Invisible graphics context identifying system and fabrication method thereof7010123Abstract The discrimination system of the cryptic graph-text document and manufacturing method thereof is to digitize and decompose the cryptic document and fix them onto the surfaces of the digital reader and printed sheet, which present themselves as the cryptic documents. An array of numerous miniaturized lenses with specific focal lengths is distributed on the surface of the reader. When the printed sheet is covered with a specific digital reader at a specific location, the corresponding document is revealed and presents as the original document and alternating the darkness of the pattern from heavy to light and from invisible to visible gradually while changing the visual angle. Several digital readers are matched to one printed sheet, resulting in different cryptic patterns accordingly. The discrimination system is intuitive, simple and speedy, and is difficult to imitate. This technique is good for making licenses, bills, money notes, stamps, packages of goods, and all others that require anti-counterfeiting marks attached. Claims What is claimed is: Description TECHNICAL FIELD OF THE INVENTION
The advantages of the present invention over the prior art are:
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of the composition of the cryptic graph-text pattern discrimination system. FIG. 2 is a schematic diagram of grid shape miniaturized lenses of the digital reader. FIG. 3 is a schematic diagram of step-shaped miniaturized lenses of the digital reader. FIG. 4 is a schematic diagram of wavelike arranged miniaturized lenses of the digital reader. FIG. 5 is a schematic diagram of specially arranged miniaturized lenses of the digital reader. FIG. 6 is a schematic diagram of transparent holes of the digital reader. FIG. 7 is a flow diagram of the producing procedure of the cryptic graph-text pattern discrimination system. PREFERRED EMBODIMENTS OF THE INVENTION The present invention will be described more detail by reference to the appended drawings. As shown in FIG. 1, the cryptic graph-text pattern discrimination system comprises printed sheet 1 and the matched digital reader 2. The complete cryptic document comprising the digitized individual cryptic graph-text patterns are printed on the surface of the cryptic document sheet. The appearance of the complete cryptic document is just the high-density dot group 3. The material of the printed sheet can be transparent, translucent or non-transparent. When the matched digital reader 2 is covered on the surface of printed sheet 1, one can look through the lenses and see the original document on the printed sheet 1. If the visual angle is rotating around the axis from 0 to 360 degrees, the pattern read is alternating from visible to invisible and from light to heavy. When different readers 2 are covered on the surface of the same document sheet different documents are read. If the material of the printed sheet 1 is transparent or translucent, the digital dot group 3 can be fixed on both side of the printed sheet 1 by double side pressing or rolling. Due to the refraction and reflection of transparent light, one can see some cryptic patterns on sheet 1 and when a matched reader 2 is covered on it one can see some other cryptic patterns. As shown in FIGS. 2 through 6, the surface of the reader 2, as a whole or divided into several parts, are covered by different kinds of omni-directional lens arrays and the surface of the vein is uneven or smooth and many miniaturized lenses with specific focal lengths are distributed on it. All arrays are fixed with convex lenses or holes or both of them. The lenses/holes are arranged in accordance with the high-density dot group 3 of one of the individual cryptic patterns and which is digitized beforehand. The lenses can be in grid arrangement or in step-shaped or in wavelike pattern or with special combination. As shown in FIG. 5, the shapes and the sizes of individual lens and the pole coordination and the polar angle of the arrangement, the spacing, and the focal lengths of the lenses can all be adjusted when needed. The omni-directional lens array used is different from those of parallel cylindrical grating. The material, transparency, refractive index, and the composition of colors can all be changed and create specific combinations. The control of the parameters of the cryptic anti-counterfeiting products is highly arbitrary and unique, and the reverse engineering of the parameters is impossible. It is easy to define the parameters and produce the products. The decomposition, imitation and reproduction are very difficult. Even the pattern of the copy reproduced looks very similar to the real one, but the small difference of the parameters will cause the changes of the focal length and the focus, thus the pattern would be blurred and the contrast become worse and part of the document would be missing when read the cryptic document through a digital reader 2. Digital readers 2 are made of transparent or translucent material such as plastic or colloid and the plastic material may be PET, PVC, PC, PE, ABS and PP. In order to prevent the reproduction of the digital readers 2, some cryptic patterns can be fixed on the surface near the edge and another digital reader can read these patterns. The appearance of the digital reader is like a credit card or any other form. It can be a rigid card or a flexible one. For a rigid card, it is easy to be carried and checked, and a flexible card conforms to curve surfaces. As shown in FIG. 7, the producing method of the system for discrimination of cryptic graph-text document is: the system includes the printed sheet 1 and the matched digital reader 2. Enciphering/digitizing