WO2014185882A1

WO2014185882A1 - Protective element

Info

Publication number: WO2014185882A1
Application number: PCT/UA2013/000067
Authority: WO
Inventors: Георгий Владимирович БЕЙЛИН; Юрий Григорьевич СИДОРЕНКО; Андрей Николаевич ТИМОШЕНКО; Игнат Иосифович ПОГАНЬ
Original assignee: Общество С Ограниченной Ответственностью "Специализированное Предприятие "Голография"
Priority date: 2013-05-16
Filing date: 2013-07-02
Publication date: 2014-11-20
Also published as: UA84687U

Abstract

The invention relates to the design of a protective element which can be used for protecting products and various documents, in particular such as identification cards, and also banknotes, checks, excise stamps, bills and the like, from forgery. The protective element comprises a base which is manufactured from a transparent plastics material, and an information film layer with text and/or graphical information, and, according to the invention, at least one section of the information film layer has applied birefringence and is in the form of text and/or graphical information which can be viewed with the aid of an optical polarized decoder. The invention solves the problem of producing a protective element which is better protected from forgery or unauthorized reproduction on account of the formation therein, as a feature making forgery of said protective element more complicated, of sections which have applied birefringence in the form of text and/or graphical information which can be viewed only with the aid of an optical polarised decoder.

Description

Security element.

The present invention relates to the construction of a security element that can be used to protect against counterfeiting of products and various documents, in particular, such as identification cards, as well as banknotes, checks, excise stamps, tickets and the like.

Closest to the proposed one in terms of technical nature and the number of essential features is a protective element that contains a base made of a transparent plastic material and an information layer of a film with text and / or graphic information [Utility Model Patent

16913, Ukraine, MP (2006.01) B42D 15/10; G06K 19/00; Published August 15, 2006, bull. N ° 8]. The specified security element as a sign that complicates its fake, contains a hologram with text and / or graphic information.

The availability and widespread use of classical holographic technologies in the manufacture of this protective element significantly reduces its protective capabilities.

Therefore, the basis of the invention is the task of creating such a protective element that would be more secure from fakes or unauthorized reproduction by forming in it as a sign that complicates its fake areas that have induced birefringence in the form of text and / or graphic information with the ability to visualize it only using an optical polarization decoder.

The problem is solved in the proposed protective element, which, as well as known, contains a base made of a transparent plastic material and an information layer of a film with text and / or graphic information, and, according to the invention, at least one the section of the film information layer has induced birefringence and is made in the form of text and / or graphic information with the possibility of visualization using an optical polarization decoder.

A feature of the proposed protective element is that the text and / or graphic information is made with luminescent paint with the possibility of emitting light visible to the naked eye when it is irradiated with ultraviolet light. Luminescent paint facilitates the process of visualization of textual and / or graphic information, which is especially important when examining a large number of documents marked with the proposed security element.

A feature of the proposed protective element is the fact that the plot of the information layer of the film with induced birefringence has a metallized layer. The presence of a metallized layer is an additional protective feature, for the application of which quite innovative technologies are necessary, which complicate the possibility of falsification of the proposed protective element.

A feature of the proposed protective element is that the portion of the information layer of the film with induced birefringence contains a dielectric reflective layer. The presence of a dielectric reflective layer in a certain area is both an additional protective feature and an aesthetic feature, for the application of which it is necessary to use non-traditional technological means that complicate the possibility of falsification of the proposed protective element.

A feature of the proposed protective element is that in the area with a metallized layer there is a holographic microrelief in the form of protrusions and grooves. The combination of a metallized layer and a hologram is both an additional protective and, at the same time, additional aesthetic features, for the application of which are needed W

3 such technological means that complicate the possibility of falsification of the proposed protective element.

A feature of the proposed protective element is that the area with a dielectric reflecting layer contains a holographic microrelief in the form of protrusions and grooves. The combination of a specific section of the dielectric reflecting layer and the hologram are both additional protective and aesthetic features, for the application of which it is necessary to use such technological means that complicate the possibility of falsification of the proposed protective element.

A feature of the proposed protective element is that in the area of the information layer of the birefringent film there are metallized and demetallized sections. The combination of metallized and demetallized areas is an additional protective feature, for the application of which it is necessary to use non-traditional technological means, in particular, the use of substances for metal etching and special devices, which complicates the possibility of falsification of the proposed protective element.

A feature of the proposed protective element is that the metallized and demetallized areas contain a holographic microrelief in the form of protrusions and grooves. The combination of metallized and demetallized areas with a hologram is both an additional protective and aesthetic features, for the application of which it is necessary to use such technological means that significantly complicate the possibility of falsification of the proposed protective element.

