Method for producing laser hologram anti-counterfeit mark with identifying card and inspecting card and inspecting apparatus for the mark
First Claim
1. A method for producing laser hologram anti-counterfeit mark composed of identifying card and inspecting card, said method comprising the steps of:
- coding predetermined or randomly-produced image originals to provide coded image originals, and converting the coded image originals into information in a frequency domain;
dividing arbitrarily a frequency spectrum plane converted from the coded image originals into two parts and using them as double-card master masks;
using an optic method or a CGH (computer-generated hologram) method to transform at least one of the double-card master masks to a first photoresist plate;
using the optic method or the CGH method to transform the other one of the double-card master masks to a second photoresist plate;
making the identifying card and the inspecting card by one of developing, electroforming, and die pressing above said first and second photoresist plates separately onto an identifying card substrate and an inspecting card substrate.
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Abstract
The present invention provides a method for producing double-card anti-counterfeit marks with interlock protection based on the technique which combines nuclear technology with computer-generated hologram (CGH) technology and inspecting apparatus for the mark. The invention relates to the technical field of optical information processing in physics. The technical feature of the invention is to insert potential images R,T and matched potential images R'"'"',T'"'"' in the anti-counterfeit identification marks and in the inspecting identification marks respectively by means of charged particle track image in sampling coincidence with CGH. When R coincides with R'"'"', a certain message of genuineness for an identification mark will be shown, and when T coincides with T'"'"', different specific information in thousands of ways appears to prove the genuineness of the protected objects. Because of the microscopic characteristics of nuclear tracks and the distribution characteristics of the phase hologram on the frequency spectrum plane, the potential images R,T,R'"'"',T'"'"', as the information carriers, can'"'"'t be duplicated and must be coincided respectively, so as to prevent the genuine anti-counterfeit marks from the illegal imitation.
75 Citations
12 Claims
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1. A method for producing laser hologram anti-counterfeit mark composed of identifying card and inspecting card, said method comprising the steps of:
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coding predetermined or randomly-produced image originals to provide coded image originals, and converting the coded image originals into information in a frequency domain; dividing arbitrarily a frequency spectrum plane converted from the coded image originals into two parts and using them as double-card master masks; using an optic method or a CGH (computer-generated hologram) method to transform at least one of the double-card master masks to a first photoresist plate; using the optic method or the CGH method to transform the other one of the double-card master masks to a second photoresist plate; making the identifying card and the inspecting card by one of developing, electroforming, and die pressing above said first and second photoresist plates separately onto an identifying card substrate and an inspecting card substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An inspecting apparatus for said double-card track laser hologram anti-counterfeit identification mark, said apparatus comprising:
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a light source; an identifying card base and inspecting card base with a location function; a testing probe comprising an imaging system and a photoelectronic converter unit; and a processor; wherein said imaging system comprises an optical device for conversion of an identifying card and inspecting card representative of information in a frequency domain to information in a space domain, said optical device including an inspecting screen installed for directly observing results, and wherein said processor is connected to said photoelectronic converter unit and is controlled by an identifying program of the electronic identification system. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification