Optical data storage
US4486870A · kind A · utility
Inventors
Key dates
| Filing date | Jul 19, 1982 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Jul 19, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K1/126
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A thermoplastics data storage member carries information which can be imaged using non-coherent light and, in addition to and distinct from that information, control data which defines a two-coordinate system for the member which controls random access to the information. A reading apparatus comprises a non-laser optical system for imaging selected areas of the information and a servo-system, including a microprocessor and transducers for reading the control data, for positioning a reading head of the optical system in desired locations relative to the storage member. The invention affords cheap optical data bases readable by apparatus not requiring a laser optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.