Label with diffraction barcode and reading device for such labels

FIELD: labels with diffraction barcodes and reading device for information recognition on such labels.

SUBSTANCE: label contains at least one machine-readable diffraction barcode, which consists of narrow rectangular fields and intermediate surfaces covered by optically active structures. Optically active structures covered by reflecting layer are sealed in layers of laminated structure. Relief structure of fields diffracts and polarizes in defined plane the incident light and disperses the diffracted light into half-space above the diffraction relief structure. Other microscopically small optically active structures differ from the diffraction relief structure by at least polarizing capabilities. Polarized back-scattered light can be registered by one of the known standard reading devices for barcodes made by printing technique.

EFFECT: creation of inexpensive machine-readable label with diffraction barcode, which can be read by standard reading devices at a distance of several decimeters.

20 cl, 9 dwg

 

The invention relates to a label with a diffraction bar code according to the restrictive part of paragraph 1 of the claims and the reader to recognize the information on such labels according to the restrictive part of paragraph 13 of the claims.

These labels are used for marking goods, certificates or securities and carry digital information goods identity or security. Barcode such labels are read by optical means and has good machine readability contained in the bar code information.

There are various types of barcodes, such as MIL-STD-1189 or "European Article Numbering Code", which information is contained in different location across the width of line elements and gaps. Using easy way to print bar elements are put in contrast with intervals of color in the media, usually paper. On sale are a reader that can read such bar codes.

According to US 5900954, protection of the barcode from a fake can be improved due to the fact that the bar code is printed on the medium with a hologram. The bar code is located entirely or partially on the hologram.

In EP 0366858 A1 describes the various run of the diffraction bar code, instead of having a printed bar elements surface ele the patients with diffraction gratings. Compared to manufactured equipment printing barcodes diffraction bar codes have high protection against tampering. However, the advantage of high-spoofing protection is achieved through small compared to manufactured equipment printing barcodes tolerance in relation to the orientation of the diffraction bar code reader beam reader and by limiting the distance between reader and label a few centimeters. In addition, manufactured by technique of printing separately barcode with individual information is extremely cheap, while the diffraction bar codes can rationally be made with reasonable cost only in large quantities and with the same information.

Located in a mosaic-like surface with embossed in the plastic, microscopically small diffraction structures are known, for example, from EP 0105099 B1 and EP 0375833 B1. Perform security labels to the structures of the diffractive optical action and used materials are listed in US 4856857.

From DE-OS 1957475 and SN 653782 known another family microscopically fine relief structures of the diffractive optical action called "kinoform". Only when the lighting cinema form, essentially coherent light last rejected by cinema form asymmetrically under the one ol the spatial angle, given the relief structure of the cinema form.

The basis of the invention lies in the task of creating a low-cost, optically machine readable by labels, at least one diffractive bar code that can be read standard reading devices from a distance of several decimeters.

The problem is solved according to the invention by the characteristics given in the characterizing part of paragraph 1 of the claims. The preferred implementation of the invention are given in the dependent clauses.

Examples of execution of the invention shown in the drawing and described in more detail below. In the drawing represent:

- figure 1: a label with the diffraction bar code;

- figure 2: cross section of the label;

- figure 3: enlarged fragment of figure 2;

- figure 4: the diagram;

- figure 5: diffraction bar code;

- 6: two parallel bar code;

- figa, 7b: alternating barcodes;

- Fig: first reader;

- figure 9: second reader.

