Optical security component

Details Optical security component Optical security component

2005-09-13

2005-09-13

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Light interference

Produced by coating or lamina

C359S587000, C359S580000, C359S566000

Reexamination Certificate

active

06943952

ABSTRACT:
An optical security component for authenticating a document or a product including a transparent plastic film embossed to form an embossed surface and to have at least one diffraction grating; a layer of dielectric material of high optical index at least partially coated on the embossed surface and producing a colored effect of a first color for a first orientation of the component and a second different color for orientation perpendicular to the first orientation; a low optical index layer coated on a side opposite the viewing direction of the dielectric material; and a colored contrast layer having transparent zones and colored zones on the low optical index layer.

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patent: 2126949 (1984-04-01), None
patent: WO 01/07268 (2001-02-01), None

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