Optical fail safe device
US4740050A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1982 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Jul 6, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An output device is disclosed including a first light light guide having an input port and an output port; a second light guide adapted to allow light to be inserted into said first light guide at a first location in said first light guide; means for absorbing light propagating through a second location in said first light guide, said second location being between said input port and said first location; and means for allowing the detection of information concerning light propagating in said first light guide, said means for allowing detection being located between said input port and said first location. Four embodiments are presented, each being integrated optical devices adapted to provide fail safe protection when used in a bus line system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.