Laser diode and multibeam optical head using the laser diode
US5144616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Mar 13, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4031
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information reading and writing system, comprising an optical recording medium and a multibeam optical head optically coupled to the optical recording medium. The optical recording medium has a plurality of uniformly spaced tracks in a radial direction of the medium for recording information thereon. The multibeam optical head is movable in the radial direction of the medium and includes a laser diode and an image forming optics. The laser diode has a plurality of nonuniformly spaced lasing elements in a straight line for generating a plurality of spaced laser beams. The image forming optics directs each laser beam onto a respective tracks of the optical recording medium. The spacing between the adjacent laser beams on the tracks corresponds to the spacing between the adjacent lasing elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.