Modifying optical properties of thin film structures using an absorbing element
US10539727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2016 |
| Grant date | Jan 21, 2020 |
| Priority date | — |
| Expiry date | Sep 6, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M3/148
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method of making a multi-layered film includes depositing thin film layers onto a first side of a double-sided transparent substrate. The thin film layers are transparent, and two adjacent layers of said plurality of thin film layers have different refractive indices. One or more absorbers are deposited at an interface formed between two of the thin film layers that are adjacent to one another, or formed by the first side of the substrate and one of the thin film layers. The absorbers absorb selected wavelengths of incident light and reflect part of the incident light after inducing a phase shift. The location of the interface is selected to provide desired wavelengths of absorbed and reflected light. The multi-layered film has a first appearance when viewed from the first side of the substrate and a second appearance when viewed from the second side of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.