Multiple data surface optical data storage system
US5202875A · kind A · utility
118Cited by
16References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1991 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Jun 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data storage system comprises a multiple data surface medium and optical head. The medium comprises a plurality of substrates separated by a light transmissive medium. Data surfaces are located on the substrate surfaces which lie adjacent a light transmissive medium. The data surfaces are substantially light transmissive. The optical head includes an aberration compensator to allow the head to focus onto the different data surfaces and a filter to screen out unwanted reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.