Optical security component
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.
1. An optical security component for authenticating a document or a product comprising:
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 a viewing direction oriented from the transparent plastic film to the dielectric material; and
a colored contrast layer having transparent zones and colored zones on the low optical index layer.
2. The optical component according to claim 1 , wherein the contrast layer and the low optical index layer are merged.
3. The optical component according to claim 2 , wherein certain of the zones have a recognizable form.
4. The optical component according to claim 1 , wherein the contrast layer has transparent zones and colored zones.
5. The optical component according to claim 1 , wherein the colored layer comprises black pigments.
6. The optical component according to claim 1 , further comprising a diffusing layer arranged between the stamped surface and the viewing surface.
7. The optical component according to claim 1 , in the form of a thread of a width between about 1.2 and about 4 millimeters.
8. The optical component according to claim 1 , further comprising an intermediary layer formed by a metallic layer the presence of which can be monitored by machine.
9. The optical component according to claim 8 , wherein the intermediary layer is continuous.
10. The optical component according to claim 8 , wherein the intermediary layer is discontinuous.
11. The optical component according to claim 1 , further comprising an intermediary layer formed by a reflective layer.
12. The optical component according to claim 11 , wherein the intermediary layer is continuous.
13. The optical component according to claim 11 , wherein the intermediary layer is discontinuous.
14. The optical component according to claim 1 , further comprising an intermediary layer formed by a partially metallized layer.
15. The optical component according to claim 14 , wherein the intermediary layer is continuous.
16. The optical component according to claim 14 , wherein the intermediary layer is discontinuous.
17. The optical component according to claim 1 , further comprising an intermediary layer formed by a layer reacting to a laser in a manner to enable individual personalization of the optical component.
18. The optical component according to claim 17 , wherein the intermediary layer is continuous.
19. The optical component according to claim 17 , wherein the intermediary layer is discontinuous.
20. The optical component according to claim 1 , further comprising an intermediary layer formed by a colored layer of a color different from the contrast layer.
21. The optical component according to claim 20 , wherein the intermediary layer is continuous.
22. The optical component according to claim 20 , wherein the intermediary layer is discontinuous.