BG99433A - Method and device for recording and reading of optical information - Google Patents

Abstract

A method of recording and reading multi-level multimedia protection for marking of securities and counterfeit products, characterized by multilevel independent generation of markings that they manage through a computer beam recording a corresponding mark on an optical layer step by level for the different degrees of protection, mapped and read in one production and / or control process, the different levels being bound to independent databases and / or paramedics-protected parameters products and securities. A method according to claim 1, in the case of automatic reading, at least one optical is compared and checked an independent cipher from a control multimedia disc and the multimedia thread, for itself and selectively by compute ciphers, depending on the base data on the control media disk drive.

Description

METHOD AND DEVICE FOR RECORDING AND READING

OPTICAL INFORMATION

Technical field

The invention relates to a method and apparatus for recording and reading optical information and is applicable to the recording and reading of security markings against counterfeiting of securities, particularly in banking for the production and control of banknotes.

BACKGROUND OF THE INVENTION

A method for recording and reading optical information, including generating a signal containing the information, is known. The received signal through a computer controls the deflection system of the laser, which bears a mark on the media. Feedback is monitored during recording. The record thus obtained is compared with the reference [1].

Also known is a device for recording and reading optical information, which consists of an input signal forming unit representing a sensor connected to a computer, comprising a series-connected analog narrowband filter, a reference with an analog-to-digital converter, and a second analog-to-digital converter with step register. The computer is coupled to an actuator block consisting of a series-connected digital stabilized compensator, averaging unit, and an action block whose output is connected via a feedback loop to the sensor input [1J.

Technical nature

A method of recording and reading optical information, comprising generating a signal containing information that controls, through a computer, the deflection system of a laser beam affixing a mark on a carrier. The recording is controlled by a feedback circuit and then compared to a reference one. According to the invention, the input signals are at least two, are generated by respective independent generators, and then mixed into the control computer. Each of the signals contains information about one of the parameters for writing graphic symbols and is recorded individually in a terminal block on multimedia media, different for each security level. The marked security document is checked for validity by comparing the recorded at least two parameters and eliminating any inconsistencies.

The technical nature is also clarified by another variant in which the parameters of the drawing of graphic symbols are a function of

- 3 other types of security information on the security document.

The essence is also clarified by a device for recording and reading optical information, including a block for generating an input signal connected to a control computer, which in turn is connected to an actuator covered by a feedback circuit. According to the invention, the input signal generating unit consists of at least two degrees of protection, each of which contains one random number generator, each of which is associated with its marking and its carrier, respectively. The output of each of the random number generators is connected to a control computer, which in turn is connected to the laser deflection system. The control computer is connected to a filing board, on which a valuable document is mounted with a built-in security medium, under which is located the first automatic reader connected to one of the inputs of the auxiliary comparator forming the first automatic reader feedback circuit. The other input of the auxiliary comparator is connected to the unified output of the markings. The output of the auxiliary comparator is connected to the control computer. A fitting block is installed after the feeder, followed by a distribution block comprising a second automatic reader and a terminal control unit. The second automatic reader is connected hierarchically in series with one of the inputs of blocks for counting banknotes, and their other input is connected respectively to the outputs of the media. The terminal control unit is connected to each of the third inputs of the banknote reporting units. The outputs of these blocks are connected respectively individually to blocks for the final recording of each level of protection on multimedia media, which also have standard protections against permissions floppy disks and hardware chips.

The advantages of the invention are that

- 4 counterfeiting of securities is practically impracticable because of the huge number of possible combinations between the individual parameters (distance, font thickness, intentional defect, etc.), which is the result of multilevel protection. The number of security combinations is even greater because the parameters of the graphic symbols are a function of face value, currency type and banknote numbering. In addition, there is an opportunity for hierarchy by authorized persons to check every level of protection, while revealing the logic of a degree does not lead to revealing the logic of the others, since each of them is independent. Multilevel protection allows for integration at certain levels and international standard protection requirements.

Description of the attached figures

FIG. 1 - Block diagram for reading and writing the security mark

FIG. 2 - Block diagram of 7-step protective maceration

Examples of implementation

The security marking recording and reading device consists of seven security levels 1-7, each containing one random number generator 8-14. The first level of protection of 1 step of block letters is the abbreviation BNB, written three times, the distances between the letters in one abbreviation are the same and the distances between the abbreviations are different. The second level of protection 2 step in the block includes the first level 1, the distances between the letters in one abbreviation are different. Third level of protection

- The 5th corner of the block includes the first two grades 1 and 2, the letters being spelled differently. The fourth degree of protection 4 uneven font includes the first three grades 1-3, with the individual letters spelled out. The Fifth Degree of Protection 5 font sizes include the first four grades 1-4, with letters in different font sizes. The sixth Degree of Protection 6 target defect includes the first five stages 1-5, with a deliberate defect in the form of white dots when spelled out. The seventh security grade 7 font thickness includes the first six grades 1-6, the letters are in different font thicknesses. In the last two levels of protection 6 target defect and 7 font thickness, only one BNB abbreviation is shown in the figure.

