact 3 of the Peltier element 4 with the possibility of placing the test object 2 in the space region with an inhomogeneous temperature field and with the possibility of cooling the mirror surface 1 of this object 2 to a temperature not exceeding the temperature of the dew point of water vapor in the air surrounding this surface 1, by means of a controlled change in the temperature of the cooled contact 3 of the Peltier element 4.
  • An adjustable change in temperature of the cooled contact 3 is carried out by changing the current strength in the aforementioned electrical circuit 9.
  • the mounting location of the cooling means of the test object 2 can be placed in a closed volume (for example, in the form of an optically opaque casing b) with the possibility of preventing the appearance of convective air flows from the environment relative to the cooled surface 1 of the test object 2.
  • tags which include: an optical system 7 with an eyepiece, placed with the ability to display tags in the reflected (from the cooled surface 1 of the object 2) rays of the blue and / or blue-white frequency spectrum, as well as an autonomous source 8 of the directed light flux (for example, in the form light diode) generating this frequency spectrum.
  • Peltier element 4 The principle of operation of Peltier element 4, as is known, is based on the release or absorption of heat at the junction point (junction 10) of two contacts 3 and 5 from dissimilar materials (metals and / or semiconductors) when direct current passes through contacts 3 and 5. In a closed circuit 9, one contact 5 is heated, the other contact 3 is cooled. The amount of heat generated or absorbed at contacts 3 and 5, respectively, is proportional to the magnitude of the current strength in the electric circuit 9 closed through contacts 3 and 5 of the Peltier element 4.
  • the physical principle of operation of the device for visualizing an optically invisible label is described above (as part of the description of the visualization method) and does not require additional explanations. An example of a specific implementation of the patented invention.
  • a latent (optically invisible) image of a mark in the form of a snowflake with a diameter of 6 mm was formed on K-8 glass polished to the 13th grade of cleanliness of the surface of the substrate 1 (test object 2) by modifying portions of the surface of the substrate 1 using an ion beam transmitted through mask stencil.
  • the substrate was placed in the device shown in Fig. 1 (as shown in graphic materials) and its polished surface 1 was cooled to the dew temperature of water vapor in the environment surrounding this surface 1 (air), followed by stabilization of this temperature in time by adjusting the current strength in the electric circuit 9 of the Peltier element 4.
  • the claimed inventions can find wide application in various fields of science and technology for the implementation of reading information hidden from the visual perception, formed on the surface of the studied object by a certain method.
  • they can be used for multiple visualization of latent images (marks) identifying an object, which provide its protection against unauthorized reproduction (falsification), as well as for research purposes to provide visualization of optically invisible structures differing only in the magnitude of surface energy.

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  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

L'invention peut s'utiliser pour visualiser des images (marquages) cachés servant à identifier un objet, qui garantissent la protection de l'objet contre sa reproduction non autorisée (la contrefaçon). Une image optiquement invisible du marquage (formée à la surface (S) (1) de l'objet examiné (OE) (2) par la modification d'une partie de (P) (1), avec modification de l'énergie de surface) est visualisée au moyen de la création dans la zone (S) (1) (OE) d'un milieu métastable en vapeur d'eau de l'environnement, grâce au refroidissement de cette (S) (1). L'image perceptible visuellement du marquage est obtenue sous la forme de différences de structures qui est formée par les particules de la phase stable du milieu métastable dans les zones (S) (1) avec une énergie de surface différente. Le refroidissement de (S) (1) (OE) est effectué grâce à l'effet de Peltier. A cette fin, (OE) (2) est disposé dans la zone de contact refroidi (3) du moyen de refroidissement sous la forme d'un élément de Peltier (4), avec possibilité d'assurer un échange de chaleur ouvert. Le refroidissement de ladite (S) (1) est effectué jusqu'à une température qui ne dépasse pas le point de rosée de la vapeur d'eau dans l'environnement entourant cette (P) (1). A cette fin, on effectue le changement régulé de température du contact refroidi (3) de l'élément de Peltier. Pour modifier la température de la manière décrite plus haut, on utilise un moyen de refroidissement dont le principe de fonctionnement est basé sur l'effet de Peltier, et dont la construction est analogue à celle d'un élément (4) de Peltier qui fait partie d'un circuit électrique à courant réglable (9).
PCT/RU2004/000537 2004-12-30 2004-12-30 Procede pour visualiser une image optiquement invisible d'un marquage et dispositif correspondant WO2006073325A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/RU2004/000537 WO2006073325A1 (fr) 2004-12-30 2004-12-30 Procede pour visualiser une image optiquement invisible d'un marquage et dispositif correspondant

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Application Number Priority Date Filing Date Title
PCT/RU2004/000537 WO2006073325A1 (fr) 2004-12-30 2004-12-30 Procede pour visualiser une image optiquement invisible d'un marquage et dispositif correspondant

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6187213B1 (en) * 1995-07-17 2001-02-13 Gersan Establishment Marking diamond
RU2169032C1 (ru) * 1999-11-09 2001-06-20 Цивинский Станислав Викторович Устройство для эффективного получения пресной воды путем конденсации водяных паров из воздуха
RU2169667C2 (ru) * 1999-05-11 2001-06-27 Санкт-Петербургский государственный технологический институт Способ получения скрытого обратимого изображения
US6392227B1 (en) * 1999-07-29 2002-05-21 Star Envirotech, Inc. Liquid for producing marker vapor, a method of producing marker vapor and a method of inspection with marker vapor
WO2002089041A1 (fr) * 2001-04-26 2002-11-07 Alexandr Mikhailovich Dykhne Procede de formation et de visualisation d'une marque optiquement invisible

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6187213B1 (en) * 1995-07-17 2001-02-13 Gersan Establishment Marking diamond
RU2169667C2 (ru) * 1999-05-11 2001-06-27 Санкт-Петербургский государственный технологический институт Способ получения скрытого обратимого изображения
US6392227B1 (en) * 1999-07-29 2002-05-21 Star Envirotech, Inc. Liquid for producing marker vapor, a method of producing marker vapor and a method of inspection with marker vapor
RU2169032C1 (ru) * 1999-11-09 2001-06-20 Цивинский Станислав Викторович Устройство для эффективного получения пресной воды путем конденсации водяных паров из воздуха
WO2002089041A1 (fr) * 2001-04-26 2002-11-07 Alexandr Mikhailovich Dykhne Procede de formation et de visualisation d'une marque optiquement invisible

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Novy politekhnichesky slovar", BOLSHAYA ROSSYSKAYA ENTSIKLOPEDYA, 2000, MOSCOW, pages 365+464 *

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