the visible and cryptic graph-text documents step by step by the use of randomly generated enciphering system, results in the digital graph-text document. Enciphering parameters of the multivariate function are assigned in each step and then the parameters are deleted before the next step is commencing for the sake of keeping secrecy. Then, decompose the graph-text documents by the operational decomposing digitizing system and create different individual cryptic patterns for the corresponding digital reader functions and the complete cryptic document for the cryptic document function, respectively. Then, fix the documents on the surfaces of the digital reader 2 and printed sheet 1, respectively, and form the high-density dot groups by the use of high-precision optical output instruments. Then superimpose the decomposed cryptic graph-text documents so that the multi-dot groups are overlapped. The colors and patterns are mixed together. The sizes, shapes, directions and spacing of the dots are all different. The cryptic document is thus created with numerous parameters. The relationship of above-mentioned individual cryptic patterns and the complete cryptic document can be expressed as follows:
The method of making a printed sheet with the cryptic graph-text document and a digital reader with the cryptic pattern on the surfaces is as follows: Suppose that, the 1st individual cryptic graph-text document is A
With reference to FIG. 7, digitizing the cryptic graph-text document A, B and the visible graph-text document is as follows: Firstly, input the operational digitizing system of document: enciphering and executing the digitizing process. Secondly, enter the operational decomposing digitizing system and sort the graph-text documents, resulting in the individual pattern of the digital reader A′ and B′ and the complete cryptic graph-text document of the cryptic graph-text documents. By the use of high-precision optical output instruments, the individual cryptic pattern of the digital reader A′ is fixed on the surface of the digital reader A′, the individual cryptic pattern of the digital reader B′ is fixed on the surface of the digital reader B′; and the complete cryptic graph-text document of the cryptic graph-text documents is fixed on the surface of the printed sheet. If the digital reader A′ is covered on the right position and the right orientation of the printed sheet, the individual document A is revealed and if the digital reader B′ is covered on the right position and the right orientation of the printed sheet, the individual document B is revealed. The same cryptic document or two different cryptic documents can be fixed on both sides of one printed sheet. The technique of fixing the cryptic document onto the surface of the document sheet is by printing, silk-screen printing, electronic printer, gilding press, heat pressing, biting in, photo etching, hologram, stamping, thermoplastic technique, transcription, and so on. In order to enhance the concealment of the anti-counterfeiting products, more than one cryptic document can be placed on the surface of a printed sheet and the same number of readers are also used to read the corresponding documents on that printed sheet. The anti-counterfeiting products are suitable to many applications such as ID cards, permits for admission, different passes and licenses, passports, credit cards, intelligent cards, different magnetic cards, computer software, hard discs, LDs, stamps, money notes, bills, checks, receipts, birth certificates, contracts, permits, documents for clearing customs, and packages of famous products that need anti-counterfeiting measure. A method of making printed sheet with cryptic graph-text documents, and digital readers on both sides is as follows: As described above and is shown in FIG. 7, the material of the printed sheet is transparent or translucent and cryptic documents are fixed on both sides of the sheet. The technique of fixing the cryptic documents on both sides of the printed sheet is by rolling or by pressing. Due to the refraction and the reflecting of the transparent light, a special pattern can be seen on the printed sheet itself, suggesting that the printed sheet is already carrying the cryptic documents. If the corresponding digital reader is covered on the printed sheet, a certain document is revealed. This product can be applied as the sealing strips for package, sealing labels for bottles. and the envelopes of different credentials. One can read the revealed document either with the naked eye or by the automatic mode discrimination system of the computer. For example: store the special digitized discrimination data of the digital reader in the computer beforehand, then input the cryptic document from the printed sheet to the computer, then let the computer compare the effective digital code collected with the data stored at each corresponding point, by the use of a scanner (use visible light, ultra violet, infrared, or X-ray), point-by-point automatically. If the comparison result is in agreement with what is preset, the result is accepted and the cryptic document would be displayed on the computer screen. This method can also be used to discriminate the complete cryptic document comprising several individual cryptic documents with same number of special digitized discrimination data groups individually and automatically. If each of the individual comparison result is in agree with the specific cryptic pattern, the complete results are accepted. By this way, the classification of security is achieved. Any changes and modifications based on the present invention are within the spirit and the scope of the protection of the present invention.
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