Semiconductor light emitting device and apparatus using the same
US5046798A · kind A · utility
23Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Aug 1, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48247
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A collimated-beam generating device using a semiconductor laser includes a two-lens system in which light converged by a first lens is converted into a collimated beam by a second lens, whereby a distance between the semiconductor laser and the first lens is made large, assembly of the device is made easy, and a collimated beam having a small beam diameter can be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.