Optical head apparatus for optical disc player
US4822139A · kind A · utility
16Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical head apparatus for an optical disc player which stabilizes the servo action, enables high speed access, extends the drawing range of tracking servo action, and further enhances the servo stability. This is done by making the driving mechanism and movable parts for access common to those for tracking to reduce the weight, and moving the stand carrying the condenser lens and mirror in focusing, tracking and accessing in the direction of the optical axis to eliminate deviation of the optical path, and also fixing the tracking and access coils to the condenser lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.