LABEL WITH DIFFRACTION BARCODE AND READING DEVICE FOR SUCH LABELS Russian patent published in 2007 - IPC G06K19/16 G06K7/10 

FIELD: labels with diffraction barcodes and reading device for information recognition on such labels.

SUBSTANCE: label contains at least one machine-readable diffraction barcode, which consists of narrow rectangular fields and intermediate surfaces covered by optically active structures. Optically active structures covered by reflecting layer are sealed in layers of laminated structure. Relief structure of fields diffracts and polarizes in defined plane the incident light and disperses the diffracted light into half-space above the diffraction relief structure. Other microscopically small optically active structures differ from the diffraction relief structure by at least polarizing capabilities. Polarized back-scattered light can be registered by one of the known standard reading devices for barcodes made by printing technique.

EFFECT: creation of inexpensive machine-readable label with diffraction barcode, which can be read by standard reading devices at a distance of several decimeters.

20 cl, 9 dwg