美國
US 12,697,833 B2
Optical devices and methods of manufacture thereof
US 12,697,833 B2 是美國專利商標局（USPTO）的核准專利，日期 2026-08-04。申請人：DE LA RUE INTERNATIONAL LIMITED。PDF 可在本頁下載，未登入每天最多 5 篇。
- 申請人
- DE LA RUE INTERNATIONAL LIMITED
- 發明人
- Brian HOLMES; Frederic FOURNIER; Maria KING
- 公開日
- 2026-08-04
- 申請日
- 2023-05-04
- 文件種類
- B2 核准公告
- 也寫作
- US 12,697,833 B2 · US12697833 · 12697833
摘要
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.…
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專利局網站： 美國專利商標局（USPTO）