Figure 1 is a POS. 1 marked label, POS. 2 - the region with the diffraction bar code 3, POS. 4 - field and POS. 5 the mid-surface of the bar code 3. Field 4 and the intermediate surfaces 5 are rectangular strips that are touching each other with their longitudinal sides, are located across the region 2. Every two is the following one behind the other fields 4 are separated by an intermediate surface 5, moreover, in the sequence of the fields 4 and the intermediate surfaces 5 different width encoded information. At least, fields 4 are embedded in the label 1 of the diffraction structure. The intermediate surface 5 is made, for example, in the form of reflecting or absorbing bands. In another implementation, the intermediate surface 5 also have diffraction patterns, the azimuth of which is different from the azimuth of the diffraction patterns in fields 4, at least ±20° modulo 180°. Preferably all of the fields 4 or all of the intermediate surface 5 filled with the same optically active structure. Label 1 is attached, for example, on the subject of 6 and contains the bar code 3 information about the subject 6. Item 6 may be a document, a paper, a sticker or a three-dimensional body, etc. In accordance with the purpose of remaining on the surface of the label 1 posted by logo 7, numbers or letters 8, used for visual recognition of the origin of the label 1. Information may be printed by the printing technique or made in the form known from the above-mentioned publications EP 0105099 B1 and EP 0375833 B1 diffractive surface pattern, a diffraction structure which is also embedded in the label 1. In another implementation, the label 1 is also provided space for additional bar code field 9, which is more the tion, manufactured by technique of printing bar code or additional diffraction bar code. Field 9 is oriented predominantly parallel to the field 2, so that the same reading device to read the machine through an additional bar code 9 from the field and diffraction bar code 3 of region 2.

Figure 2 label 1 shown in cross section. Label 1 is composed of multiple layers 10-14 composition 15, which is limited to one side covering layer 10, and on the other side of the adhesive layer 14. Under the surface layer 10 in the sequence are layer 11 for stamping, a reflective layer 12, the protective layer 13 and the adhesive layer 14. For at least one wavelength that is incident on the label 1 light 17, at least the covering layer 10 and layer 11 for stamping are transparent. In the layer 11 for stamping molded microscopically fine relief structure 16, which defraging, for example, visible incident light 17. The reflective layer 12 of thickness less than 100 nm in exactly the form closes microscopically fine relief structure 16. The protective layer 13 fills the depressions of the relief structures 16 and closes the structured reflective layer 12. The adhesive layer 14 provides a reliable connection between the object 6 and layered composition 15.

Various run-layered composition 15 th is the breaking for the manufacture of materials are given in tables 1-6 above-mentioned publication US 4856857. The applied technique of printing a label 18 is made of at least one of the layers 10-14 layered composition 15 light absorbing paint. When one run labels 1 customized made using the technique of printing on the top layer 10 in the form of labels 18 additional barcode field 9 (Fig 1) or numbered in the sequence of manufacture.

Figure 3 as an example in the context of the depicted rectangular profile flat diffraction grating across the grooves 19 of rectangular profile. The lattice vector k lies therefore in the plane of the drawing. Rectangular profile has a geometric depth D. As light 17 falls through the covering layer 10 and layer 11 for stamping formed on the reflective layer 12 a diffraction grating, grooves 19 are filled by the material of the layer 11 for stamping. Instead of the geometric depth D of the profile becomes effective optical depth d of the profile, which is D·n, and n indicates the refractive index of the material layer 11 for stamping. Rectangular profile shown only for simplicity instead described below diffractive relief structure 16 (diffraction structure).

If the diffraction structure has more than 2300 lines per millimeter, the falling vertically polarised light 17 dirrahiuma of the visible spectrum only in the zero order. For pausegame angle on the diffractive structure of the light 17 density lines should correspondingly increase, for example, to the value 2800-3000 lines per millimeter. As flat mirrors, the angle between the incident light 17 and the normal to the plane of the diffraction patterns is equal to the angle between diregiovani light and normal. Such diffraction patterns are called below the diffraction structure of the zero order. When illuminated with white fluorescent light as opposed to the flat mirror dragirovaniya diffraction structure of the zero-order light has gaps in the visible spectrum, so that the diffraction structure of the zero-order acts as a reflecting mirror in color.

