A device for detecting properties of sheet material

 

The invention relates to a device for detecting properties of a sheet material, such as banknotes or securities, with the help of the reflected light. The technical result consists in the simplicity of the design and the definition and analysis of the magnetic properties of the components of the sheet material. In the projection device unit converts the emitted light block light beam into a parallel light beam, illuminating a line in parallel sheet material plane, and takes the first plane of light at a constant angle. The light reflected at a constant angle along the line of light in the first plane detection, projected onto the detecting unit. Plane detection forms the sheet material of the first angle detection and intersects the plane in which lies the first line lighting along this line. To obtain data on the magnetic properties of the lighting unit emits polarized light beam and the detecting unit by using a polarizer analyzes the light specularly reflected on the specified line lighting. 2 C. and 18 h.p. f-crystals, 14 ill.

The invention relates to a device for detecting properties linecialis part of the independent claim.

From EP-OS 0537531, DE-OS 3815375 and DE-OS 19532877 the known device, in which the sheet material is moved in the direction of transport by the lighting unit and the detecting unit. The lighting unit illuminates the sheet material along the line perpendicular to the conveying direction. The light reflecting sheet material along the line, is detected by detecting unit. The latter is either CCD or photodiode matrix, design and location of which is determined by the local resolution of the reflected light on the specified line. In General, the length of this line is chosen so that it exceeds the width of the sheet material, as measured perpendicular to its direction of transport, allowing you to reach for detecting the entire surface of the floating sheet material.

The above device can effectively detect first diffuse reflected light. However, if the sheet material reflecting mirror elements, as, for example, with metallic gloss protective yarn or printing ink or included in the sheet material components or so-called optically variable properties (AOPS), they are not always their reflectivity is not very large.

In the US 5299268 the described device, which is similar to the above-mentioned devices and in which the sheet material further light on the second line, perpendicular to the direction of transportation of this material. Detection of specularly reflecting components of sheet material is possible by creating a corresponding relationship between the intensities detected on both lines of light.

The disadvantage of these devices is that for detecting the sheet material specularly reflecting components required, first, the relatively high cost of hardware and, secondly, a relatively complex data processing techniques. In addition, none of these devices does not allow to analyze the magnetic properties contained in the sheet material components.

From GB-A 1601362 known device for detecting the sheet material of the protective elements, which can be a picture of the shiny metal magnetic sections differing in coercive force. These areas of light incident at a certain angle of light, and directly reflected under the appropriate angle of the light detected by detecting unit. to determine the value of the coercive force, accordingly, the material informative site. However, with such devices it is impossible to cover sheet material and to determine its properties along a line across the sheet material across its width.

Based on the foregoing, the present invention was based on the task to develop such a device for detecting properties of the sheet material along a certain line using specularly reflected light, which would be of simple construction and which preferably would allow to identify and to analyze the magnetic properties of the components of the sheet material.

According to the invention this task is solved by the distinguishing features specified in the independent claim. Preferred embodiments of the presented in the dependent claims.

The basic idea of the invention is to use a projection unit that converts the emitted light block light beam into a nearly parallel light beam, illuminating a specific line in parallel sheet material plane at a constant angle of incidence of the light beam in the first plane lighting, edenia and crosses the plane, where is the line lighting along this line. Such a projection block feature if possible as close as possible to the line of illumination. The light reflected at a constant angle to the line of light in the first plane detection, projected onto the detecting unit, the plane detection forms the sheet material of the first angle detection and intersects a plane in which lies the line lighting along this line. Thus the angle of incidence of the light beam is chosen equal to the angle of reflection, and the first lighting angle is chosen equal to the first angle detection. To obtain data on the magnetic properties of components of the sheet material of the lighting unit preferably emits polarized light beam and the detecting unit by using a polarizer analyzes the light specularly reflected on the specified line lighting.

The advantage of the proposed invention the device is its simple design and ability to opt-out of labour-intensive methods of analysis of the detected intensity of light, because the light beam, the intensity of which is determined by the detecting unit, basically there are only mirrored components. The use of the polarizer additionally allow to conclude on the magnetic properties of components of the sheet material.

For detection of specularly reflecting components of sheet material and their magnetic properties of the sheet material is directed to move in a plane in which lies the line lighting, so the emitted light block light falls directly on the sheet material and is reflected from mirror components.

To determine the magnetic properties is not specularly reflecting components in the plane in which lies the line of light, a reflector, having the ability to change the intensity of the light reflected under the action of the Kerr effect. When detecting the sheet material passes the specified reflector, resulting in having a permanent magnetization of the magnetic components of sheet material, magnetizing reflector, affect created Kerr effect and change the way the intensity of the reflected light reflector.

