System for the detection of information in the form of electromagnetic radiation and reading the detected information
US5008544A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jul 19, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/1575
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
It comprises information photodetection means (2), which have N photodetectors (6), each photodetector being able to supply a current having an information-carrying component and a non-information carrying component, N being an integer at least equal to 1, reading means (4) for the thus detected information and which use for this purpose the current supplied by each photodetector, and N other regulatable means (22) respectively associated with the N photodetectors each other regulatable means being able to extract a regulatable intensity current from the current supplied by the associated photodetector prior to the use of said latter current by the reading means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.