Wavelength selective coatings for optical disc security

Details Wavelength selective coatings for optical disc security Wavelength selective coatings for optical disc security

2007-09-11

2007-09-11

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Layered

C369S103000, C369S275100

Reexamination Certificate

active

11146765

ABSTRACT:
An optical disc for data storage includes a layer of color-shifting material. Light passing through the color-shifting layer will have a color determined by the various constructive and destructive interference of the various wavelengths after they have passed through the material, diffracted while passing through the material, and are reflected off of various portions of the material, resulting in a color change when the viewing angle is changed. Additionally, an optical variable device may be defined within the disc, and may include the color-shifting layer.

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