Below the invention is explained in more detail on the example of some variants of its implementation and operation principles of the proposed device with reference to the accompanying drawings on which is shown: in Fig.1 - schematic diagram of the first variant implementation of the invention, Fig.2 is a schematic circuit RA is Ista, in Fig.4 is a schematic diagram of a second variant implementation of the invention, Fig. 5 is a schematic diagram of a third variant of execution of the invention, Fig.6 is a schematic diagram of a fourth variant of execution of the invention, Fig.7 - principle of operation of the device according to the first, second or third options of carrying out the invention using non-polarized light in Fig.8 - principle of operation of the device according to the fourth variant implementation of the invention using non-polarized light in Fig. 9 - the first principle of the device using polarized light,
in Fig.10 - second principle of the device using polarized light,
in Fig.11 - the third principle of operation of the device using polarized light,
in Fig.12 - the combination of several devices with different principles of operation according to the second variant implementation of the invention using polarized light,
in Fig. 13 is a table for determining the magnetic properties of specularly reflecting components of sheet material and
in Fig. 14 is a schematic diagram of a second variant implementation of the invention, which uses a reflector, preferably with bright expr is under this scheme emitted from the lighting unit 10 of the light beam 100 is converted by the projection unit 30 into almost parallel light beam 101, the incident angleon the line L lying in a plane parallel to the sheet material 40, and covering the latest on this line. The sheet material 40 is in this case in the plane of the line, resulting in a light beam 101 directly illuminates the sheet material 40. The light beam 111 projected by the projection unit 30 on the line L, is reflected on this line at a constant angleand displayed by the projection unit 51 on the detecting unit 50. In this embodiment, the lighting unit 10, the projection unit 30 and the detecting unit 50 are located in one plane, perpendicular to the plane in which lies the considered line L intersects the plane of the line L. For detecting specularly reflected light anglefall is chosen equal to the anglereflection.

The length of the line L is preferably chosen greater than or equal To the width of sheet material 40. For detection of specularly reflected light sheet material 40 is moved in the conveying direction perpendicular to the plane in which these components are, by the lighting unit 10, projectionarticle dimension across its surface.

The detecting unit 50 preferably has a CCD sensor, which can optionally be replaced by a photodiode matrix. The local resolution of the reflected light along a specified line is determined by the number of pixels (display elements) of the detecting unit 50 and the line length L along which measurements are made. In special applications it is also possible, in which the CCD-matrix, respectively photodiode matrix will have only one single pixel.

The lighting unit 10 preferably emits polarized light, which can be obtained, for example, using a laser diode or incandescent lamp with an appropriate polarizer. To determine the magnetic properties of specularly reflecting components of sheet material 40 in the path of the light beam 100, 101, 110, 111 between the lighting unit 10 and the detecting unit 50 may be provided, for example, a quarter-wave plate 31 and/or polarizers 52. Optionally, you can provide a source 32 of a magnetic field, accordingly affecting the magnetic properties specularly reflecting components of sheet material 40. Read more the principle of operation of the device for measuring magnetic Voisine schemes of various types of light reflection. In Fig.2A shows the principle of diffuse reflection of light at which a certain slantthe light is uniformly reflected in all directions. For detecting light diffusely reflected at a certain anglethe intensity of the detected light depends on the sectorreflection angle covered by the detecting unit. The intensity of the incident light in General significantly higher detectable intensity.

In shown in Fig.2B variant with a mirror reflection of the incident at a certain anglethe light is totally reflected in the direction of the anglereflection, and the anglethe fall of a light beam is equal to the anglereflection. The light intensity measured by the detecting unit in the angular sectorbasically equal to the intensity of the incident light. Same is true in the case when the anglethe incidence varies from sectorangle of incidence, where the sectorangle of incidence is equal to the sectorangle of otragenija 111 even in the case when the light beam 101 is only mostly parallel light beam. Minor deviations in parallelism compensates for the sectorreflection angle of the detection of the reflected light beam 111.

When choosing a relatively small value for the sectorangle detected light beam 111, the intensity of the diffuse reflected light effect described above becomes negligible compared to the intensity of specularly reflected light. Thus, the detecting unit 50 detects essentially only specularly reflected light components.

In Fig.3 shows a General schematic diagram of the arrangement of the individual components of the device. To simplify the lighting unit 10, the projection unit 30, the detecting unit 50 and the projection unit 51 shown in Fig.3 only lines, respectively points.

