United States
US 12,697,833 B2
Optical devices and methods of manufacture thereof
US 12,697,833 B2 is a granted patent from the United States Patent and Trademark Office (USPTO), dated 2026-08-04. Applicant: DE LA RUE INTERNATIONAL LIMITED. Its PDF downloads from this page without an account, up to 5 a day.
- Applicant
- DE LA RUE INTERNATIONAL LIMITED
- Inventors
- Brian HOLMES; Frederic FOURNIER; Maria KING
- Publication date
- 2026-08-04
- Filing date
- 2023-05-04
- Document type
- B2 Granted patent
- Also written as
- US 12,697,833 B2 · US12697833 · 12697833
Abstract
An optical device includes: first grating regions each having a plurality of first grating elements each having a principal component of orientation substantially orthogonal to a first direction; and second grating regions each including a plurality of second grating elements each having a principal component of orientation substantially orthogonal to a second direction. At least a subset of the first grating regions each exhibit a diffractive colour such that a user viewing at a first viewing angle perceives a first diffractive colour image.…
The opening of the abstract. The full text is in the PDF.
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