The proposed security element is more protected from fakes and unauthorized reproduction due to the use of transparent layers in it, in certain areas of which there is induced birefringence in the form of hidden text and / or graphic information that is not visible to the naked eye, but which can only be visualized with using an optical polarization decoder. During the conduct of patent information research in the preparation of this application, the authors did not find the design of protective elements with the above set of essential features, which proves the conformity of the claimed technical solution to the criteria of the invention of "novelty".

The technical result obtained as a result of the implementation of the present invention consists in creating conditions for guidance in a certain area of the protective element of birefringence in the form of hidden text and / or graphic information that is not visible to the naked eye, but which can only be visualized using an optical polarization decoder. This technical result allows to complicate the fake security element and / or its unauthorized reproduction. In the studied technical solutions, which are included in the prior art, the authors did not reveal the effect of the transformations prescribed by the present invention, characterized by significant features distinctive from the prototype, on the achievement of the specified technical result. This proves the conformity of the proposed technical solution to the criteria of the invention "inventive step".

The proposed protective element contains a combination of essential features - structural elements of the device, each of which is known today. Given the above, as well as the fact that the proposed security element can be used in many sectors of the national economy, in particular, to protect against forgery of bank and credit cards, securities, forms for contracts or powers of attorney, identity cards, passes, tickets, you can do the conclusion that Th about the proposed solution meets the criteria of the invention of "industrial applicability".

The essence of the proposed protective element is explained using graphic materials.

In FIG. 1 schematically shows the proposed security element. W

5

In FIG. 2, 3 schematically shows the manufacturing process of the security element.

In FIG. 4 are symbols used to explain the manufacturing steps of the proposed security element, which are used in the following schematic drawings - FIG. 5 and 6.

Figure 5 shows the steps for obtaining a bright portion of a security element.

Figure 6 shows the steps for obtaining a dark portion of the security element. In the drawings, the proposed security element is indicated by 1, the optical polarization decoder is indicated by 2. The drawings also bear the image - the inscription "OK" 3, which becomes visible after application of the decoder 2. The security element 1 contains an information layer 4 and a polymer base 5 in the form of a film with section 6, which has induced birefringence in the form of text and / or graphic information and section 7 without induced birefringence. In this case, the layer 4 is placed on the base 5, which reflects the light. The protective element 1 may contain several information layers 4 with sections 6 and 7, which overlap or partially overlap, or do not overlap each other when viewed from above. Optical polarization decoder 2 consists of a film polarizer 8 and a quarter-wave film 9.

To explain the operation of the protective element 1 and the optical polarization decoder 2, the positions in FIG. 5 and 6 are given such numbers:

- 5 - a polymer base, the surface of which reflects light;

- 6 - section of layer 4 with induced birefringence;

- 7 - section of layer 4 without induced birefringence on it;

- 10 - unpolarized light,

- 1 1 - linearly polarized light;

- 12 - circularly polarized light, by oscillations of the electromagnetic vector in the counterclockwise direction;

- 13 - linearly polarized light; - 14 - linearly polarized light reflected from the surface of the base 5;

- 15 - circularly polarized light by oscillations of the electromagnetic vector in a clockwise direction;

- 16 - linearly polarized light;

- 17 - the maximum flux of linearly polarized light at the output of the decoder, which has the form of a bright area;

- 18 - circularly polarized light, by oscillations of the electromagnetic vector in the counterclockwise direction;

- 19 - the light flux obtained after reflection from the polymer base 5 of the light flux 18;

- 20 - circularly polarized light by the oscillations of the electromagnetic vector in the counterclockwise direction, which again passed through section 7;

- 21 - linearly polarized light with a plane of polarization orthogonal to the plane of the polarizer;

- 22 - the minimum light flux at the output of decoder 2, which is visually perceived as a dark area.

The proposed protective element is made as follows.

First, an information layer 4 is applied to the polymer base 5. Then, using a thermal transfer printer, birefringence is locally induced on it in the form of hidden text and / or graphic information. So, section 7 of information layer 4 without birefringence induced on it is perceived as a dark section when optical polarization decoder 2 is applied to the protective element 1, and at the same time, section 6 with birefringence induced on it is perceived as a bright section.

The process of forming bright areas 6 on the information layer 4 (figure 5):

Non-polarized light 10 is directed to the optical polarization decoder 2, which the polarizer 8 converts to polarized light 1 1. The polarized light 11 is incident on a quarter-wavelength film 9. The angle between the plane of polarization of light 1 1 and the optical axis of the quarter-wave film 9 is -45 °. Due to the effect of birefringence, the phase rises between the ordinary and the unusual rays on l 2, therefore, at the output of the decoder 2, circularly polarized light 12 is received with the electromagnetic vector oscillating in the counterclockwise direction. Circularly polarized light 12 falls on the surface of the protective element 1. In this case, the penetration of light 12 onto a portion 6 of layer 4 with birefringence induced in it leads to phase incidence between ordinary and unusual beams on w / 2 and to the formation of linearly polarized light 13, in which the angle between the plane of polarization of light 13 and the optical axis of section 6 is 45 °. After reflection from the surface of the polymer base 5, the light 14 re-passes through section 6 and again the phase incursion on w / 2 leads to the formation of circularly polarized light 15, but with clockwise oscillations of the electromagnetic vector. The light 15 falls on the quarter-wave film 9 and again the phase runs between the ordinary and unusual beams on w / 2, which leads to the formation of linearly polarized light 16 with the plane of polarization, which coincides with the plane of polarizer 8.