In this General case, the light beam 100 emitted by the lighting unit 10 to the second plane In the2lighting, forming with the plane ELline lighting the second angle2the lighting. The projection unit 30 deflects the light beam 100 in the form of a light beam 101 in the first pleskot and crossing a specified plane ELon the line L. In the first plane In a1lighting line L light falling at a constant anglethe parallel light beam 101.

The light beam 111 is reflected by the line L in the first plane D1detecting at a constant angleprojected on the detecting unit 50, the first plane D1detection forms with the plane ELthe first corner1detection and intersects the specified plane ELline L. For projecting the reflected light beam 111 to the detecting unit 50 projection unit 30 deflects the reflected light beam 111 in the form of a light beam 110 to the second plane D2detecting forming sheet material 40 second angle2detection.

For detection of specularly reflected light anglethe fall of a light beam set equal to the anglereflection, and the first angle1lighting is equal to the angle1the detection. The second angle2lighting and the second angle1In2lighting, respectively planes D1D2detecting changes accordingly.

In Fig. 3b and 3C presents the corresponding projection on the side of the variant according to Fig. 3A. When this plane E is perpendicular to the plane ELline lighting and intersects the specified plane ELline L.

In Fig.4 shows a second embodiment of the invention, in which the first angle1lighting is equal to the first corner1detection and both, they make up almost 90o. Anglethe fall of a light beam is selected equal to the anglereflection and 90o. This arrangement allows the projection unit 30 in the form of a single component and as a result further simplify the construction of devices which serve as the focus of the projection unit 30. The emitted light beam 100 falls on the projection unit 30 above its median plane. The reflected light beam 111 extends from the projection unit 30 below its median plane in the form of a light beam 110, rejected at the second angle2the detection. In this embodiment, it is possible to arbitrarily select either the second angle2lighting, or the second angle2the detection. On the basis of the optical properties of the projection unit 30, the second angle2lighting in any case equal to the second corner2the detection. For clarity, the second angle2lighting and the second angle2detection shown in Fig.4 is relatively large. In practice, however, their value is usually chosen as small as possible. Deviation of the first corner1lighting and the first corner1detecting from the 90ogenerally so low that the drawing they are not shown.

Another advantage of this variant is that thanks to perpendicu not affect the intensity of the detected light beam 110.

In Fig.5 is a schematic diagram of a third variant of execution of the invention, generally corresponding to the second variant. However, unlike the second option in this case and the second angle2lighting is chosen equal to the second angle2/detection and 90o.

With this arrangement, the components of the device occurs some problem, consisting in the fact that the lighting unit 10 and the detecting unit 50 at least seem to be located on the same axis perpendicular to the sheet material 40. In order to avoid the resulting problems, such as blocking these/shading detecting unit 50 of the lighting unit 10, in this embodiment, the lighting unit 10 consists of a number of lighting elements 11 arranged around the projection unit 51. Due to such arrangement of the lighting unit 10 of the projection unit 30 converts the emitted light beam 100 only in the almost parallel light beam.

Any deviations in the parallelism of the light beam 101 is shown in Fig. 5A. However, as mentioned above, they can be compensated for by appropriate software is also the different directions of the rays of the illuminating light beam 101 has a certain advantage, which is the ability to compensate for those deviations in the location of the object, which arise as a result of its inclination relative to the plane of detection.

In Fig. 6 is a schematic diagram of a fourth variant of execution of the invention, generally corresponding to the third option. In order to avoid the above described problems in the path of the light beam 100, 110 establish a beam splitter 20, which transmits at least part of the light beam 100 emitted from the lighting unit 10, and a reflecting direction of the detecting unit 50 at least part of the light beam 110 reflected by sheet material 40. Thus in this case, you can avoid unwanted shading/zamorajivanie device components. If necessary, you can also swap the lighting unit 10 and the detecting unit 50.

Below with reference to Fig.7-11 explains the principles of operation of the proposed device.

In Fig. 7 shows the principle of operation of the device according to the first, second and third variants, while the lighting unit 10 emits unpolarized light, which, in each sleepoversgranny light on the sheet material, where that falls on different parts. While the section 41 is a plot of diffuse reflection of light, the section 42 corresponds to a metal area with mirror, and a portion 43 corresponds to the mirror magnetic area with magneto-optical Kerr effect.

Falling on one of these sites light represents, as stated above, 50% horizontally and 50% vertically polarized light. When falling on diffuse reflecting section 41 part vertically polarized light is divided into light, which in turn has a 50% vertical polarization and 50% horizontal polarization. The same thing happens with falling on this area horizontally polarized light. Thus, reflected a similar plot 41, the light is again 50% vertical and 50% horizontal polarized light.

On the specularly reflective metal section 42 polarization is stored as the vertically and horizontally polarized light. Thus, the reflected plot 42, the light is again 50% vertical and 50% horizontal polarized light.

Mirror magnetic section 43 changes, for example, under de the polarized light is reflected by section 43 mainly in this case 95%, as vertically polarized light, and a small amount, in this case 5%, as horizontally polarized light. The same thing happens with incident light having horizontal polarization. In the corresponding summation of these components reflected by section 43 of the light in this case is 50% horizontally and 50% vertically polarized light.

The ratio between the vertically and horizontally polarized reflected light on plot 43 largely depends on the magnetic properties of the components of the sheet material 40. The specified percentage is 95% and 5% in this case is arbitrary and serves only to illustrate the occurring effects.

After that, the projection unit 30 projects reflected from sections 41-43 light on the detecting unit 50. Due to the proposed invention, the layout of the components is essentially precluded the detection of the detecting unit 50 of the light diffusely reflected by section 41. Light, reflected specularly reflecting metal section 42 and mirror magnetic section 43, the detecting unit 50 detects almost entirely in the form of unpolarized St is subramania. In this case, the lighting unit 10 also emits unpolarized light. Last fall then first beam splitter 20, which transmits 50% vertically, respectively, horizontally polarized light components. After that, the projection unit 30 projecting above mentioned components of the light beam into sections 41-43 of sheet material 40. The reflection of light occurs when this is similar to the principle of Fig.7. The light reflecting sections 41-43, in turn falls into the projection unit 30, which in this case projects through a beam splitter 20 to the detecting unit 50 only light, mirrored sections 42, 43. While the beam splitter 20 is reflected by the detecting unit 50 only 50% vertically, respectively, horizontally polarized components of the reflected light.

Similarly, the principle of operation shown in Fig.7, the detecting unit 50, and in this case detects only light, mirrored sections 42, 43 respectively. However, in contrast to the example according to Fig.7, in this embodiment, the light comes into the detecting unit 50 with only a quarter of its intensity.

To sum up the foregoing, it should be noted that embodiments of the invention first to fourth enable onanti sheet material 40. In this case, however, it is impossible to analyze the magnetic properties of these components. In the above examples to simplify the possible loss, for example, as a result of absorption and scattering of light by the various elements of the device as a whole were not taken into account.

Below with reference to Fig.9-11 explains three of the principle of the proposed device using polarized light, in addition to analyze the magnetic properties specularly reflecting components of sheet material 40. In all these examples explaining the above operation, the lighting unit emits polarized light, which in this case is to demonstrate the resulting effects is 100% vertically polarized.

In versions of the invention from the first to the third polarized light emitted from the lighting device 10, falls directly into the projection unit 30. In the fourth embodiment provides the polarizing beam splitter 20, which transmits vertically polarized light and reflect horizontally polarized light, allowing the vertically polarized light emitted from the lighting unit 10 and completely overlooked by the beam splitter 20, padgo on the third between the projection unit 30 and the detecting unit 50 includes a polarizer 52, only passes horizontally polarized light. In the fourth embodiment, under the action of polarizable beam splitter 20 in the detecting unit 50 drops only a horizontally polarized component of the light beam reflected by sheet material 40.

The first of these examples, explaining the principle of the device illustrated in Fig.9, the beam path between the projection unit 30 and the sheet material 40, as well as on the beam path between the sheet material 40 and the projection unit 30 is provided by a quarter-wave plate, which converts, for example, vertically polarized light in premiercolor polarized light and horizontally polarized light in levelinglarne polarized light, respectively premiercolor polarized light into vertically polarized, and levelinglarne polarized light into horizontally polarized light.

Upon reflection from the diffuse reflecting section 41 of the incident premiercolor polarized light is converted by 50% in premiercolor polarized light and 50% in levelinglarne polarized light. When reflecting premiercolor polarized light from the mirror from the. the ri reflection premiercolor polarized light from the reflecting mirror magnetic section 42 such light mainly, in this case 95%, is converted to levelinglarne polarized light, and a small part of it, in this case 5%, is stored in the form of premiercolor polarized light. When passing the reflected light through a quarter-wave plate 31 is re-transformation with circular polarization components of the light beam into a linearly polarized components, which are then analyzed by the polarizer 52, respectively, of the polarizing beam splitter 20 in accordance with the description above.

