Optical coupling devices
US7125175B2 · kind B2 · utility
5Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 2004 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Apr 29, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4237
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser transmitter unit is described, the unit including a laser diode 2 emitting laser radiation into a lens system. The lens system includes collimating lenses L1, L3 and focussing lenses L2, L4. Additionally, compensating or steering lens S1, S2 are positioned between the collimating lenses L1, L3 and the focussing lenses L2, L4. The steering lenses S1, S2 act to reduce the sensitivity of the focussing lenses L2, L4 to position within the lens system. The position of the focussing lenses can be difficult to control, particularly when the lenses are welded into position in the laser transmitter unit 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.