Semiconductor laser apparatus driving system
US4942584A · kind A · utility
14Cited by
1References
15Claims
0Family size
Inventors
Key dates
| Filing date | Jun 16, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Jun 16, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a semiconductor laser apparatus driving system, forward or/and backward beams from a plurality of semiconductor laser beam sources are detected, and arithmetic operations are provided for the detection outputs to determine the light outputs of the respective ones of the semiconductor laser beam sources. The use of a condenser lens which has been used in conventional system is eliminated and, as a result, precise positioning of such lens is avoided, and the semiconductor laser apparatus driving system can be mass-produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.