Optical identifier and system for reading same
US11244705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2019 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Sep 15, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2227/05
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system includes a plurality of optical identifiers and a reader for the optical identifiers. Each optical identifier has an optical substrate and a volume hologram (e.g., with unique data, such as a code page) in the optical substrate. The reader for the optical identifiers includes an illumination source (e.g., a laser), and a camera. The illumination source is configured to direct light into a selected one of the optical identifiers that has been placed into the reader to produce an image of the associated volume holograms at the camera. The camera is configured to capture the image. The captured image may be stored in a digital format by the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.