Thus, at the output of the decoder 2 receive the maximum flux of light 17, which is visually perceived as a bright area.

The process of forming dark sections 7 on the information layer 4 (Fig.6):

Non-polarized light 10 is directed to the polarization decoder, and polarizer 8 converts it into polarized light 1 1, which incident on the quarter-wave film 9. The angle between the plane of polarization of light 1 1 and the optical axis of the quarter-wave film 9 is −45 °. Due to the birefringence effect, the phase rises between the ordinary and the unusual rays at π / 2, therefore, circularly polarized light 12 with oscillations of the electromagnetic vector in the counterclockwise direction is obtained at the output of the decoder. Light 12 hits the surface of the protective element 1. In this case, circularly polarized light 12 is incident on a portion 7 of layer 4 without birefringence induced on it, therefore, the obtained luminous flux 18 remains circularly polarized with oscillations of the electromagnetic vector in a counterclockwise direction. After reflection from the polymer base 5 of the light flux 18, a light flux 19 is formed. The light flux 19 re-passes through section 7 without changes. The luminous flux 20 falls on the quarter-wave film 9, where again the phase incurs between ordinary and unusual beams on lg / 2, which leads to the formation of linearly polarized light 21 with a plane of polarization orthogonal to the plane of polarizer 8. Thus, the minimum a stream of light 22, which is visually perceived as a dark area.

Combining the dark 7 and light 6 sections, form text and / or graphic information that can be visualized using optical polarization decoder 2.

To create a metallized layer on layer 4, the process described in the patent of Ukraine for utility model N ° 47417 [IPC (2009) B42D 15/00; Publ. 01/25/2010, Bull. jYe 2].

To create on the layer 4 sections with text and / or graphic information made with a fluorescent paint with the possibility of emitting light visible to the naked eye when it is irradiated with ultraviolet light, the process described in the Ukrainian patent for utility model Ne 47417 [IPC (2009) B42D] can be used 15/00; Publ. 01/25/2010, Bull. Λ2 2].

To create on the layer 4 sections with a dielectric reflective layer, a process can be used that includes vacuum deposition of zinc sulfide with a thickness of 0.10-0.15 micrometers.

To create a metallized layer with a hologram on layer 4, the process described in the patent of Ukraine for utility model JY ^O 10055 [IPC (2006) G06K 19/00; G03H 1/04 (2006.01); publ. 10/17/2005, bull. JY ^O 10]. To create metallized and demetallized youth (plots) on layer 4, the process described in the Ukrainian patent for utility model J4 ^“ 47417 [IPC (2009) B42D 15/00; Publ. 01/25/2010, Bull. JTs 2].

To create a layer 4 metallized and demetallized youth

(sections) with a hologram, the process described in the patent for utility model JTs 47417 [IPC (2009) B42D 15/00; Publ. 01/25/2010, Bull. Λ2 2].

Hidden on layer 4 of the proposed security element 1, text and / or graphic information that is not visible to the naked eye can be visualized using only optical polarization decoder 2, therefore, the proposed security element 1 is more protected from fakes and against unauthorized use than the device prototype.

Claims

Claim.

1. A security element comprising a base made of a transparent plastic material and an information layer of a film with text and / or graphic information, characterized in that at least one portion of the information layer of the film has induced birefringence and is made in the form of text and / or graphic information with the ability to visualize it using an optical polarization decoder.

2. The protective element according to claim 1, characterized in that the text and / or graphic information is made with luminescent paint with the possibility of emitting light visible to the naked eye when it is irradiated with ultraviolet light.

3. The protective element according to claim 1, characterized in that in the area of the information layer of the film with induced birefringence there is a metallized layer.

4. The protective element according to claim 1, characterized in that the portion of the information layer of the film with induced birefringence contains a dielectric reflective layer.

5. The protective element according to claim 1, characterized in that in the area with a metallized layer there is a holographic microrelief in the form of protrusions and grooves.

6. The protective element according to claim 1, characterized in that the area with a dielectric reflecting layer contains a holofafic microrelief in the form of protrusions and grooves.

7. The protective element according to claim 1, characterized in that in the area of the information layer of the birefringent film there are metallized and demetallized sections.

8. The protective element according to claim 1, characterized in that the metallized and demetallized areas contain a holofafic microrelief in the form of protrusions and grooves.