Figure 4 shows the graph of the diffraction efficiency of E flat diffraction patterns for polarized light TE and TM depending on the optical depth d=D profile and the refractive index n=1. Polarized light THOSE dirrahiuma with high diffraction efficiency E almost regardless of the depth D of the profile. In contrast, the diffraction efficiency of the S polarized light of TM depends strongly on the depth D of the profile, and the diffraction efficiency of the S polarized light of TM with increasing depth D of the profile decreases rapidly up to the first minimum. If the direction of the unpolarized incident light 17 and the vector k of the lattice (figure 3) diffraction patterns lie in the same plane, then the vector napryajennost the electric field parallel to the polarized light oscillating parallel to this plane, while the electric field intensity vector orthogonal polarized light oscillates at right angles to it. Used for bar code 3 of diffractive structure has preferably a depth of TGprofile near the first minimum, since the polarization of the diffracted light most strongly. Dragirovaniya light, therefore, linearly polarized, i.e. diffractive relief structure 16 acts as a polarizer or polarization of the incident light 17 (figure 3) as the analyzer. The useful range of geometric depth D of the profile includes a value of TGbetween 50 and 350 nm. Suitable for layer 11 for stamping materials are in accordance with table 6 of the above-mentioned publication US 4856857 index n of refraction in the range of about 1.4 to 1.6.

If the diffraction structure is rotated in its plane by 90°and grooves 19 are oriented parallel to the plane of figure 3, and the lattice vector k is perpendicular to it, then the orthogonal polarized with respect to the plane of the incident light 17 (3) light is absorbed, and parallel polarized light dirrahiuma according to curve THE efficiency. Thanks polarizing ability of this diffraction patterns you can set the direction of the vector k of the lattice (figure 3).

Depicted in figure 5 label 1 cut and the layered composition 15 (figure 2). Sealed between layers 11 and 13 (figure 2) layered composition 15, is covered with a reflective layer 12 (figure 2) microscopically small, optically active structures, i.e. diffraction patterns, mirrors, etc. define a narrow rectangular field 4 and the gaps 5 is read by a machine diffraction bar code 3 in region 2. In the fields 4 layer 11 for stamping molded first diffractive relief structure 16 (Fig 3). The first diffractive relief structure 16 is the sum of the imposition of the first diffraction structure of the zero-order to first vector k1 of the lattice and on microscopically small light-scattering relief structure. Microscopically small light-scattering relief structure is a structure from the group of an isotropic or anisotropic scattering Matt structures, kinoform or Fourier holograms. Made so diffractive relief structure 16 has the advantage that in contrast to planar diffractive structure regardless of the incident angle on the diffractive relief structure 16 light 17 (3) dragirovaniya light is discarded in all the half-space above the diffractive relief structure 16. Light-scattering relief structure is preferably selected from the possibility of reverse dispersion of the diffracted light primarily to the military in the direction of the reading device. It is a prerequisite that the standard reader is manufactured by technique of printing bar codes can be used to read almost protected from a fake bar code 3. If microscopically small light-scattering relief structure represents kinoform, the light source reader must create a coherent light, because otherwise the desired scattering effect is not achieved.

In another implementation, the barcode 3 of the intermediate surface 5 is filled, at least one additional diffractive structure with additional vector k2 of the lattice, the azimuth of which is different from the azimuth of the first vector k1 of the lattice, at least ±20° modulo 180°. In another implementation, the intermediate surface 5 have mirror-like surface structure, such as a flat mirror surface or a diffraction structure of the zero order.

In another implementation, all of the intermediate surface 5 filled with a second diffractive relief structure 20 (Fig 3). A second diffractive relief structure 20 is an overlay of the second diffraction structure of the zero-order with the second vector k2 lattice on one of these microscopically small light-scattering relief structure. The vectors k1, k2 gratings bookmark is given azimuthal angle in the range of 45-135° both vectors k1, k2 gratings are oriented relative to each other, preferably perpendicular, as shown in figure 5.

In one preferred implementation of the first and second diffraction patterns of the zero order have, except for the directions of the vectors k1, k2 gratings, the same parameters. If the first 16 and second 20 bump patterns differ only in the direction of the vectors k1, k2 both gratings of the diffraction structures of the zero order, the bar code 3 cannot be detected without auxiliary means, because to an observer as field 4, and the intermediate surface 5 equally bright and represented in one color. Auxiliary means are light bar code 3 of polarised light or using a barcode 3 through the optical polarizing filter. When considering bar code 3 through the optical polarizing filter observer distinguishes, for example, field 4 in the form of bands of light, which is separated appearing in the form of dark bands intermediate surfaces 5. After the rotation of the polarization filter in its plane at 90° field 4 are dark stripes, and the intermediate surface 5 - light bands.