Thus, in the example explaining the first principle of the proposed device using polarized light, is not provided by the detection of the detecting unit 50 of the intensity of light diffusely reflected the reflecting section 41. The intensity of light reflected from metallic reflective section 42, the detecting unit 50 detects completely, while the intensity of light reflected specularly reflecting magnetic section 43, below a certain value, in this case 5%. This solution makes it possible to distinguish the emer, illustrating the principle of the proposed device using polarized light, but without application used according to the first principle of operation of a quarter-wave plate 31, resulting in a vertically polarized light directly illuminates the sheet material 40. Lots 41-43 reflect light the same way as described already above example in Fig.7. Through additional analysis of the reflected light by the polarizer 52, respectively, of the polarizing beam splitter 20 is no light reflected by sections 41 and 42, does not fall in the detecting unit 50. The detecting unit 50 detects only the component of light, in this case 5%, which is reflected from the reflective magnetic section 43. Thus, the second principle is based on the use of polarized light, can detect only a mirror reflecting the magnetic sections 43 of sheet material 40.

The third example illustrating the principle of the proposed device using polarized light and is shown in Fig.11, mainly corresponds to the second example, which uses polarized light, in the area of sheet material 40 are additionally provided is carried out in such a way, so basically, in this case, 85%, to maintain the polarization of light reflected specularly reflecting metal section 42, and to a smaller extent, in this case 15%, change the direction of its polarization to another.

When the orientation of the magnetic components of section 43 of the magnetic field generated by a source 32, they are oriented in the direction opposite to the magnetic field created by the source 32, resulting in the intensity of this magnetic field, and thus the rotation of the polarization plane accordingly. In this example, the magnetic components section 43 causes the reduction of the intensity of the magnetic field created by the source 32, resulting in the polarization components of the light beam in the main, in this case 90% is retained. In some parts, in this case 10%, the polarization of the light changes.

In this example, as well as in any other example, illustrating the operation principle of the proposed device, the light diffusely reflected from the reflecting section 41, is not detected. Because the magnetic components of sheet material 40 in the reflective magnetic section 43 of this sheet material 40 reduce the intensity magnetic section 43, equal in this case 10%, also below the component, in this case 15% of the intensity of light reflected by a metal section 42, which allows in this case to distinguish between light reflected from the metal and from the magnetic sections.

In Fig. 12 shows the combination of several devices according to the second variant implementation of the invention, in which use different principles of work with the use of polarized light. Projection units 30 projecting perpendicularly to the sheet material 40 emitted from the lighting unit 10 of the light beam 100, and a projection unit 30 through the projection unit 51 projects the reflected sheet material 40 light beam 111 in the form of a light beam 110 to the detecting unit 50. Before moving to the detecting unit 50 light beam 110 passes through the polarizer 52, which transmits similarly uses polarized light to the examples from the first to the third only vertically polarized components of the light beam 100.

To provide the opportunity to distinguish magnetically hard and magnetically soft components of sheet material 40 provide another source 33 of the magnetic field, which pre-magnetizes the magnetic what cinecom 32. As creating a magnetic field sources 32, 33 respectively can be used, for example, permanent magnets or coils with current.

In Fig. 13 shows a table for determining and analyzing the magnetic properties of specularly reflecting components of sheet material 40 with the above in her intensity indicators defined by the detecting unit 50, on separate devices with different layouts.

The first device with the projection unit 30 and a quarter-wave plate 31, as shown in Fig.9, detects 100% of the intensity of light reflected from the metal components, and 95% of the intensity of light reflected from magneto-solid components. Due to the absence of an external magnetic field the behavior of the soft-magnetic component in this case is similar to the behavior of metal components, which thereby allows the detecting unit 50 to detect 100% of the light intensity.

The second device has only one projection unit 30, which allows, as shown for example in Fig. 10, to detect only 5% of the intensity of light falling on a magnetic solid components of the sheet material. The intensity of light reflected from the metal, respectively, the soft-magnetic component is 32 magnetic field, parameters generated which magnetic fields are chosen in such a way that it could not Orient the soft-magnetic components of the sheet material. As follows from the description to Fig.11, the intensity of light reflected from the metal components sheet material 40 under the action of magnetic field created by the source 32, is 15%. Magnetic solid components of sheet material, as mentioned above, previously part is subjected to application source 33 of the magnetic field in such a way that they reinforce the strength of the magnetic field from the source 32 and increased due to this detektiruya detecting unit 50, the light intensity, in this case up to 20%. The orientation of the soft-magnetic components of sheet material 40 in a magnetic field from a source 32 is in the opposite direction, with the result that they weaken the magnetic field from a source 32, as detected in this case the light intensity is only 10%.

