Separation type optical pick-up device
US5159587A · kind A · utility
5Cited by
13References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1989 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Dec 1, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The separation type optical pick-up device includes a movable optical unit and a stationary optical unit having a detection portion for detecting a discrepancy between an optical axis of a light beam emitted from an emitting portion of the stationary optical unit and an optical axis of a light beam returned from the movable optical unit, and is adapted to correct the discrepancy while driving a carriage of the movable optical unit on the basis of the detected discrepancy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.