METHOD OF PRODUCING AN OPTICAL STRUCTURE ON A PLURALITY OF BODIES

In the described method of producing a plurality of bodies bearing equal imprints of a stamp as optical structures, a stamp ( 13 ) is initially produced, by attaching particles ( 14 ) to a surface ( 15 ) of an auxiliary body ( 16 ); than, the stamp ( 13 ) is used to produce an imprint ( 11 ) on a pl...

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Bibliographische Detailangaben
Hauptverfasser:	T HOOFT, GERT, W, HENDRIKS, ROBERT, F., M, BAKKER, LEVINUS, P, STALLINGA, SJOERD, GOOSSENS, HENDRIK, J, VULLERS, RUDOLF, J., M, VAN DER LEE, ALEXANDER, M, HENDRIKS, BERNARDUS, H., W, SCHUURMANS, FRANK, J., P, KURT, RALPH
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PERFORMING OPERATIONS PHYSICS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	In the described method of producing a plurality of bodies bearing equal imprints of a stamp as optical structures, a stamp ( 13 ) is initially produced, by attaching particles ( 14 ) to a surface ( 15 ) of an auxiliary body ( 16 ); than, the stamp ( 13 ) is used to produce an imprint ( 11 ) on a plurality of bodies ( 10 ). Optical structures can be irradiated, producing on a screen a speckle pattern indicative of a key. It is substantially impossible to clone a given optical structure with current technological means. Optical structures represent physical One-Way Functions, easy to compute in the forward sense but unfeasible to reverse. Thus, they can be used to build an access/copy protection system of user information contained in an information carrier associated with the body 10 . The reproducibility of the optical structures makes this method suitable for optical disks.