Detected parameters of the light intensity allow us to conclude on the magnetic properties of specularly reflecting components of sheet material 40. On the basis of the measurement made by the second device, you can define the properties of a magnetic solid is now sheet material 40 can, for example, to form the ratio of the intensity of light received by the third device, with the corresponding parameters of the intensity of light received by the first device. Thus, from the above it follows that the ratio of the intensities of light reflected from metal components, equal in this case to 0.15, is always greater than the ratio of the intensities of light reflected soft-magnetic components of the sheet material 40 which in this case is 0.1.

Thus, by combining appropriately a few proposed in the invention device can be further split mirror components of sheet material 40 on their magnetic properties on metal, magnetically soft and magnetically hard.

In the above-described versions of the invention the sheet material 40 located in the plane ELline lighting. On is shown in Fig.14 circuit diagram showing the second option, where in the plane ELline of lighting is provided a reflector 33. The latter is on the line L mirror magnetic section, similar to section 43 of sheet material 40 and preferably has a pronounced Kerr effect.

eye 10 polarized light beam 100 behavior when the reflection is similar to the behavior of a light beam in the above and shown in Fig.9, 10 and 11, examples, explain the principles of operation of the device, for section 43 of sheet material 40.

With the passage of sheet material 40 by the reflector 33 in the process of detecting magnetic components of sheet material 40 affect the Kerr effect of the reflector 33, causing in accordance with the above principles, the change in detected light intensity.

Obviously, if necessary, can be modified and the first, third, and fourth embodiments of the invention, by setting the manner described above in the appropriate place the reflector 33.

The advantage of these embodiments of the invention is the ability to detect and magnetic properties of the components of sheet material 40, not having a mirror.

Thus, by combining appropriately described above options can be used to detect specularly reflecting components. If necessary, you can define and magnetic properties such specularly reflecting components. In addition, you can obtain information about the magnetic properties of the magnetic components of sheet material 40, not having a mirror.

Proposed in the invention device allows the m Kerr. To improve the reliability of the protection document, the document may be specularly reflecting components variously expressed by the Kerr effect, which is able to distinguish between, for example, one proposed in the invention device. The Kerr effect at specularly reflecting components preferably should be relatively pronounced in order to ensure high reliability of detection.

These components can be arranged in the form of figures and/or codes. They can be applied to a document, such as printing ink or enable, respectively, to seal in the material document in the form of particles or protective threads.


Claims

1. A device for detecting properties of a sheet material, such as banknotes or securities, using reflected light, having a lighting unit (10) located in relation to the sheet material (40) at the second angle (2) light and radiating the light beam (100), and the detecting unit (50) that is located relative to the sheet material (40) at the second angle (2) detection and detecting light (110) directly reflected the Fox and the line (L) lighting, lying in parallel sheet material (40) plane (EL), focal length which is selected so that the lighting unit (10) and another projection unit (51) of at least approximately located in its focal plane, which converts emitted from the lighting unit (10) divergent light beam (100) in a nearly parallel light beam (101), which, falling at a constant angle (), covers the line (L) in the first plane (In1) lighting, with the first plane (In1) lighting forms with the plane (EL), which is the line of lighting, the first angle (1) lighting and crosses a specified plane (EL) on this line (L), and which projects the reflected line (L) light in the first plane (D1) detection at a constant angle () light beam (111) on another set before the detecting unit (50) projection unit (51) so that the latter covers the aperture in the main those light beams which are reflected on the line (L) lighting so that their axes had in relation to the line (L) angle () reflection of alerts to inform, the first angle (1) detection and crosses a specified plane (EL) on this line (L) and angle (fall of a light beam is equal to the angle () reflection, and the first angle (1) lighting equal to the first angle (1) detection.

2. The device under item 1, characterized in that the lighting unit emits a light beam (100) in the second plane (In2) lighting, forming with the plane (EL), which is the line of lighting, the second angle (2) lighting and projection unit (30) deflects the emitted light beam (100) in a first plane (In1) lighting.

3. The device under item 1, characterized in that the projection unit (30) deflects a light beam (111), shown on line (L) light in the first plane (D1) detecting, in the second plane (D2) detection, forming with the plane (EL), which is the line of lighting, the second angle (2) detection.

4. The device under item 1, characterized in that the first angle (1) lighting equal to the first angle (fall of a light beam is equal to the angle () reflection and 90oand the lighting unit (10) located around the detecting unit (50).

6. The device under item 1, characterized in that the path of the light beam (100, 101, 111, 110) between the lighting unit (10) and the detecting unit (50) includes a beam splitter (20).

7. The device according to p. 6, characterized in that the beam splitter (20) made in the form of a polarization beam splitter.