Each of the random number generators 8 - 14 is associated with its own marking 15 - 21 and its carrier 22 - 28 respectively. of the input signal 28a. The output of each of the random number generators 8-14 is connected to a control computer 29, which in turn is connected to the diversion. system 30 of laser 31. The control computer 29 is connected to a feeder board 32 on which a banknote 33 is mounted with a built-in security carrier. Below the security bearer is a first automatic reader 34 connected to one of the inputs of the auxiliary comparator 35 forming a feedback loop with the first automatic reader 34. The other input of the auxiliary comparator 35 is connected to the integrated output 35a of markings 15-21 _. containing second automatic reader Oats and end control unit 37. second automatic reader

- 6 366 is connected in series hierarchically to one of the inputs of blocks for counting banknotes 38 - 44. The other input is connected respectively to the outputs of carriers 22 - 28. The terminal control unit 37 is connected to each of the third inputs of the blocks. for reporting of scrapped banknotes 38-44, and the outputs of these blocks are connected respectively to end-to-end blocks on multimedia media 45 - 51 for each degree of protection individually. The 45-51 multimedia media also comes with standard protection from permission disks and hardware chips.

Use of the invention

The optical information recording and reading device works as follows: The seven degrees of protection are generated by seven parallel-working and independent random number generators 8 - 14, which define different degrees for each mark 15 - 21. The degrees generated are they are recorded on media 22-28, and the current ones are fed to a control computer 29 which mixes them and controls the deflection system 30 of laser 31. The banknote is marked. 33, incorporating a built-in security carrier, is mounted on a feeder board 32, which is commanded by the control computer 29. The laser beam 31 records on the security carrier all degrees of protection 1-7 simultaneously. The control computer 29 adjusts the intensity, focus, and other parameters of the laser beam. 31. by feedback provided by the first automatic reader 34 and the auxiliary comparator 35, in which the read record is compared with that of markings 15-21. In the final control unit 37, the parameters of the fit banknotes (currency type, banknote denomination, numbering) defined by the manufacturer and controller

- 7 are complementary to the media 22-28 through the second automatic reader 366. The scrapped banknote reporting units 38 - 44 report marriage and in the media recording blocks on the multimedia recorder 45 - 51 a separate update is made for each security level. fit banknote security marking.

Claims (4)

Patent Claims 1. A method of recording and reading optical information, comprising generating a signal containing information that controls, through a computer, the deflection system of a laser beam, affixing a mark on a carrier, the recording being controlled by a feedback circuit, after which the recording is compared with a reference one, characterized in that the input signals are at least two, are generated by respective independent generators (8 - 14) and then mixed into the control computer (29). and each of the signals contains information about one of the parameters for writing graphic symbols, each of which is recorded individually in a terminal block (45 - 51) on multimedia media different for each security level, and the marked valuable document is checked for validity by comparison on the recorded at least two parameters and with any discrepancy is eliminated. 2. A method for recording and reading optical information according to claim 1, characterized in that the parameters for drawing graphic symbols are a function of another type of security information affixed to the valuable document. 3. Optical information recording and reading device including an input signal forming unit coupled to a control computer, in turn connected to an actuator, covered by a feedback circuit, characterized in that the input forming unit signal (28a) consists of at least two stages of protection (1 - 7), each of which contains one random number generator (8 - 14), each of which is associated with its mark (15 - 21), respectively. and its carrier (22 - 28), and the output of each of the random number generators (8 - 14) is The control computer (29), which in turn is connected to the deflection system (30) of the laser (31), the control computer (29) is connected to a feeder (32) on which a valuable document (33) is mounted. ) with a built-in security carrier under which is located a first automatic reader (34) connected to one of the inputs of the auxiliary comparator (35) forming a feedback circuit with the first automatic reader (34) and the other input of the auxiliary comparator ( 35) is connected to the combined output (35a) of the markings (15 - 21), the output of the auxiliary comparator (35) being the control computer (29), and after the feeder (32) an embedding block (36) is installed, followed by a distribution block (36a) comprising a second automatic reader (366) and a terminal control block (37) , the second automatic reader (366) being connected hierarchically in series with one of the inputs of the banknote counting units (38 - 44) and the other input connected respectively to the outputs of the media (22 - 28), such as the block for. the end control (37) is connected to each of the third inputs of the banknote counting units (38 - 44), and the outputs of these units are connected respectively to the end record units (45 - 51) respectively of each security level ( 1-7) on multimedia media that also has standard protection against permission disks and hardware chips. - 8 Item designation 1 - Degree protection step of block letters 2 - Degree of step protection in the block 3 - Degree of protection angle in the block 4 - Degree protection uneven font 5 - Degree font size protection 6 - Degree protection target defect 7 - Degree to protect the thickness of the font 8-14 - Random Number Generators 15-21 - Markings 22-28 - Carriers 28a - Input signal generating unit 29 - Control computer 30 - Deviation system 31 - Laser 32 - Feed table 33 - Valuable document 34 - First automatic reader 35 - Comparator assisted 35a - Unified output of markings 36 - Built-in unit 36a - Distribution block 366 - Second automatic reader 37 - End control unit 38-44 - Missing banknotes 45-51 - Multimedia media endpoint blocks for each level of protection individually