Laser diode of variable beam divergence and information processor using the same
US5241554A · kind A · utility
6Cited by
2References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Aug 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/2231
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a laser diode and a highly precise light information processor using the same, particularly a laser diode which controls the diameter of a current flowing through an active layer and changes the emitting area of the active layer, a laser printer which is suited to half tone expression with high image quality by using the above semiconductor laser device, and an optical disk device which can record data surely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.