Light space-transmission device
US6618177B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1999 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Jul 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/118
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A light space-transmission device includes a light beam transmitting block for modulating a light beam with information signal and for transmitting the light beam, a first luminous-flux-diameter converting part for enlarging the luminous-flux-diameter of the light beam that is sent from the light beam transmitting block and for transmitting the light beam, a second luminous-flux-diameter converting part for enlarging the luminous-flux-diameter of the light beam that is sent from the first luminous-flux-diameter converting part and for transmitting the light beam. An optical-axis correcting portion is inserted into the optical path of the light beam between the first luminous-flux-diameter converting part, and the second luminous-flux-diameter converting part and controls the angle of the optical axis of the light beam thrown to the second luminous-flux-diameter converting part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.