Optical reporting reproducing device having fixed and movable optical systems
US5444683A · kind A · utility
19Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1994 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Jan 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08564
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical record reproducing device including a movable optical system for moving along a radial direction of an optical disc, a separated optical system including a light source and a separated fixed optical system, a tracking control system having a reflective mirror for reflecting a laser beam irradiated from the light source toward the movable optical system and an accurate angular displacement mechanism including an angular displacement detector for directly detecting an angular displacement of the reflective mirror so as to control the movable optical system accuarately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.