Optical device for the recording and reading of data media and optical memory system incorporating such a device
US4387452A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1981 |
| Grant date | Jun 7, 1983 |
| Priority date | — |
| Expiry date | Jan 21, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The device makes it possible to optically inscribe and/or read at least two facing sides of disks in an optical memory system, whose disks are stacked. A linear motor displaces a mobile means incorporating recording-reading heads. These heads receive via a bidirectional optical connection data to be inscribed and coming from fixed light emitters-receivers. Each of the recording heads comprises two focusing lenses associated with one of the two facing sides of the disk. According to a first variant, the two sides can be read simultaneously, each of the lenses being associated with its own control device. In a second variant, a single control device is provided and the two focusing lenses are integral with one another, each side being read or inscribed in succession.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.