8. The device under item 1 or 6, characterized in that the path of the light beam (100, 101, 111, 110) between the lighting unit (10) and the detecting unit (50) has at least one polarizer (52).

9. Device according to any one of paragraphs. 1-8, characterized in that the path of the light beam (100, 101, 111, 110) between the lighting unit (10) and the detecting unit (50) is provided for at least one quarter-wave plate (31).

10. Device according to any one of paragraphs. 1-9, characterized in that the path of the light beam (100, 101, 111, 110) between the lighting unit (10) and the detecting unit (50) has at least one reflector.

11. The device under item 1, characterized in that the lighting unit (10) emits polarized light.

12. Ustroystvo by p. 1, wherein the detecting unit (50) has a CCD sensor.

14. The device under item 1, characterized in that the detecting unit (50) has a photodiode matrix.

15. The device under item 1, characterized in that the line (L) lighting as long as the width (In) sheet material (40).

16. Device according to any one of paragraphs. 1-15, characterized in that the sheet material (40) is located in the plane (EL), which is the line of lighting.

17. Device according to any one of paragraphs. 1-15, characterized in that in the plane (EL), in which the line of light, a reflector (33).

18. The device under item 17, characterized in that the reflector (33) is made with the ability to change the intensity of the light reflected under the action of the Kerr effect.

19. Protected from a fake document with specularly reflecting components variously pronounced Kerr effect, characterized in that the specified components printed on the document using the printing ink and/or put, respectively, embedded in the material document in the form of protective threads.

20. The document under item 19, characterized in that the specified components are placed on and/or in the document in the form of figures and/or codes.

 

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FIELD: magnetic thread recognition means.

SUBSTANCE: method provides for relative movement between thread and matrix of magnetic heads; each head generates a signal in case of detection of a portion of thread. Approach of thread to one of heads is detected, while this head is marked as main head, and heads on each side of the latter - as secondary heads. Output signals from main and secondary heads are controlled for forming of an image of thread signals amplitudes from main and secondary heads are compared, so that if amplitude of output signal from secondary head exceeds amplitude of signal from main head, then secondary and primary heads are appropriately reassigned.

EFFECT: higher speed of operation, higher efficiency.

6 cl, 17 dwg

FIELD: protective devices, in particular, protective threads using multiple detectable protective elements.

SUBSTANCE: detectable protective elements mainly contain unnecessarily repeating drawing of discontinuous metallic/magnetic marks and discontinuous metallic signs or signs formed of metallic points. Detectable protective elements can also include at least one metallic stripe, extended along length of carrying substrate and/or multiple metallic points, positioned on portions free from metal of at least one surface of substrate.

EFFECT: device has multiple detectable protective elements, some of which are not easily detected and recognized during visual observation of protective device.

3 cl, 5 dwg

FIELD: engineering of means for studying properties of sheet material, bank notes for example.

SUBSTANCE: in accordance to invention, bank notes are researched having magneto-optical layer with optical properties changing under influence of magnetic properties of object. During research, light source is utilized for light generation and injection of light into magneto-optical layer. Detection of light passing through magneto-optical layer and/or reflected by aforementioned layer is performed. Light source and magneto-optical layer are positioned so, that light injected into magneto-optical layer expands mostly in parallel to main surface of this magneto-optical layer.

EFFECT: increased precision and reliability of research of magnetic properties of sheet material.

3 cl, 4 dwg

FIELD: textile; paper.

SUBSTANCE: invention concerns measurement means for physical properties of sheet material. Sensor device for optical measurement of at least two different properties of sheet materials, particularly banknotes (100), includes common measuring window (2), to which at least two sources (B1, B2) of different electromagnetic emission suitable for measurement of different properties are directed. One or more detectors (D1-D3) directed towards measuring window detect reflected, reradiated, missing and/or fluorescent emission. In particular, measuring window can hold magnetic to optic converter (5) for detection of magnetic properties in sheet material which features dichroic reflector coating (5c) and reflects emission used in magnetooptic measurement at one wavelength band while missing emission at another wavelength band. Such multipurpose sensor device can be compact and perform control of most different physical properties.

EFFECT: measurement of maximum number of different properties of sheet material by a compact device.

12 cl, 10 dwg

FIELD: instrument engineering.