This embodiment of the bar code 3 has one additional advantage. Bar code 3 can still be read, if in area 2 over DEFRA the traditional bar code 3 is manufactured by technique of printing additional barcodes as labels 18 (figure 2). The labels 18 are separated by colorless intervals strokes 21 additional bar code and printed on the top layer 10 or under the surface layer 10 a layered composition 15 (2) light absorbing paint. Manufactured by technique of printing additional bar code can be detected by the standard reader. The strokes 21 and lying between them colorless intervals are oriented parallel fields 4 and the intermediate surfaces 5 of the diffraction bar code 3. Figure 5, for clarity, shows only one pair of strokes 21. Recognition narrow strips of the diffraction bar code 3 is a prerequisite for successful reading. The strokes 21 additional barcode can close a narrow strip of diffraction bar code 3 at most in the range of 50-70%, i.e. the surface of each of field 4 and each of the intermediate surfaces 5 are visible through colorless intervals of at least 30%. Using the optional bar code of each label 1 can be economically individualize, for example, by continuous numbering.

Figure 6 shows the area 2 with the first diffraction bar code 3 and parallel to the field 2 field 9 with the second diffraction bar code 24 formed from field surfaces 22 and intermediate fields 23. If one run labels 1 region 2 and the bar-code field 9 supremacy who by their longitudinal sides, field 2 and field 9 form field area 25 of the label 1. Both the diffraction bar code 3, 24 are located adjacent and parallel to each other in the field area 25. To machine-read both bar code 3, 24 can be recognized separately, field 4 of the first bar code 3 differ from field surfaces 22 of the second bar code 24, at least, its polarizing ability. Field 4 contains the above-described first diffractive relief structure 16 (Fig 3). Field surface 22 of the second bar code 24 is filled above the second diffractive relief structure 20 (Fig 3). The first k1 and the second k2 vectors arrays (figure 5) is oriented preferably perpendicular to each other. The intermediate surface 5 and the intermediate field 23 contains at least one additional diffractive relief structure with additional lattice vector k, the azimuth of which is different from the azimuth of the first k1 and k2 of the second vector lattices, at least ±20°or above the mirror surface patterns. Incident-light 17 (figure 3) with the same polarization viewed from a direction of a light source of field 4 is represented by light, and the intermediate surface 5 and the second diffraction bar code 24 - dark. Incident-light 17 on the other polarization field surface 22 of the light and intermediate fields 2 and the first diffraction bar code 3 dark.

The above-described diffraction bar codes 3, 24 have a height H in the range of 0.8-2 cm Width In narrow strips is at least 90 microns.

In another implementation, both the barcode 3, 24 are not parallel and next to each other, and according figa, 7b in region 2 so that both the barcode 3, 24 form an optically active structure of the first 27 and second 28 sections of the intermittent bar code 26, and every two neighboring belonging to the first bar code 3 of section 27 are separated one from belonging to the second bar code 24 sections 28. Sections 27, 28 of the intermittent bar code 26 occupy half the space between the bar code 3 or 24, respectively, formed of field 4 and the intermediate surfaces 5 and field surfaces 22 and intermediate fields 23. Interleaving can be very finely divided, and bands regardless of their width In (6) are arranged on an integer number of lots 27, 28, since these areas should have a minimum width of 15 μm.

