Optical display device
US10768348B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2016 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Dec 17, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical display device (600, 700) is disclosed. A diffractive optical element (618, 718) is mounted on a substrate (611, 711). The diffractive optical element comprises a blazed grating (619, 719) and a remnant layer (617, 717) which is formed of the same polymer-based material as the blazed grating. The remnant layer (617, 717) is positioned adjacent the substrate (611, 711) and a refractive index mismatch is provided between the two. The depth of the remnant layer is selected so that light diffracted by the grating and light reflected by the interface re-combine and interfere constructively for selected angles of incidence in order to undergo thin-film interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.