Optical data storage apparatus and method
US5235587A · kind A · utility
45Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Mar 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data storage apparatus and disc in which information is stored in the form of multiple submicron depths at information-storage sites on the disc surface. The depth information is read by directing a focused laser beam onto the storage sites, back reflecting a portion of the reflected beam into the laser cavity, and converting power fluctuations in the laser beam to submicron distance measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.