Optical device, laminate and labeled article

Details Optical device, laminate and labeled article Optical device, laminate and labeled article

2010-03-18

2011-11-08

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S566000, C359S558000

Reexamination Certificate

active

08054550

ABSTRACT:
A special visual effect is achieved. An optical device includes a light-reflecting interface provided with a first relief structure including first recesses or protrusions arranged two-dimensionally, the first relief structure emitting a first diffracted light when illuminated with a light, and a light-transmitting interface disposed in front of the light-reflecting interface and having a reflectance smaller than that of the first interface, the light-transmitting interface being provided with a second relief structure including second recesses or protrusions arranged two-dimensionally, and the second relief structure emitting a second diffracted light when illuminated with the light.

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