On figa, for example, a narrow strip of the bar code 3 or 24 belong to section 27 or 28 respectively, and a broad band to the two sections 27 or 28. The same value of the first 27 and second 28 sections of their longitudinal sides are alternately in region 2 so that each time one of the first sections 27 should one of the second sections 28. In the acceptable bar codes 3, 24 sequence of optically active structures are located on the first 27 and second 28 sections. On figa arrows 29, 30 show how alternating the bar code 26 is composed of both the barcode 3, 24. For clarity, sections 27, 28 in accordance with belonging to the strips 4, 5, 22, 23 are shaded. The first sections of the 27 fields 4 with respect to the longitudinal extent of the region 2 is shaded along. The first sections 27 of the intermediate surfaces 5 are bent to the right shading. Belonging to field surfaces 22 of the second sections 28 are not shaded, while leaning to the left shading indicates the second sections 28 intermediate fields 23.

Narrow band width 90-120 microns separated by wide sections 27, 28 of a width of at least 25 microns to a maximum of eight. Standard reader illuminates the bar code optically scanning area 2 along the light beam of the light spot 31 with a diameter of about 0.1 mm Illuminated spot 31 passes through sections 28 or 27 belonging to one of the narrow lanes.

Describes the alternation of both the barcode 3, 24 is only one of many possibilities. Another execution of the intermittent bar code 26 has fig.7b the staggered equally large sections 27, 28 in the form of pixels on the long side 15-25 microns, and the first sections 27 of the first diffraction bar code take the place of black cells, and the second areas 28 of the second diffraction bar code 24 - where the white squares of a chessboard. Sections 27, 28 belong to the optically active structures in the sequence of the bands of both the barcode 3, 24.

Height H (figa) bands barcode 3, 24, 26 has a value in the range of 0.8-2 cm, This height H provides, within certain limits, read this barcode 3, 24, 26 inclined to the longitudinal boundaries of the target area 2, 9, 25 (6) direction. Region 2, 9, 25 replaces below also box 9 for a bar code and a field area 25.

On Fig schematically the reader with the reading device 32 for the barcode 3, 24, 26. The source 33 of the light produces a readout beam 34 of polarized or unpolarized light, floating reciprocating reading device 32 with a deflecting device (not shown) re-zone 35 reading. As soon as area 2, 9, 25 labels 1 piece 6 will enter the zone 35 is read, the light spot 31 (7) operatorisready light 36 is modulated in intensity in accordance with the bar code 3, 24, 26. Operatorisready light 36 falls into the reading device 32, at least one photodetector 37. Operatorisready light 36 is converted by the photodetector 37 is proportional to the intensity oratorskogo light 36, the electrical signals that are analyzed by cityviews the apparatus 32. If reading device 32 detects the modulated light as one of the known barcode corresponding to a barcode information 3, 24, 26 code is fed to further processing code of the device 38.

If the diffraction bar code contains only one described above, acting as a polarizer diffractive relief structure 16 (Fig 3), operatorisready light 36 diffraction bar code can be read above the reading unit 32, when the first optical polarizing filter 39 is located at least in front of the photodetector 37 and oriented so that polarized, operatorisready light 36 passes through the first polarizing filter 39 without weakening. When using polarized light for readout beam 34 light should be polarized so that the diffraction by the first relief structure 16 occurred with maximum efficiency. This is, for example, the case when the read beam 34 and operatorisready light 36 penetrate the same, located in front of the window 40 of the read device 32 polarizing filter 39, and the first diffractive relief structure 16 as the analyzer is oriented along the azimuth of the plane of polarization of the polarizing filter 39.

If the label 1 are surfaces with two is acting as a polarizing diffractive relief structures 16, 20 (3) and diffractive relief structure 16, 20 are different, at least polarizing ability, then the reader on Fig.9 able to separately read the information contained in the first 16 and second 20 diffractive relief structures (figure 3). In the case of non-polarized readout beam 34 enough of the second photodetector 43, which simultaneously receives light 36, operatorisready on the second acting as a polarizer diffractive relief structure 20, and before the second photodetector 43 is a second optical polarizing filter 41, oriented so that the second photodetector 43 penetrates only operatorisready on the second relief structure 20 light 36.

