Synthesis of superpostion shape images by light interacting with superposed layers of lenslet gratings
US10899161B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2016 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Nov 2, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/44
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention describes methods and apparatuses for creating superposition shape images by superposed base and revealing layers of lenslet gratings. The superposition shape images form a message recognizable by a human observer or by an image acquisition and computing device such as a smartphone. The superposition shape images may be created by different superposition techniques ranging from 1D moiré, 2D moiré and level-line moiré superposition techniques to lenticular image and phase shift superposition techniques. Moiré superposition techniques enable creating superposition shape images at different apparent depth levels. Applications comprise the protection of documents and valuable articles against counterfeits, the creation of eye-catching advertisements as well as the decoration of buildings and exhibitions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.