Surface pattern

Details Surface pattern Surface pattern

2005-03-22

2005-03-22

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S566000, C359S558000

Reexamination Certificate

active

06870678

ABSTRACT:
A surface pattern (18) is in the form of a visually visible mosaic comprising a number of surface portions (8; 9; 15; 16; 17) and is embedded in a laminate (1) comprising at least a transparent cover layer (2) and a protective layer (5). The surface portions (8; 9; 15; 16; 17) are transparent, scatter or reflect incident light (10) or diffract the incident light (10) at microscopic relief structures (4). The surface portions (8; 9; 15; 16; 17) are at least partially covered with a reflection layer (3). At least one of the surface portions occupied by a microscopic relief structure (4), an area (16), is a ZOM-structure (4′) with a predeterminedly slowly varying profile height h and a spatial frequency f, wherein the product of a predetermined limit wavelength λGof the visible spectrum and the spatial frequency f is greater than or equal to one.

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