Information recording system
US4525824A · kind A · utility
3Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1982 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Jun 2, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10595
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an information recording system having a recording light beam passing through a focus lens, and a focus servo mechanism for adjusting the position of the focus lens, characterized by the provision of a bias beam of a weak intensity for producing a continuous control signal for the focus servo mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.