Optical data recording/reproduction apparatus for use with semiconductor lasers as a light source
US5337302A · kind A · utility
6Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1993 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Jul 13, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1376
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data recording and reproduction apparatus which uses a semiconductor laser as a light source is disclosed. The half angle of light issuing from the laser in a junction direction of the laser and the focal length of a condenser lens adapted to focus a laser beam from the laser are adequately selected in such a manner as to satisfy a particular condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.