Data storage in a diffractive optical element

Details Data storage in a diffractive optical element Data storage in a diffractive optical element

G - Physics

07

D

G07D 7/12 (2006.01) B42D 15/10 (2006.01) B44F 1/12 (2006.01) G02F 7/00 (2006.01) G06K 19/16 (2006.01)

Patent

CA 2637399

A diffractive optical element (DOE) and various methods of producing such a DOE are provided in which a diffractive optical microstructure (5) is formed with encrypted data on at least one side of a transparent substrate (2) or in a layer applied to the substrate (2). The diffractive optical microstructure (5) when illuminated with collimated light, generates a far field interference pattern corresponding to the encrypted data which may be decrypted with suitable optical detectors and processing equipment.

L'invention concerne un élément optique diffractif (EOD) ainsi que divers procédés de production d'un tel OED dans lesquels est formée une microstructure optique diffractive (5) comprenant des données chiffrées sur au moins un côté d'un substrat transparent (2) ou dans une couche appliquée sur le substrat (2). Lorsqu'éclairée à l'aide d'une lumière collimatée, la microstructure optique diffractive (5) génère des franges d'interférence champ éloigné correspondant aux données chiffrées qui peuvent être déchiffrées à l'aide de détecteurs optiques et d'un équipement de traitement appropriés.

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