Optical communication module
US6353491B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1998 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Aug 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/40
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical communication module comprises a light emitting element for generating the transmission signal, a condenser lens for connecting the transmission signal light from the light emitting element to the light transmission line, a light receiving element for receiving the receiving signal light from the light transmission line, and a package that covers the light emitting element and the light receiving element, and uses the condenser lens as an opening window, wherein the wavelength selective film for allowing the required waveband light to transmit and the unwanted waveband light to reflect is coated on the transparent member installed on or in the vicinity of the convex surface of the condenser lens. As a result, a bi-directional optical communication module of an inexpensive construction can be obtained, which can receive the desired waveband light only without using a special component such as a wave separator and does not return the unwanted waveband light to the light transmission line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.