Method of manufacturing of diffraction grating-based optical identification element
US7092160B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2003 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Sep 12, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for manufacturing a diffusion grating-based optical identification element is provided. The optical identification element includes a known fiber substrate, having a diffraction grating disposed therein the grating being indicative of a code when exposed to incident light. A large number of elements or microbeads all having the same identification codes can be manufactured by cutting the substrate transversely where the grating is located, thereby creating a plurality of elements, at least two of the elements having the grating therein along substantially the entire length of the elements. The elements may be manufactured in many different ways, including winding the fiber onto a basket, forming the gratings in the basket openings or bays, removing the fiber and cutting the fiber to form the elements 8. Each bay may have a set of elements with a unique set of codes therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.