Optical pickup with a two-detector arrangement
US4683559A · kind A · utility
3Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1984 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Apr 19, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup for detecting a distance to an optical disk on which information is optically stored includes a tracking error detecting device for detecting a tracking error by receiving a part of the light reflected from the disk and a focusing error detecting device for detecting the remaining part of the light reflected from the disk, structured such that the tracking error detecting device receives 60% or more of the reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.