Multi-channel recording/playback optics for laser diode arrays
US4520471A · kind A · utility
17Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1983 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Feb 7, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical record and playback system is described for use in a multi-channel data processing system. An optical head which includes a laser diode array comprises a collection objective, an anamorphic beam expander and a focusing lens. The optical head collects the laser beams emitted by the diode array, expands the beam cross-section to form circular beams and focuses the beams to diffraction limited spots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.