Separation type optical pickup device
US5172356A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A separation type optical pickup device divided to a fixed optical unit and a movable optical unit. The device comprises an optical output system for emitting an optical beam arranged in the fixed unit. An optical detection system is arranged in the fixed unit. A focusing system is arranged in the movable unit for forming an optical spot on an information record medium. A deflection member is arranged in the fixed unit for deflecting and guiding the beam emitted from the optical output system to the movable unit. The member has a deflection surface which is universally rotatable about a deflection point thereof. An optical axis adjuster mechanism is arranged in the fixed unit for shifting and adjusting the optical output system in a direction perpendicular to an optical axis thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.