In one simple implementation of the reader includes two standard readout device 32, 42 that are oriented so that operatorisready light 36 falls in the first photodetector 37 in the first reading device 32 and the second photodetector 43 of the second reading unit 42. Radiated by a source 33 of the light of the first reading unit 32, unpolarized light readout beam 34 is diffused on both diffractive relief structures 16, 20 diffraction bar code 3 in the half-space above the bar code 3. Located before the first photodetector 37 first paragraph is larization filter 39 is permeable only for oratorskogo on the first diffractive relief structures 16 light 36, while the second photodetector 43 takes polarizing filter 41 exceptionally light 36, operatorisready from the second diffractive relief structures 20. The source 44 of the light in the second reading device 42 is not required.

The output 45 of the first photodetector 37 and the output 46 of the second photodetector 43 is connected to the analyzer 47 reader. The analyzer 47 generates code for the United analyzer 47, further processing of the device 38. When reading processed simultaneously generated by the photodetectors 37, 43 signals, and the corresponding code numbers are sent for further processing device 38.

The reader with two standard reading devices 32, 42 readable described above, the diffraction bar code 3, field 4 (figure 5) completed the first diffractive relief structure 16, and the intermediate surface 5 (5) - second diffractive relief structure 20. Both outputs 45, 46 therefore, in each moment generated by the photodetectors 37, 43 when reading this bar code 3 signals complementary to each other. This ensures preferably check with the safety precautions read the bar code 3.

The strokes 21 (figure 5) additional bar code, which, as described above, caused by the printing technique, for example, the covering layer 10 over di is ractional the bar code 3, educated first 16 and second 20 diffractive relief structures that absorb the incident in the illuminated spot 31 (7) light. Narrow strokes 21 have a width approximately corresponding to the diameter of the illuminated readout beam 34 spots 31 and broad strokes 21, at least twice the width of the narrow strokes 21. Narrow strips of the diffraction bar code 3 have a width In (6), at least three narrow strokes, in order to colorless intervals additional barcode is visible, at least 30% of the area of the fields 4 or intermediate surfaces 5. If the stain 31 closes the bar 21, it is not produced oratorskogo light 36, and both the outputs 45, 46 there is no signal of the photodetectors 37, 43. With both outputs 45, 46 are connected to the inputs of a logical block 48. Over the duration of the match States "no signal" on both outputs 45, 46 logical unit 48 changes its output signal and produces on line 49 between the logical block 48 and the analyzer 47 reads the signal generated by the strokes 21 additional barcode. The analyzer 47 generates code in accordance with information contained in a few additional barcode individual information label 1 (figure 1). The information is read in conjunction with additional barcode diffraction bar code 3 gives, for example, information about spotovi is barely labels 1. The advantage of this reader is that it simultaneously reads produced by the technique of printing additional bar code and the diffraction bar code 3 and made of standard reading devices 32, 42.

In order to machine the bar code reader 3, 24, 26 prevent interference due to the light diffracted by formed from a mosaic located diffraction grating structures emblems 7 (Fig), as well as figures and letters 8 (Fig), the azimuth vectors k of these diffraction lattice structures differ, at least ±20° azimuth vectors k1 or k1 and k2 used in the diffraction bar codes 3, 24, 26 of the diffraction structures. If, for example, the vectors k1 and k2 are the azimuths 0° and 90°, the azimuth vectors k should be chosen from a range 20-70° and 110-160° respectively modulo 180°.

Instead of visible light can also be used in the neighboring region of the spectrum visually visible light, in particular the near infrared region.

As can be seen from figure 4, the non-polarized incident light 17 (Fig.9) is not fully linearly polarized in the first or second diffractive relief structure 16 (Fig.9). Operatorisready light 36 (Fig.9) has for each diffractive relief structure 16 in addition to the intensive component, difragirovavshej according to curve THE efficiency, t is the train the weaker component, Draginovo under the curve TM efficiency. However, the intensity of one of the two polarized components obretenova light 36 prevails in such a way that, for example, one reader device 32 receives more intense component through the first polarizing filter 39 (Fig.9), while the weaker component reaches another reading device 42 through the second polarizing filter 41 (Fig.9). Reading devices 32, 42 respond only to a component obretenova light 36 with higher intensity.

