Optical pickup device having fixed and movable optical systems
US5140572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1990 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Feb 16, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A separation type optical pickup device which comprises a fixed optical system and a movable optical system which is separated from the fixed system. The fixed optical system is unmovable with respect to an optical information recording medium. The fixed system includes an optical beam emission system and a deflection member which deflects a beam emitted from the emission system. The deflection member is disposed on an optical axis of the beam and rotatable about a rotary axis which is parallel to the optical axis of the beam. The movable optical system is movable with respect to the information recording medium and guides the beam transmitted from the fixed optical system to the recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.