{"number":"US12697833B2","kindCode":"B2","documentType":"grant","title":{"original":"Optical devices and methods of manufacture thereof","english":"Optical devices and methods of manufacture thereof"},"abstract":{"original":"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.…","english":"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.…"},"applicants":["DE LA RUE INTERNATIONAL LIMITED"],"inventors":["Brian HOLMES","Frederic FOURNIER","Maria KING"],"filingDate":"2023-05-04","publicationDate":"2026-08-04","grantDate":"2026-08-04","verifiedWithOffice":true,"pdfUrl":"https://downloadpatent.com/pdf/US12697833B2.pdf","pages":{"en":"https://downloadpatent.com/patent/US12697833B2","zh-Hant":"https://downloadpatent.com/zh-Hant/patent/US12697833B2","ja":"https://downloadpatent.com/ja/patent/US12697833B2"}}