1. Label (1) of the layered composition (15)containing the sealed between its layers (11; 13), covered with a reflective layer (12) are microscopically small, optically active structures that form in the tape region (2; 9; 25), at least one machine readable by a diffraction bar code (3; 24) and are in the form of narrow rectangular fields (4) and separating fields (4) intermediate surfaces (5), characterized in that at least the fields (4) barcode (3) contain diffractive relief structure (16), the parameters of the diffractive relief structure (16) is selected sufficiently so that the incident on the diffractive relief structure (16) light (17) dirrahiuma and back scatters in the half space above the diffractive relief structure (16), dragirovaniya and ratnasamy light (36) linearly polarized in a given plane, while the rest of microscopically small, optically active structures differs from the diffractive relief structure (16), at least polarizing ability.

2. The label according to claim 1, characterized in that formed from field surfaces (22) and intermediate fields (23) of the second diffraction bar code (24) is in region (2; 9; 25) parallel to the first diffraction bar code (3), fields (4) of the first bar code (3) contain the first diffractive relief structure (16)formed by overlapping the first diffraction structure of the zero order on microscopically small light-scattering relief structure, field surface (22) of the second bar code (24) contain the second diffractive relief structure (20), which represents the overlap of the second diffraction structure of the zero order on microscopically small light-scattering relief structure, and the first vector (k1) grating, the first diffraction structure of the zero-order and a second vector (k2) of the grating of the second diffraction structure of the zero-order sign of the azimuthal angle in the range of 45-135°while the intermediate surface (5) and intermediate field (23) contain at least one additional diffractive relief structure with an additional vector (k) of the lattice, the azimuth of which is different from the azimuth of the first(k1) and second (k2) vector lattices, or mirror surface structure.

3. The label according to claim 2, characterized in that the first (3) and second (24) bar codes interspersed between both fields (4) and the intermediate surface (5) of the first bar code (3) have a specified separation of the first sections (27), and the field surface (22) and the intermediate field (23) of the second bar code (24) have the same separation on the second sections (28), while in the area specified in both barcodes (3; 24) sequence the first (27) and second (28) sites are located in such a way that every two adjacent first section (27) is separated by one of the second sections (28).

4. The label according to claim 1, characterized in that the fields (4) of the diffraction bar code (3) contain the first diffractive relief structure (16), the first diffractive relief structure (16) represents the imposition of microscopically small light-scattering relief structure in the first diffraction structure of the zero-order with the first vector (k1) lattice, the intermediate surface (5) bar code (3) contain at least one additional diffractive structure with an additional vector (k) of the lattice, the azimuth of which is different from the azimuth of the first vector (k1) lattice, or mirror surface structure.

5. The label according to claim 4, characterized in that the additional diffractive structure on Prohm is filling surfaces (5) represents the second diffractive relief structure (20), a second diffractive relief structure (20) is formed by overlaying microscopically small light-scattering relief structure in the second diffraction structure of the zero order, while the second vector (k2) of the grating of the second diffraction structure is aimed as an additional vector (k) of the lattice.

6. The label according to one of claim 2, 3 or 5, characterized in that the diffraction patterns of the zero order have the same parameters except for the vectors (k1; k2) arrays.

7. The label according to claim 6, characterized in that the vectors (k1; k2) gratings oriented perpendicular to each other.

8. The label according to one of claims 1 to 5, characterized in that the diffraction patterns of the zero order have a profile with geometrical depth (D), and the value of the geometrical depth (D) is in the range 50-350 nm, and specialnye frequency of the diffraction structures of the zero order are more than 2300 lines per millimeter.

9. The label according to claim 6, characterized in that the diffraction patterns of the zero order have a profile with geometrical depth (D), and the value of the geometrical depth (D) is in the range 50-350 nm, and specialnye frequency of the diffraction structures of the zero order are more than 2300 lines per millimeter.