SUBSTANCE: invention concerns banknote identifying and counting machines. The machine comprises involves a banknote feeder; feed/carry unit for single banknote feed and carrying over with a tape feed; identifying/counting unit arranged on an underside of the feed/carry unit to identify a name and count banknotes carried over; storage box for banknotes that have been detected and judged as conforming with norm. In addition, the machine accommodates a storage means of the information relative to banknote characteristics wherein the information relative to banknote characteristics as referred to various exchange systems is stored in sections for each exchange system; selection/installation means used to detect conformity of exchange system of banknotes to be process with one specific key that have been selected and carrying over of banknotes depending on pressing the specific key.

EFFECT: invention allows displaying a monetary unit of the exchange system.

6 cl, 5 dwg

FIELD: printing.

SUBSTANCE: invention also relates to a valuable document, translated materials and methods of manufacture of such protective elements and other valuable documents, as well as to the method and device for verification of such a protective element, respectively, a valuable document. A valuable document contains a security element, equipped with at least two magnetic materials with different amount of coercitive force, but with basically the same remanent magnetic induction.

EFFECT: high degree of protection against forgery, with the simplicity of manufacturing.

20 cl, 8 dwg

FIELD: testing equipment.

SUBSTANCE: invention is related to facilities for investigation of magnetic properties of objects (BN), first of all, sheet material, such as, for instance bank notes, with application of magnetooptic layer having magnetic domains. In method and device optical properties of magnetic domains in magnetooptic layer are influenced by magnetic properties of investigated object (BN), at least one source of light (2) for radiation of light falling on magnetooptic layer (42), and at least one detector (6) for reception of light passing through magnetooptic layer (42) and/or reflected by it, and with creation of magnetic field (BN), which spreads in area of magnetooptic layer (42) substantially parallel to its surface.

EFFECT: improved accuracy and reliability of research.

16 cl, 4 dwg

FIELD: information technology.

SUBSTANCE: protective element, particularly for banknotes and bank cards, has a substrate on which there is at least one opaque layer (2) and symbols and/or marks (3) are formed in regions of at least one opaque layer (2), containing, at least in the symbols and/or marks, one or more magnetic elements (4, 6) which are visible in at least transmitted light.

EFFECT: simple manufacture and verification of documents.

34 cl, 10 dwg

FIELD: information technology.

SUBSTANCE: valuable document, transferrable material and a method of verifying such a protective element of the valuable document are also described in the claim. One or more, at most five, magnetic areas and one or more, at most five, empty areas lie along the protective element, for example, along the longitudinal direction thereof. The length of the magnetic areas or empty areas along the protective element is preferably selected such that magnetic signals from neighbouring boundaries of magnetic or empty areas, where there are magnetisation jumps arising when the protective element moves past a magnetosensitive sensor, constructively interfere with each other.

EFFECT: simple verification of a protective element.

25 cl, 8 dwg

FIELD: information technologies.

SUBSTANCE: reading sensor suitable for reading a protection element having magnetic areas with different coercitivity, and comprising at least one first reading head and at least one second reading head, which are arranged in parallel to each other and are arranged as capable of detecting two separate sequences of signals, besides, a permanent magnet is arranged between the specified reading heads, and the specified first and second heads are arranged at the angle relative to the specified element of protection regardless of the direction of displacement of the specified element of protection relative to the mentioned sensor.

EFFECT: providing of the possibility to read elements of protection having magnetic areas with different coercitivity.

13 cl, 11 dwg

FIELD: product authentication.

SUBSTANCE: system has at least one material, providing transformation with frequency increase, as protective marking and one authenticating apparatus, which has one source of electromagnetic radiation with one previously selected wave length and one second electromagnetic radiation source with one second previously selected wave length, which are different from each other and are selected in such a way, that they cause emission by material, providing for transformation with frequency increase, of electromagnetic radiation after combined irradiation by emission with first and second wave lengths, and emitted electromagnetic radiation has radiation with one additional third wave length, specific for return of one electron from activation ion energy level to level, at which electron is excited by combined emission with first and second wave lengths.

EFFECT: higher efficiency.

6 cl, 2 dwg

FIELD: technologies for protecting valuable products from forgery.

SUBSTANCE: passive protective means is formed on product, having given structure, which makes it possible to control presence and authenticity of aforementioned means by physical analysis method by resonance effect in process of external influence on it by probing electromagnetic radiation of given radio frequency and detecting parameters of certain informative signs in resonance response of protective device for aforementioned external influence with following automatic comparison of registered parameters of these informative signs with standard values. As passive protective means, metallized, at least, three-layered resonance filter structure is utilized. As probing radiation, radio-frequency of UHF spectrum is utilized, as informative signs, characteristic peak values of frequency characteristic of direct transmission and reverse reflection coefficients are utilized.

EFFECT: minimal costs of industrial realization.

6 cl, 5 dwg

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