Redundant optical recording of information in different formats
US4711996A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1985 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Apr 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/904
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Information is recorded in situ on a wallet-size card by disposing laser recordable material in the card, then recording indicia, in situ, on the material with a laser. At least some of the indicia are microscopic eye readable information, with the rest being machine readable information, with the eye readable information being redundant with at least some of the machine readable information. This visually read information is recorded as characters made up of matrices of nonconnected laser recorded spots. The characters may be alphanumeric characters, or the like. The characters are read with an optical magnifier. A laser beam and light detector may be used to read the digital information by scanning the card with the beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.