10. The label according to claim 7, characterized in that the diffraction patterns of the zero order have a profile, the geometric depth (D), moreover, the value of the geometrical depth (D) is in the range 50-350 nm, and specialnye frequency of the diffraction structures of the zero order are more than 2300 lines per millimeter.

11. The label according to one of claims 1 to 5, characterized in that at least one of the layers (10; 11) layered compositions (15) contains the label (18), napechatanie light absorbing paint.

12. The label according to claim 11, characterized in that the part of the label (18) forms a strip (21) of the optically machine readable way, made by the technique of printing the bar code, and strip (21) is separated between them colorless intervals and oriented parallel fields (4) and intermediate surfaces (5) of the diffraction bar code(3; 24; 26).

13. The label according to claim 5, characterized in that at least one of the layers (10; 11) layered compositions (15) contains the label (18), napechatanie light absorbing paint, some labels (18) forms a strip (21) of the optically machine readable way, made by the technique of printing the bar code, and strip (21) is separated between them colorless intervals and oriented parallel fields (4) and intermediate surfaces (5) of the diffraction bar code (3)manufactured by technique of printing bar code is located on the diffraction barcode (3), through the colorless gaps are visible, at least 30% of each field (4) and each about erotichnoe surface (5) of the diffraction bar code (3).

14. The label according to one of claims 1 to 5, characterized in that the microscopically small light-scattering relief structure is a structure from the group formed from isotropic scattering Matt structures, anisotropic scattering Matt structures, kinoforms and Fourier holograms.

15. The label according to claim 6, characterized in that the microscopically small light-scattering relief structure is a structure from the group formed from isotropic scattering Matt structures, anisotropic-scattering Matt structures, kinoforms and Fourier holograms.

16. The label according to claim 7, wherein the microscopically small light-scattering relief structure is a structure from the group formed from isotropic scattering Matt structures, anisotropic-scattering Matt structures, kinoforms and Fourier holograms.

17. The label of claim 8, wherein the microscopically small light-scattering relief structure is a structure from the group formed from isotropic scattering Matt structures, anisotropic-scattering Matt structures, kinoforms and Fourier holograms.

18. The label according to claim 9 or 10, characterized in that the microscopically small light-scattering relief structure is a structure from the group formed from isotropic scattering Matt structures, anisotropically Matt structures, kinoforms and Fourier holograms.

19. Reading device for optically reading information from the tape area (2; 9; 25) on the label (1) under item 4 or 9, consisting of

a) the first reading device (32) for the bar code containing a transparent window (40)extending through the window (40) of the read beam (34) for optical scanning zone (35) read the first photo detector (37)intended for receiving oratorskogo in the area (35) reading light (36) readout beam (34), and located in front of the first photo detector (37) of the first optical polarizing filter (39) to filter out not sufficiently linearly polarized, oratorskogo light (36);

b) a second readout device (42) for the bar code containing a transparent window (40), the second photodetector (43), and the second reading device (42) for the barcode is designed to receive oratorskogo in the area (35) reading light (36) readout beam (34) of the first readout device (32) for the barcode, and located before the second photodetector (43), oriented with a turn at a given angle relative to the first optical polarization filter (39) of the second optical polarizing filter (41) to filter out not the specified image is linearly polarized, oratorskogo light (36);

in the first release (45) first the first photo detector (37) and the second output (46) of the second photodetector (43), which generate electric signals proportional to the intensity oratorskogo on the photodetectors (37; 43) light (36);

g) analyzer (47) signals, connected to the first (45) and second (46) outputs to generate the appropriate bar code (3; 24; 26) the code number for the electrical signals of the photodetectors (37; 43)transferred from the first (45) and second (46) outputs on the analyzer (47) signals.

20. The device according to claim 19, characterized in that there is a logical element (48), each logic element (48) is connected respectively to the outputs (45; 46) of the first and second photodetectors, and the output of logic element (48) is connected by a line (49) with the analyzer (47) signals, and at the same time without the electric signals of the two photodetectors (37; 43) yields (45; 46) logical element (48) takes the line (49) to the analyzer (47) signals the output signal to generate the additional code.



 

Same patents:

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